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A few more comments.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45069 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-12-16 04:07:23 +00:00
parent cdd0417ba3
commit 965b467767
1 changed files with 6 additions and 1 deletions
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7
lib/CodeGen/StrongPHIElimination.cpp
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@ -311,6 +311,10 @@ void StrongPHIElimination::processBlock(MachineBasicBlock* MBB) {
}
}
/// processPHIUnion - Take a set of candidate registers to be coallesced when
/// decomposing the PHI instruction. Use the DominanceForest to remove the ones
/// that are known to interfere, and flag others that need to be checked for
/// local interferences.
void StrongPHIElimination::processPHIUnion(MachineInstr* Inst,
std::set<unsigned>& PHIUnion,
std::vector<StrongPHIElimination::DomForestNode*>& DF,
@ -322,6 +326,7 @@ void StrongPHIElimination::processPHIUnion(MachineInstr* Inst,
LiveVariables& LV = getAnalysis<LiveVariables>();
unsigned DestReg = Inst->getOperand(0).getReg();
// DF walk on the DomForest
while (!worklist.empty()) {
DomForestNode* DFNode = worklist.back();
@ -350,7 +355,7 @@ void StrongPHIElimination::processPHIUnion(MachineInstr* Inst,
// Add (p, c) to possible local interferences
locals.push_back(std::make_pair(DFNode->getReg(), child->getReg()));
}
if (!visited.count(child)) {
worklist.push_back(child);
inserted = true;