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After PostRA scheduling, don't set kill flags on undef operands.

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This should fix the ATOM buildbot failing on break-avx-dep.ll.

llvm-svn: 192824
This commit is contained in:
Andrew Trick 2013-10-16 18:30:23 +00:00
parent f1aa4d7d7f
commit 9e09b2e6f2
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/PostRASchedulerList.cpp
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@ -515,11 +515,11 @@ void SchedulePostRATDList::FixupKills(MachineBasicBlock *MBB) {
// Examine all used registers and set/clear kill flag. When a
// register is used multiple times we only set the kill flag on
// the first use.
// the first use. Don't set kill flags on undef operands.
killedRegs.reset();
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI->getOperand(i);
if (!MO.isReg() || !MO.isUse()) continue;
if (!MO.isReg() || !MO.isUse() || MO.isUndef()) continue;
unsigned Reg = MO.getReg();
if ((Reg == 0) || MRI.isReserved(Reg)) continue;