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1 /* Definitions for describing one tree-ssa optimization pass.
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2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
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3 Free Software Foundation, Inc.
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4 Contributed by Richard Henderson <rth@redhat.com>
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22
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23 #ifndef GCC_TREE_PASS_H
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24 #define GCC_TREE_PASS_H 1
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25
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26 /* In tree-dump.c */
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27
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28 /* Different tree dump places. When you add new tree dump places,
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29 extend the DUMP_FILES array in tree-dump.c. */
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30 enum tree_dump_index
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31 {
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32 TDI_none, /* No dump */
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33 TDI_cgraph, /* dump function call graph. */
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34 TDI_tu, /* dump the whole translation unit. */
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35 TDI_class, /* dump class hierarchy. */
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36 TDI_original, /* dump each function before optimizing it */
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37 TDI_generic, /* dump each function after genericizing it */
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38 TDI_nested, /* dump each function after unnesting it */
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39 TDI_vcg, /* create a VCG graph file for each
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40 function's flowgraph. */
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41 TDI_tree_all, /* enable all the GENERIC/GIMPLE dumps. */
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42 TDI_rtl_all, /* enable all the RTL dumps. */
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43 TDI_ipa_all, /* enable all the IPA dumps. */
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44
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45 TDI_end
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46 };
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47
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48 /* Bit masks to control dumping. Not all values are applicable to
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49 all dumps. Add new ones at the end. When you define new
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50 values, extend the DUMP_OPTIONS array in tree-dump.c */
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51 #define TDF_ADDRESS (1 << 0) /* dump node addresses */
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52 #define TDF_SLIM (1 << 1) /* don't go wild following links */
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53 #define TDF_RAW (1 << 2) /* don't unparse the function */
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54 #define TDF_DETAILS (1 << 3) /* show more detailed info about
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55 each pass */
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56 #define TDF_STATS (1 << 4) /* dump various statistics about
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57 each pass */
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58 #define TDF_BLOCKS (1 << 5) /* display basic block boundaries */
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59 #define TDF_VOPS (1 << 6) /* display virtual operands */
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60 #define TDF_LINENO (1 << 7) /* display statement line numbers */
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61 #define TDF_UID (1 << 8) /* display decl UIDs */
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62
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63 #define TDF_TREE (1 << 9) /* is a tree dump */
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64 #define TDF_RTL (1 << 10) /* is a RTL dump */
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65 #define TDF_IPA (1 << 11) /* is an IPA dump */
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66 #define TDF_STMTADDR (1 << 12) /* Address of stmt. */
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67
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68 #define TDF_GRAPH (1 << 13) /* a graph dump is being emitted */
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69 #define TDF_MEMSYMS (1 << 14) /* display memory symbols in expr.
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70 Implies TDF_VOPS. */
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71
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72 #define TDF_DIAGNOSTIC (1 << 15) /* A dump to be put in a diagnostic
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73 message. */
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74 #define TDF_VERBOSE (1 << 16) /* A dump that uses the full tree
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75 dumper to print stmts. */
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76 #define TDF_RHS_ONLY (1 << 17) /* a flag to only print the RHS of
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77 a gimple stmt. */
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78
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79 extern char *get_dump_file_name (enum tree_dump_index);
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80 extern int dump_enabled_p (enum tree_dump_index);
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81 extern int dump_initialized_p (enum tree_dump_index);
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82 extern FILE *dump_begin (enum tree_dump_index, int *);
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83 extern void dump_end (enum tree_dump_index, FILE *);
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84 extern void dump_node (const_tree, int, FILE *);
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85 extern int dump_switch_p (const char *);
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86 extern const char *dump_flag_name (enum tree_dump_index);
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87
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88 /* Global variables used to communicate with passes. */
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89 extern FILE *dump_file;
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90 extern int dump_flags;
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91 extern const char *dump_file_name;
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92
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93 /* Return the dump_file_info for the given phase. */
