6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-04-11 16:37:42 +00:00
Code Issues Projects Releases Wiki Activity

Ugh. Copy coalescer does not update register numbers.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35600 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-04-02 18:49:18 +00:00
parent ff6ad39bfb
commit bcfd4665b5
2 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/llvm/CodeGen/LiveIntervalAnalysis.h
View File

@ -267,6 +267,10 @@ namespace llvm {
MachineInstr *lastRegisterUse(unsigned Reg, unsigned Start, unsigned End,
MachineOperand *&MOU);
/// findDefOperand - Returns the MachineOperand that is a def of the specific
/// register. It returns NULL if the def is not found.
MachineOperand *findDefOperand(MachineInstr *MI, unsigned Reg);
/// unsetRegisterKill - Unset IsKill property of all uses of the specific
/// register of the specific instruction.
void unsetRegisterKill(MachineInstr *MI, unsigned Reg);

17
lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -945,7 +945,7 @@ bool LiveIntervals::JoinCopy(MachineInstr *CopyMI,
} else {
MachineInstr *SrcMI = getInstructionFromIndex(SrcStart);
if (SrcMI) {
MachineOperand *mops = SrcMI->findRegisterDefOperand(SrcReg);
MachineOperand *mops = findDefOperand(SrcMI, repSrcReg);
if (mops)
// A dead def should have a single cycle interval.
++RemoveStart;
@ -1022,7 +1022,7 @@ TryJoin:
} else {
MachineInstr *SrcMI = getInstructionFromIndex(SrcStart);
if (SrcMI) {
MachineOperand *mops = SrcMI->findRegisterDefOperand(SrcReg);
MachineOperand *mops = findDefOperand(SrcMI, repSrcReg);
if (mops)
mops->setIsDead();
}
@ -1617,6 +1617,19 @@ LiveIntervals::lastRegisterUse(unsigned Reg, unsigned Start, unsigned End,
return NULL;
}
/// findDefOperand - Returns the MachineOperand that is a def of the specific
/// register. It returns NULL if the def is not found.
MachineOperand *LiveIntervals::findDefOperand(MachineInstr *MI, unsigned Reg) {
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI->getOperand(i);
if (MO.isReg() && MO.isDef() &&
mri_->regsOverlap(rep(MO.getReg()), Reg))
return &MO;
}
return NULL;
}
/// unsetRegisterKill - Unset IsKill property of all uses of specific register
/// of the specific instruction.
void LiveIntervals::unsetRegisterKill(MachineInstr *MI, unsigned Reg) {