--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/tree-inline.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,4522 @@
+/* Tree inlining.
+   Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   Free Software Foundation, Inc.
+   Contributed by Alexandre Oliva <aoliva@redhat.com>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "toplev.h"
+#include "tree.h"
+#include "tree-inline.h"
+#include "rtl.h"
+#include "expr.h"
+#include "flags.h"
+#include "params.h"
+#include "input.h"
+#include "insn-config.h"
+#include "varray.h"
+#include "hashtab.h"
+#include "langhooks.h"
+#include "basic-block.h"
+#include "tree-iterator.h"
+#include "cgraph.h"
+#include "intl.h"
+#include "tree-mudflap.h"
+#include "tree-flow.h"
+#include "function.h"
+#include "ggc.h"
+#include "tree-flow.h"
+#include "diagnostic.h"
+#include "except.h"
+#include "debug.h"
+#include "pointer-set.h"
+#include "ipa-prop.h"
+#include "value-prof.h"
+#include "tree-pass.h"
+#include "target.h"
+#include "integrate.h"
+
+/* I'm not real happy about this, but we need to handle gimple and
+   non-gimple trees.  */
+#include "gimple.h"
+
+/* Inlining, Cloning, Versioning, Parallelization
+
+   Inlining: a function body is duplicated, but the PARM_DECLs are
+   remapped into VAR_DECLs, and non-void RETURN_EXPRs become
+   MODIFY_EXPRs that store to a dedicated returned-value variable.
+   The duplicated eh_region info of the copy will later be appended
+   to the info for the caller; the eh_region info in copied throwing
+   statements and RESX_EXPRs is adjusted accordingly.
+
+   Cloning: (only in C++) We have one body for a con/de/structor, and
+   multiple function decls, each with a unique parameter list.
+   Duplicate the body, using the given splay tree; some parameters
+   will become constants (like 0 or 1).
+
+   Versioning: a function body is duplicated and the result is a new
+   function rather than into blocks of an existing function as with
+   inlining.  Some parameters will become constants.
+
+   Parallelization: a region of a function is duplicated resulting in
+   a new function.  Variables may be replaced with complex expressions
+   to enable shared variable semantics.
+
+   All of these will simultaneously lookup any callgraph edges.  If
+   we're going to inline the duplicated function body, and the given
+   function has some cloned callgraph nodes (one for each place this
+   function will be inlined) those callgraph edges will be duplicated.
+   If we're cloning the body, those callgraph edges will be
+   updated to point into the new body.  (Note that the original
+   callgraph node and edge list will not be altered.)
+
+   See the CALL_EXPR handling case in copy_tree_body_r ().  */
+
+/* To Do:
+
+   o In order to make inlining-on-trees work, we pessimized
+     function-local static constants.  In particular, they are now
+     always output, even when not addressed.  Fix this by treating
+     function-local static constants just like global static
+     constants; the back-end already knows not to output them if they
+     are not needed.
+
+   o Provide heuristics to clamp inlining of recursive template
+     calls?  */
+
+
+/* Weights that estimate_num_insns uses for heuristics in inlining.  */
+
+eni_weights eni_inlining_weights;
+
+/* Weights that estimate_num_insns uses to estimate the size of the
+   produced code.  */
+
+eni_weights eni_size_weights;
+
+/* Weights that estimate_num_insns uses to estimate the time necessary
+   to execute the produced code.  */
+
+eni_weights eni_time_weights;
+
+/* Prototypes.  */
+
+static tree declare_return_variable (copy_body_data *, tree, tree, tree *);
+static bool inlinable_function_p (tree);
+static void remap_block (tree *, copy_body_data *);
+static void copy_bind_expr (tree *, int *, copy_body_data *);
+static tree mark_local_for_remap_r (tree *, int *, void *);
+static void unsave_expr_1 (tree);
+static tree unsave_r (tree *, int *, void *);
+static void declare_inline_vars (tree, tree);
+static void remap_save_expr (tree *, void *, int *);
+static void prepend_lexical_block (tree current_block, tree new_block);
+static tree copy_decl_to_var (tree, copy_body_data *);
+static tree copy_result_decl_to_var (tree, copy_body_data *);
+static tree copy_decl_maybe_to_var (tree, copy_body_data *);
+static gimple remap_gimple_stmt (gimple, copy_body_data *);
+
+/* Insert a tree->tree mapping for ID.  Despite the name suggests
+   that the trees should be variables, it is used for more than that.  */
+
+void
+insert_decl_map (copy_body_data *id, tree key, tree value)
+{
+  *pointer_map_insert (id->decl_map, key) = value;
+
+  /* Always insert an identity map as well.  If we see this same new
+     node again, we won't want to duplicate it a second time.  */
+  if (key != value)
+    *pointer_map_insert (id->decl_map, value) = value;
+}
+
+/* Construct new SSA name for old NAME. ID is the inline context.  */
+
+static tree
+remap_ssa_name (tree name, copy_body_data *id)
+{
+  tree new_tree;
+  tree *n;
+
+  gcc_assert (TREE_CODE (name) == SSA_NAME);
+
+  n = (tree *) pointer_map_contains (id->decl_map, name);
+  if (n)
+    return unshare_expr (*n);
+
+  /* Do not set DEF_STMT yet as statement is not copied yet. We do that
+     in copy_bb.  */
+  new_tree = remap_decl (SSA_NAME_VAR (name), id);
+
+  /* We might've substituted constant or another SSA_NAME for
+     the variable. 
+
+     Replace the SSA name representing RESULT_DECL by variable during
+     inlining:  this saves us from need to introduce PHI node in a case
+     return value is just partly initialized.  */
+  if ((TREE_CODE (new_tree) == VAR_DECL || TREE_CODE (new_tree) == PARM_DECL)
+      && (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL
+	  || !id->transform_return_to_modify))
+    {
+      new_tree = make_ssa_name (new_tree, NULL);
+      insert_decl_map (id, name, new_tree);
+      SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree)
+	= SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
+      TREE_TYPE (new_tree) = TREE_TYPE (SSA_NAME_VAR (new_tree));
+      if (gimple_nop_p (SSA_NAME_DEF_STMT (name)))
+	{
+	  /* By inlining function having uninitialized variable, we might
+	     extend the lifetime (variable might get reused).  This cause
+	     ICE in the case we end up extending lifetime of SSA name across
+	     abnormal edge, but also increase register pressure.
+
+	     We simply initialize all uninitialized vars by 0 except
+	     for case we are inlining to very first BB.  We can avoid
+	     this for all BBs that are not inside strongly connected
+	     regions of the CFG, but this is expensive to test.  */
+	  if (id->entry_bb
+	      && is_gimple_reg (SSA_NAME_VAR (name))
+	      && TREE_CODE (SSA_NAME_VAR (name)) != PARM_DECL
+	      && (id->entry_bb != EDGE_SUCC (ENTRY_BLOCK_PTR, 0)->dest
+		  || EDGE_COUNT (id->entry_bb->preds) != 1))
+	    {
+	      gimple_stmt_iterator gsi = gsi_last_bb (id->entry_bb);
+	      gimple init_stmt;
+	      
+	      init_stmt = gimple_build_assign (new_tree,
+		                               fold_convert (TREE_TYPE (new_tree),
+					       		    integer_zero_node));
+	      gsi_insert_after (&gsi, init_stmt, GSI_NEW_STMT);
+	      SSA_NAME_IS_DEFAULT_DEF (new_tree) = 0;
+	    }
+	  else
+	    {
+	      SSA_NAME_DEF_STMT (new_tree) = gimple_build_nop ();
+	      if (gimple_default_def (id->src_cfun, SSA_NAME_VAR (name))
+		  == name)
+	        set_default_def (SSA_NAME_VAR (new_tree), new_tree);
+	    }
+	}
+    }
+  else
+    insert_decl_map (id, name, new_tree);
+  return new_tree;
+}
+
+/* Remap DECL during the copying of the BLOCK tree for the function.  */
+
+tree
+remap_decl (tree decl, copy_body_data *id)
+{
+  tree *n;
+  tree fn;
+
+  /* We only remap local variables in the current function.  */
+  fn = id->src_fn;
+
+  /* See if we have remapped this declaration.  */
+
+  n = (tree *) pointer_map_contains (id->decl_map, decl);
+
+  /* If we didn't already have an equivalent for this declaration,
+     create one now.  */
+  if (!n)
+    {
+      /* Make a copy of the variable or label.  */
+      tree t = id->copy_decl (decl, id);
+     
+      /* Remember it, so that if we encounter this local entity again
+	 we can reuse this copy.  Do this early because remap_type may
+	 need this decl for TYPE_STUB_DECL.  */
+      insert_decl_map (id, decl, t);
+
+      if (!DECL_P (t))
+	return t;
+
+      /* Remap types, if necessary.  */
+      TREE_TYPE (t) = remap_type (TREE_TYPE (t), id);
+      if (TREE_CODE (t) == TYPE_DECL)
+        DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id);
+
+      /* Remap sizes as necessary.  */
+      walk_tree (&DECL_SIZE (t), copy_tree_body_r, id, NULL);
+      walk_tree (&DECL_SIZE_UNIT (t), copy_tree_body_r, id, NULL);
+
+      /* If fields, do likewise for offset and qualifier.  */
+      if (TREE_CODE (t) == FIELD_DECL)
+	{
+	  walk_tree (&DECL_FIELD_OFFSET (t), copy_tree_body_r, id, NULL);
+	  if (TREE_CODE (DECL_CONTEXT (t)) == QUAL_UNION_TYPE)
+	    walk_tree (&DECL_QUALIFIER (t), copy_tree_body_r, id, NULL);
+	}
+
+      if (cfun && gimple_in_ssa_p (cfun)
+	  && (TREE_CODE (t) == VAR_DECL
+	      || TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL))
+	{
+          tree def = gimple_default_def (id->src_cfun, decl);
+	  get_var_ann (t);
+	  if (TREE_CODE (decl) != PARM_DECL && def)
+	    {
+	      tree map = remap_ssa_name (def, id);
+	      /* Watch out RESULT_DECLs whose SSA names map directly
+		 to them.  */
+	      if (TREE_CODE (map) == SSA_NAME
+		  && gimple_nop_p (SSA_NAME_DEF_STMT (map)))
+	        set_default_def (t, map);
+	    }
+	  add_referenced_var (t);
+	}
+      return t;
+    }
+
+  return unshare_expr (*n);
+}
+
+static tree
+remap_type_1 (tree type, copy_body_data *id)
+{
+  tree new_tree, t;
+
+  /* We do need a copy.  build and register it now.  If this is a pointer or
+     reference type, remap the designated type and make a new pointer or
+     reference type.  */
+  if (TREE_CODE (type) == POINTER_TYPE)
+    {
+      new_tree = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id),
+					 TYPE_MODE (type),
+					 TYPE_REF_CAN_ALIAS_ALL (type));
+      insert_decl_map (id, type, new_tree);
+      return new_tree;
+    }
+  else if (TREE_CODE (type) == REFERENCE_TYPE)
+    {
+      new_tree = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id),
+					    TYPE_MODE (type),
+					    TYPE_REF_CAN_ALIAS_ALL (type));
+      insert_decl_map (id, type, new_tree);
+      return new_tree;
+    }
+  else
+    new_tree = copy_node (type);
+
+  insert_decl_map (id, type, new_tree);
+
+  /* This is a new type, not a copy of an old type.  Need to reassociate
+     variants.  We can handle everything except the main variant lazily.  */
+  t = TYPE_MAIN_VARIANT (type);
+  if (type != t)
+    {
+      t = remap_type (t, id);
+      TYPE_MAIN_VARIANT (new_tree) = t;
+      TYPE_NEXT_VARIANT (new_tree) = TYPE_NEXT_VARIANT (t);
+      TYPE_NEXT_VARIANT (t) = new_tree;
+    }
+  else
+    {
+      TYPE_MAIN_VARIANT (new_tree) = new_tree;
+      TYPE_NEXT_VARIANT (new_tree) = NULL;
+    }
+
+  if (TYPE_STUB_DECL (type))
+    TYPE_STUB_DECL (new_tree) = remap_decl (TYPE_STUB_DECL (type), id);
+
+  /* Lazily create pointer and reference types.  */
+  TYPE_POINTER_TO (new_tree) = NULL;
+  TYPE_REFERENCE_TO (new_tree) = NULL;
+
+  switch (TREE_CODE (new_tree))
+    {
+    case INTEGER_TYPE:
+    case REAL_TYPE:
+    case FIXED_POINT_TYPE:
+    case ENUMERAL_TYPE:
+    case BOOLEAN_TYPE:
+      t = TYPE_MIN_VALUE (new_tree);
+      if (t && TREE_CODE (t) != INTEGER_CST)
+        walk_tree (&TYPE_MIN_VALUE (new_tree), copy_tree_body_r, id, NULL);
+
+      t = TYPE_MAX_VALUE (new_tree);
+      if (t && TREE_CODE (t) != INTEGER_CST)
+        walk_tree (&TYPE_MAX_VALUE (new_tree), copy_tree_body_r, id, NULL);
+      return new_tree;
+
+    case FUNCTION_TYPE:
+      TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
+      walk_tree (&TYPE_ARG_TYPES (new_tree), copy_tree_body_r, id, NULL);
+      return new_tree;
+
+    case ARRAY_TYPE:
+      TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
+      TYPE_DOMAIN (new_tree) = remap_type (TYPE_DOMAIN (new_tree), id);
+      break;
+
+    case RECORD_TYPE:
+    case UNION_TYPE:
+    case QUAL_UNION_TYPE:
+      {
+	tree f, nf = NULL;
+
+	for (f = TYPE_FIELDS (new_tree); f ; f = TREE_CHAIN (f))
+	  {
+	    t = remap_decl (f, id);
+	    DECL_CONTEXT (t) = new_tree;
+	    TREE_CHAIN (t) = nf;
+	    nf = t;
+	  }
+	TYPE_FIELDS (new_tree) = nreverse (nf);
+      }
+      break;
+
+    case OFFSET_TYPE:
+    default:
+      /* Shouldn't have been thought variable sized.  */
+      gcc_unreachable ();
+    }
+
+  walk_tree (&TYPE_SIZE (new_tree), copy_tree_body_r, id, NULL);
+  walk_tree (&TYPE_SIZE_UNIT (new_tree), copy_tree_body_r, id, NULL);
+
+  return new_tree;
+}
+
+tree
+remap_type (tree type, copy_body_data *id)
+{
+  tree *node;
+  tree tmp;
+
+  if (type == NULL)
+    return type;
+
+  /* See if we have remapped this type.  */
+  node = (tree *) pointer_map_contains (id->decl_map, type);
+  if (node)
+    return *node;
+
+  /* The type only needs remapping if it's variably modified.  */
+  if (! variably_modified_type_p (type, id->src_fn))
+    {
+      insert_decl_map (id, type, type);
+      return type;
+    }
+
+  id->remapping_type_depth++;
+  tmp = remap_type_1 (type, id);
+  id->remapping_type_depth--;
+
+  return tmp;
+}
+
+/* Return previously remapped type of TYPE in ID.  Return NULL if TYPE
+   is NULL or TYPE has not been remapped before.  */
+
+static tree
+remapped_type (tree type, copy_body_data *id)
+{
+  tree *node;
+
+  if (type == NULL)
+    return type;
+
+  /* See if we have remapped this type.  */
+  node = (tree *) pointer_map_contains (id->decl_map, type);
+  if (node)
+    return *node;
+  else
+    return NULL;
+}
+
+  /* The type only needs remapping if it's variably modified.  */
+/* Decide if DECL can be put into BLOCK_NONLOCAL_VARs.  */
+  
+static bool
+can_be_nonlocal (tree decl, copy_body_data *id)
+{
+  /* We can not duplicate function decls.  */
+  if (TREE_CODE (decl) == FUNCTION_DECL)
+    return true;
+
+  /* Local static vars must be non-local or we get multiple declaration
+     problems.  */
+  if (TREE_CODE (decl) == VAR_DECL
+      && !auto_var_in_fn_p (decl, id->src_fn))
+    return true;
+
+  /* At the moment dwarf2out can handle only these types of nodes.  We
+     can support more later.  */
+  if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
+    return false;
+
+  /* We must use global type.  We call remapped_type instead of
+     remap_type since we don't want to remap this type here if it
+     hasn't been remapped before.  */
+  if (TREE_TYPE (decl) != remapped_type (TREE_TYPE (decl), id))
+    return false;
+
+  /* Wihtout SSA we can't tell if variable is used.  */
+  if (!gimple_in_ssa_p (cfun))
+    return false;
+
+  /* Live variables must be copied so we can attach DECL_RTL.  */
+  if (var_ann (decl))
+    return false;
+
+  return true;
+}
+
+static tree
+remap_decls (tree decls, VEC(tree,gc) **nonlocalized_list, copy_body_data *id)
+{
+  tree old_var;
+  tree new_decls = NULL_TREE;
+
+  /* Remap its variables.  */
+  for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var))
+    {
+      tree new_var;
+      tree origin_var = DECL_ORIGIN (old_var);
+
+      if (can_be_nonlocal (old_var, id))
+	{
+	  if (TREE_CODE (old_var) == VAR_DECL
+	      && (var_ann (old_var) || !gimple_in_ssa_p (cfun)))
+	    cfun->local_decls = tree_cons (NULL_TREE, old_var,
+						   cfun->local_decls);
+	  if (debug_info_level > DINFO_LEVEL_TERSE
+	      && !DECL_IGNORED_P (old_var)
+	      && nonlocalized_list)
+	    VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
+	  continue;
+	}
+
+      /* Remap the variable.  */
+      new_var = remap_decl (old_var, id);
+
+      /* If we didn't remap this variable, we can't mess with its
+	 TREE_CHAIN.  If we remapped this variable to the return slot, it's
+	 already declared somewhere else, so don't declare it here.  */
+      
+      if (new_var == id->retvar)
+	;
+      else if (!new_var)
+        {
+	  if (debug_info_level > DINFO_LEVEL_TERSE
+	      && !DECL_IGNORED_P (old_var)
+	      && nonlocalized_list)
+	    VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
+	}
+      else
+	{
+	  gcc_assert (DECL_P (new_var));
+	  TREE_CHAIN (new_var) = new_decls;
+	  new_decls = new_var;
+	}
+    }
+
+  return nreverse (new_decls);
+}
+
+/* Copy the BLOCK to contain remapped versions of the variables
+   therein.  And hook the new block into the block-tree.  */
+
+static void
+remap_block (tree *block, copy_body_data *id)
+{
+  tree old_block;
+  tree new_block;
+  tree fn;
+
+  /* Make the new block.  */
+  old_block = *block;
+  new_block = make_node (BLOCK);
+  TREE_USED (new_block) = TREE_USED (old_block);
+  BLOCK_ABSTRACT_ORIGIN (new_block) = old_block;
+  BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block);
+  BLOCK_NONLOCALIZED_VARS (new_block)
+    = VEC_copy (tree, gc, BLOCK_NONLOCALIZED_VARS (old_block));
+  *block = new_block;
+
+  /* Remap its variables.  */
+  BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block),
+  					&BLOCK_NONLOCALIZED_VARS (new_block),
+					id);
+
+  fn = id->dst_fn;
+
+  if (id->transform_lang_insert_block)
+    id->transform_lang_insert_block (new_block);
+
+  /* Remember the remapped block.  */
+  insert_decl_map (id, old_block, new_block);
+}
+
+/* Copy the whole block tree and root it in id->block.  */
+static tree
+remap_blocks (tree block, copy_body_data *id)
+{
+  tree t;
+  tree new_tree = block;
+
+  if (!block)
+    return NULL;
+
+  remap_block (&new_tree, id);
+  gcc_assert (new_tree != block);
+  for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
+    prepend_lexical_block (new_tree, remap_blocks (t, id));
+  /* Blocks are in arbitrary order, but make things slightly prettier and do
+     not swap order when producing a copy.  */
+  BLOCK_SUBBLOCKS (new_tree) = blocks_nreverse (BLOCK_SUBBLOCKS (new_tree));
+  return new_tree;
+}
+
+static void
+copy_statement_list (tree *tp)
+{
+  tree_stmt_iterator oi, ni;
+  tree new_tree;
+
+  new_tree = alloc_stmt_list ();
+  ni = tsi_start (new_tree);
+  oi = tsi_start (*tp);
+  *tp = new_tree;
+
+  for (; !tsi_end_p (oi); tsi_next (&oi))
+    tsi_link_after (&ni, tsi_stmt (oi), TSI_NEW_STMT);
+}
+
+static void
+copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id)
+{
+  tree block = BIND_EXPR_BLOCK (*tp);
+  /* Copy (and replace) the statement.  */
+  copy_tree_r (tp, walk_subtrees, NULL);
+  if (block)
+    {
+      remap_block (&block, id);
+      BIND_EXPR_BLOCK (*tp) = block;
+    }
+
+  if (BIND_EXPR_VARS (*tp))
+    /* This will remap a lot of the same decls again, but this should be
+       harmless.  */
+    BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), NULL, id);
+}
+
+
+/* Create a new gimple_seq by remapping all the statements in BODY
+   using the inlining information in ID.  */
+
+gimple_seq
+remap_gimple_seq (gimple_seq body, copy_body_data *id)
+{
+  gimple_stmt_iterator si;
+  gimple_seq new_body = NULL;
+
+  for (si = gsi_start (body); !gsi_end_p (si); gsi_next (&si))
+    {
+      gimple new_stmt = remap_gimple_stmt (gsi_stmt (si), id);
+      gimple_seq_add_stmt (&new_body, new_stmt);
+    }
+
+  return new_body;
+}
+
+
+/* Copy a GIMPLE_BIND statement STMT, remapping all the symbols in its
+   block using the mapping information in ID.  */
+
+static gimple
+copy_gimple_bind (gimple stmt, copy_body_data *id)
+{
+  gimple new_bind;
+  tree new_block, new_vars;
+  gimple_seq body, new_body;
+
+  /* Copy the statement.  Note that we purposely don't use copy_stmt
+     here because we need to remap statements as we copy.  */
+  body = gimple_bind_body (stmt);
+  new_body = remap_gimple_seq (body, id);
+
+  new_block = gimple_bind_block (stmt);
+  if (new_block)
+    remap_block (&new_block, id);
+
+  /* This will remap a lot of the same decls again, but this should be
+     harmless.  */
+  new_vars = gimple_bind_vars (stmt);
+  if (new_vars)
+    new_vars = remap_decls (new_vars, NULL, id);
+
+  new_bind = gimple_build_bind (new_vars, new_body, new_block);
+
+  return new_bind;
+}
+
+
+/* Remap the GIMPLE operand pointed to by *TP.  DATA is really a
+   'struct walk_stmt_info *'.  DATA->INFO is a 'copy_body_data *'.