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94 extern struct dump_file_info *get_dump_file_info (enum tree_dump_index);
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95
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96 /* Describe one pass; this is the common part shared across different pass
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97 types. */
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98 struct opt_pass
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99 {
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100 /* Optimization pass type. */
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101 enum opt_pass_type {
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102 GIMPLE_PASS,
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103 RTL_PASS,
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104 SIMPLE_IPA_PASS,
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105 IPA_PASS
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106 } type;
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107 /* Terse name of the pass used as a fragment of the dump file
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108 name. If the name starts with a star, no dump happens. */
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109 const char *name;
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110
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111 /* If non-null, this pass and all sub-passes are executed only if
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112 the function returns true. */
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113 bool (*gate) (void);
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114
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115 /* This is the code to run. If null, then there should be sub-passes
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116 otherwise this pass does nothing. The return value contains
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117 TODOs to execute in addition to those in TODO_flags_finish. */
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118 unsigned int (*execute) (void);
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119
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120 /* A list of sub-passes to run, dependent on gate predicate. */
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121 struct opt_pass *sub;
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122
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123 /* Next in the list of passes to run, independent of gate predicate. */
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124 struct opt_pass *next;
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125
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126 /* Static pass number, used as a fragment of the dump file name. */
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127 int static_pass_number;
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128
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129 /* The timevar id associated with this pass. */
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130 /* ??? Ideally would be dynamically assigned. */
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131 unsigned int tv_id;
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132
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133 /* Sets of properties input and output from this pass. */
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134 unsigned int properties_required;
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135 unsigned int properties_provided;
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136 unsigned int properties_destroyed;
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137
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138 /* Flags indicating common sets things to do before and after. */
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139 unsigned int todo_flags_start;
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140 unsigned int todo_flags_finish;
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141 };
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142
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143 /* Description of GIMPLE pass. */
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144 struct gimple_opt_pass
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145 {
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146 struct opt_pass pass;
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147 };
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148
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149 /* Description of RTL pass. */
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150 struct rtl_opt_pass
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151 {
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152 struct opt_pass pass;
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153 };
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154
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155 struct varpool_node;
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156 struct cgraph_node;
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157
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158 /* Description of IPA pass with generate summary, write, execute, read and
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159 transform stages. */
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160 struct ipa_opt_pass
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161 {
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162 struct opt_pass pass;
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163
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164 /* IPA passes can analyze function body and variable initializers
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165 using this hook and produce summary. */
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166 void (*generate_summary) (void);
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167
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168 /* This hook is used to serialize IPA summaries on disk. */
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169 void (*write_summary) (void);
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170
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171 /* For most ipa passes, the information can only be deserialized in
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172 one chunk. However, function bodies are read function at a time
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173 as needed so both calls are necessary. */
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174 void (*read_summary) (void);
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175 void (*function_read_summary) (struct cgraph_node *);
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176
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177 /* Results of interprocedural propagation of an IPA pass is applied to
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178 function body via this hook. */
