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[regallocfast] Make sure the MachineRegisterInfo is aware of clobbers from a

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register masks.  This is an obvious and necessary fix for a soon to be committed
patch.  No test case possible at this time.  Reviewed by Jakob.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167498 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier
2012-11-06 22:52:42 +00:00
parent a6fb97a49a
commit 7979b24e5c
1 changed files with 5 additions and 0 deletions
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5
lib/CodeGen/RegAllocFast.cpp
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@ -956,6 +956,11 @@ void RAFast::AllocateBasicBlock() {
bool hasPhysDefs = false;
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI->getOperand(i);
// Make sure MRI knows about registers clobbered by regmasks.
if (MO.isRegMask()) {
MRI->addPhysRegsUsedFromRegMask(MO.getRegMask());
continue;
}
if (!MO.isReg()) continue;
unsigned Reg = MO.getReg();
if (!Reg) continue;