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Additional check for regno==0

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83103 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2009-09-29 20:11:10 +00:00
parent 1d957e4d0d
commit a9a9c95f67
1 changed files with 1 additions and 1 deletions
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2
lib/CodeGen/RegisterScavenging.cpp
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@@ -280,7 +280,7 @@ unsigned RegScavenger::scavengeRegister(const TargetRegisterClass *RC,
// Exclude all the registers being used by the instruction.
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) {
MachineOperand &MO = I->getOperand(i);
if (MO.isReg() && !TRI->isVirtualRegister(MO.getReg()))
if (MO.isReg() && MO.getReg() != 0 && !TRI->isVirtualRegister(MO.getReg()))
Candidates.reset(MO.getReg());
}