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179 unsigned int function_transform_todo_flags_start;
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180 unsigned int (*function_transform) (struct cgraph_node *);
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181 void (*variable_transform) (struct varpool_node *);
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182 };
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183
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184 /* Description of simple IPA pass. Simple IPA passes have just one execute
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185 hook. */
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186 struct simple_ipa_opt_pass
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187 {
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188 struct opt_pass pass;
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189 };
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190
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191 /* Define a tree dump switch. */
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192 struct dump_file_info
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193 {
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194 const char *suffix; /* suffix to give output file. */
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195 const char *swtch; /* command line switch */
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196 const char *glob; /* command line glob */
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197 int flags; /* user flags */
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198 int state; /* state of play */
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199 int num; /* dump file number */
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200 };
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201
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202 /* Pass properties. */
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203 #define PROP_gimple_any (1 << 0) /* entire gimple grammar */
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204 #define PROP_gimple_lcf (1 << 1) /* lowered control flow */
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205 #define PROP_gimple_leh (1 << 2) /* lowered eh */
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206 #define PROP_cfg (1 << 3)
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207 #define PROP_referenced_vars (1 << 4)
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208 #define PROP_ssa (1 << 5)
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209 #define PROP_no_crit_edges (1 << 6)
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210 #define PROP_rtl (1 << 7)
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211 #define PROP_alias (1 << 8)
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212 #define PROP_gimple_lomp (1 << 9) /* lowered OpenMP directives */
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213
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214 #define PROP_trees \
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215 (PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_gimple_lomp)
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216
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217 /* To-do flags. */
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218 #define TODO_dump_func (1 << 0)
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219 #define TODO_ggc_collect (1 << 1)
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220 #define TODO_verify_ssa (1 << 2)
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221 #define TODO_verify_flow (1 << 3)
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222 #define TODO_verify_stmts (1 << 4)
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223 #define TODO_cleanup_cfg (1 << 5)
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224 #define TODO_verify_loops (1 << 6)
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225 #define TODO_dump_cgraph (1 << 7)
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226 #define TODO_remove_functions (1 << 8)
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227 #define TODO_rebuild_frequencies (1 << 9)
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228 #define TODO_verify_rtl_sharing (1 << 10)
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229
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230 /* To-do flags for calls to update_ssa. */
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231
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232 /* Update the SSA form inserting PHI nodes for newly exposed symbols
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233 and virtual names marked for updating. When updating real names,
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234 only insert PHI nodes for a real name O_j in blocks reached by all
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235 the new and old definitions for O_j. If the iterated dominance
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236 frontier for O_j is not pruned, we may end up inserting PHI nodes
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237 in blocks that have one or more edges with no incoming definition
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238 for O_j. This would lead to uninitialized warnings for O_j's
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239 symbol. */
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240 #define TODO_update_ssa (1 << 11)
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241
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242 /* Update the SSA form without inserting any new PHI nodes at all.
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243 This is used by passes that have either inserted all the PHI nodes
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244 themselves or passes that need only to patch use-def and def-def
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245 chains for virtuals (e.g., DCE). */
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246 #define TODO_update_ssa_no_phi (1 << 12)
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247
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248 /* Insert PHI nodes everywhere they are needed. No pruning of the
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249 IDF is done. This is used by passes that need the PHI nodes for
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250 O_j even if it means that some arguments will come from the default
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251 definition of O_j's symbol (e.g., pass_linear_transform).
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252
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253 WARNING: If you need to use this flag, chances are that your pass
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254 may be doing something wrong. Inserting PHI nodes for an old name
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255 where not all edges carry a new replacement may lead to silent
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256 codegen errors or spurious uninitialized warnings. */
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257 #define TODO_update_ssa_full_phi (1 << 13)
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258
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259 /* Passes that update the SSA form on their own may want to delegate
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260 the updating of virtual names to the generic updater. Since FUD
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261 chains are easier to maintain, this simplifies the work they need
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262 to do. NOTE: If this flag is used, any OLD->NEW mappings for real
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263 names are explicitly destroyed and only the symbols marked for
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264 renaming are processed. */
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265 #define TODO_update_ssa_only_virtuals (1 << 14)
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266
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267 /* Some passes leave unused local variables that can be removed from
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268 cfun->local_decls. This reduces the size of dump files
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269 and the memory footprint for VAR_DECLs. */
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270 #define TODO_remove_unused_locals (1 << 15)
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271
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272 /* Internally used for the first in a sequence of passes. It is set
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273 for the passes that are handed to register_dump_files. */
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274 #define TODO_set_props (1 << 16)
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275
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276 /* Call df_finish at the end of the pass. This is done after all of
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277 the dumpers have been allowed to run so that they have access to
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278 the instance before it is destroyed. */
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279 #define TODO_df_finish (1 << 17)
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280
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281 /* Call df_verify at the end of the pass if checking is enabled. */
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282 #define TODO_df_verify (1 << 18)
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283
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284 /* Internally used for the first instance of a pass. */
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285 #define TODO_mark_first_instance (1 << 19)
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286
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287 /* Rebuild aliasing info. */
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288 #define TODO_rebuild_alias (1 << 20)
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289
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290 #define TODO_update_ssa_any \
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291 (TODO_update_ssa \
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292 | TODO_update_ssa_no_phi \
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293 | TODO_update_ssa_full_phi \
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294 | TODO_update_ssa_only_virtuals)
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295
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296 #define TODO_verify_all \
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297 (TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts)
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298
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299 extern void tree_lowering_passes (tree decl);
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300
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301 extern struct gimple_opt_pass pass_mudflap_1;
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302 extern struct gimple_opt_pass pass_mudflap_2;
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303 extern struct gimple_opt_pass pass_remove_useless_stmts;
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304 extern struct gimple_opt_pass pass_lower_cf;
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305 extern struct gimple_opt_pass pass_refactor_eh;
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306 extern struct gimple_opt_pass pass_lower_eh;
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307 extern struct gimple_opt_pass pass_build_cfg;
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308 extern struct gimple_opt_pass pass_tree_profile;
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309 extern struct gimple_opt_pass pass_early_tree_profile;
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310 extern struct gimple_opt_pass pass_cleanup_cfg;
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311 extern struct gimple_opt_pass pass_referenced_vars;
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312 extern struct gimple_opt_pass pass_sra;
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313 extern struct gimple_opt_pass pass_sra_early;
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314 extern struct gimple_opt_pass pass_tail_recursion;
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315 extern struct gimple_opt_pass pass_tail_calls;
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316 extern struct gimple_opt_pass pass_tree_loop;
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317 extern struct gimple_opt_pass pass_tree_loop_init;
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318 extern struct gimple_opt_pass pass_lim;
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319 extern struct gimple_opt_pass pass_tree_unswitch;
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320 extern struct gimple_opt_pass pass_predcom;
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321 extern struct gimple_opt_pass pass_iv_canon;
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322 extern struct gimple_opt_pass pass_scev_cprop;
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323 extern struct gimple_opt_pass pass_empty_loop;
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324 extern struct gimple_opt_pass pass_record_bounds;
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325 extern struct gimple_opt_pass pass_graphite_transforms;
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326 extern struct gimple_opt_pass pass_if_conversion;
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327 extern struct gimple_opt_pass pass_loop_distribution;
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328 extern struct gimple_opt_pass pass_vectorize;
