it is ok to dce stacksave.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25295 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp
index 8f0f7e86cd8490b79d59c2f09bcb6fc6651722fd..4e3b3e972e215627278d5fd657162ee5f0d291db 100644 (file)
--- a/lib/Transforms/Utils/Local.cpp
+++ b/lib/Transforms/Utils/Local.cpp
@@ -296,6 +296,7 @@ bool llvm::isInstructionTriviallyDead(Instruction *I) {
       default: break;
       case Intrinsic::returnaddress:
       case Intrinsic::frameaddress:
+      case Intrinsic::stacksave:
       case Intrinsic::isunordered:
       case Intrinsic::ctpop:
       case Intrinsic::ctlz: