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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43869 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-11-08 01:32:45 +00:00
parent 401f78f8a9
commit 14b3fb7805
1 changed files with 11 additions and 8 deletions
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19
lib/CodeGen/StrongPHIElimination.cpp
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@ -225,10 +225,9 @@ 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)
return true;
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 (V.DefInst->getParent() == MBB)
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;
return true;
}
return false;
}