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329 extern struct gimple_opt_pass pass_complete_unroll;
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330 extern struct gimple_opt_pass pass_complete_unrolli;
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331 extern struct gimple_opt_pass pass_parallelize_loops;
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332 extern struct gimple_opt_pass pass_loop_prefetch;
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333 extern struct gimple_opt_pass pass_iv_optimize;
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334 extern struct gimple_opt_pass pass_tree_loop_done;
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335 extern struct gimple_opt_pass pass_ch;
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336 extern struct gimple_opt_pass pass_ccp;
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337 extern struct gimple_opt_pass pass_phi_only_cprop;
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338 extern struct gimple_opt_pass pass_build_ssa;
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339 extern struct gimple_opt_pass pass_del_ssa;
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340 extern struct gimple_opt_pass pass_build_alias;
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341 extern struct gimple_opt_pass pass_dominator;
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342 extern struct gimple_opt_pass pass_dce;
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343 extern struct gimple_opt_pass pass_dce_loop;
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344 extern struct gimple_opt_pass pass_cd_dce;
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345 extern struct gimple_opt_pass pass_call_cdce;
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346 extern struct gimple_opt_pass pass_merge_phi;
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347 extern struct gimple_opt_pass pass_split_crit_edges;
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348 extern struct gimple_opt_pass pass_pre;
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349 extern struct gimple_opt_pass pass_profile;
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350 extern struct gimple_opt_pass pass_strip_predict_hints;
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351 extern struct gimple_opt_pass pass_lower_complex_O0;
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352 extern struct gimple_opt_pass pass_lower_complex;
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353 extern struct gimple_opt_pass pass_lower_vector;
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354 extern struct gimple_opt_pass pass_lower_vector_ssa;
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355 extern struct gimple_opt_pass pass_lower_omp;
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356 extern struct gimple_opt_pass pass_expand_omp;
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357 extern struct gimple_opt_pass pass_expand_omp_ssa;
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358 extern struct gimple_opt_pass pass_object_sizes;
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359 extern struct gimple_opt_pass pass_fold_builtins;
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360 extern struct gimple_opt_pass pass_stdarg;
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361 extern struct gimple_opt_pass pass_early_warn_uninitialized;
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362 extern struct gimple_opt_pass pass_late_warn_uninitialized;
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363 extern struct gimple_opt_pass pass_cse_reciprocals;
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364 extern struct gimple_opt_pass pass_cse_sincos;
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365 extern struct gimple_opt_pass pass_convert_to_rsqrt;
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366 extern struct gimple_opt_pass pass_warn_function_return;
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367 extern struct gimple_opt_pass pass_warn_function_noreturn;
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368 extern struct gimple_opt_pass pass_cselim;
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369 extern struct gimple_opt_pass pass_phiopt;
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370 extern struct gimple_opt_pass pass_forwprop;
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371 extern struct gimple_opt_pass pass_phiprop;
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372 extern struct gimple_opt_pass pass_tree_ifcombine;
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373 extern struct gimple_opt_pass pass_dse;
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374 extern struct gimple_opt_pass pass_simple_dse;
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375 extern struct gimple_opt_pass pass_nrv;
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376 extern struct gimple_opt_pass pass_mark_used_blocks;
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377 extern struct gimple_opt_pass pass_rename_ssa_copies;
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378 extern struct gimple_opt_pass pass_rest_of_compilation;
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379 extern struct gimple_opt_pass pass_sink_code;
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380 extern struct gimple_opt_pass pass_fre;
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381 extern struct gimple_opt_pass pass_linear_transform;
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382 extern struct gimple_opt_pass pass_check_data_deps;
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383 extern struct gimple_opt_pass pass_copy_prop;
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384 extern struct gimple_opt_pass pass_vrp;
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385 extern struct gimple_opt_pass pass_uncprop;
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386 extern struct gimple_opt_pass pass_return_slot;
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387 extern struct gimple_opt_pass pass_reassoc;
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388 extern struct gimple_opt_pass pass_rebuild_cgraph_edges;
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389 extern struct gimple_opt_pass pass_build_cgraph_edges;
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390 extern struct gimple_opt_pass pass_reset_cc_flags;
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391
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392 /* IPA Passes */
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393 extern struct ipa_opt_pass pass_ipa_inline;
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394 extern struct ipa_opt_pass pass_ipa_cp;
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395 extern struct ipa_opt_pass pass_ipa_reference;
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396 extern struct ipa_opt_pass pass_ipa_pure_const;
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397