+   WALK_SUBTREES is used to indicate walk_gimple_op whether to keep
+   recursing into the children nodes of *TP.  */
+
+static tree
+remap_gimple_op_r (tree *tp, int *walk_subtrees, void *data)
+{
+  struct walk_stmt_info *wi_p = (struct walk_stmt_info *) data;
+  copy_body_data *id = (copy_body_data *) wi_p->info;
+  tree fn = id->src_fn;
+
+  if (TREE_CODE (*tp) == SSA_NAME)
+    {
+      *tp = remap_ssa_name (*tp, id);
+      *walk_subtrees = 0;
+      return NULL;
+    }
+  else if (auto_var_in_fn_p (*tp, fn))
+    {
+      /* Local variables and labels need to be replaced by equivalent
+	 variables.  We don't want to copy static variables; there's
+	 only one of those, no matter how many times we inline the
+	 containing function.  Similarly for globals from an outer
+	 function.  */
+      tree new_decl;
+
+      /* Remap the declaration.  */
+      new_decl = remap_decl (*tp, id);
+      gcc_assert (new_decl);
+      /* Replace this variable with the copy.  */
+      STRIP_TYPE_NOPS (new_decl);
+      *tp = new_decl;
+      *walk_subtrees = 0;
+    }
+  else if (TREE_CODE (*tp) == STATEMENT_LIST)
+    gcc_unreachable ();
+  else if (TREE_CODE (*tp) == SAVE_EXPR)
+    gcc_unreachable ();
+  else if (TREE_CODE (*tp) == LABEL_DECL
+	   && (!DECL_CONTEXT (*tp)
+	       || decl_function_context (*tp) == id->src_fn))
+    /* These may need to be remapped for EH handling.  */
+    *tp = remap_decl (*tp, id);
+  else if (TYPE_P (*tp))
+    /* Types may need remapping as well.  */
+    *tp = remap_type (*tp, id);
+  else if (CONSTANT_CLASS_P (*tp))
+    {
+      /* If this is a constant, we have to copy the node iff the type
+	 will be remapped.  copy_tree_r will not copy a constant.  */
+      tree new_type = remap_type (TREE_TYPE (*tp), id);
+
+      if (new_type == TREE_TYPE (*tp))
+	*walk_subtrees = 0;
+
+      else if (TREE_CODE (*tp) == INTEGER_CST)
+	*tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
+				  TREE_INT_CST_HIGH (*tp));
+      else
+	{
+	  *tp = copy_node (*tp);
+	  TREE_TYPE (*tp) = new_type;
+	}
+    }
+  else
+    {
+      /* Otherwise, just copy the node.  Note that copy_tree_r already
+	 knows not to copy VAR_DECLs, etc., so this is safe.  */
+      if (TREE_CODE (*tp) == INDIRECT_REF)
+	{
+	  /* Get rid of *& from inline substitutions that can happen when a
+	     pointer argument is an ADDR_EXPR.  */
+	  tree decl = TREE_OPERAND (*tp, 0);
+	  tree *n;
+
+	  n = (tree *) pointer_map_contains (id->decl_map, decl);
+	  if (n)
+	    {
+	      tree type, new_tree, old;
+
+	      /* If we happen to get an ADDR_EXPR in n->value, strip
+		 it manually here as we'll eventually get ADDR_EXPRs
+		 which lie about their types pointed to.  In this case
+		 build_fold_indirect_ref wouldn't strip the
+		 INDIRECT_REF, but we absolutely rely on that.  As
+		 fold_indirect_ref does other useful transformations,
+		 try that first, though.  */
+	      type = TREE_TYPE (TREE_TYPE (*n));
+	      new_tree = unshare_expr (*n);
+	      old = *tp;
+	      *tp = gimple_fold_indirect_ref (new_tree);
+	      if (!*tp)
+	        {
+		  if (TREE_CODE (new_tree) == ADDR_EXPR)
+		    {
+		      *tp = fold_indirect_ref_1 (type, new_tree);
+		      /* ???  We should either assert here or build
+			 a VIEW_CONVERT_EXPR instead of blindly leaking
+			 incompatible types to our IL.  */
+		      if (! *tp)
+			*tp = TREE_OPERAND (new_tree, 0);
+		    }
+	          else
+		    {
+	              *tp = build1 (INDIRECT_REF, type, new_tree);
+		      TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
+		      TREE_NO_WARNING (*tp) = TREE_NO_WARNING (old);
+		    }
+		}
+	      *walk_subtrees = 0;
+	      return NULL;
+	    }
+	}
+
+      /* Here is the "usual case".  Copy this tree node, and then
+	 tweak some special cases.  */
+      copy_tree_r (tp, walk_subtrees, NULL);
+
+      /* Global variables we haven't seen yet need to go into referenced
+	 vars.  If not referenced from types only.  */
+      if (gimple_in_ssa_p (cfun)
+	  && TREE_CODE (*tp) == VAR_DECL
+	  && id->remapping_type_depth == 0)
+	add_referenced_var (*tp);
+
+      /* We should never have TREE_BLOCK set on non-statements.  */
+      if (EXPR_P (*tp))
+	gcc_assert (!TREE_BLOCK (*tp));
+
+      if (TREE_CODE (*tp) != OMP_CLAUSE)
+	TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
+
+      if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
+	{
+	  /* The copied TARGET_EXPR has never been expanded, even if the
+	     original node was expanded already.  */
+	  TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
+	  TREE_OPERAND (*tp, 3) = NULL_TREE;
+	}
+      else if (TREE_CODE (*tp) == ADDR_EXPR)
+	{
+	  /* Variable substitution need not be simple.  In particular,
+	     the INDIRECT_REF substitution above.  Make sure that
+	     TREE_CONSTANT and friends are up-to-date.  But make sure
+	     to not improperly set TREE_BLOCK on some sub-expressions.  */
+	  int invariant = is_gimple_min_invariant (*tp);
+	  tree block = id->block;
+	  id->block = NULL_TREE;
+	  walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
+	  id->block = block;
+
+	  /* Handle the case where we substituted an INDIRECT_REF
+	     into the operand of the ADDR_EXPR.  */
+	  if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
+	    *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
+	  else
+	    recompute_tree_invariant_for_addr_expr (*tp);
+
+	  /* If this used to be invariant, but is not any longer,
+	     then regimplification is probably needed.  */
+	  if (invariant && !is_gimple_min_invariant (*tp))
+	    id->regimplify = true;
+
+	  *walk_subtrees = 0;
+	}
+    }
+
+  /* Keep iterating.  */
+  return NULL_TREE;
+}
+
+
+/* Called from copy_body_id via walk_tree.  DATA is really a
+   `copy_body_data *'.  */
+
+tree
+copy_tree_body_r (tree *tp, int *walk_subtrees, void *data)
+{
+  copy_body_data *id = (copy_body_data *) data;
+  tree fn = id->src_fn;
+  tree new_block;
+
+  /* Begin by recognizing trees that we'll completely rewrite for the
+     inlining context.  Our output for these trees is completely
+     different from out input (e.g. RETURN_EXPR is deleted, and morphs
+     into an edge).  Further down, we'll handle trees that get
+     duplicated and/or tweaked.  */
+
+  /* When requested, RETURN_EXPRs should be transformed to just the
+     contained MODIFY_EXPR.  The branch semantics of the return will
+     be handled elsewhere by manipulating the CFG rather than a statement.  */
+  if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify)
+    {
+      tree assignment = TREE_OPERAND (*tp, 0);
+
+      /* If we're returning something, just turn that into an
+	 assignment into the equivalent of the original RESULT_DECL.
+	 If the "assignment" is just the result decl, the result
+	 decl has already been set (e.g. a recent "foo (&result_decl,
+	 ...)"); just toss the entire RETURN_EXPR.  */
+      if (assignment && TREE_CODE (assignment) == MODIFY_EXPR)
+	{
+	  /* Replace the RETURN_EXPR with (a copy of) the
+	     MODIFY_EXPR hanging underneath.  */
+	  *tp = copy_node (assignment);
+	}
+      else /* Else the RETURN_EXPR returns no value.  */
+	{
+	  *tp = NULL;
+	  return (tree) (void *)1;
+	}
+    }
+  else if (TREE_CODE (*tp) == SSA_NAME)
+    {
+      *tp = remap_ssa_name (*tp, id);
+      *walk_subtrees = 0;
+      return NULL;
+    }
+
+  /* Local variables and labels need to be replaced by equivalent
+     variables.  We don't want to copy static variables; there's only
+     one of those, no matter how many times we inline the containing
+     function.  Similarly for globals from an outer function.  */
+  else if (auto_var_in_fn_p (*tp, fn))
+    {
+      tree new_decl;
+
+      /* Remap the declaration.  */
+      new_decl = remap_decl (*tp, id);
+      gcc_assert (new_decl);
+      /* Replace this variable with the copy.  */
+      STRIP_TYPE_NOPS (new_decl);
+      *tp = new_decl;
+      *walk_subtrees = 0;
+    }
+  else if (TREE_CODE (*tp) == STATEMENT_LIST)
+    copy_statement_list (tp);
+  else if (TREE_CODE (*tp) == SAVE_EXPR)
+    remap_save_expr (tp, id->decl_map, walk_subtrees);
+  else if (TREE_CODE (*tp) == LABEL_DECL
+	   && (! DECL_CONTEXT (*tp)
+	       || decl_function_context (*tp) == id->src_fn))
+    /* These may need to be remapped for EH handling.  */
+    *tp = remap_decl (*tp, id);
+  else if (TREE_CODE (*tp) == BIND_EXPR)
+    copy_bind_expr (tp, walk_subtrees, id);
+  /* Types may need remapping as well.  */
+  else if (TYPE_P (*tp))
+    *tp = remap_type (*tp, id);
+
+  /* If this is a constant, we have to copy the node iff the type will be
+     remapped.  copy_tree_r will not copy a constant.  */
+  else if (CONSTANT_CLASS_P (*tp))
+    {
+      tree new_type = remap_type (TREE_TYPE (*tp), id);
+
+      if (new_type == TREE_TYPE (*tp))
+	*walk_subtrees = 0;
+
+      else if (TREE_CODE (*tp) == INTEGER_CST)
+	*tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
+				  TREE_INT_CST_HIGH (*tp));
+      else
+	{
+	  *tp = copy_node (*tp);
+	  TREE_TYPE (*tp) = new_type;
+	}
+    }
+
+  /* Otherwise, just copy the node.  Note that copy_tree_r already
+     knows not to copy VAR_DECLs, etc., so this is safe.  */
+  else
+    {
+      /* Here we handle trees that are not completely rewritten.
+	 First we detect some inlining-induced bogosities for
+	 discarding.  */
+      if (TREE_CODE (*tp) == MODIFY_EXPR
+	  && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
+	  && (auto_var_in_fn_p (TREE_OPERAND (*tp, 0), fn)))
+	{
+	  /* Some assignments VAR = VAR; don't generate any rtl code
+	     and thus don't count as variable modification.  Avoid
+	     keeping bogosities like 0 = 0.  */
+	  tree decl = TREE_OPERAND (*tp, 0), value;
+	  tree *n;
+
+	  n = (tree *) pointer_map_contains (id->decl_map, decl);
+	  if (n)
+	    {
+	      value = *n;
+	      STRIP_TYPE_NOPS (value);
+	      if (TREE_CONSTANT (value) || TREE_READONLY (value))
+		{
+		  *tp = build_empty_stmt ();
+		  return copy_tree_body_r (tp, walk_subtrees, data);
+		}
+	    }
+	}
+      else if (TREE_CODE (*tp) == INDIRECT_REF)
+	{
+	  /* Get rid of *& from inline substitutions that can happen when a
+	     pointer argument is an ADDR_EXPR.  */
+	  tree decl = TREE_OPERAND (*tp, 0);
+	  tree *n;
+
+	  n = (tree *) pointer_map_contains (id->decl_map, decl);
+	  if (n)
+	    {
+	      tree new_tree;
+	      tree old;
+	      /* If we happen to get an ADDR_EXPR in n->value, strip
+	         it manually here as we'll eventually get ADDR_EXPRs
+		 which lie about their types pointed to.  In this case
+		 build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
+		 but we absolutely rely on that.  As fold_indirect_ref
+	         does other useful transformations, try that first, though.  */
+	      tree type = TREE_TYPE (TREE_TYPE (*n));
+	      new_tree = unshare_expr (*n);
+	      old = *tp;
+	      *tp = gimple_fold_indirect_ref (new_tree);
+	      if (! *tp)
+	        {
+		  if (TREE_CODE (new_tree) == ADDR_EXPR)
+		    {
+		      *tp = fold_indirect_ref_1 (type, new_tree);
+		      /* ???  We should either assert here or build
+			 a VIEW_CONVERT_EXPR instead of blindly leaking
+			 incompatible types to our IL.  */
+		      if (! *tp)
+			*tp = TREE_OPERAND (new_tree, 0);
+		    }
+	          else
+		    {
+	              *tp = build1 (INDIRECT_REF, type, new_tree);
+		      TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
+		      TREE_SIDE_EFFECTS (*tp) = TREE_SIDE_EFFECTS (old);
+		    }
+		}
+	      *walk_subtrees = 0;
+	      return NULL;
+	    }
+	}
+
+      /* Here is the "usual case".  Copy this tree node, and then
+	 tweak some special cases.  */
+      copy_tree_r (tp, walk_subtrees, NULL);
+
+      /* Global variables we haven't seen yet needs to go into referenced
+	 vars.  If not referenced from types only.  */
+      if (gimple_in_ssa_p (cfun)
+	  && TREE_CODE (*tp) == VAR_DECL
+	  && id->remapping_type_depth == 0)
+	add_referenced_var (*tp);
+       
+      /* If EXPR has block defined, map it to newly constructed block.
+         When inlining we want EXPRs without block appear in the block
+	 of function call.  */
+      if (EXPR_P (*tp))
+	{
+	  new_block = id->block;
+	  if (TREE_BLOCK (*tp))
+	    {
+	      tree *n;
+	      n = (tree *) pointer_map_contains (id->decl_map,
+						 TREE_BLOCK (*tp));
+	      gcc_assert (n);
+	      new_block = *n;
+	    }
+	  TREE_BLOCK (*tp) = new_block;
+	}
+
+      if (TREE_CODE (*tp) == RESX_EXPR && id->eh_region_offset)
+	TREE_OPERAND (*tp, 0) =
+	  build_int_cst (NULL_TREE,
+			 id->eh_region_offset
+			 + TREE_INT_CST_LOW (TREE_OPERAND (*tp, 0)));
+
+      if (TREE_CODE (*tp) != OMP_CLAUSE)
+	TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
+
+      /* The copied TARGET_EXPR has never been expanded, even if the
+	 original node was expanded already.  */
+      if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
+	{
+	  TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
+	  TREE_OPERAND (*tp, 3) = NULL_TREE;
+	}
+
+      /* Variable substitution need not be simple.  In particular, the
+	 INDIRECT_REF substitution above.  Make sure that TREE_CONSTANT
+	 and friends are up-to-date.  */
+      else if (TREE_CODE (*tp) == ADDR_EXPR)
+	{
+	  int invariant = is_gimple_min_invariant (*tp);
+	  walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
+
+	  /* Handle the case where we substituted an INDIRECT_REF
+	     into the operand of the ADDR_EXPR.  */
+	  if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
+	    *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
+	  else
+	    recompute_tree_invariant_for_addr_expr (*tp);
+
+	  /* If this used to be invariant, but is not any longer,
+	     then regimplification is probably needed.  */
+	  if (invariant && !is_gimple_min_invariant (*tp))
+	    id->regimplify = true;
+
+	  *walk_subtrees = 0;
+	}
+    }
+
+  /* Keep iterating.  */
+  return NULL_TREE;
+}
+
+
+/* Helper for copy_bb.  Remap statement STMT using the inlining
+   information in ID.  Return the new statement copy.  */
+
+static gimple
+remap_gimple_stmt (gimple stmt, copy_body_data *id)
+{
+  gimple copy = NULL;
+  struct walk_stmt_info wi;
+  tree new_block;
+  bool skip_first = false;
+
+  /* Begin by recognizing trees that we'll completely rewrite for the
+     inlining context.  Our output for these trees is completely
+     different from out input (e.g. RETURN_EXPR is deleted, and morphs
+     into an edge).  Further down, we'll handle trees that get
+     duplicated and/or tweaked.  */
+
+  /* When requested, GIMPLE_RETURNs should be transformed to just the
+     contained GIMPLE_ASSIGN.  The branch semantics of the return will
+     be handled elsewhere by manipulating the CFG rather than the
+     statement.  */
+  if (gimple_code (stmt) == GIMPLE_RETURN && id->transform_return_to_modify)
+    {
+      tree retval = gimple_return_retval (stmt);
+
+      /* If we're returning something, just turn that into an
+	 assignment into the equivalent of the original RESULT_DECL.
