commit f08b36d386c7fbeb4fa71dc07fd0be6de85efd44
author Gabor Greif <ggreif@gmail.com> Tue Sep 14 20:46:08 2010 +0000
committer Gabor Greif <ggreif@gmail.com> Tue Sep 14 20:46:08 2010 +0000
tree 9aa53d38b0b724c8efd8de3ef55b1f25fe2cf29a
parent cf98cbaef1556a27bd2668c260791c5ee0282d71

must not peephole away side effects

llvm-svn: 113848

llvm/lib/CodeGen/PeepholeOptimizer.cpp

diff --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
index 15ede91..28a4a9e 100644
--- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp
+++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp
@@ -269,7 +269,8 @@
            MII = I->begin(), MIE = I->end(); MII != MIE; ) {
       MachineInstr *MI = &*MII;
 
-      if (MI->getDesc().isCompare()) {
+      if (MI->getDesc().isCompare() &&
+          !MI->getDesc().hasUnmodeledSideEffects()) {
         if (OptimizeCmpInstr(MI, MBB, MII))
           Changed = true;
         else