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changeset 112:4b203247047d

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ignore TailCall failure in SelectionDAGBuilder (not Unreachable instruction)
author MitsukiMiyagi
date Mon, 07 Mar 2016 22:07:35 +0900
parents 3e4d254d74d9
children b8d969d74b93
files lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
diffstat 1 files changed, 7 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp	Tue Feb 02 19:38:53 2016 +0900
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp	Mon Mar 07 22:07:35 2016 +0900
@@ -5410,8 +5410,14 @@
 
   // Check if target-independent constraints permit a tail call here.
   // Target-dependent constraints are checked within TLI->LowerCallTo.
-  if (isTailCall && !isInTailCallPosition(CS, DAG.getTarget()))
+  if (isTailCall && !isInTailCallPosition(CS, DAG.getTarget())) {
+#ifndef noCbC
+    errs() << CS.getCaller()->getName() + " : Tail call elimination was failed on goto ";
+    errs() << "warning: not unreachable instruction in a tail call.\n ";
+#else
     isTailCall = false;
+#endif
+  }
 
   TargetLowering::CallLoweringInfo CLI(DAG);
   CLI.setDebugLoc(getCurSDLoc()).setChain(getRoot())