+	 If RETVAL is just the result decl, the result decl has
+	 already been set (e.g. a recent "foo (&result_decl, ...)");
+	 just toss the entire GIMPLE_RETURN.  */
+      if (retval && TREE_CODE (retval) != RESULT_DECL)
+        {
+	  copy = gimple_build_assign (id->retvar, retval);
+	  /* id->retvar is already substituted.  Skip it on later remapping.  */
+	  skip_first = true;
+	}
+      else
+	return gimple_build_nop ();
+    }
+  else if (gimple_has_substatements (stmt))
+    {
+      gimple_seq s1, s2;
+
+      /* When cloning bodies from the C++ front end, we will be handed bodies
+	 in High GIMPLE form.  Handle here all the High GIMPLE statements that
+	 have embedded statements.  */
+      switch (gimple_code (stmt))
+	{
+	case GIMPLE_BIND:
+	  copy = copy_gimple_bind (stmt, id);
+	  break;
+
+	case GIMPLE_CATCH:
+	  s1 = remap_gimple_seq (gimple_catch_handler (stmt), id);
+	  copy = gimple_build_catch (gimple_catch_types (stmt), s1);
+	  break;
+
+	case GIMPLE_EH_FILTER:
+	  s1 = remap_gimple_seq (gimple_eh_filter_failure (stmt), id);
+	  copy = gimple_build_eh_filter (gimple_eh_filter_types (stmt), s1);
+	  break;
+
+	case GIMPLE_TRY:
+	  s1 = remap_gimple_seq (gimple_try_eval (stmt), id);
+	  s2 = remap_gimple_seq (gimple_try_cleanup (stmt), id);
+	  copy = gimple_build_try (s1, s2, gimple_try_kind (stmt)); 
+	  break;
+
+	case GIMPLE_WITH_CLEANUP_EXPR:
+	  s1 = remap_gimple_seq (gimple_wce_cleanup (stmt), id);
+	  copy = gimple_build_wce (s1);
+	  break;
+
+	case GIMPLE_OMP_PARALLEL:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_parallel
+	           (s1,
+		    gimple_omp_parallel_clauses (stmt),
+		    gimple_omp_parallel_child_fn (stmt),
+		    gimple_omp_parallel_data_arg (stmt));
+	  break;
+
+	case GIMPLE_OMP_TASK:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_task
+	           (s1,
+		    gimple_omp_task_clauses (stmt),
+		    gimple_omp_task_child_fn (stmt),
+		    gimple_omp_task_data_arg (stmt),
+		    gimple_omp_task_copy_fn (stmt),
+		    gimple_omp_task_arg_size (stmt),
+		    gimple_omp_task_arg_align (stmt));
+	  break;
+
+	case GIMPLE_OMP_FOR:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  s2 = remap_gimple_seq (gimple_omp_for_pre_body (stmt), id);
+	  copy = gimple_build_omp_for (s1, gimple_omp_for_clauses (stmt),
+				       gimple_omp_for_collapse (stmt), s2);
+	  {
+	    size_t i;
+	    for (i = 0; i < gimple_omp_for_collapse (stmt); i++)
+	      {
+		gimple_omp_for_set_index (copy, i,
+					  gimple_omp_for_index (stmt, i));
+		gimple_omp_for_set_initial (copy, i,
+					    gimple_omp_for_initial (stmt, i));
+		gimple_omp_for_set_final (copy, i,
+					  gimple_omp_for_final (stmt, i));
+		gimple_omp_for_set_incr (copy, i,
+					 gimple_omp_for_incr (stmt, i));
+		gimple_omp_for_set_cond (copy, i,
+					 gimple_omp_for_cond (stmt, i));
+	      }
+	  }
+	  break;
+
+	case GIMPLE_OMP_MASTER:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_master (s1);
+	  break;
+
+	case GIMPLE_OMP_ORDERED:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_ordered (s1);
+	  break;
+
+	case GIMPLE_OMP_SECTION:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_section (s1);
+	  break;
+
+	case GIMPLE_OMP_SECTIONS:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_sections
+	           (s1, gimple_omp_sections_clauses (stmt));
+	  break;
+
+	case GIMPLE_OMP_SINGLE:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy = gimple_build_omp_single
+	           (s1, gimple_omp_single_clauses (stmt));
+	  break;
+
+	case GIMPLE_OMP_CRITICAL:
+	  s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
+	  copy
+	    = gimple_build_omp_critical (s1, gimple_omp_critical_name (stmt));
+	  break;
+
+	default:
+	  gcc_unreachable ();
+	}
+    }
+  else
+    {
+      if (gimple_assign_copy_p (stmt)
+	  && gimple_assign_lhs (stmt) == gimple_assign_rhs1 (stmt)
+	  && auto_var_in_fn_p (gimple_assign_lhs (stmt), id->src_fn))
+	{
+	  /* Here we handle statements that are not completely rewritten.
+	     First we detect some inlining-induced bogosities for
+	     discarding.  */
+
+	  /* Some assignments VAR = VAR; don't generate any rtl code
+	     and thus don't count as variable modification.  Avoid
+	     keeping bogosities like 0 = 0.  */
+	  tree decl = gimple_assign_lhs (stmt), value;
+	  tree *n;
+
+	  n = (tree *) pointer_map_contains (id->decl_map, decl);
+	  if (n)
+	    {
+	      value = *n;
+	      STRIP_TYPE_NOPS (value);
+	      if (TREE_CONSTANT (value) || TREE_READONLY (value))
+		return gimple_build_nop ();
+	    }
+	}
+
+      /* Create a new deep copy of the statement.  */
+      copy = gimple_copy (stmt);
+    }
+
+  /* If STMT has a block defined, map it to the newly constructed
+     block.  When inlining we want statements without a block to
+     appear in the block of the function call.  */
+  new_block = id->block;
+  if (gimple_block (copy))
+    {
+      tree *n;
+      n = (tree *) pointer_map_contains (id->decl_map, gimple_block (copy));
+      gcc_assert (n);
+      new_block = *n;
+    }
+
+  gimple_set_block (copy, new_block);
+
+  /* Remap all the operands in COPY.  */
+  memset (&wi, 0, sizeof (wi));
+  wi.info = id;
+  if (skip_first)
+    walk_tree (gimple_op_ptr (copy, 1), remap_gimple_op_r, &wi, NULL);
+  else
+    walk_gimple_op (copy, remap_gimple_op_r, &wi); 
+
+  /* We have to handle EH region remapping of GIMPLE_RESX specially because
+     the region number is not an operand.  */
+  if (gimple_code (stmt) == GIMPLE_RESX && id->eh_region_offset)
+    {
+      gimple_resx_set_region (copy, gimple_resx_region (stmt) + id->eh_region_offset);
+    }
+  return copy;
+}
+
+
+/* Copy basic block, scale profile accordingly.  Edges will be taken care of
+   later  */
+
+static basic_block
+copy_bb (copy_body_data *id, basic_block bb, int frequency_scale,
+         gcov_type count_scale)
+{
+  gimple_stmt_iterator gsi, copy_gsi, seq_gsi;
+  basic_block copy_basic_block;
+  tree decl;
+
+  /* create_basic_block() will append every new block to
+     basic_block_info automatically.  */
+  copy_basic_block = create_basic_block (NULL, (void *) 0,
+                                         (basic_block) bb->prev_bb->aux);
+  copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE;
+
+  /* We are going to rebuild frequencies from scratch.  These values
+     have just small importance to drive canonicalize_loop_headers.  */
+  copy_basic_block->frequency = ((gcov_type)bb->frequency
+				 * frequency_scale / REG_BR_PROB_BASE);
+
+  if (copy_basic_block->frequency > BB_FREQ_MAX)
+    copy_basic_block->frequency = BB_FREQ_MAX;
+
+  copy_gsi = gsi_start_bb (copy_basic_block);
+
+  for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+    {
+      gimple stmt = gsi_stmt (gsi);
+      gimple orig_stmt = stmt;
+
+      id->regimplify = false;
+      stmt = remap_gimple_stmt (stmt, id);
+      if (gimple_nop_p (stmt))
+	continue;
+
+      gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt);
+      seq_gsi = copy_gsi;
+
+      /* With return slot optimization we can end up with
+	 non-gimple (foo *)&this->m, fix that here.  */
+      if (is_gimple_assign (stmt)
+	  && gimple_assign_rhs_code (stmt) == NOP_EXPR
+	  && !is_gimple_val (gimple_assign_rhs1 (stmt)))
+	{
+	  tree new_rhs;
+	  new_rhs = force_gimple_operand_gsi (&seq_gsi,
+	                                      gimple_assign_rhs1 (stmt),
+	                                      true, NULL, true, GSI_SAME_STMT);
+	  gimple_assign_set_rhs1 (stmt, new_rhs);
+	  id->regimplify = false;
+	}
+
+      gsi_insert_after (&seq_gsi, stmt, GSI_NEW_STMT);
+
+      if (id->regimplify)
+	gimple_regimplify_operands (stmt, &seq_gsi);
+
+      /* If copy_basic_block has been empty at the start of this iteration,
+	 call gsi_start_bb again to get at the newly added statements.  */
+      if (gsi_end_p (copy_gsi))
+	copy_gsi = gsi_start_bb (copy_basic_block);
+      else
+	gsi_next (&copy_gsi);
+
+      /* Process the new statement.  The call to gimple_regimplify_operands
+	 possibly turned the statement into multiple statements, we
+	 need to process all of them.  */
+      do
+	{
+	  stmt = gsi_stmt (copy_gsi);
+	  if (is_gimple_call (stmt)
+	      && gimple_call_va_arg_pack_p (stmt)
+	      && id->gimple_call)
+	    {
+	      /* __builtin_va_arg_pack () should be replaced by
+		 all arguments corresponding to ... in the caller.  */
+	      tree p;
+	      gimple new_call;
+	      VEC(tree, heap) *argarray;
+	      size_t nargs = gimple_call_num_args (id->gimple_call);
+	      size_t n;
+
+	      for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
+		nargs--;
+
+	      /* Create the new array of arguments.  */
+	      n = nargs + gimple_call_num_args (stmt);
+	      argarray = VEC_alloc (tree, heap, n);
+	      VEC_safe_grow (tree, heap, argarray, n);
+
+	      /* Copy all the arguments before '...'  */
+	      memcpy (VEC_address (tree, argarray),
+		      gimple_call_arg_ptr (stmt, 0),
+		      gimple_call_num_args (stmt) * sizeof (tree));
+
+	      /* Append the arguments passed in '...'  */
+	      memcpy (VEC_address(tree, argarray) + gimple_call_num_args (stmt),
+		      gimple_call_arg_ptr (id->gimple_call, 0)
+			+ (gimple_call_num_args (id->gimple_call) - nargs),
+		      nargs * sizeof (tree));
+
+	      new_call = gimple_build_call_vec (gimple_call_fn (stmt),
+						argarray);
+
+	      VEC_free (tree, heap, argarray);
+
+	      /* Copy all GIMPLE_CALL flags, location and block, except
+		 GF_CALL_VA_ARG_PACK.  */
+	      gimple_call_copy_flags (new_call, stmt);
+	      gimple_call_set_va_arg_pack (new_call, false);
+	      gimple_set_location (new_call, gimple_location (stmt));
+	      gimple_set_block (new_call, gimple_block (stmt));
+	      gimple_call_set_lhs (new_call, gimple_call_lhs (stmt));
+
+	      gsi_replace (&copy_gsi, new_call, false);
+	      gimple_set_bb (stmt, NULL);
+	      stmt = new_call;
+	    }
+	  else if (is_gimple_call (stmt)
+		   && id->gimple_call
+		   && (decl = gimple_call_fndecl (stmt))
+		   && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
+		   && DECL_FUNCTION_CODE (decl) == BUILT_IN_VA_ARG_PACK_LEN)
+	    {
+	      /* __builtin_va_arg_pack_len () should be replaced by
+		 the number of anonymous arguments.  */
+	      size_t nargs = gimple_call_num_args (id->gimple_call);
+	      tree count, p;
+	      gimple new_stmt;
+
+	      for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
+		nargs--;
+
+	      count = build_int_cst (integer_type_node, nargs);
+	      new_stmt = gimple_build_assign (gimple_call_lhs (stmt), count);
+	      gsi_replace (&copy_gsi, new_stmt, false);
+	      stmt = new_stmt;
+	    }
+
+	  /* Statements produced by inlining can be unfolded, especially
+	     when we constant propagated some operands.  We can't fold
+	     them right now for two reasons:
+	     1) folding require SSA_NAME_DEF_STMTs to be correct
+	     2) we can't change function calls to builtins.
+	     So we just mark statement for later folding.  We mark
+	     all new statements, instead just statements that has changed
+	     by some nontrivial substitution so even statements made
+	     foldable indirectly are updated.  If this turns out to be
+	     expensive, copy_body can be told to watch for nontrivial
+	     changes.  */
+	  if (id->statements_to_fold)
+	    pointer_set_insert (id->statements_to_fold, stmt);
+
+	  /* We're duplicating a CALL_EXPR.  Find any corresponding
+	     callgraph edges and update or duplicate them.  */
+	  if (is_gimple_call (stmt))
+	    {
+	      struct cgraph_node *node;
+	      struct cgraph_edge *edge;
+	      int flags;
+
+	      switch (id->transform_call_graph_edges)
+		{
+	      case CB_CGE_DUPLICATE:
+		edge = cgraph_edge (id->src_node, orig_stmt);
+		if (edge)
+		  cgraph_clone_edge (edge, id->dst_node, stmt,
+					   REG_BR_PROB_BASE, 1,
+					   edge->frequency, true);
+		break;
+
+	      case CB_CGE_MOVE_CLONES:
+		for (node = id->dst_node->next_clone;
+		    node;
+		    node = node->next_clone)
+		  {
+		    edge = cgraph_edge (node, orig_stmt);
+			  if (edge)
+			    cgraph_set_call_stmt (edge, stmt);
+		  }
+		/* FALLTHRU */
+
+	      case CB_CGE_MOVE:
+		edge = cgraph_edge (id->dst_node, orig_stmt);
+		if (edge)
+		  cgraph_set_call_stmt (edge, stmt);
+		break;
+
+	      default:
+		gcc_unreachable ();
+		}
+
+	      flags = gimple_call_flags (stmt);
+
+	      if (flags & ECF_MAY_BE_ALLOCA)
+		cfun->calls_alloca = true;
+	      if (flags & ECF_RETURNS_TWICE)
+		cfun->calls_setjmp = true;
+	    }
+
+	  /* If you think we can abort here, you are wrong.
+	     There is no region 0 in gimple.  */
+	  gcc_assert (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) != 0);
+
+	  if (stmt_could_throw_p (stmt)
+	      /* When we are cloning for inlining, we are supposed to
+		 construct a clone that calls precisely the same functions
+		 as original.  However IPA optimizers might've proved
+		 earlier some function calls as non-trapping that might
+		 render some basic blocks dead that might become
+		 unreachable.
+
+		 We can't update SSA with unreachable blocks in CFG and thus
+		 we prevent the scenario by preserving even the "dead" eh
+		 edges until the point they are later removed by
+		 fixup_cfg pass.  */
+	      || (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
+		  && lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) > 0))
+	    {
+	      int region = lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt);
+
+	      /* Add an entry for the copied tree in the EH hashtable.
+		 When cloning or versioning, use the hashtable in
+		 cfun, and just copy the EH number.  When inlining, use the
+		 hashtable in the caller, and adjust the region number.  */
+	      if (region > 0)
+		add_stmt_to_eh_region (stmt, region + id->eh_region_offset);
+
+	      /* If this tree doesn't have a region associated with it,
+		 and there is a "current region,"
+		 then associate this tree with the current region
+		 and add edges associated with this region.  */
+	      if (lookup_stmt_eh_region_fn (id->src_cfun, orig_stmt) <= 0
+		  && id->eh_region > 0
+		  && stmt_could_throw_p (stmt))
+		add_stmt_to_eh_region (stmt, id->eh_region);
+	    }
+
+	  if (gimple_in_ssa_p (cfun))
+	    {
+	      ssa_op_iter i;
+	      tree def;
+
+	      find_new_referenced_vars (gsi_stmt (copy_gsi));
+	      FOR_EACH_SSA_TREE_OPERAND (def, stmt, i, SSA_OP_DEF)
+		if (TREE_CODE (def) == SSA_NAME)
+		  SSA_NAME_DEF_STMT (def) = stmt;
+	    }
+
+	  gsi_next (&copy_gsi);
+	}
+      while (!gsi_end_p (copy_gsi));
+
+      copy_gsi = gsi_last_bb (copy_basic_block);
+    }
+
+  return copy_basic_block;
+}
+
+/* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
+   form is quite easy, since dominator relationship for old basic blocks does
+   not change.
+
+   There is however exception where inlining might change dominator relation
+   across EH edges from basic block within inlined functions destinating
+   to landing pads in function we inline into.
+
+   The function fills in PHI_RESULTs of such PHI nodes if they refer
+   to gimple regs.  Otherwise, the function mark PHI_RESULT of such
+   PHI nodes for renaming.  For non-gimple regs, renaming is safe: the
+   EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
+   set, and this means that there will be no overlapping live ranges
+   for the underlying symbol.
+
+   This might change in future if we allow redirecting of EH edges and
+   we might want to change way build CFG pre-inlining to include
+   all the possible edges then.  */
+static void
+update_ssa_across_abnormal_edges (basic_block bb, basic_block ret_bb,
+				  bool can_throw, bool nonlocal_goto)
+{
+  edge e;
+  edge_iterator ei;
+
+  FOR_EACH_EDGE (e, ei, bb->succs)
+    if (!e->dest->aux
+	|| ((basic_block)e->dest->aux)->index == ENTRY_BLOCK)
+      {
+	gimple phi;
+	gimple_stmt_iterator si;
+
+	gcc_assert (e->flags & EDGE_ABNORMAL);
+
+	if (!nonlocal_goto)
+	  gcc_assert (e->flags & EDGE_EH);
+
+	if (!can_throw)
+	  gcc_assert (!(e->flags & EDGE_EH));
+
+	for (si = gsi_start_phis (e->dest); !gsi_end_p (si); gsi_next (&si))
+	  {
+	    edge re;
+
+	    phi = gsi_stmt (si);
+
+	    /* There shouldn't be any PHI nodes in the ENTRY_BLOCK.  */
+	    gcc_assert (!e->dest->aux);
+
+	    gcc_assert (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi)));
+
+	    if (!is_gimple_reg (PHI_RESULT (phi)))
+	      {
+		mark_sym_for_renaming (SSA_NAME_VAR (PHI_RESULT (phi)));
+		continue;
+	      }
+
+	    re = find_edge (ret_bb, e->dest);
+	    gcc_assert (re);
+	    gcc_assert ((re->flags & (EDGE_EH | EDGE_ABNORMAL))
+			== (e->flags & (EDGE_EH | EDGE_ABNORMAL)));
+
+	    SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi, e),
+		     USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi, re)));
+	  }
+      }
+}
+
+
+/* Copy edges from BB into its copy constructed earlier, scale profile
+   accordingly.  Edges will be taken care of later.  Assume aux
+   pointers to point to the copies of each BB.  */
+
+static void
+copy_edges_for_bb (basic_block bb, gcov_type count_scale, basic_block ret_bb)
+{
+  basic_block new_bb = (basic_block) bb->aux;
+  edge_iterator ei;
+  edge old_edge;
+  gimple_stmt_iterator si;
+  int flags;
+
+  /* Use the indices from the original blocks to create edges for the
+     new ones.  */
+  FOR_EACH_EDGE (old_edge, ei, bb->succs)
+    if (!(old_edge->flags & EDGE_EH))
+      {
+	edge new_edge;
+
+	flags = old_edge->flags;
+
+	/* Return edges do get a FALLTHRU flag when the get inlined.  */
+	if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags
+	    && old_edge->dest->aux != EXIT_BLOCK_PTR)
+	  flags |= EDGE_FALLTHRU;
+	new_edge = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags);
+	new_edge->count = old_edge->count * count_scale / REG_BR_PROB_BASE;
+	new_edge->probability = old_edge->probability;
+      }
+
+  if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK)
+    return;
+
+  for (si = gsi_start_bb (new_bb); !gsi_end_p (si);)
+    {
+      gimple copy_stmt;
+      bool can_throw, nonlocal_goto;
+
+      copy_stmt = gsi_stmt (si);
+      update_stmt (copy_stmt);
+      if (gimple_in_ssa_p (cfun))
+        mark_symbols_for_renaming (copy_stmt);
+
+      /* Do this before the possible split_block.  */
+      gsi_next (&si);
+
+      /* If this tree could throw an exception, there are two
+         cases where we need to add abnormal edge(s): the
+         tree wasn't in a region and there is a "current
+         region" in the caller; or the original tree had
+         EH edges.  In both cases split the block after the tree,
+         and add abnormal edge(s) as needed; we need both
+         those from the callee and the caller.
