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Modified VNInfo. The "copy" member is now a union which holds the copy for a register interval, or the defining register for a stack interval. Access is via getCopy/setCopy and getReg/setReg.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78620 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Lang Hames
2009-08-10 23:43:28 +00:00
parent 00edf39b34
commit 52c1afcaea
7 changed files with 67 additions and 46 deletions
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20
lib/CodeGen/LiveIntervalAnalysis.cpp
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@@ -740,14 +740,14 @@ void LiveIntervals::handleVirtualRegisterDef(MachineBasicBlock *mbb,
// The new value number (#1) is defined by the instruction we claimed
// defined value #0.
VNInfo *ValNo = interval.getNextValue(OldValNo->def, OldValNo->copy,
VNInfo *ValNo = interval.getNextValue(OldValNo->def, OldValNo->getCopy(),
false, // update at *
VNInfoAllocator);
ValNo->setFlags(OldValNo->getFlags()); // * <- updating here
// Value#0 is now defined by the 2-addr instruction.
OldValNo->def = RedefIndex;
OldValNo->copy = 0;
OldValNo->setCopy(0);
if (MO.isEarlyClobber())
OldValNo->setHasRedefByEC(true);
@@ -1129,21 +1129,21 @@ LiveInterval* LiveIntervals::dupInterval(LiveInterval *li) {
/// getVNInfoSourceReg - Helper function that parses the specified VNInfo
/// copy field and returns the source register that defines it.
unsigned LiveIntervals::getVNInfoSourceReg(const VNInfo *VNI) const {
if (!VNI->copy)
if (!VNI->getCopy())
return 0;
if (VNI->copy->getOpcode() == TargetInstrInfo::EXTRACT_SUBREG) {
if (VNI->getCopy()->getOpcode() == TargetInstrInfo::EXTRACT_SUBREG) {
// If it's extracting out of a physical register, return the sub-register.
unsigned Reg = VNI->copy->getOperand(1).getReg();
unsigned Reg = VNI->getCopy()->getOperand(1).getReg();
if (TargetRegisterInfo::isPhysicalRegister(Reg))
Reg = tri_->getSubReg(Reg, VNI->copy->getOperand(2).getImm());
Reg = tri_->getSubReg(Reg, VNI->getCopy()->getOperand(2).getImm());
return Reg;
} else if (VNI->copy->getOpcode() == TargetInstrInfo::INSERT_SUBREG ||
VNI->copy->getOpcode() == TargetInstrInfo::SUBREG_TO_REG)
return VNI->copy->getOperand(2).getReg();
} else if (VNI->getCopy()->getOpcode() == TargetInstrInfo::INSERT_SUBREG ||
VNI->getCopy()->getOpcode() == TargetInstrInfo::SUBREG_TO_REG)
return VNI->getCopy()->getOperand(2).getReg();
unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
if (tii_->isMoveInstr(*VNI->copy, SrcReg, DstReg, SrcSubReg, DstSubReg))
if (tii_->isMoveInstr(*VNI->getCopy(), SrcReg, DstReg, SrcSubReg, DstSubReg))
return SrcReg;
llvm_unreachable("Unrecognized copy instruction!");
return 0;