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Take another stab at getting isLiveIn() and isLiveOut() right.

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llvm-svn: 43869
This commit is contained in:
Owen Anderson 2007-11-08 01:32:45 +00:00
parent 1e15f3cd4f
commit b735086b08
1 changed files with 11 additions and 8 deletions
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15
lib/CodeGen/StrongPHIElimination.cpp
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@ -225,9 +225,8 @@ bool isLiveIn(LiveVariables::VarInfo& V, MachineBasicBlock* MBB) {
if (V.AliveBlocks.test(MBB->getNumber()))
return true;
for (std::vector<MachineInstr*>::iterator I = V.Kills.begin(),
E = V.Kills.end(); I != E; ++I)
if ((*I)->getParent() == MBB)
if (V.DefInst->getParent() != MBB &&
V.UsedBlocks.test(MBB->getNumber()))
return true;
return false;
@ -236,11 +235,15 @@ bool isLiveIn(LiveVariables::VarInfo& V, MachineBasicBlock* MBB) {
/// isLiveOut - help method that determines, from a VarInfo, if a register is
/// live out of a block.
bool isLiveOut(LiveVariables::VarInfo& V, MachineBasicBlock* MBB) {
if (V.AliveBlocks.test(MBB->getNumber()))
return true;
if (MBB == V.DefInst->getParent() ||
V.UsedBlocks.test(MBB->getNumber())) {
for (std::vector<MachineInstr*>::iterator I = V.Kills.begin(),
E = V.Kills.end(); I != E; ++I)
if ((*I)->getParent() == MBB)
return false;
if (V.DefInst->getParent() == MBB)
return true;
}
return false;
}