+         We check whether the copy can throw, because the const
+         propagation can change an INDIRECT_REF which throws
+         into a COMPONENT_REF which doesn't.  If the copy
+         can throw, the original could also throw.  */
+      can_throw = stmt_can_throw_internal (copy_stmt);
+      nonlocal_goto = stmt_can_make_abnormal_goto (copy_stmt);
+
+      if (can_throw || nonlocal_goto)
+	{
+	  if (!gsi_end_p (si))
+	    /* Note that bb's predecessor edges aren't necessarily
+	       right at this point; split_block doesn't care.  */
+	    {
+	      edge e = split_block (new_bb, copy_stmt);
+
+	      new_bb = e->dest;
+	      new_bb->aux = e->src->aux;
+	      si = gsi_start_bb (new_bb);
+	    }
+	}
+
+      if (can_throw)
+	make_eh_edges (copy_stmt);
+
+      if (nonlocal_goto)
+	make_abnormal_goto_edges (gimple_bb (copy_stmt), true);
+
+      if ((can_throw || nonlocal_goto)
+	  && gimple_in_ssa_p (cfun))
+	update_ssa_across_abnormal_edges (gimple_bb (copy_stmt), ret_bb,
+					  can_throw, nonlocal_goto);
+    }
+}
+
+/* Copy the PHIs.  All blocks and edges are copied, some blocks
+   was possibly split and new outgoing EH edges inserted.
+   BB points to the block of original function and AUX pointers links
+   the original and newly copied blocks.  */
+
+static void
+copy_phis_for_bb (basic_block bb, copy_body_data *id)
+{
+  basic_block const new_bb = (basic_block) bb->aux;
+  edge_iterator ei;
+  gimple phi;
+  gimple_stmt_iterator si;
+
+  for (si = gsi_start (phi_nodes (bb)); !gsi_end_p (si); gsi_next (&si))
+    {
+      tree res, new_res;
+      gimple new_phi;
+      edge new_edge;
+
+      phi = gsi_stmt (si);
+      res = PHI_RESULT (phi);
+      new_res = res;
+      if (is_gimple_reg (res))
+	{
+	  walk_tree (&new_res, copy_tree_body_r, id, NULL);
+	  SSA_NAME_DEF_STMT (new_res)
+	    = new_phi = create_phi_node (new_res, new_bb);
+	  FOR_EACH_EDGE (new_edge, ei, new_bb->preds)
+	    {
+	      edge const old_edge
+		= find_edge ((basic_block) new_edge->src->aux, bb);
+	      tree arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
+	      tree new_arg = arg;
+	      tree block = id->block;
+	      id->block = NULL_TREE;
+	      walk_tree (&new_arg, copy_tree_body_r, id, NULL);
+	      id->block = block;
+	      gcc_assert (new_arg);
+	      /* With return slot optimization we can end up with
+	         non-gimple (foo *)&this->m, fix that here.  */
+	      if (TREE_CODE (new_arg) != SSA_NAME
+		  && TREE_CODE (new_arg) != FUNCTION_DECL
+		  && !is_gimple_val (new_arg))
+		{
+		  gimple_seq stmts = NULL;
+		  new_arg = force_gimple_operand (new_arg, &stmts, true, NULL);
+		  gsi_insert_seq_on_edge_immediate (new_edge, stmts);
+		}
+	      add_phi_arg (new_phi, new_arg, new_edge);
+	    }
+	}
+    }
+}
+
+
+/* Wrapper for remap_decl so it can be used as a callback.  */
+
+static tree
+remap_decl_1 (tree decl, void *data)
+{
+  return remap_decl (decl, (copy_body_data *) data);
+}
+
+/* Build struct function and associated datastructures for the new clone
+   NEW_FNDECL to be build.  CALLEE_FNDECL is the original */
+
+static void
+initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count,
+		 int frequency)
+{
+  struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+  gcov_type count_scale, frequency_scale;
+
+  if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
+    count_scale = (REG_BR_PROB_BASE * count
+		   / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
+  else
+    count_scale = 1;
+
+  if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
+    frequency_scale = (REG_BR_PROB_BASE * frequency
+		       /
+		       ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
+  else
+    frequency_scale = count_scale;
+
+  /* Register specific tree functions.  */
+  gimple_register_cfg_hooks ();
+
+  /* Get clean struct function.  */
+  push_struct_function (new_fndecl);
+
+  /* We will rebuild these, so just sanity check that they are empty.  */
+  gcc_assert (VALUE_HISTOGRAMS (cfun) == NULL);
+  gcc_assert (cfun->local_decls == NULL);
+  gcc_assert (cfun->cfg == NULL);
+  gcc_assert (cfun->decl == new_fndecl);
+
+  /* Copy items we preserve during clonning.  */
+  cfun->static_chain_decl = src_cfun->static_chain_decl;
+  cfun->nonlocal_goto_save_area = src_cfun->nonlocal_goto_save_area;
+  cfun->function_end_locus = src_cfun->function_end_locus;
+  cfun->curr_properties = src_cfun->curr_properties;
+  cfun->last_verified = src_cfun->last_verified;
+  if (src_cfun->ipa_transforms_to_apply)
+    cfun->ipa_transforms_to_apply = VEC_copy (ipa_opt_pass, heap,
+					      src_cfun->ipa_transforms_to_apply);
+  cfun->va_list_gpr_size = src_cfun->va_list_gpr_size;
+  cfun->va_list_fpr_size = src_cfun->va_list_fpr_size;
+  cfun->function_frequency = src_cfun->function_frequency;
+  cfun->has_nonlocal_label = src_cfun->has_nonlocal_label;
+  cfun->stdarg = src_cfun->stdarg;
+  cfun->dont_save_pending_sizes_p = src_cfun->dont_save_pending_sizes_p;
+  cfun->after_inlining = src_cfun->after_inlining;
+  cfun->returns_struct = src_cfun->returns_struct;
+  cfun->returns_pcc_struct = src_cfun->returns_pcc_struct;
+  cfun->after_tree_profile = src_cfun->after_tree_profile;
+
+  init_empty_tree_cfg ();
+
+  ENTRY_BLOCK_PTR->count =
+    (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
+     REG_BR_PROB_BASE);
+  ENTRY_BLOCK_PTR->frequency =
+    (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
+     frequency_scale / REG_BR_PROB_BASE);
+  EXIT_BLOCK_PTR->count =
+    (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
+     REG_BR_PROB_BASE);
+  EXIT_BLOCK_PTR->frequency =
+    (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency *
+     frequency_scale / REG_BR_PROB_BASE);
+  if (src_cfun->eh)
+    init_eh_for_function ();
+
+  if (src_cfun->gimple_df)
+    {
+      init_tree_ssa (cfun);
+      cfun->gimple_df->in_ssa_p = true;
+      init_ssa_operands ();
+    }
+  pop_cfun ();
+}
+
+/* Make a copy of the body of FN so that it can be inserted inline in
+   another function.  Walks FN via CFG, returns new fndecl.  */
+
+static tree
+copy_cfg_body (copy_body_data * id, gcov_type count, int frequency,
+	       basic_block entry_block_map, basic_block exit_block_map)
+{
+  tree callee_fndecl = id->src_fn;
+  /* Original cfun for the callee, doesn't change.  */
+  struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+  struct function *cfun_to_copy;
+  basic_block bb;
+  tree new_fndecl = NULL;
+  gcov_type count_scale, frequency_scale;
+  int last;
+
+  if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
+    count_scale = (REG_BR_PROB_BASE * count
+		   / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
+  else
+    count_scale = 1;
+
+  if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency)
+    frequency_scale = (REG_BR_PROB_BASE * frequency
+		       /
+		       ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency);
+  else
+    frequency_scale = count_scale;
+
+  /* Register specific tree functions.  */
+  gimple_register_cfg_hooks ();
+
+  /* Must have a CFG here at this point.  */
+  gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION
+	      (DECL_STRUCT_FUNCTION (callee_fndecl)));
+
+  cfun_to_copy = id->src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
+
+  ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map;
+  EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map;
+  entry_block_map->aux = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
+  exit_block_map->aux = EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
+
+  /* Duplicate any exception-handling regions.  */
+  if (cfun->eh)
+    {
+      id->eh_region_offset
+	= duplicate_eh_regions (cfun_to_copy, remap_decl_1, id,
+				0, id->eh_region);
+    }
+
+  /* Use aux pointers to map the original blocks to copy.  */
+  FOR_EACH_BB_FN (bb, cfun_to_copy)
+    {
+      basic_block new_bb = copy_bb (id, bb, frequency_scale, count_scale);
+      bb->aux = new_bb;
+      new_bb->aux = bb;
+    }
+
+  last = last_basic_block;
+
+  /* Now that we've duplicated the blocks, duplicate their edges.  */
+  FOR_ALL_BB_FN (bb, cfun_to_copy)
+    copy_edges_for_bb (bb, count_scale, exit_block_map);
+
+  if (gimple_in_ssa_p (cfun))
+    FOR_ALL_BB_FN (bb, cfun_to_copy)
+      copy_phis_for_bb (bb, id);
+
+  FOR_ALL_BB_FN (bb, cfun_to_copy)
+    {
+      ((basic_block)bb->aux)->aux = NULL;
+      bb->aux = NULL;
+    }
+
+  /* Zero out AUX fields of newly created block during EH edge
+     insertion. */
+  for (; last < last_basic_block; last++)
+    BASIC_BLOCK (last)->aux = NULL;
+  entry_block_map->aux = NULL;
+  exit_block_map->aux = NULL;
+
+  return new_fndecl;
+}
+
+static tree
+copy_body (copy_body_data *id, gcov_type count, int frequency,
+	   basic_block entry_block_map, basic_block exit_block_map)
+{
+  tree fndecl = id->src_fn;
+  tree body;
+
+  /* If this body has a CFG, walk CFG and copy.  */
+  gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl)));
+  body = copy_cfg_body (id, count, frequency, entry_block_map, exit_block_map);
+
+  return body;
+}
+
+/* Return true if VALUE is an ADDR_EXPR of an automatic variable
+   defined in function FN, or of a data member thereof.  */
+
+static bool
+self_inlining_addr_expr (tree value, tree fn)
+{
+  tree var;
+
+  if (TREE_CODE (value) != ADDR_EXPR)
+    return false;
+
+  var = get_base_address (TREE_OPERAND (value, 0));
+
+  return var && auto_var_in_fn_p (var, fn);
+}
+
+static void
+insert_init_stmt (basic_block bb, gimple init_stmt)
+{
+  /* If VAR represents a zero-sized variable, it's possible that the
+     assignment statement may result in no gimple statements.  */
+  if (init_stmt)
+    {
+      gimple_stmt_iterator si = gsi_last_bb (bb);
+
+      /* We can end up with init statements that store to a non-register
+         from a rhs with a conversion.  Handle that here by forcing the
+	 rhs into a temporary.  gimple_regimplify_operands is not
+	 prepared to do this for us.  */
+      if (!is_gimple_reg (gimple_assign_lhs (init_stmt))
+	  && is_gimple_reg_type (TREE_TYPE (gimple_assign_lhs (init_stmt)))
+	  && gimple_assign_rhs_class (init_stmt) == GIMPLE_UNARY_RHS)
+	{
+	  tree rhs = build1 (gimple_assign_rhs_code (init_stmt),
+			     gimple_expr_type (init_stmt),
+			     gimple_assign_rhs1 (init_stmt));
+	  rhs = force_gimple_operand_gsi (&si, rhs, true, NULL_TREE, false,
+					  GSI_NEW_STMT);
+	  gimple_assign_set_rhs_code (init_stmt, TREE_CODE (rhs));
+	  gimple_assign_set_rhs1 (init_stmt, rhs);
+	}
+      gsi_insert_after (&si, init_stmt, GSI_NEW_STMT);
+      gimple_regimplify_operands (init_stmt, &si);
+      mark_symbols_for_renaming (init_stmt);
+    }
+}
+
+/* Initialize parameter P with VALUE.  If needed, produce init statement
+   at the end of BB.  When BB is NULL, we return init statement to be
+   output later.  */
+static gimple
+setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
+		     basic_block bb, tree *vars)
+{
+  gimple init_stmt = NULL;
+  tree var;
+  tree rhs = value;
+  tree def = (gimple_in_ssa_p (cfun)
+	      ? gimple_default_def (id->src_cfun, p) : NULL);
+
+  if (value
+      && value != error_mark_node
+      && !useless_type_conversion_p (TREE_TYPE (p), TREE_TYPE (value)))
+    {
+      if (fold_convertible_p (TREE_TYPE (p), value))
+	rhs = fold_build1 (NOP_EXPR, TREE_TYPE (p), value);
+      else
+	/* ???  For valid (GIMPLE) programs we should not end up here.
+	   Still if something has gone wrong and we end up with truly
+	   mismatched types here, fall back to using a VIEW_CONVERT_EXPR
+	   to not leak invalid GIMPLE to the following passes.  */
+	rhs = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (p), value);
+    }
+
+  /* If the parameter is never assigned to, has no SSA_NAMEs created,
+     we may not need to create a new variable here at all.  Instead, we may
+     be able to just use the argument value.  */
+  if (TREE_READONLY (p)
+      && !TREE_ADDRESSABLE (p)
+      && value && !TREE_SIDE_EFFECTS (value)
+      && !def)
+    {
+      /* We may produce non-gimple trees by adding NOPs or introduce
+	 invalid sharing when operand is not really constant.
+	 It is not big deal to prohibit constant propagation here as
+	 we will constant propagate in DOM1 pass anyway.  */
+      if (is_gimple_min_invariant (value)
+	  && useless_type_conversion_p (TREE_TYPE (p),
+						 TREE_TYPE (value))
+	  /* We have to be very careful about ADDR_EXPR.  Make sure
+	     the base variable isn't a local variable of the inlined
+	     function, e.g., when doing recursive inlining, direct or
+	     mutually-recursive or whatever, which is why we don't
+	     just test whether fn == current_function_decl.  */
+	  && ! self_inlining_addr_expr (value, fn))
+	{
+	  insert_decl_map (id, p, value);
+	  return NULL;
+	}
+    }
+
+  /* Make an equivalent VAR_DECL.  Note that we must NOT remap the type
+     here since the type of this decl must be visible to the calling
+     function.  */
+  var = copy_decl_to_var (p, id);
+  if (gimple_in_ssa_p (cfun) && TREE_CODE (var) == VAR_DECL)
+    {
+      get_var_ann (var);
+      add_referenced_var (var);
+    }
+
+  /* Register the VAR_DECL as the equivalent for the PARM_DECL;
+     that way, when the PARM_DECL is encountered, it will be
+     automatically replaced by the VAR_DECL.  */
+  insert_decl_map (id, p, var);
+
+  /* Declare this new variable.  */
+  TREE_CHAIN (var) = *vars;
+  *vars = var;
+
+  /* Make gimplifier happy about this variable.  */
+  DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
+
+  /* Even if P was TREE_READONLY, the new VAR should not be.
+     In the original code, we would have constructed a
+     temporary, and then the function body would have never
+     changed the value of P.  However, now, we will be
+     constructing VAR directly.  The constructor body may
+     change its value multiple times as it is being
+     constructed.  Therefore, it must not be TREE_READONLY;
+     the back-end assumes that TREE_READONLY variable is
+     assigned to only once.  */
+  if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p)))
+    TREE_READONLY (var) = 0;
+
+  /* If there is no setup required and we are in SSA, take the easy route
+     replacing all SSA names representing the function parameter by the
+     SSA name passed to function.
+
+     We need to construct map for the variable anyway as it might be used
+     in different SSA names when parameter is set in function.
+
+     Do replacement at -O0 for const arguments replaced by constant.
+     This is important for builtin_constant_p and other construct requiring
+     constant argument to be visible in inlined function body.
+
+     FIXME: This usually kills the last connection in between inlined
+     function parameter and the actual value in debug info.  Can we do
+     better here?  If we just inserted the statement, copy propagation
+     would kill it anyway as it always did in older versions of GCC.
+
+     We might want to introduce a notion that single SSA_NAME might
+     represent multiple variables for purposes of debugging. */
+  if (gimple_in_ssa_p (cfun) && rhs && def && is_gimple_reg (p)
+      && (optimize
+          || (TREE_READONLY (p)
+	      && is_gimple_min_invariant (rhs)))
+      && (TREE_CODE (rhs) == SSA_NAME
+	  || is_gimple_min_invariant (rhs))
+      && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def))
+    {
+      insert_decl_map (id, def, rhs);
+      return NULL;
+    }
+
+  /* If the value of argument is never used, don't care about initializing
+     it.  */
+  if (optimize && gimple_in_ssa_p (cfun) && !def && is_gimple_reg (p))
+    {
+      gcc_assert (!value || !TREE_SIDE_EFFECTS (value));
+      return NULL;
+    }
+
+  /* Initialize this VAR_DECL from the equivalent argument.  Convert
+     the argument to the proper type in case it was promoted.  */
+  if (value)
+    {
+      if (rhs == error_mark_node)
+	{
+	  insert_decl_map (id, p, var);
+	  return NULL;
+	}
+
+      STRIP_USELESS_TYPE_CONVERSION (rhs);
+
+      /* We want to use MODIFY_EXPR, not INIT_EXPR here so that we
+	 keep our trees in gimple form.  */
+      if (def && gimple_in_ssa_p (cfun) && is_gimple_reg (p))
+	{
+	  def = remap_ssa_name (def, id);
+          init_stmt = gimple_build_assign (def, rhs);
+	  SSA_NAME_IS_DEFAULT_DEF (def) = 0;
+	  set_default_def (var, NULL);
+	}
+      else
+        init_stmt = gimple_build_assign (var, rhs);
+
+      if (bb && init_stmt)
+        insert_init_stmt (bb, init_stmt);
+    }
+  return init_stmt;
+}
+
+/* Generate code to initialize the parameters of the function at the
+   top of the stack in ID from the GIMPLE_CALL STMT.  */
+
+static void
+initialize_inlined_parameters (copy_body_data *id, gimple stmt,
+			       tree fn, basic_block bb)
+{
+  tree parms;
+  size_t i;
+  tree p;
+  tree vars = NULL_TREE;
+  tree static_chain = gimple_call_chain (stmt);
+
+  /* Figure out what the parameters are.  */
+  parms = DECL_ARGUMENTS (fn);
+
+  /* Loop through the parameter declarations, replacing each with an
+     equivalent VAR_DECL, appropriately initialized.  */
+  for (p = parms, i = 0; p; p = TREE_CHAIN (p), i++)
+    {
+      tree val;
+      val = i < gimple_call_num_args (stmt) ? gimple_call_arg (stmt, i) : NULL;
+      setup_one_parameter (id, p, val, fn, bb, &vars);
+    }
+
+  /* Initialize the static chain.  */
+  p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
+  gcc_assert (fn != current_function_decl);
+  if (p)
+    {
+      /* No static chain?  Seems like a bug in tree-nested.c.  */
+      gcc_assert (static_chain);
+
+      setup_one_parameter (id, p, static_chain, fn, bb, &vars);
+    }
+
+  declare_inline_vars (id->block, vars);
+}
+
+
+/* Declare a return variable to replace the RESULT_DECL for the
+   function we are calling.  An appropriate DECL_STMT is returned.
