diff options
Diffstat (limited to 'lib/CodeGen/PeepholeOptimizer.cpp')
| -rw-r--r-- | lib/CodeGen/PeepholeOptimizer.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/PeepholeOptimizer.cpp b/lib/CodeGen/PeepholeOptimizer.cpp index ea14d276d5..17cee46ca1 100644 --- a/lib/CodeGen/PeepholeOptimizer.cpp +++ b/lib/CodeGen/PeepholeOptimizer.cpp @@ -272,7 +272,8 @@ bool PeepholeOptimizer::runOnMachineFunction(MachineFunction &MF) { MII = I->begin(), ME = I->end(); MII != ME; ) { MachineInstr *MI = &*MII; - if (MI->getDesc().isCompare()) { + if (MI->getDesc().isCompare() && + !MI->getDesc().hasUnmodeledSideEffects()) { ++MII; // The iterator may become invalid if the compare is deleted. Changed |= OptimizeCmpInstr(MI, MBB); } else { |