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398 extern struct simple_ipa_opt_pass pass_ipa_matrix_reorg;
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399 extern struct simple_ipa_opt_pass pass_ipa_early_inline;
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400 extern struct simple_ipa_opt_pass pass_ipa_type_escape;
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401 extern struct simple_ipa_opt_pass pass_ipa_pta;
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402 extern struct simple_ipa_opt_pass pass_ipa_struct_reorg;
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403 extern struct simple_ipa_opt_pass pass_early_local_passes;
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404 extern struct simple_ipa_opt_pass pass_ipa_increase_alignment;
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405 extern struct simple_ipa_opt_pass pass_ipa_function_and_variable_visibility;
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406
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407 extern struct gimple_opt_pass pass_all_optimizations;
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408 extern struct gimple_opt_pass pass_cleanup_cfg_post_optimizing;
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409 extern struct gimple_opt_pass pass_free_cfg_annotations;
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410 extern struct gimple_opt_pass pass_free_datastructures;
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411 extern struct gimple_opt_pass pass_init_datastructures;
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412 extern struct gimple_opt_pass pass_fixup_cfg;
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413
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414 extern struct rtl_opt_pass pass_expand;
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415 extern struct rtl_opt_pass pass_init_function;
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416 extern struct rtl_opt_pass pass_jump;
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417 extern struct rtl_opt_pass pass_rtl_eh;
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418 extern struct rtl_opt_pass pass_initial_value_sets;
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419 extern struct rtl_opt_pass pass_unshare_all_rtl;
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420 extern struct rtl_opt_pass pass_instantiate_virtual_regs;
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421 extern struct rtl_opt_pass pass_rtl_fwprop;
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422 extern struct rtl_opt_pass pass_rtl_fwprop_addr;
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423 extern struct rtl_opt_pass pass_jump2;
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424 extern struct rtl_opt_pass pass_lower_subreg;
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425 extern struct rtl_opt_pass pass_cse;
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426 extern struct rtl_opt_pass pass_fast_rtl_dce;
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427 extern struct rtl_opt_pass pass_ud_rtl_dce;
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428 extern struct rtl_opt_pass pass_rtl_dce;
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429 extern struct rtl_opt_pass pass_rtl_dse1;
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430 extern struct rtl_opt_pass pass_rtl_dse2;
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431 extern struct rtl_opt_pass pass_rtl_dse3;
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432 extern struct rtl_opt_pass pass_gcse;
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433 extern struct rtl_opt_pass pass_jump_bypass;
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434 extern struct rtl_opt_pass pass_profiling;
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435 extern struct rtl_opt_pass pass_rtl_ifcvt;
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436 extern struct gimple_opt_pass pass_tracer;
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437
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438 extern struct rtl_opt_pass pass_into_cfg_layout_mode;
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439 extern struct rtl_opt_pass pass_outof_cfg_layout_mode;
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440
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441 extern struct rtl_opt_pass pass_loop2;
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442 extern struct rtl_opt_pass pass_rtl_loop_init;
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443 extern struct rtl_opt_pass pass_rtl_move_loop_invariants;
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444 extern struct rtl_opt_pass pass_rtl_unswitch;
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445 extern struct rtl_opt_pass pass_rtl_unroll_and_peel_loops;
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446 extern struct rtl_opt_pass pass_rtl_doloop;
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447 extern struct rtl_opt_pass pass_rtl_loop_done;
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448
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449 extern struct rtl_opt_pass pass_web;
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450 extern struct rtl_opt_pass pass_cse2;
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451 extern struct rtl_opt_pass pass_df_initialize_opt;
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452 extern struct rtl_opt_pass pass_df_initialize_no_opt;
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453 extern struct rtl_opt_pass pass_reginfo_init;
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454 extern struct rtl_opt_pass pass_subregs_of_mode_init;
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455 extern struct rtl_opt_pass pass_subregs_of_mode_finish;
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456 extern struct rtl_opt_pass pass_inc_dec;
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457 extern struct rtl_opt_pass pass_stack_ptr_mod;
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458 extern struct rtl_opt_pass pass_initialize_regs;
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459 extern struct rtl_opt_pass pass_combine;
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460 extern struct rtl_opt_pass pass_if_after_combine;
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461 extern struct rtl_opt_pass pass_partition_blocks;
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462 extern struct rtl_opt_pass pass_match_asm_constraints;
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463 extern struct rtl_opt_pass pass_regmove;
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464 extern struct rtl_opt_pass pass_split_all_insns;
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465 extern struct rtl_opt_pass pass_fast_rtl_byte_dce;
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466 extern struct rtl_opt_pass pass_lower_subreg2;
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467 extern struct rtl_opt_pass pass_mode_switching;
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468 extern struct rtl_opt_pass pass_see;