+   The USE_STMT is filled to contain a use of the declaration to
+   indicate the return value of the function.
+
+   RETURN_SLOT, if non-null is place where to store the result.  It
+   is set only for CALL_EXPR_RETURN_SLOT_OPT.  MODIFY_DEST, if non-null,
+   was the LHS of the MODIFY_EXPR to which this call is the RHS.
+
+   The return value is a (possibly null) value that is the result of the
+   function as seen by the callee.  *USE_P is a (possibly null) value that
+   holds the result as seen by the caller.  */
+
+static tree
+declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
+			 tree *use_p)
+{
+  tree callee = id->src_fn;
+  tree caller = id->dst_fn;
+  tree result = DECL_RESULT (callee);
+  tree callee_type = TREE_TYPE (result);
+  tree caller_type = TREE_TYPE (TREE_TYPE (callee));
+  tree var, use;
+
+  /* We don't need to do anything for functions that don't return
+     anything.  */
+  if (!result || VOID_TYPE_P (callee_type))
+    {
+      *use_p = NULL_TREE;
+      return NULL_TREE;
+    }
+
+  /* If there was a return slot, then the return value is the
+     dereferenced address of that object.  */
+  if (return_slot)
+    {
+      /* The front end shouldn't have used both return_slot and
+	 a modify expression.  */
+      gcc_assert (!modify_dest);
+      if (DECL_BY_REFERENCE (result))
+	{
+	  tree return_slot_addr = build_fold_addr_expr (return_slot);
+	  STRIP_USELESS_TYPE_CONVERSION (return_slot_addr);
+
+	  /* We are going to construct *&return_slot and we can't do that
+	     for variables believed to be not addressable. 
+
+	     FIXME: This check possibly can match, because values returned
+	     via return slot optimization are not believed to have address
+	     taken by alias analysis.  */
+	  gcc_assert (TREE_CODE (return_slot) != SSA_NAME);
+	  if (gimple_in_ssa_p (cfun))
+	    {
+	      HOST_WIDE_INT bitsize;
+	      HOST_WIDE_INT bitpos;
+	      tree offset;
+	      enum machine_mode mode;
+	      int unsignedp;
+	      int volatilep;
+	      tree base;
+	      base = get_inner_reference (return_slot, &bitsize, &bitpos,
+					  &offset,
+					  &mode, &unsignedp, &volatilep,
+					  false);
+	      if (TREE_CODE (base) == INDIRECT_REF)
+		base = TREE_OPERAND (base, 0);
+	      if (TREE_CODE (base) == SSA_NAME)
+		base = SSA_NAME_VAR (base);
+	      mark_sym_for_renaming (base);
+	    }
+	  var = return_slot_addr;
+	}
+      else
+	{
+	  var = return_slot;
+	  gcc_assert (TREE_CODE (var) != SSA_NAME);
+	  TREE_ADDRESSABLE (var) |= TREE_ADDRESSABLE (result);
+	}
+      if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
+           || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
+	  && !DECL_GIMPLE_REG_P (result)
+	  && DECL_P (var))
+	DECL_GIMPLE_REG_P (var) = 0;
+      use = NULL;
+      goto done;
+    }
+
+  /* All types requiring non-trivial constructors should have been handled.  */
+  gcc_assert (!TREE_ADDRESSABLE (callee_type));
+
+  /* Attempt to avoid creating a new temporary variable.  */
+  if (modify_dest
+      && TREE_CODE (modify_dest) != SSA_NAME)
+    {
+      bool use_it = false;
+
+      /* We can't use MODIFY_DEST if there's type promotion involved.  */
+      if (!useless_type_conversion_p (callee_type, caller_type))
+	use_it = false;
+
+      /* ??? If we're assigning to a variable sized type, then we must
+	 reuse the destination variable, because we've no good way to
+	 create variable sized temporaries at this point.  */
+      else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST)
+	use_it = true;
+
+      /* If the callee cannot possibly modify MODIFY_DEST, then we can
+	 reuse it as the result of the call directly.  Don't do this if
+	 it would promote MODIFY_DEST to addressable.  */
+      else if (TREE_ADDRESSABLE (result))
+	use_it = false;
+      else
+	{
+	  tree base_m = get_base_address (modify_dest);
+
+	  /* If the base isn't a decl, then it's a pointer, and we don't
+	     know where that's going to go.  */
+	  if (!DECL_P (base_m))
+	    use_it = false;
+	  else if (is_global_var (base_m))
+	    use_it = false;
+	  else if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
+		    || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
+		   && !DECL_GIMPLE_REG_P (result)
+		   && DECL_GIMPLE_REG_P (base_m))
+	    use_it = false;
+	  else if (!TREE_ADDRESSABLE (base_m))
+	    use_it = true;
+	}
+
+      if (use_it)
+	{
+	  var = modify_dest;
+	  use = NULL;
+	  goto done;
+	}
+    }
+
+  gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST);
+
+  var = copy_result_decl_to_var (result, id);
+  if (gimple_in_ssa_p (cfun))
+    {
+      get_var_ann (var);
+      add_referenced_var (var);
+    }
+
+  DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
+  DECL_STRUCT_FUNCTION (caller)->local_decls
+    = tree_cons (NULL_TREE, var,
+		 DECL_STRUCT_FUNCTION (caller)->local_decls);
+
+  /* Do not have the rest of GCC warn about this variable as it should
+     not be visible to the user.  */
+  TREE_NO_WARNING (var) = 1;
+
+  declare_inline_vars (id->block, var);
+
+  /* Build the use expr.  If the return type of the function was
+     promoted, convert it back to the expected type.  */
+  use = var;
+  if (!useless_type_conversion_p (caller_type, TREE_TYPE (var)))
+    use = fold_convert (caller_type, var);
+    
+  STRIP_USELESS_TYPE_CONVERSION (use);
+
+  if (DECL_BY_REFERENCE (result))
+    var = build_fold_addr_expr (var);
+
+ done:
+  /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
+     way, when the RESULT_DECL is encountered, it will be
+     automatically replaced by the VAR_DECL.  */
+  insert_decl_map (id, result, var);
+
+  /* Remember this so we can ignore it in remap_decls.  */
+  id->retvar = var;
+
+  *use_p = use;
+  return var;
+}
+
+/* Returns nonzero if a function can be inlined as a tree.  */
+
+bool
+tree_inlinable_function_p (tree fn)
+{
+  return inlinable_function_p (fn);
+}
+
+static const char *inline_forbidden_reason;
+
+/* A callback for walk_gimple_seq to handle tree operands.  Returns
+   NULL_TREE if a function can be inlined, otherwise sets the reason
+   why not and returns a tree representing the offending operand. */
+
+static tree
+inline_forbidden_p_op (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED,
+                         void *fnp ATTRIBUTE_UNUSED)
+{
+  tree node = *nodep;
+  tree t;
+
+  if (TREE_CODE (node) == RECORD_TYPE || TREE_CODE (node) == UNION_TYPE)
+    {
+      /* We cannot inline a function of the form
+
+	   void F (int i) { struct S { int ar[i]; } s; }
+
+	 Attempting to do so produces a catch-22.
+	 If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
+	 UNION_TYPE nodes, then it goes into infinite recursion on a
+	 structure containing a pointer to its own type.  If it doesn't,
+	 then the type node for S doesn't get adjusted properly when
+	 F is inlined. 
+
+	 ??? This is likely no longer true, but it's too late in the 4.0
+	 cycle to try to find out.  This should be checked for 4.1.  */
+      for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
+	if (variably_modified_type_p (TREE_TYPE (t), NULL))
+	  {
+	    inline_forbidden_reason
+	      = G_("function %q+F can never be inlined "
+		   "because it uses variable sized variables");
+	    return node;
+	  }
+    }
+
+  return NULL_TREE;
+}
+
+
+/* A callback for walk_gimple_seq to handle statements.  Returns
+   non-NULL iff a function can not be inlined.  Also sets the reason
+   why. */
+
+static tree
+inline_forbidden_p_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p,
+			 struct walk_stmt_info *wip)
+{
+  tree fn = (tree) wip->info;
+  tree t;
+  gimple stmt = gsi_stmt (*gsi);
+
+  switch (gimple_code (stmt))
+    {
+    case GIMPLE_CALL:
+      /* Refuse to inline alloca call unless user explicitly forced so as
+	 this may change program's memory overhead drastically when the
+	 function using alloca is called in loop.  In GCC present in
+	 SPEC2000 inlining into schedule_block cause it to require 2GB of
+	 RAM instead of 256MB.  */
+      if (gimple_alloca_call_p (stmt)
+	  && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
+	{
+	  inline_forbidden_reason
+	    = G_("function %q+F can never be inlined because it uses "
+		 "alloca (override using the always_inline attribute)");
+	  *handled_ops_p = true;
+	  return fn;
+	}
+
+      t = gimple_call_fndecl (stmt);
+      if (t == NULL_TREE)
+	break;
+
+      /* We cannot inline functions that call setjmp.  */
+      if (setjmp_call_p (t))
+	{
+	  inline_forbidden_reason
+	    = G_("function %q+F can never be inlined because it uses setjmp");
+	  *handled_ops_p = true;
+	  return t;
+	}
+
+      if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL)
+	switch (DECL_FUNCTION_CODE (t))
+	  {
+	    /* We cannot inline functions that take a variable number of
+	       arguments.  */
+	  case BUILT_IN_VA_START:
+	  case BUILT_IN_NEXT_ARG:
+	  case BUILT_IN_VA_END:
+	    inline_forbidden_reason
+	      = G_("function %q+F can never be inlined because it "
+		   "uses variable argument lists");
+	    *handled_ops_p = true;
+	    return t;
+
+	  case BUILT_IN_LONGJMP:
+	    /* We can't inline functions that call __builtin_longjmp at
+	       all.  The non-local goto machinery really requires the
+	       destination be in a different function.  If we allow the
+	       function calling __builtin_longjmp to be inlined into the
+	       function calling __builtin_setjmp, Things will Go Awry.  */
+	    inline_forbidden_reason
+	      = G_("function %q+F can never be inlined because "
+		   "it uses setjmp-longjmp exception handling");
+	    *handled_ops_p = true;
+	    return t;
+
+	  case BUILT_IN_NONLOCAL_GOTO:
+	    /* Similarly.  */
+	    inline_forbidden_reason
+	      = G_("function %q+F can never be inlined because "
+		   "it uses non-local goto");
+	    *handled_ops_p = true;
+	    return t;
+
+	  case BUILT_IN_RETURN:
+	  case BUILT_IN_APPLY_ARGS:
+	    /* If a __builtin_apply_args caller would be inlined,
+	       it would be saving arguments of the function it has
+	       been inlined into.  Similarly __builtin_return would
+	       return from the function the inline has been inlined into.  */
+	    inline_forbidden_reason
+	      = G_("function %q+F can never be inlined because "
+		   "it uses __builtin_return or __builtin_apply_args");
+	    *handled_ops_p = true;
+	    return t;
+
+	  default:
+	    break;
+	  }
+      break;
+
+    case GIMPLE_GOTO:
+      t = gimple_goto_dest (stmt);
+
+      /* We will not inline a function which uses computed goto.  The
+	 addresses of its local labels, which may be tucked into
+	 global storage, are of course not constant across
+	 instantiations, which causes unexpected behavior.  */
+      if (TREE_CODE (t) != LABEL_DECL)
+	{
+	  inline_forbidden_reason
+	    = G_("function %q+F can never be inlined "
+		 "because it contains a computed goto");
+	  *handled_ops_p = true;
+	  return t;
+	}
+      break;
+
+    case GIMPLE_LABEL:
+      t = gimple_label_label (stmt);
+      if (DECL_NONLOCAL (t))
+	{
+	  /* We cannot inline a function that receives a non-local goto
+	     because we cannot remap the destination label used in the
+	     function that is performing the non-local goto.  */
+	  inline_forbidden_reason
+	    = G_("function %q+F can never be inlined "
+		 "because it receives a non-local goto");
+	  *handled_ops_p = true;
+	  return t;
+	}
+      break;
+
+    default:
+      break;
+    }
+
+  *handled_ops_p = false;
+  return NULL_TREE;
+}
+
+
+static tree
+inline_forbidden_p_2 (tree *nodep, int *walk_subtrees,
+		      void *fnp)
+{
+  tree node = *nodep;
+  tree fn = (tree) fnp;
+
+  if (TREE_CODE (node) == LABEL_DECL && DECL_CONTEXT (node) == fn)
+    {
+      inline_forbidden_reason
+	= G_("function %q+F can never be inlined "
+	     "because it saves address of local label in a static variable");
+      return node;
+    }
+
+  if (TYPE_P (node))
+    *walk_subtrees = 0;
+
+  return NULL_TREE;
+}
+
+/* Return true if FNDECL is a function that cannot be inlined into
+   another one.  */
+
+static bool
+inline_forbidden_p (tree fndecl)
+{
+  location_t saved_loc = input_location;
+  struct function *fun = DECL_STRUCT_FUNCTION (fndecl);
+  tree step;
+  struct walk_stmt_info wi;
+  struct pointer_set_t *visited_nodes;
+  basic_block bb;
+  bool forbidden_p = false;
+
+  visited_nodes = pointer_set_create ();
+  memset (&wi, 0, sizeof (wi));
+  wi.info = (void *) fndecl;
+  wi.pset = visited_nodes;
+
+  FOR_EACH_BB_FN (bb, fun)
+    {
+      gimple ret;
+      gimple_seq seq = bb_seq (bb);
+      ret = walk_gimple_seq (seq, inline_forbidden_p_stmt,
+			     inline_forbidden_p_op, &wi);
+      forbidden_p = (ret != NULL);
+      if (forbidden_p)
+	goto egress;
+    }
+
+  for (step = fun->local_decls; step; step = TREE_CHAIN (step))
+    {
+      tree decl = TREE_VALUE (step);
+      if (TREE_CODE (decl) == VAR_DECL
+	  && TREE_STATIC (decl)
+	  && !DECL_EXTERNAL (decl)
+	  && DECL_INITIAL (decl))
+        {
+	  tree ret;
+	  ret = walk_tree_without_duplicates (&DECL_INITIAL (decl),
+					      inline_forbidden_p_2, fndecl);
+	  forbidden_p = (ret != NULL);
+	  if (forbidden_p)
+	    goto egress;
+        }
+    }
+
+egress:
+  pointer_set_destroy (visited_nodes);
+  input_location = saved_loc;
+  return forbidden_p;
+}
+
+/* Returns nonzero if FN is a function that does not have any
+   fundamental inline blocking properties.  */
+
+static bool
+inlinable_function_p (tree fn)
+{
+  bool inlinable = true;
+  bool do_warning;
+  tree always_inline;
+
+  /* If we've already decided this function shouldn't be inlined,
+     there's no need to check again.  */
+  if (DECL_UNINLINABLE (fn))
+    return false;
+
+  /* We only warn for functions declared `inline' by the user.  */
+  do_warning = (warn_inline
+		&& DECL_DECLARED_INLINE_P (fn)
+		&& !DECL_NO_INLINE_WARNING_P (fn)
+		&& !DECL_IN_SYSTEM_HEADER (fn));
+
+  always_inline = lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn));
+
+  if (flag_no_inline
+      && always_inline == NULL)
+    {
+      if (do_warning)
+        warning (OPT_Winline, "function %q+F can never be inlined because it "
+                 "is suppressed using -fno-inline", fn);
+      inlinable = false;
+    }
+
+  /* Don't auto-inline anything that might not be bound within
+     this unit of translation.  */
+  else if (!DECL_DECLARED_INLINE_P (fn)
+	   && DECL_REPLACEABLE_P (fn))
+    inlinable = false;
+
+  else if (!function_attribute_inlinable_p (fn))
+    {
+      if (do_warning)
+        warning (OPT_Winline, "function %q+F can never be inlined because it "
+                 "uses attributes conflicting with inlining", fn);
+      inlinable = false;
+    }
+
+  else if (inline_forbidden_p (fn))
+    {
+      /* See if we should warn about uninlinable functions.  Previously,
+	 some of these warnings would be issued while trying to expand
+	 the function inline, but that would cause multiple warnings
+	 about functions that would for example call alloca.  But since
+	 this a property of the function, just one warning is enough.
+	 As a bonus we can now give more details about the reason why a
+	 function is not inlinable.  */
+      if (always_inline)
+	sorry (inline_forbidden_reason, fn);
+      else if (do_warning)
+	warning (OPT_Winline, inline_forbidden_reason, fn);
+
+      inlinable = false;
+    }
+
+  /* Squirrel away the result so that we don't have to check again.  */
+  DECL_UNINLINABLE (fn) = !inlinable;
+
+  return inlinable;
+}
+
+/* Estimate the cost of a memory move.  Use machine dependent
+   word size and take possible memcpy call into account.  */
+
+int
+estimate_move_cost (tree type)
+{
+  HOST_WIDE_INT size;
+
+  size = int_size_in_bytes (type);
+
+  if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO (!optimize_size))
+    /* Cost of a memcpy call, 3 arguments and the call.  */
+    return 4;
+  else
+    return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
+}
+
+/* Returns cost of operation CODE, according to WEIGHTS  */
+
+static int
+estimate_operator_cost (enum tree_code code, eni_weights *weights)
+{
+  switch (code)
+    {
+    /* These are "free" conversions, or their presumed cost
+       is folded into other operations.  */
+    case RANGE_EXPR:
+    CASE_CONVERT:
+    case COMPLEX_EXPR:
+    case PAREN_EXPR:
+      return 0;
+
+    /* Assign cost of 1 to usual operations.
