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Fix PR3486. Fix a bug in code that manually patch physical register live interval after its sub-register is coalesced with a virtual register.

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llvm-svn: 64082
This commit is contained in:
Evan Cheng
2009-02-08 11:04:35 +00:00
parent 95ea38fa1a
commit b3783639cb
4 changed files with 60 additions and 16 deletions
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11
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
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@@ -824,11 +824,18 @@ bool LiveIntervals::findReachableMBBs(unsigned Start, unsigned End,
}
LiveInterval* LiveIntervals::createInterval(unsigned reg) {
float Weight = TargetRegisterInfo::isPhysicalRegister(reg) ?
HUGE_VALF : 0.0F;
float Weight = TargetRegisterInfo::isPhysicalRegister(reg) ? HUGE_VALF : 0.0F;
return new LiveInterval(reg, Weight);
}
/// dupInterval - Duplicate a live interval. The caller is responsible for
/// managing the allocated memory.
LiveInterval* LiveIntervals::dupInterval(LiveInterval *li) {
LiveInterval *NewLI = createInterval(li->reg);
NewLI->Copy(*li, getVNInfoAllocator());
return NewLI;
}
/// 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 {