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- Update the virtual reg to machine instruction map when hoisting.

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- Fix subtle bug when creating initially creating this map.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44873 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2007-12-11 19:17:04 +00:00
parent 650b0527a4
commit 28bd5f0e47
1 changed files with 12 additions and 2 deletions
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14
lib/CodeGen/MachineLICM.cpp
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@ -215,7 +215,7 @@ void MachineLICM::MapVirtualRegisterDefs(const MachineFunction &MF) {
const MachineInstr &MI = *II;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI.getOperand(0);
const MachineOperand &MO = MI.getOperand(i);
if (MO.isRegister() && MO.isDef() &&
MRegisterInfo::isVirtualRegister(MO.getReg()))
@ -317,7 +317,17 @@ void MachineLICM::Hoist(MachineInstr &MI) {
"The predecessor doesn't feed directly into the loop header!");
// Now move the instructions to the predecessor.
MoveInstToEndOfBlock(MBB, MI.clone());
MachineInstr *NewMI = MI.clone();
MoveInstToEndOfBlock(MBB, NewMI);
// Update VRegDefs.
for (unsigned i = 0, e = NewMI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = NewMI->getOperand(i);
if (MO.isRegister() && MO.isDef() &&
MRegisterInfo::isVirtualRegister(MO.getReg()))
VRegDefs[MO.getReg()] = NewMI;
}
// Hoisting was successful! Remove bothersome instruction now.
MI.getParent()->remove(&MI);