+       ??? We may consider mapping RTL costs to this.  */
+    case COND_EXPR:
+    case VEC_COND_EXPR:
+
+    case PLUS_EXPR:
+    case POINTER_PLUS_EXPR:
+    case MINUS_EXPR:
+    case MULT_EXPR:
+
+    case FIXED_CONVERT_EXPR:
+    case FIX_TRUNC_EXPR:
+
+    case NEGATE_EXPR:
+    case FLOAT_EXPR:
+    case MIN_EXPR:
+    case MAX_EXPR:
+    case ABS_EXPR:
+
+    case LSHIFT_EXPR:
+    case RSHIFT_EXPR:
+    case LROTATE_EXPR:
+    case RROTATE_EXPR:
+    case VEC_LSHIFT_EXPR:
+    case VEC_RSHIFT_EXPR:
+
+    case BIT_IOR_EXPR:
+    case BIT_XOR_EXPR:
+    case BIT_AND_EXPR:
+    case BIT_NOT_EXPR:
+
+    case TRUTH_ANDIF_EXPR:
+    case TRUTH_ORIF_EXPR:
+    case TRUTH_AND_EXPR:
+    case TRUTH_OR_EXPR:
+    case TRUTH_XOR_EXPR:
+    case TRUTH_NOT_EXPR:
+
+    case LT_EXPR:
+    case LE_EXPR:
+    case GT_EXPR:
+    case GE_EXPR:
+    case EQ_EXPR:
+    case NE_EXPR:
+    case ORDERED_EXPR:
+    case UNORDERED_EXPR:
+
+    case UNLT_EXPR:
+    case UNLE_EXPR:
+    case UNGT_EXPR:
+    case UNGE_EXPR:
+    case UNEQ_EXPR:
+    case LTGT_EXPR:
+
+    case CONJ_EXPR:
+
+    case PREDECREMENT_EXPR:
+    case PREINCREMENT_EXPR:
+    case POSTDECREMENT_EXPR:
+    case POSTINCREMENT_EXPR:
+
+    case REALIGN_LOAD_EXPR:
+
+    case REDUC_MAX_EXPR:
+    case REDUC_MIN_EXPR:
+    case REDUC_PLUS_EXPR:
+    case WIDEN_SUM_EXPR:
+    case WIDEN_MULT_EXPR:
+    case DOT_PROD_EXPR:
+
+    case VEC_WIDEN_MULT_HI_EXPR:
+    case VEC_WIDEN_MULT_LO_EXPR:
+    case VEC_UNPACK_HI_EXPR:
+    case VEC_UNPACK_LO_EXPR:
+    case VEC_UNPACK_FLOAT_HI_EXPR:
+    case VEC_UNPACK_FLOAT_LO_EXPR:
+    case VEC_PACK_TRUNC_EXPR:
+    case VEC_PACK_SAT_EXPR:
+    case VEC_PACK_FIX_TRUNC_EXPR:
+    case VEC_EXTRACT_EVEN_EXPR:
+    case VEC_EXTRACT_ODD_EXPR:
+    case VEC_INTERLEAVE_HIGH_EXPR:
+    case VEC_INTERLEAVE_LOW_EXPR:
+
+      return 1;
+
+    /* Few special cases of expensive operations.  This is useful
+       to avoid inlining on functions having too many of these.  */
+    case TRUNC_DIV_EXPR:
+    case CEIL_DIV_EXPR:
+    case FLOOR_DIV_EXPR:
+    case ROUND_DIV_EXPR:
+    case EXACT_DIV_EXPR:
+    case TRUNC_MOD_EXPR:
+    case CEIL_MOD_EXPR:
+    case FLOOR_MOD_EXPR:
+    case ROUND_MOD_EXPR:
+    case RDIV_EXPR:
+      return weights->div_mod_cost;
+
+    default:
+      /* We expect a copy assignment with no operator.  */
+      gcc_assert (get_gimple_rhs_class (code) == GIMPLE_SINGLE_RHS);
+      return 0;
+    }
+}
+
+
+/* Estimate number of instructions that will be created by expanding
+   the statements in the statement sequence STMTS.
+   WEIGHTS contains weights attributed to various constructs.  */
+
+static
+int estimate_num_insns_seq (gimple_seq stmts, eni_weights *weights)
+{
+  int cost;
+  gimple_stmt_iterator gsi;
+
+  cost = 0;
+  for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi))
+    cost += estimate_num_insns (gsi_stmt (gsi), weights);
+
+  return cost;
+}
+
+
+/* Estimate number of instructions that will be created by expanding STMT.
+   WEIGHTS contains weights attributed to various constructs.  */
+
+int
+estimate_num_insns (gimple stmt, eni_weights *weights)
+{
+  unsigned cost, i;
+  enum gimple_code code = gimple_code (stmt);
+  tree lhs;
+
+  switch (code)
+    {
+    case GIMPLE_ASSIGN:
+      /* Try to estimate the cost of assignments.  We have three cases to
+	 deal with:
+	 1) Simple assignments to registers;
+	 2) Stores to things that must live in memory.  This includes
+	    "normal" stores to scalars, but also assignments of large
+	    structures, or constructors of big arrays;
+
+	 Let us look at the first two cases, assuming we have "a = b + C":
+	 <GIMPLE_ASSIGN <var_decl "a">
+	        <plus_expr <var_decl "b"> <constant C>>
+	 If "a" is a GIMPLE register, the assignment to it is free on almost
+	 any target, because "a" usually ends up in a real register.  Hence
+	 the only cost of this expression comes from the PLUS_EXPR, and we
+	 can ignore the GIMPLE_ASSIGN.
+	 If "a" is not a GIMPLE register, the assignment to "a" will most
+	 likely be a real store, so the cost of the GIMPLE_ASSIGN is the cost
+	 of moving something into "a", which we compute using the function
+	 estimate_move_cost.  */
+      lhs = gimple_assign_lhs (stmt);
+      if (is_gimple_reg (lhs))
+	cost = 0;
+      else
+	cost = estimate_move_cost (TREE_TYPE (lhs));
+
+      cost += estimate_operator_cost (gimple_assign_rhs_code (stmt), weights);
+      break;
+
+    case GIMPLE_COND:
+      cost = 1 + estimate_operator_cost (gimple_cond_code (stmt), weights);
+      break;
+
+    case GIMPLE_SWITCH:
+      /* Take into account cost of the switch + guess 2 conditional jumps for
+         each case label.  
+
+	 TODO: once the switch expansion logic is sufficiently separated, we can
+	 do better job on estimating cost of the switch.  */
+      cost = gimple_switch_num_labels (stmt) * 2;
+      break;
+
+    case GIMPLE_CALL:
+      {
+	tree decl = gimple_call_fndecl (stmt);
+	tree addr = gimple_call_fn (stmt);
+	tree funtype = TREE_TYPE (addr);
+
+	if (POINTER_TYPE_P (funtype))
+	  funtype = TREE_TYPE (funtype);
+
+	if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
+	  cost = weights->target_builtin_call_cost;
+	else
+	  cost = weights->call_cost;
+	
+	if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
+	  switch (DECL_FUNCTION_CODE (decl))
+	    {
+	    case BUILT_IN_CONSTANT_P:
+	      return 0;
+	    case BUILT_IN_EXPECT:
+	      cost = 0;
+	      break;
+
+	    /* Prefetch instruction is not expensive.  */
+	    case BUILT_IN_PREFETCH:
+	      cost = weights->target_builtin_call_cost;
+	      break;
+
+	    default:
+	      break;
+	    }
+
+	if (decl)
+	  funtype = TREE_TYPE (decl);
+
+	/* Our cost must be kept in sync with
+	   cgraph_estimate_size_after_inlining that does use function
+	   declaration to figure out the arguments.  */
+	if (decl && DECL_ARGUMENTS (decl))
+	  {
+	    tree arg;
+	    for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
+	      cost += estimate_move_cost (TREE_TYPE (arg));
+	  }
+	else if (funtype && prototype_p (funtype))
+	  {
+	    tree t;
+	    for (t = TYPE_ARG_TYPES (funtype); t; t = TREE_CHAIN (t))
+	      cost += estimate_move_cost (TREE_VALUE (t));
+	  }
+	else
+	  {
+	    for (i = 0; i < gimple_call_num_args (stmt); i++)
+	      {
+		tree arg = gimple_call_arg (stmt, i);
+		cost += estimate_move_cost (TREE_TYPE (arg));
+	      }
+	  }
+
+	break;
+      }
+
+    case GIMPLE_GOTO:
+    case GIMPLE_LABEL:
+    case GIMPLE_NOP:
+    case GIMPLE_PHI:
+    case GIMPLE_RETURN:
+    case GIMPLE_CHANGE_DYNAMIC_TYPE:
+    case GIMPLE_PREDICT:
+      return 0;
+
+    case GIMPLE_ASM:
+    case GIMPLE_RESX:
+      return 1;
+
+    case GIMPLE_BIND:
+      return estimate_num_insns_seq (gimple_bind_body (stmt), weights);
+
+    case GIMPLE_EH_FILTER:
+      return estimate_num_insns_seq (gimple_eh_filter_failure (stmt), weights);
+
+    case GIMPLE_CATCH:
+      return estimate_num_insns_seq (gimple_catch_handler (stmt), weights);
+
+    case GIMPLE_TRY:
+      return (estimate_num_insns_seq (gimple_try_eval (stmt), weights)
+              + estimate_num_insns_seq (gimple_try_cleanup (stmt), weights));
+
+    /* OpenMP directives are generally very expensive.  */
+
+    case GIMPLE_OMP_RETURN:
+    case GIMPLE_OMP_SECTIONS_SWITCH:
+    case GIMPLE_OMP_ATOMIC_STORE:
+    case GIMPLE_OMP_CONTINUE:
+      /* ...except these, which are cheap.  */
+      return 0;
+
+    case GIMPLE_OMP_ATOMIC_LOAD:
+      return weights->omp_cost;
+
+    case GIMPLE_OMP_FOR:
+      return (weights->omp_cost
+              + estimate_num_insns_seq (gimple_omp_body (stmt), weights)
+              + estimate_num_insns_seq (gimple_omp_for_pre_body (stmt), weights));
+
+    case GIMPLE_OMP_PARALLEL:
+    case GIMPLE_OMP_TASK:
+    case GIMPLE_OMP_CRITICAL:
+    case GIMPLE_OMP_MASTER:
+    case GIMPLE_OMP_ORDERED:
+    case GIMPLE_OMP_SECTION:
+    case GIMPLE_OMP_SECTIONS:
+    case GIMPLE_OMP_SINGLE:
+      return (weights->omp_cost
+              + estimate_num_insns_seq (gimple_omp_body (stmt), weights));
+
+    default:
+      gcc_unreachable ();
+    }
+
+  return cost;
+}
+
+/* Estimate number of instructions that will be created by expanding
+   function FNDECL.  WEIGHTS contains weights attributed to various
+   constructs.  */
+
+int
+estimate_num_insns_fn (tree fndecl, eni_weights *weights)
+{
+  struct function *my_function = DECL_STRUCT_FUNCTION (fndecl);
+  gimple_stmt_iterator bsi;
+  basic_block bb;
+  int n = 0;
+
+  gcc_assert (my_function && my_function->cfg);
+  FOR_EACH_BB_FN (bb, my_function)
+    {
+      for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
+	n += estimate_num_insns (gsi_stmt (bsi), weights);
+    }
+
+  return n;
+}
+
+
+/* Initializes weights used by estimate_num_insns.  */
+
+void
+init_inline_once (void)
+{
+  eni_inlining_weights.call_cost = PARAM_VALUE (PARAM_INLINE_CALL_COST);
+  eni_inlining_weights.target_builtin_call_cost = 1;
+  eni_inlining_weights.div_mod_cost = 10;
+  eni_inlining_weights.omp_cost = 40;
+
+  eni_size_weights.call_cost = 1;
+  eni_size_weights.target_builtin_call_cost = 1;
+  eni_size_weights.div_mod_cost = 1;
+  eni_size_weights.omp_cost = 40;
+
+  /* Estimating time for call is difficult, since we have no idea what the
+     called function does.  In the current uses of eni_time_weights,
+     underestimating the cost does less harm than overestimating it, so
+     we choose a rather small value here.  */
+  eni_time_weights.call_cost = 10;
+  eni_time_weights.target_builtin_call_cost = 10;
+  eni_time_weights.div_mod_cost = 10;
+  eni_time_weights.omp_cost = 40;
+}
+
+/* Estimate the number of instructions in a gimple_seq. */
+
+int
+count_insns_seq (gimple_seq seq, eni_weights *weights)
+{
+  gimple_stmt_iterator gsi;
+  int n = 0;
+  for (gsi = gsi_start (seq); !gsi_end_p (gsi); gsi_next (&gsi))
+    n += estimate_num_insns (gsi_stmt (gsi), weights);
+
+  return n;
+}
+
+
+/* Install new lexical TREE_BLOCK underneath 'current_block'.  */
+
+static void
+prepend_lexical_block (tree current_block, tree new_block)
+{
+  BLOCK_CHAIN (new_block) = BLOCK_SUBBLOCKS (current_block);
+  BLOCK_SUBBLOCKS (current_block) = new_block;
+  BLOCK_SUPERCONTEXT (new_block) = current_block;
+}
+
+/* Fetch callee declaration from the call graph edge going from NODE and
+   associated with STMR call statement.  Return NULL_TREE if not found.  */
+static tree
+get_indirect_callee_fndecl (struct cgraph_node *node, gimple stmt)
+{
+  struct cgraph_edge *cs;
+
+  cs = cgraph_edge (node, stmt);
+  if (cs)
+    return cs->callee->decl;
+
+  return NULL_TREE;
+}
+
+/* If STMT is a GIMPLE_CALL, replace it with its inline expansion.  */
+
+static bool
+expand_call_inline (basic_block bb, gimple stmt, copy_body_data *id)
+{
+  tree retvar, use_retvar;
+  tree fn;
+  struct pointer_map_t *st;
+  tree return_slot;
+  tree modify_dest;
+  location_t saved_location;
+  struct cgraph_edge *cg_edge;
+  const char *reason;
+  basic_block return_block;
+  edge e;
+  gimple_stmt_iterator gsi, stmt_gsi;
+  bool successfully_inlined = FALSE;
+  bool purge_dead_abnormal_edges;
+  tree t_step;
+  tree var;
+
+  /* Set input_location here so we get the right instantiation context
+     if we call instantiate_decl from inlinable_function_p.  */
+  saved_location = input_location;
+  if (gimple_has_location (stmt))
+    input_location = gimple_location (stmt);
+
+  /* From here on, we're only interested in CALL_EXPRs.  */
+  if (gimple_code (stmt) != GIMPLE_CALL)
+    goto egress;
+
+  /* First, see if we can figure out what function is being called.
+     If we cannot, then there is no hope of inlining the function.  */
+  fn = gimple_call_fndecl (stmt);
+  if (!fn)
+    {
+      fn = get_indirect_callee_fndecl (id->dst_node, stmt);
+      if (!fn)
+	goto egress;
+    }
+
+  /* Turn forward declarations into real ones.  */
+  fn = cgraph_node (fn)->decl;
+
+  /* If FN is a declaration of a function in a nested scope that was
+     globally declared inline, we don't set its DECL_INITIAL.
+     However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the
+     C++ front-end uses it for cdtors to refer to their internal
+     declarations, that are not real functions.  Fortunately those
+     don't have trees to be saved, so we can tell by checking their
+     gimple_body.  */
+  if (!DECL_INITIAL (fn)
+      && DECL_ABSTRACT_ORIGIN (fn)
+      && gimple_has_body_p (DECL_ABSTRACT_ORIGIN (fn)))
+    fn = DECL_ABSTRACT_ORIGIN (fn);
+
+  /* Objective C and fortran still calls tree_rest_of_compilation directly.
+     Kill this check once this is fixed.  */
+  if (!id->dst_node->analyzed)
+    goto egress;
+
+  cg_edge = cgraph_edge (id->dst_node, stmt);
+
+  /* Constant propagation on argument done during previous inlining
+     may create new direct call.  Produce an edge for it.  */
+  if (!cg_edge)
+    {
+      struct cgraph_node *dest = cgraph_node (fn);
+
+      /* We have missing edge in the callgraph.  This can happen in one case
+         where previous inlining turned indirect call into direct call by
+         constant propagating arguments.  In all other cases we hit a bug
+         (incorrect node sharing is most common reason for missing edges.  */
+      gcc_assert (dest->needed);
+      cgraph_create_edge (id->dst_node, dest, stmt,
+			  bb->count, CGRAPH_FREQ_BASE,
+			  bb->loop_depth)->inline_failed
+	= N_("originally indirect function call not considered for inlining");
+      if (dump_file)
+	{
+	   fprintf (dump_file, "Created new direct edge to %s",
+		    cgraph_node_name (dest));
+	}
+      goto egress;
+    }
+
+  /* Don't try to inline functions that are not well-suited to
+     inlining.  */
+  if (!cgraph_inline_p (cg_edge, &reason))
+    {
+      /* If this call was originally indirect, we do not want to emit any
+	 inlining related warnings or sorry messages because there are no
+	 guarantees regarding those.  */
+      if (cg_edge->indirect_call)
+	goto egress;
+
+      if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))
+	  /* Avoid warnings during early inline pass. */
+	  && cgraph_global_info_ready)
+	{
+	  sorry ("inlining failed in call to %q+F: %s", fn, reason);
+	  sorry ("called from here");
+	}
+      else if (warn_inline && DECL_DECLARED_INLINE_P (fn)
+	       && !DECL_IN_SYSTEM_HEADER (fn)
+	       && strlen (reason)
+	       && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn))
+	       /* Avoid warnings during early inline pass. */
+	       && cgraph_global_info_ready)
+	{
+	  warning (OPT_Winline, "inlining failed in call to %q+F: %s",
+		   fn, reason);
+	  warning (OPT_Winline, "called from here");
+	}
+      goto egress;
+    }
+  fn = cg_edge->callee->decl;
+
+#ifdef ENABLE_CHECKING
+  if (cg_edge->callee->decl != id->dst_node->decl)
+    verify_cgraph_node (cg_edge->callee);
+#endif
+
+  /* We will be inlining this callee.  */
+  id->eh_region = lookup_stmt_eh_region (stmt);
+
+  /* Split the block holding the GIMPLE_CALL.  */
+  e = split_block (bb, stmt);
+  bb = e->src;
+  return_block = e->dest;
+  remove_edge (e);
+
+  /* split_block splits after the statement; work around this by
+     moving the call into the second block manually.  Not pretty,
+     but seems easier than doing the CFG manipulation by hand
+     when the GIMPLE_CALL is in the last statement of BB.  */
+  stmt_gsi = gsi_last_bb (bb);
+  gsi_remove (&stmt_gsi, false);
+
+  /* If the GIMPLE_CALL was in the last statement of BB, it may have
+     been the source of abnormal edges.  In this case, schedule
+     the removal of dead abnormal edges.  */
+  gsi = gsi_start_bb (return_block);
+  if (gsi_end_p (gsi))
+    {
+      gsi_insert_after (&gsi, stmt, GSI_NEW_STMT);
+      purge_dead_abnormal_edges = true;
+    }
+  else
+    {
+      gsi_insert_before (&gsi, stmt, GSI_NEW_STMT);
+      purge_dead_abnormal_edges = false;
+    }
+
+  stmt_gsi = gsi_start_bb (return_block);
+
+  /* Build a block containing code to initialize the arguments, the
+     actual inline expansion of the body, and a label for the return
+     statements within the function to jump to.  The type of the
+     statement expression is the return type of the function call.  */
+  id->block = make_node (BLOCK);
+  BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
+  BLOCK_SOURCE_LOCATION (id->block) = input_location;
+  prepend_lexical_block (gimple_block (stmt), id->block);
+
+  /* Local declarations will be replaced by their equivalents in this
+     map.  */
+  st = id->decl_map;
+  id->decl_map = pointer_map_create ();
+
+  /* Record the function we are about to inline.  */
+  id->src_fn = fn;
+  id->src_node = cg_edge->callee;
+  id->src_cfun = DECL_STRUCT_FUNCTION (fn);
+  id->gimple_call = stmt;
+
+  gcc_assert (!id->src_cfun->after_inlining);
+
+  id->entry_bb = bb;
+  if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn)))
+    {
+      gimple_stmt_iterator si = gsi_last_bb (bb);
+      gsi_insert_after (&si, gimple_build_predict (PRED_COLD_FUNCTION,
+      						   NOT_TAKEN),
+			GSI_NEW_STMT);
+    }
+  initialize_inlined_parameters (id, stmt, fn, bb);
+
+  if (DECL_INITIAL (fn))
+    prepend_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id));
+
+  /* Return statements in the function body will be replaced by jumps
+     to the RET_LABEL.  */
+  gcc_assert (DECL_INITIAL (fn));
+  gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK);
+
+  /* Find the LHS to which the result of this call is assigned.  */
+  return_slot = NULL;
+  if (gimple_call_lhs (stmt))
+    {
+      modify_dest = gimple_call_lhs (stmt);
+
+      /* The function which we are inlining might not return a value,
+	 in which case we should issue a warning that the function
+	 does not return a value.  In that case the optimizers will
+	 see that the variable to which the value is assigned was not
+	 initialized.  We do not want to issue a warning about that
+	 uninitialized variable.  */
+      if (DECL_P (modify_dest))
+	TREE_NO_WARNING (modify_dest) = 1;
+
+      if (gimple_call_return_slot_opt_p (stmt))
+	{
+	  return_slot = modify_dest;
+	  modify_dest = NULL;
+	}
+    }
+  else
+    modify_dest = NULL;
+
+  /* If we are inlining a call to the C++ operator new, we don't want
+     to use type based alias analysis on the return value.  Otherwise
+     we may get confused if the compiler sees that the inlined new
+     function returns a pointer which was just deleted.  See bug
+     33407.  */
+  if (DECL_IS_OPERATOR_NEW (fn))
+    {
+      return_slot = NULL;
+      modify_dest = NULL;
+    }
+
+  /* Declare the return variable for the function.  */
+  retvar = declare_return_variable (id, return_slot, modify_dest, &use_retvar);
+
+  if (DECL_IS_OPERATOR_NEW (fn))
+    {
+      gcc_assert (TREE_CODE (retvar) == VAR_DECL
+		  && POINTER_TYPE_P (TREE_TYPE (retvar)));
+      DECL_NO_TBAA_P (retvar) = 1;
+    }
+
+  /* Add local vars in this inlined callee to caller.  */
+  t_step = id->src_cfun->local_decls;
+  for (; t_step; t_step = TREE_CHAIN (t_step))
+    {
+      var = TREE_VALUE (t_step);
+      if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
+	{
+	  if (var_ann (var) && add_referenced_var (var))
+	    cfun->local_decls = tree_cons (NULL_TREE, var,
+					   cfun->local_decls);
+	}
+      else if (!can_be_nonlocal (var, id))
+	cfun->local_decls = tree_cons (NULL_TREE, remap_decl (var, id),
+				       cfun->local_decls);
+    }
+
+  /* This is it.  Duplicate the callee body.  Assume callee is
+     pre-gimplified.  Note that we must not alter the caller
+     function in any way before this point, as this CALL_EXPR may be
+     a self-referential call; if we're calling ourselves, we need to
+     duplicate our body before altering anything.  */
+  copy_body (id, bb->count, bb->frequency, bb, return_block);
+
+  /* Clean up.  */
+  pointer_map_destroy (id->decl_map);
+  id->decl_map = st;
+
+  /* If the inlined function returns a result that we care about,
+     substitute the GIMPLE_CALL with an assignment of the return
+     variable to the LHS of the call.  That is, if STMT was
+     'a = foo (...)', substitute the call with 'a = USE_RETVAR'.  */
+  if (use_retvar && gimple_call_lhs (stmt))
+    {
+      gimple old_stmt = stmt;
+      stmt = gimple_build_assign (gimple_call_lhs (stmt), use_retvar);
+      gsi_replace (&stmt_gsi, stmt, false);
+      if (gimple_in_ssa_p (cfun))
+	{
+          update_stmt (stmt);
+          mark_symbols_for_renaming (stmt);
+	}
+      maybe_clean_or_replace_eh_stmt (old_stmt, stmt);
+    }
+  else
+    {
+      /* Handle the case of inlining a function with no return
+	 statement, which causes the return value to become undefined.  */
+      if (gimple_call_lhs (stmt)
+	  && TREE_CODE (gimple_call_lhs (stmt)) == SSA_NAME)
+	{
+	  tree name = gimple_call_lhs (stmt);
+	  tree var = SSA_NAME_VAR (name);
+	  tree def = gimple_default_def (cfun, var);
+
+	  if (def)
+	    {
+	      /* If the variable is used undefined, make this name
+		 undefined via a move.  */
+	      stmt = gimple_build_assign (gimple_call_lhs (stmt), def);
+	      gsi_replace (&stmt_gsi, stmt, true);
+	      update_stmt (stmt);
+	    }
+	  else
+	    {
+	      /* Otherwise make this variable undefined.  */
+	      gsi_remove (&stmt_gsi, true);
+	      set_default_def (var, name);
+	      SSA_NAME_DEF_STMT (name) = gimple_build_nop ();
+	    }
+	}
+      else
+        gsi_remove (&stmt_gsi, true);
+    }
+
+  if (purge_dead_abnormal_edges)
+    gimple_purge_dead_abnormal_call_edges (return_block);
+
+  /* If the value of the new expression is ignored, that's OK.  We
+     don't warn about this for CALL_EXPRs, so we shouldn't warn about
+     the equivalent inlined version either.  */
+  if (is_gimple_assign (stmt))
+    {
+      gcc_assert (gimple_assign_single_p (stmt)
+		  || CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt)));
+      TREE_USED (gimple_assign_rhs1 (stmt)) = 1;
+    }
+
+  /* Output the inlining info for this abstract function, since it has been
+     inlined.  If we don't do this now, we can lose the information about the
+     variables in the function when the blocks get blown away as soon as we
+     remove the cgraph node.  */
+  (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl);
+
+  /* Update callgraph if needed.  */
+  cgraph_remove_node (cg_edge->callee);
+
+  id->block = NULL_TREE;
+  successfully_inlined = TRUE;
+
+ egress:
+  input_location = saved_location;
+  return successfully_inlined;
+}
+
+/* Expand call statements reachable from STMT_P.
