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Avoid adding duplicate function live-in's.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104560 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2010-05-24 21:33:37 +00:00
parent e350690e3b
commit 3946043a80
3 changed files with 21 additions and 2 deletions
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9
lib/CodeGen/MachineRegisterInfo.cpp
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@ -165,6 +165,15 @@ unsigned MachineRegisterInfo::getLiveInPhysReg(unsigned VReg) const {
return 0;
}
/// getLiveInVirtReg - If PReg is a live-in physical register, return the
/// corresponding live-in physical register.
unsigned MachineRegisterInfo::getLiveInVirtReg(unsigned PReg) const {
for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I)
if (I->first == PReg)
return I->second;
return 0;
}
static cl::opt<bool>
SchedLiveInCopies("schedule-livein-copies", cl::Hidden,
cl::desc("Schedule copies of livein registers"),