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getOperandConstraint returns -1 if the operand does have the specific constraint. This bug was causing excessive spills. 

llvm-svn: 32295
This commit is contained in:
Evan Cheng 2006-12-07 00:46:04 +00:00
parent 9a86d6c10b
commit 7074cbd449
1 changed files with 1 additions and 1 deletions
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2
llvm/lib/CodeGen/VirtRegMap.cpp
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@ -97,7 +97,7 @@ void VirtRegMap::virtFolded(unsigned VirtReg, MachineInstr *OldMI,
}
ModRef MRInfo;
if (TII.getOperandConstraint(OldMI->getOpcode(), OpNo, TOI::TIED_TO)) {
if (TII.getOperandConstraint(OldMI->getOpcode(), OpNo, TOI::TIED_TO) != -1) {
// Folded a two-address operand.
MRInfo = isModRef;
} else if (OldMI->getOperand(OpNo).isDef()) {