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Fix reference to iterator invalidated by an erase operation. Uncovered 

by _GLIBCXX_DEBUG.

llvm-svn: 37796
This commit is contained in:
David Greene 2007-06-29 02:53:16 +00:00
parent 9468bfd932
commit 1e2a12019f
1 changed files with 4 additions and 3 deletions
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7
llvm/lib/Transforms/Utils/LoopSimplify.cpp
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@ -564,11 +564,12 @@ Loop *LoopSimplify::SeparateNestedLoop(Loop *L) {
// Scan all of the loop children of L, moving them to OuterLoop if they are
// not part of the inner loop.
for (Loop::iterator I = L->begin(); I != L->end(); )
if (BlocksInL.count((*I)->getHeader()))
const std::vector<Loop*> &SubLoops = L->getSubLoops();
for (size_t I = 0; I != SubLoops.size(); )
if (BlocksInL.count(SubLoops[I]->getHeader()))
++I; // Loop remains in L
else
NewOuter->addChildLoop(L->removeChildLoop(I));
NewOuter->addChildLoop(L->removeChildLoop(SubLoops.begin() + I));
// Now that we know which blocks are in L and which need to be moved to
// OuterLoop, move any blocks that need it.