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Fix bug: test/Regression/Other/2002-02-24-InlineBrokePHINodes.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1798 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-02-25 00:35:07 +00:00
parent 664c953b39
commit e8e320d2fa
1 changed files with 20 additions and 0 deletions
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20
lib/VMCore/BasicBlock.cpp
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@ -155,5 +155,25 @@ BasicBlock *BasicBlock::splitBasicBlock(iterator I) {
// Add a branch instruction to the newly formed basic block.
InstList.push_back(new BranchInst(New));
// Now we must loop through all of the successors of the New block (which
// _were_ the successors of the 'this' block), and update any PHI nodes in
// successors. If there were PHI nodes in the successors, then they need to
// know that incoming branches will be from New, not from Old.
//
for (BasicBlock::succ_iterator I = succ_begin(New), E = succ_end(New);
I != E; ++I) {
// Loop over any phi nodes in the basic block, updating the BB field of
// incoming values...
BasicBlock *Successor = *I;
for (BasicBlock::iterator II = Successor->begin();
PHINode *PN = dyn_cast<PHINode>(*II); ++II) {
int IDX = PN->getBasicBlockIndex(this);
while (IDX != -1) {
PN->setIncomingBlock((unsigned)IDX, New);
IDX = PN->getBasicBlockIndex(this);
}
}
}
return New;
}