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469 extern struct rtl_opt_pass pass_sms;
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470 extern struct rtl_opt_pass pass_sched;
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471 extern struct rtl_opt_pass pass_ira;
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472 extern struct rtl_opt_pass pass_postreload;
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473 extern struct rtl_opt_pass pass_clean_state;
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474 extern struct rtl_opt_pass pass_branch_prob;
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475 extern struct rtl_opt_pass pass_value_profile_transformations;
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476 extern struct rtl_opt_pass pass_postreload_cse;
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477 extern struct rtl_opt_pass pass_gcse2;
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478 extern struct rtl_opt_pass pass_split_after_reload;
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479 extern struct rtl_opt_pass pass_branch_target_load_optimize1;
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480 extern struct rtl_opt_pass pass_thread_prologue_and_epilogue;
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481 extern struct rtl_opt_pass pass_stack_adjustments;
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482 extern struct rtl_opt_pass pass_peephole2;
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483 extern struct rtl_opt_pass pass_if_after_reload;
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484 extern struct rtl_opt_pass pass_regrename;
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485 extern struct rtl_opt_pass pass_cprop_hardreg;
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486 extern struct rtl_opt_pass pass_reorder_blocks;
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487 extern struct rtl_opt_pass pass_branch_target_load_optimize2;
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488 extern struct rtl_opt_pass pass_leaf_regs;
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489 extern struct rtl_opt_pass pass_split_before_sched2;
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490 extern struct rtl_opt_pass pass_sched2;
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491 extern struct rtl_opt_pass pass_stack_regs;
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492 extern struct rtl_opt_pass pass_stack_regs_run;
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493 extern struct rtl_opt_pass pass_df_finish;
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494 extern struct rtl_opt_pass pass_compute_alignments;
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495 extern struct rtl_opt_pass pass_duplicate_computed_gotos;
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496 extern struct rtl_opt_pass pass_variable_tracking;
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497 extern struct rtl_opt_pass pass_free_cfg;
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498 extern struct rtl_opt_pass pass_machine_reorg;
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499 extern struct rtl_opt_pass pass_cleanup_barriers;
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500 extern struct rtl_opt_pass pass_delay_slots;
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501 extern struct rtl_opt_pass pass_split_for_shorten_branches;
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502 extern struct rtl_opt_pass pass_split_before_regstack;
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503 extern struct rtl_opt_pass pass_convert_to_eh_region_ranges;
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504 extern struct rtl_opt_pass pass_shorten_branches;
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505 extern struct rtl_opt_pass pass_set_nothrow_function_flags;
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506 extern struct rtl_opt_pass pass_final;
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507 extern struct rtl_opt_pass pass_rtl_seqabstr;
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508 extern struct gimple_opt_pass pass_release_ssa_names;
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509 extern struct gimple_opt_pass pass_early_inline;
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510 extern struct gimple_opt_pass pass_inline_parameters;
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511 extern struct gimple_opt_pass pass_all_early_optimizations;
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512 extern struct gimple_opt_pass pass_update_address_taken;
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513 extern struct gimple_opt_pass pass_convert_switch;
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514
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515 /* The root of the compilation pass tree, once constructed. */
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516 extern struct opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
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517
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518 /* Current optimization pass. */
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519 extern struct opt_pass *current_pass;
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520
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521 extern struct opt_pass * get_pass_for_id (int);
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522 extern void execute_pass_list (struct opt_pass *);
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523 extern void execute_ipa_pass_list (struct opt_pass *);
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524 extern void print_current_pass (FILE *);
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525 extern void debug_pass (void);
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526
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527 /* Set to true if the pass is called the first time during compilation of the
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528 current function. Note that using this information in the optimization
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529 passes is considered not to be clean, and it should be avoided if possible.
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530 This flag is currently used to prevent loops from being peeled repeatedly
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531 in jump threading; it will be removed once we preserve loop structures
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532 throughout the compilation -- we will be able to mark the affected loops
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533 directly in jump threading, and avoid peeling them next time. */
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534 extern bool first_pass_instance;
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535
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536 #endif /* GCC_TREE_PASS_H */
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