+   We can only have CALL_EXPRs as the "toplevel" tree code or nested
+   in a MODIFY_EXPR.  See tree-gimple.c:get_call_expr_in().  We can
+   unfortunately not use that function here because we need a pointer
+   to the CALL_EXPR, not the tree itself.  */
+
+static bool
+gimple_expand_calls_inline (basic_block bb, copy_body_data *id)
+{
+  gimple_stmt_iterator gsi;
+
+  for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
+    {
+      gimple stmt = gsi_stmt (gsi);
+
+      if (is_gimple_call (stmt)
+	  && expand_call_inline (bb, stmt, id))
+	return true;
+    }
+
+  return false;
+}
+
+
+/* Walk all basic blocks created after FIRST and try to fold every statement
+   in the STATEMENTS pointer set.  */
+
+static void
+fold_marked_statements (int first, struct pointer_set_t *statements)
+{
+  for (; first < n_basic_blocks; first++)
+    if (BASIC_BLOCK (first))
+      {
+        gimple_stmt_iterator gsi;
+
+	for (gsi = gsi_start_bb (BASIC_BLOCK (first));
+	     !gsi_end_p (gsi);
+	     gsi_next (&gsi))
+	  if (pointer_set_contains (statements, gsi_stmt (gsi)))
+	    {
+	      gimple old_stmt = gsi_stmt (gsi);
+
+	      if (fold_stmt (&gsi))
+		{
+		  /* Re-read the statement from GSI as fold_stmt() may
+		     have changed it.  */
+		  gimple new_stmt = gsi_stmt (gsi);
+		  update_stmt (new_stmt);
+
+		  if (is_gimple_call (old_stmt))
+		    cgraph_update_edges_for_call_stmt (old_stmt, new_stmt);
+
+		  if (maybe_clean_or_replace_eh_stmt (old_stmt, new_stmt))
+		    gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
+		}
+	    }
+      }
+}
+
+/* Return true if BB has at least one abnormal outgoing edge.  */
+
+static inline bool
+has_abnormal_outgoing_edge_p (basic_block bb)
+{
+  edge e;
+  edge_iterator ei;
+
+  FOR_EACH_EDGE (e, ei, bb->succs)
+    if (e->flags & EDGE_ABNORMAL)
+      return true;
+
+  return false;
+}
+
+/* Expand calls to inline functions in the body of FN.  */
+
+unsigned int
+optimize_inline_calls (tree fn)
+{
+  copy_body_data id;
+  tree prev_fn;
+  basic_block bb;
+  int last = n_basic_blocks;
+  struct gimplify_ctx gctx;
+
+  /* There is no point in performing inlining if errors have already
+     occurred -- and we might crash if we try to inline invalid
+     code.  */
+  if (errorcount || sorrycount)
+    return 0;
+
+  /* Clear out ID.  */
+  memset (&id, 0, sizeof (id));
+
+  id.src_node = id.dst_node = cgraph_node (fn);
+  id.dst_fn = fn;
+  /* Or any functions that aren't finished yet.  */
+  prev_fn = NULL_TREE;
+  if (current_function_decl)
+    {
+      id.dst_fn = current_function_decl;
+      prev_fn = current_function_decl;
+    }
+
+  id.copy_decl = copy_decl_maybe_to_var;
+  id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+  id.transform_new_cfg = false;
+  id.transform_return_to_modify = true;
+  id.transform_lang_insert_block = NULL;
+  id.statements_to_fold = pointer_set_create ();
+
+  push_gimplify_context (&gctx);
+
+  /* We make no attempts to keep dominance info up-to-date.  */
+  free_dominance_info (CDI_DOMINATORS);
+  free_dominance_info (CDI_POST_DOMINATORS);
+
+  /* Register specific gimple functions.  */
+  gimple_register_cfg_hooks ();
+
+  /* Reach the trees by walking over the CFG, and note the
+     enclosing basic-blocks in the call edges.  */
+  /* We walk the blocks going forward, because inlined function bodies
+     will split id->current_basic_block, and the new blocks will
+     follow it; we'll trudge through them, processing their CALL_EXPRs
+     along the way.  */
+  FOR_EACH_BB (bb)
+    gimple_expand_calls_inline (bb, &id);
+
+  pop_gimplify_context (NULL);
+
+#ifdef ENABLE_CHECKING
+    {
+      struct cgraph_edge *e;
+
+      verify_cgraph_node (id.dst_node);
+
+      /* Double check that we inlined everything we are supposed to inline.  */
+      for (e = id.dst_node->callees; e; e = e->next_callee)
+	gcc_assert (e->inline_failed);
+    }
+#endif
+  
+  /* Fold the statements before compacting/renumbering the basic blocks.  */
+  fold_marked_statements (last, id.statements_to_fold);
+  pointer_set_destroy (id.statements_to_fold);
+  
+  /* Renumber the (code) basic_blocks consecutively.  */
+  compact_blocks ();
+  /* Renumber the lexical scoping (non-code) blocks consecutively.  */
+  number_blocks (fn);
+
+  /* We are not going to maintain the cgraph edges up to date.
+     Kill it so it won't confuse us.  */
+  cgraph_node_remove_callees (id.dst_node);
+
+  fold_cond_expr_cond ();
+
+  /* It would be nice to check SSA/CFG/statement consistency here, but it is
+     not possible yet - the IPA passes might make various functions to not
+     throw and they don't care to proactively update local EH info.  This is
+     done later in fixup_cfg pass that also execute the verification.  */
+  return (TODO_update_ssa
+	  | TODO_cleanup_cfg
+	  | (gimple_in_ssa_p (cfun) ? TODO_remove_unused_locals : 0)
+	  | (profile_status != PROFILE_ABSENT ? TODO_rebuild_frequencies : 0));
+}
+
+/* Passed to walk_tree.  Copies the node pointed to, if appropriate.  */
+
+tree
+copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
+{
+  enum tree_code code = TREE_CODE (*tp);
+  enum tree_code_class cl = TREE_CODE_CLASS (code);
+
+  /* We make copies of most nodes.  */
+  if (IS_EXPR_CODE_CLASS (cl)
+      || code == TREE_LIST
+      || code == TREE_VEC
+      || code == TYPE_DECL
+      || code == OMP_CLAUSE)
+    {
+      /* Because the chain gets clobbered when we make a copy, we save it
+	 here.  */
+      tree chain = NULL_TREE, new_tree;
+
+      chain = TREE_CHAIN (*tp);
+
+      /* Copy the node.  */
+      new_tree = copy_node (*tp);
+
+      /* Propagate mudflap marked-ness.  */
+      if (flag_mudflap && mf_marked_p (*tp))
+        mf_mark (new_tree);
+
+      *tp = new_tree;
+
+      /* Now, restore the chain, if appropriate.  That will cause
+	 walk_tree to walk into the chain as well.  */
+      if (code == PARM_DECL
+	  || code == TREE_LIST
+	  || code == OMP_CLAUSE)
+	TREE_CHAIN (*tp) = chain;
+
+      /* For now, we don't update BLOCKs when we make copies.  So, we
+	 have to nullify all BIND_EXPRs.  */
+      if (TREE_CODE (*tp) == BIND_EXPR)
+	BIND_EXPR_BLOCK (*tp) = NULL_TREE;
+    }
+  else if (code == CONSTRUCTOR)
+    {
+      /* CONSTRUCTOR nodes need special handling because
+         we need to duplicate the vector of elements.  */
+      tree new_tree;
+
+      new_tree = copy_node (*tp);
+
+      /* Propagate mudflap marked-ness.  */
+      if (flag_mudflap && mf_marked_p (*tp))
+        mf_mark (new_tree);
+
+      CONSTRUCTOR_ELTS (new_tree) = VEC_copy (constructor_elt, gc,
+					 CONSTRUCTOR_ELTS (*tp));
+      *tp = new_tree;
+    }
+  else if (TREE_CODE_CLASS (code) == tcc_type)
+    *walk_subtrees = 0;
+  else if (TREE_CODE_CLASS (code) == tcc_declaration)
+    *walk_subtrees = 0;
+  else if (TREE_CODE_CLASS (code) == tcc_constant)
+    *walk_subtrees = 0;
+  else
+    gcc_assert (code != STATEMENT_LIST);
+  return NULL_TREE;
+}
+
+/* The SAVE_EXPR pointed to by TP is being copied.  If ST contains
+   information indicating to what new SAVE_EXPR this one should be mapped,
+   use that one.  Otherwise, create a new node and enter it in ST.  FN is
+   the function into which the copy will be placed.  */
+
+static void
+remap_save_expr (tree *tp, void *st_, int *walk_subtrees)
+{
+  struct pointer_map_t *st = (struct pointer_map_t *) st_;
+  tree *n;
+  tree t;
+
+  /* See if we already encountered this SAVE_EXPR.  */
+  n = (tree *) pointer_map_contains (st, *tp);
+
+  /* If we didn't already remap this SAVE_EXPR, do so now.  */
+  if (!n)
+    {
+      t = copy_node (*tp);
+
+      /* Remember this SAVE_EXPR.  */
+      *pointer_map_insert (st, *tp) = t;
+      /* Make sure we don't remap an already-remapped SAVE_EXPR.  */
+      *pointer_map_insert (st, t) = t;
+    }
+  else
+    {
+      /* We've already walked into this SAVE_EXPR; don't do it again.  */
+      *walk_subtrees = 0;
+      t = *n;
+    }
+
+  /* Replace this SAVE_EXPR with the copy.  */
+  *tp = t;
+}
+
+/* Called via walk_tree.  If *TP points to a DECL_STMT for a local label,
+   copies the declaration and enters it in the splay_tree in DATA (which is
+   really an `copy_body_data *').  */
+
+static tree
+mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
+			void *data)
+{
+  copy_body_data *id = (copy_body_data *) data;
+
+  /* Don't walk into types.  */
+  if (TYPE_P (*tp))
+    *walk_subtrees = 0;
+
+  else if (TREE_CODE (*tp) == LABEL_EXPR)
+    {
+      tree decl = TREE_OPERAND (*tp, 0);
+
+      /* Copy the decl and remember the copy.  */
+      insert_decl_map (id, decl, id->copy_decl (decl, id));
+    }
+
+  return NULL_TREE;
+}
+
+/* Perform any modifications to EXPR required when it is unsaved.  Does
+   not recurse into EXPR's subtrees.  */
+
+static void
+unsave_expr_1 (tree expr)
+{
+  switch (TREE_CODE (expr))
+    {
+    case TARGET_EXPR:
+      /* Don't mess with a TARGET_EXPR that hasn't been expanded.
+         It's OK for this to happen if it was part of a subtree that
+         isn't immediately expanded, such as operand 2 of another
+         TARGET_EXPR.  */
+      if (TREE_OPERAND (expr, 1))
+	break;
+
+      TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
+      TREE_OPERAND (expr, 3) = NULL_TREE;
+      break;
+
+    default:
+      break;
+    }
+}
+
+/* Called via walk_tree when an expression is unsaved.  Using the
+   splay_tree pointed to by ST (which is really a `splay_tree'),
+   remaps all local declarations to appropriate replacements.  */
+
+static tree
+unsave_r (tree *tp, int *walk_subtrees, void *data)
+{
+  copy_body_data *id = (copy_body_data *) data;
+  struct pointer_map_t *st = id->decl_map;
+  tree *n;
+
+  /* Only a local declaration (variable or label).  */
+  if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp))
+      || TREE_CODE (*tp) == LABEL_DECL)
+    {
+      /* Lookup the declaration.  */
+      n = (tree *) pointer_map_contains (st, *tp);
+
+      /* If it's there, remap it.  */
+      if (n)
+	*tp = *n;
+    }
+
+  else if (TREE_CODE (*tp) == STATEMENT_LIST)
+    gcc_unreachable ();
+  else if (TREE_CODE (*tp) == BIND_EXPR)
+    copy_bind_expr (tp, walk_subtrees, id);
+  else if (TREE_CODE (*tp) == SAVE_EXPR)
+    remap_save_expr (tp, st, walk_subtrees);
+  else
+    {
+      copy_tree_r (tp, walk_subtrees, NULL);
+
+      /* Do whatever unsaving is required.  */
+      unsave_expr_1 (*tp);
+    }
+
+  /* Keep iterating.  */
+  return NULL_TREE;
+}
+
+/* Copies everything in EXPR and replaces variables, labels
+   and SAVE_EXPRs local to EXPR.  */
+
+tree
+unsave_expr_now (tree expr)
+{
+  copy_body_data id;
+
+  /* There's nothing to do for NULL_TREE.  */
+  if (expr == 0)
+    return expr;
+
+  /* Set up ID.  */
+  memset (&id, 0, sizeof (id));
+  id.src_fn = current_function_decl;
+  id.dst_fn = current_function_decl;
+  id.decl_map = pointer_map_create ();
+
+  id.copy_decl = copy_decl_no_change;
+  id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+  id.transform_new_cfg = false;
+  id.transform_return_to_modify = false;
+  id.transform_lang_insert_block = NULL;
+
+  /* Walk the tree once to find local labels.  */
+  walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id);
+
+  /* Walk the tree again, copying, remapping, and unsaving.  */
+  walk_tree (&expr, unsave_r, &id, NULL);
+
+  /* Clean up.  */
+  pointer_map_destroy (id.decl_map);
+
+  return expr;
+}
+
+/* Called via walk_gimple_seq.  If *GSIP points to a GIMPLE_LABEL for a local
+   label, copies the declaration and enters it in the splay_tree in DATA (which
+   is really a 'copy_body_data *'.  */
+
+static tree
+mark_local_labels_stmt (gimple_stmt_iterator *gsip,
+		        bool *handled_ops_p ATTRIBUTE_UNUSED,
+		        struct walk_stmt_info *wi)
+{
+  copy_body_data *id = (copy_body_data *) wi->info;
+  gimple stmt = gsi_stmt (*gsip);
+
+  if (gimple_code (stmt) == GIMPLE_LABEL)
+    {
+      tree decl = gimple_label_label (stmt);
+
+      /* Copy the decl and remember the copy.  */
+      insert_decl_map (id, decl, id->copy_decl (decl, id));
+    }
+
+  return NULL_TREE;
+}
+
+
+/* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
+   Using the splay_tree pointed to by ST (which is really a `splay_tree'),
+   remaps all local declarations to appropriate replacements in gimple
+   operands. */
+
+static tree
+replace_locals_op (tree *tp, int *walk_subtrees, void *data)
+{
+  struct walk_stmt_info *wi = (struct walk_stmt_info*) data;
+  copy_body_data *id = (copy_body_data *) wi->info;
+  struct pointer_map_t *st = id->decl_map;
+  tree *n;
+  tree expr = *tp;
+
+  /* Only a local declaration (variable or label).  */
+  if ((TREE_CODE (expr) == VAR_DECL
+       && !TREE_STATIC (expr))
+      || TREE_CODE (expr) == LABEL_DECL)
+    {
+      /* Lookup the declaration.  */
+      n = (tree *) pointer_map_contains (st, expr);
+
+      /* If it's there, remap it.  */
+      if (n)
+	*tp = *n;
+      *walk_subtrees = 0;
+    }
+  else if (TREE_CODE (expr) == STATEMENT_LIST
+	   || TREE_CODE (expr) == BIND_EXPR
+	   || TREE_CODE (expr) == SAVE_EXPR)
+    gcc_unreachable ();
+  else if (TREE_CODE (expr) == TARGET_EXPR)
+    {
+      /* Don't mess with a TARGET_EXPR that hasn't been expanded.
+         It's OK for this to happen if it was part of a subtree that
+         isn't immediately expanded, such as operand 2 of another
+         TARGET_EXPR.  */
+      if (!TREE_OPERAND (expr, 1))
+	{
+	  TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
+	  TREE_OPERAND (expr, 3) = NULL_TREE;
+	}
+    }
+
+  /* Keep iterating.  */
+  return NULL_TREE;
+}
+
+
+/* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
+   Using the splay_tree pointed to by ST (which is really a `splay_tree'),
+   remaps all local declarations to appropriate replacements in gimple
+   statements. */
+
+static tree
+replace_locals_stmt (gimple_stmt_iterator *gsip,
+		     bool *handled_ops_p ATTRIBUTE_UNUSED,
+		     struct walk_stmt_info *wi)
+{
+  copy_body_data *id = (copy_body_data *) wi->info;
+  gimple stmt = gsi_stmt (*gsip);
+
+  if (gimple_code (stmt) == GIMPLE_BIND)
+    {
+      tree block = gimple_bind_block (stmt);
+
+      if (block)
+	{
+	  remap_block (&block, id);
+	  gimple_bind_set_block (stmt, block);
+	}
+
+      /* This will remap a lot of the same decls again, but this should be
+	 harmless.  */
+      if (gimple_bind_vars (stmt))
+	gimple_bind_set_vars (stmt, remap_decls (gimple_bind_vars (stmt), NULL, id));
+    }
+
+  /* Keep iterating.  */
+  return NULL_TREE;
+}
+
+
+/* Copies everything in SEQ and replaces variables and labels local to
+   current_function_decl.  */
+
+gimple_seq
+copy_gimple_seq_and_replace_locals (gimple_seq seq)
+{
+  copy_body_data id;
+  struct walk_stmt_info wi;
+  struct pointer_set_t *visited;
+  gimple_seq copy;
+
+  /* There's nothing to do for NULL_TREE.  */
+  if (seq == NULL)
+    return seq;
+
+  /* Set up ID.  */
+  memset (&id, 0, sizeof (id));
+  id.src_fn = current_function_decl;
+  id.dst_fn = current_function_decl;
+  id.decl_map = pointer_map_create ();
+
+  id.copy_decl = copy_decl_no_change;
+  id.transform_call_graph_edges = CB_CGE_DUPLICATE;
+  id.transform_new_cfg = false;
+  id.transform_return_to_modify = false;
+  id.transform_lang_insert_block = NULL;
+
+  /* Walk the tree once to find local labels.  */
+  memset (&wi, 0, sizeof (wi));
+  visited = pointer_set_create ();
+  wi.info = &id;
+  wi.pset = visited;
+  walk_gimple_seq (seq, mark_local_labels_stmt, NULL, &wi);
+  pointer_set_destroy (visited);
+
+  copy = gimple_seq_copy (seq);
+
+  /* Walk the copy, remapping decls.  */
+  memset (&wi, 0, sizeof (wi));
+  wi.info = &id;
+  walk_gimple_seq (copy, replace_locals_stmt, replace_locals_op, &wi);
+
+  /* Clean up.  */
+  pointer_map_destroy (id.decl_map);
+
+  return copy;
+}
+
+
+/* Allow someone to determine if SEARCH is a child of TOP from gdb.  */
+
+static tree
+debug_find_tree_1 (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, void *data)
+{
+  if (*tp == data)
+    return (tree) data;
+  else
+    return NULL;
+}
+
+bool
+debug_find_tree (tree top, tree search)
+{
+  return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0;
+}
+
+
+/* Declare the variables created by the inliner.  Add all the variables in
+   VARS to BIND_EXPR.  */
+
+static void
+declare_inline_vars (tree block, tree vars)
+{
+  tree t;
+  for (t = vars; t; t = TREE_CHAIN (t))
+    {
+      DECL_SEEN_IN_BIND_EXPR_P (t) = 1;
+      gcc_assert (!TREE_STATIC (t) && !TREE_ASM_WRITTEN (t));
+      cfun->local_decls = tree_cons (NULL_TREE, t, cfun->local_decls);
+    }
+
+  if (block)
+    BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars);
+}
+
+/* Copy NODE (which must be a DECL).  The DECL originally was in the FROM_FN,
+   but now it will be in the TO_FN.  PARM_TO_VAR means enable PARM_DECL to
+   VAR_DECL translation.  */
+
+static tree
+copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy)
+{
+  /* Don't generate debug information for the copy if we wouldn't have
+     generated it for the copy either.  */
+  DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl);
+  DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl);
+
+  /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
+     declaration inspired this copy.  */ 
+  DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
+
+  /* The new variable/label has no RTL, yet.  */
+  if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL)
+      && !TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
+    SET_DECL_RTL (copy, NULL_RTX);
+  
+  /* These args would always appear unused, if not for this.  */
+  TREE_USED (copy) = 1;
+
+  /* Set the context for the new declaration.  */
+  if (!DECL_CONTEXT (decl))
+    /* Globals stay global.  */
+    ;
+  else if (DECL_CONTEXT (decl) != id->src_fn)
+    /* Things that weren't in the scope of the function we're inlining
+       from aren't in the scope we're inlining to, either.  */
+    ;
+  else if (TREE_STATIC (decl))
+    /* Function-scoped static variables should stay in the original
+       function.  */
+    ;
+  else
+    /* Ordinary automatic local variables are now in the scope of the
+       new function.  */
+    DECL_CONTEXT (copy) = id->dst_fn;
+
+  return copy;
+}
+
+static tree
+copy_decl_to_var (tree decl, copy_body_data *id)
+{
+  tree copy, type;
+
+  gcc_assert (TREE_CODE (decl) == PARM_DECL
+	      || TREE_CODE (decl) == RESULT_DECL);
+
+  type = TREE_TYPE (decl);
+
+  copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
+  TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
+  TREE_READONLY (copy) = TREE_READONLY (decl);
+  TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
+  DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
+  DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
+
+  return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+/* Like copy_decl_to_var, but create a return slot object instead of a
+   pointer variable for return by invisible reference.  */
+
+static tree
+copy_result_decl_to_var (tree decl, copy_body_data *id)
+{
+  tree copy, type;
+
+  gcc_assert (TREE_CODE (decl) == PARM_DECL
+	      || TREE_CODE (decl) == RESULT_DECL);
+
+  type = TREE_TYPE (decl);
+  if (DECL_BY_REFERENCE (decl))
+    type = TREE_TYPE (type);
+
+  copy = build_decl (VAR_DECL, DECL_NAME (decl), type);
+  TREE_READONLY (copy) = TREE_READONLY (decl);
+  TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
+  if (!DECL_BY_REFERENCE (decl))
+    {
+      TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
+      DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
+      DECL_NO_TBAA_P (copy) = DECL_NO_TBAA_P (decl);
+    }
+
+  return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+tree
+copy_decl_no_change (tree decl, copy_body_data *id)
+{
+  tree copy;
+
+  copy = copy_node (decl);
+
+  /* The COPY is not abstract; it will be generated in DST_FN.  */
+  DECL_ABSTRACT (copy) = 0;
+  lang_hooks.dup_lang_specific_decl (copy);
+
+  /* TREE_ADDRESSABLE isn't used to indicate that a label's address has
+     been taken; it's for internal bookkeeping in expand_goto_internal.  */
+  if (TREE_CODE (copy) == LABEL_DECL)
+    {
+      TREE_ADDRESSABLE (copy) = 0;
+      LABEL_DECL_UID (copy) = -1;
+    }
+
+  return copy_decl_for_dup_finish (id, decl, copy);
+}
+
+static tree
+copy_decl_maybe_to_var (tree decl, copy_body_data *id)
+{
+  if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL)
+    return copy_decl_to_var (decl, id);
+  else
+    return copy_decl_no_change (decl, id);
+}
+
+/* Return a copy of the function's argument tree.  */
+static tree
+copy_arguments_for_versioning (tree orig_parm, copy_body_data * id,
+			       bitmap args_to_skip, tree *vars)
+{
+  tree arg, *parg;
+  tree new_parm = NULL;
+  int i = 0;
+
+  parg = &new_parm;
+
+  for (arg = orig_parm; arg; arg = TREE_CHAIN (arg), i++)
+    if (!args_to_skip || !bitmap_bit_p (args_to_skip, i))
+      {
+        tree new_tree = remap_decl (arg, id);
+        lang_hooks.dup_lang_specific_decl (new_tree);
+        *parg = new_tree;
+	parg = &TREE_CHAIN (new_tree);
+      }
+    else if (!pointer_map_contains (id->decl_map, arg))
+      {
+	/* Make an equivalent VAR_DECL.  If the argument was used
+	   as temporary variable later in function, the uses will be
+	   replaced by local variable.  */
+	tree var = copy_decl_to_var (arg, id);
+	get_var_ann (var);
+	add_referenced_var (var);
+	insert_decl_map (id, arg, var);
+        /* Declare this new variable.  */
+        TREE_CHAIN (var) = *vars;
+        *vars = var;
+      }
+  return new_parm;
+}
+
+/* Return a copy of the function's static chain.  */
+static tree
+copy_static_chain (tree static_chain, copy_body_data * id)
+{
+  tree *chain_copy, *pvar;
+
+  chain_copy = &static_chain;
+  for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar))
+    {
+      tree new_tree = remap_decl (*pvar, id);
+      lang_hooks.dup_lang_specific_decl (new_tree);
+      TREE_CHAIN (new_tree) = TREE_CHAIN (*pvar);
+      *pvar = new_tree;
+    }
+  return static_chain;
+}
+
+/* Return true if the function is allowed to be versioned.
+   This is a guard for the versioning functionality.  */
+bool
+tree_versionable_function_p (tree fndecl)
+{
+  if (fndecl == NULL_TREE)
+    return false;
+  /* ??? There are cases where a function is
+     uninlinable but can be versioned.  */
+  if (!tree_inlinable_function_p (fndecl))
+    return false;
+  
+  return true;
+}
+
+/* Create a copy of a function's tree.
+   OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
+   of the original function and the new copied function
+   respectively.  In case we want to replace a DECL 
+   tree with another tree while duplicating the function's 
+   body, TREE_MAP represents the mapping between these 
+   trees. If UPDATE_CLONES is set, the call_stmt fields
+   of edges of clones of the function will be updated.  */
+void
+tree_function_versioning (tree old_decl, tree new_decl, varray_type tree_map,
+			  bool update_clones, bitmap args_to_skip)
+{
+  struct cgraph_node *old_version_node;
+  struct cgraph_node *new_version_node;
+  copy_body_data id;
+  tree p;
+  unsigned i;
+  struct ipa_replace_map *replace_info;
+  basic_block old_entry_block;
+  VEC (gimple, heap) *init_stmts = VEC_alloc (gimple, heap, 10);
+
+  tree t_step;
+  tree old_current_function_decl = current_function_decl;
+  tree vars = NULL_TREE;
+
+  gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL
+	      && TREE_CODE (new_decl) == FUNCTION_DECL);
+  DECL_POSSIBLY_INLINED (old_decl) = 1;
+
+  old_version_node = cgraph_node (old_decl);
+  new_version_node = cgraph_node (new_decl);
+
+  /* Output the inlining info for this abstract function, since it has been
+     inlined.  If we don't do this now, we can lose the information about the
+     variables in the function when the blocks get blown away as soon as we
+     remove the cgraph node.  */
+  (*debug_hooks->outlining_inline_function) (old_decl);
+
+  DECL_ARTIFICIAL (new_decl) = 1;
+  DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl);
+
+  /* Prepare the data structures for the tree copy.  */
+  memset (&id, 0, sizeof (id));
+
+  /* Generate a new name for the new version. */
+  if (!update_clones)
+    {
+      DECL_NAME (new_decl) =  create_tmp_var_name (NULL);
+      SET_DECL_ASSEMBLER_NAME (new_decl, DECL_NAME (new_decl));
+      SET_DECL_RTL (new_decl, NULL_RTX);
+      id.statements_to_fold = pointer_set_create ();
+    }
+  
+  id.decl_map = pointer_map_create ();
+  id.src_fn = old_decl;
+  id.dst_fn = new_decl;
+  id.src_node = old_version_node;
+  id.dst_node = new_version_node;
+  id.src_cfun = DECL_STRUCT_FUNCTION (old_decl);
+  
+  id.copy_decl = copy_decl_no_change;
+  id.transform_call_graph_edges
+    = update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE;
+  id.transform_new_cfg = true;
+  id.transform_return_to_modify = false;
+  id.transform_lang_insert_block = NULL;
+
+  current_function_decl = new_decl;
+  old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION
+    (DECL_STRUCT_FUNCTION (old_decl));
+  initialize_cfun (new_decl, old_decl,
+		   old_entry_block->count,
+		   old_entry_block->frequency);
+  push_cfun (DECL_STRUCT_FUNCTION (new_decl));
+  
+  /* Copy the function's static chain.  */
+  p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;
+  if (p)
+    DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl =
+      copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl,
+			 &id);
+  
+  /* If there's a tree_map, prepare for substitution.  */
+  if (tree_map)
+    for (i = 0; i < VARRAY_ACTIVE_SIZE (tree_map); i++)
+      {
+	gimple init;
+	replace_info
+	  = (struct ipa_replace_map *) VARRAY_GENERIC_PTR (tree_map, i);
+	if (replace_info->replace_p)
+	  {
+	    tree op = replace_info->new_tree;
+
+	    STRIP_NOPS (op);
+
+	    if (TREE_CODE (op) == VIEW_CONVERT_EXPR)
+	      op = TREE_OPERAND (op, 0);
+	    
+	    if (TREE_CODE (op) == ADDR_EXPR)
+	      {
+		op = TREE_OPERAND (op, 0);
+		while (handled_component_p (op))
+		  op = TREE_OPERAND (op, 0);
+		if (TREE_CODE (op) == VAR_DECL)
+		  add_referenced_var (op);
+	      }
+	    gcc_assert (TREE_CODE (replace_info->old_tree) == PARM_DECL);
+	    init = setup_one_parameter (&id, replace_info->old_tree,
+	    			        replace_info->new_tree, id.src_fn,
+				        NULL,
+				        &vars);
+	    if (init)
+	      VEC_safe_push (gimple, heap, init_stmts, init);
+	  }
+      }
+  /* Copy the function's arguments.  */
+  if (DECL_ARGUMENTS (old_decl) != NULL_TREE)
+    DECL_ARGUMENTS (new_decl) =
+      copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id,
+      				     args_to_skip, &vars);
+  
+  DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id);
+  
+  /* Renumber the lexical scoping (non-code) blocks consecutively.  */
+  number_blocks (id.dst_fn);
+  
+  declare_inline_vars (DECL_INITIAL (new_decl), vars);
+  if (DECL_STRUCT_FUNCTION (old_decl)->local_decls != NULL_TREE)
+    /* Add local vars.  */
+    for (t_step = DECL_STRUCT_FUNCTION (old_decl)->local_decls;
+	 t_step; t_step = TREE_CHAIN (t_step))
+      {
+	tree var = TREE_VALUE (t_step);
+	if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
+	  cfun->local_decls = tree_cons (NULL_TREE, var, cfun->local_decls);
+	else if (!can_be_nonlocal (var, &id))
+	  cfun->local_decls =
+	    tree_cons (NULL_TREE, remap_decl (var, &id),
+		       cfun->local_decls);
+      }
+  
+  /* Copy the Function's body.  */
+  copy_body (&id, old_entry_block->count, old_entry_block->frequency, ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR);
+  
+  if (DECL_RESULT (old_decl) != NULL_TREE)
+    {
+      tree *res_decl = &DECL_RESULT (old_decl);
+      DECL_RESULT (new_decl) = remap_decl (*res_decl, &id);
+      lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl));
+    }
+  
+  /* Renumber the lexical scoping (non-code) blocks consecutively.  */
+  number_blocks (new_decl);
+
+  if (VEC_length (gimple, init_stmts))
+    {
+      basic_block bb = split_edge (single_succ_edge (ENTRY_BLOCK_PTR));
+      while (VEC_length (gimple, init_stmts))
+	insert_init_stmt (bb, VEC_pop (gimple, init_stmts));
+    }
+
+  /* Clean up.  */
+  pointer_map_destroy (id.decl_map);
+  if (!update_clones)
+    {
+      fold_marked_statements (0, id.statements_to_fold);
+      pointer_set_destroy (id.statements_to_fold);
+      fold_cond_expr_cond ();
+    }
+  if (gimple_in_ssa_p (cfun))
+    {
+      free_dominance_info (CDI_DOMINATORS);
+      free_dominance_info (CDI_POST_DOMINATORS);
+      if (!update_clones)
+        delete_unreachable_blocks ();
+      update_ssa (TODO_update_ssa);
+      if (!update_clones)
+	{
+	  fold_cond_expr_cond ();
+	  if (need_ssa_update_p ())
+	    update_ssa (TODO_update_ssa);
+	}
+    }
+  free_dominance_info (CDI_DOMINATORS);
+  free_dominance_info (CDI_POST_DOMINATORS);
+  VEC_free (gimple, heap, init_stmts);
+  pop_cfun ();
+  current_function_decl = old_current_function_decl;
+  gcc_assert (!current_function_decl
+	      || DECL_STRUCT_FUNCTION (current_function_decl) == cfun);
+  return;
+}
+
+/* Duplicate a type, fields and all.  */
+
+tree
+build_duplicate_type (tree type)
+{
+  struct copy_body_data id;
+
+  memset (&id, 0, sizeof (id));
+  id.src_fn = current_function_decl;
+  id.dst_fn = current_function_decl;
+  id.src_cfun = cfun;
+  id.decl_map = pointer_map_create ();
+  id.copy_decl = copy_decl_no_change;
+
+  type = remap_type_1 (type, &id);
+
+  pointer_map_destroy (id.decl_map);
+
+  TYPE_CANONICAL (type) = type;
+
+  return type;
+}
+
+/* Return whether it is safe to inline a function because it used different
+   target specific options or different optimization options.  */
+bool
+tree_can_inline_p (tree caller, tree callee)
+{
+#if 0
+  /* This causes a regression in SPEC in that it prevents a cold function from
+     inlining a hot function.  Perhaps this should only apply to functions
+     that the user declares hot/cold/optimize explicitly.  */
+
+  /* Don't inline a function with a higher optimization level than the
+     caller, or with different space constraints (hot/cold functions).  */
+  tree caller_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (caller);
+  tree callee_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (callee);
+
+  if (caller_tree != callee_tree)
+    {
+      struct cl_optimization *caller_opt
+	= TREE_OPTIMIZATION ((caller_tree)
+			     ? caller_tree
+			     : optimization_default_node);
+
+      struct cl_optimization *callee_opt
+	= TREE_OPTIMIZATION ((callee_tree)
+			     ? callee_tree
+			     : optimization_default_node);
+
+      if ((caller_opt->optimize > callee_opt->optimize)
+	  || (caller_opt->optimize_size != callee_opt->optimize_size))
+	return false;
+    }
+#endif
+
+  /* Allow the backend to decide if inlining is ok.  */
+  return targetm.target_option.can_inline_p (caller, callee);
+}