[llvm-commits] [llvm] r113848 - /llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp

[Gabor Greif]

Author: ggreif
Date: Tue Sep 14 15:46:08 2010
New Revision: 113848

URL: http://llvm.org/viewvc/llvm-project?rev=113848&view=rev
Log:
must not peephole away side effects

Modified:
    llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp

Modified: llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp?rev=113848&r1=113847&r2=113848&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp (original)
+++ llvm/trunk/lib/CodeGen/PeepholeOptimizer.cpp Tue Sep 14 15:46:08 2010
@@ -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