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Notify LiveRangeEdit of new virtual registers.

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Add a delegate class to MachineRegisterInfo with a single virtual
function, MRI_NoteNewVirtualRegister(). Update LiveRangeEdit to inherit
from this delegate class and override the definition of the callback
with an implementation that tracks the newly created virtual registers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188435 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mark Lacey
2013-08-14 23:50:09 +00:00
parent 1feb5854ae
commit 03fe68e0a9
4 changed files with 50 additions and 5 deletions
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13
lib/CodeGen/LiveRangeEdit.cpp
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@ -33,11 +33,9 @@ void LiveRangeEdit::Delegate::anchor() { }
LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg) {
unsigned VReg = MRI.createVirtualRegister(MRI.getRegClass(OldReg));
if (VRM) {
VRM->grow();
VRM->setIsSplitFromReg(VReg, VRM->getOriginal(OldReg));
}
LiveInterval &LI = LIS.getOrCreateInterval(VReg);
NewRegs.push_back(VReg);
return LI;
}
@ -387,6 +385,17 @@ void LiveRangeEdit::eliminateDeadDefs(SmallVectorImpl<MachineInstr*> &Dead,
}
}
// Keep track of new virtual registers created via
// MachineRegisterInfo::createVirtualRegister.
void
LiveRangeEdit::MRI_NoteNewVirtualRegister(unsigned VReg)
{
if (VRM)
VRM->grow();
NewRegs.push_back(VReg);
}
void
LiveRangeEdit::calculateRegClassAndHint(MachineFunction &MF,
const MachineLoopInfo &Loops,