diff options
| author | Evan Cheng <evan.cheng@apple.com> | 2006-12-08 08:02:34 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2006-12-08 08:02:34 +0000 |
| commit | 5c2a46052b3fa69dbdae483870ebe1b9e50386b5 (patch) | |
| tree | ce7fd5eb9aa019cbc8b85db3369efdb42aeb9eb1 /lib/CodeGen/VirtRegMap.cpp | |
| parent | 7814ad0bf38047628eb3165e1b73e44da7e8b825 (diff) | |
Proper fix for PR1037: to determine is a VR is a modref, check 1) whether it is
tied to another oeprand, 2) whether is is being tied to by another operand. So
the destination operand of a two-address MI can be correctly identified.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32354 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index 8184075113..83543dc29d 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -97,7 +97,9 @@ void VirtRegMap::virtFolded(unsigned VirtReg, MachineInstr *OldMI, } ModRef MRInfo; - if (TII.getOperandConstraint(OldMI->getOpcode(), OpNo, TOI::TIED_TO)) { + const TargetInstrDescriptor *TID = OldMI->getInstrDescriptor(); + if (TID->getOperandConstraint(OpNo, TOI::TIED_TO) != -1 || + TII.findTiedToSrcOperand(TID, OpNo) != -1) { // Folded a two-address operand. MRInfo = isModRef; } else if (OldMI->getOperand(OpNo).isDef()) { @@ -849,7 +851,7 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) { // If this def is part of a two-address operand, make sure to execute // the store from the correct physical register. unsigned PhysReg; - int TiedOp = TII->findTiedToSrcOperand(MI.getOpcode(), i); + int TiedOp = TII->findTiedToSrcOperand(MI.getInstrDescriptor(), i); if (TiedOp != -1) PhysReg = MI.getOperand(TiedOp).getReg(); else { |