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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46217 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2008-01-21 22:01:01 +00:00
parent 03531a4816
commit 3b489522df
1 changed files with 6 additions and 1 deletions
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7
lib/CodeGen/StrongPHIElimination.cpp
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@ -550,7 +550,9 @@ void StrongPHIElimination::processPHIUnion(MachineInstr* Inst,
for (DomForestNode::iterator CI = DFNode->begin(), CE = DFNode->end(); for (DomForestNode::iterator CI = DFNode->begin(), CE = DFNode->end();
CI != CE; ++CI) { CI != CE; ++CI) {
DomForestNode* child = *CI; DomForestNode* child = *CI;
// If the current node is live-out of the defining block of one of its
// children, insert a copy for it
if (isLiveOut(DFNode->getReg(), if (isLiveOut(DFNode->getReg(),
MRI.getVRegDef(child->getReg())->getParent(), MRI, LV)) { MRI.getVRegDef(child->getReg())->getParent(), MRI, LV)) {
// Insert copies for parent // Insert copies for parent
@ -565,6 +567,9 @@ void StrongPHIElimination::processPHIUnion(MachineInstr* Inst,
PHIUnion.erase(SrcReg); PHIUnion.erase(SrcReg);
} }
} }
// If a node is live-in to the defining block of one of its children, but
// not live-out, then we need to scan that block for local interferences.
} else if (isLiveIn(DFNode->getReg(), } else if (isLiveIn(DFNode->getReg(),
MRI.getVRegDef(child->getReg())->getParent(), MRI.getVRegDef(child->getReg())->getParent(),
MRI, LV) || MRI, LV) ||