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Fix some simple bugs. StrongPHIElimination now does not crash on 164.gzip.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45773 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -178,7 +178,6 @@ public:
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else if (preorder[ABlock] > preorder[BBlock])
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return false;
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assert(0 && "Error sorting by dominance!");
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return false;
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}
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};
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@ -208,8 +207,9 @@ StrongPHIElimination::computeDomForest(std::set<unsigned>& regs) {
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for (std::vector<unsigned>::iterator I = worklist.begin(), E = worklist.end();
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I != E; ++I) {
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unsigned pre = preorder[LV.getVarInfo(*I).DefInst->getParent()];
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MachineBasicBlock* parentBlock =
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LV.getVarInfo(CurrentParent->getReg()).DefInst->getParent();
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MachineBasicBlock* parentBlock = CurrentParent->getReg() ?
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LV.getVarInfo(CurrentParent->getReg()).DefInst->getParent() :
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0;
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while (pre > maxpreorder[parentBlock]) {
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stack.pop_back();
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