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Fix CodeExtractor/2004-03-17-UpdatePHIsOutsideRegion.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12489 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-03-18 05:38:31 +00:00
parent fa3e86f93d
commit d07f899691
1 changed files with 13 additions and 0 deletions
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13
lib/Transforms/Utils/CodeExtractor.cpp
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@ -371,6 +371,19 @@ Function *CodeExtractor::ExtractCodeRegion(const std::vector<BasicBlock*> &code)
if (!BlocksToExtract.count(PN->getIncomingBlock(i)))
PN->setIncomingBlock(i, newFuncRoot);
// Look at all successors of the codeReplacer block. If any of these blocks
// had PHI nodes in them, we need to update the "from" block to be the code
// replacer, not the original block in the extracted region.
std::vector<BasicBlock*> Succs(succ_begin(codeReplacer),
succ_end(codeReplacer));
for (unsigned i = 0, e = Succs.size(); i != e; ++i)
for (BasicBlock::iterator I = Succs[i]->begin();
PHINode *PN = dyn_cast<PHINode>(I); ++I)
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
if (BlocksToExtract.count(PN->getIncomingBlock(i)))
PN->setIncomingBlock(i, codeReplacer);
DEBUG(if (verifyFunction(*newFunction)) abort());
return newFunction;
}