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Non-affine post-inc SCEV expansions have more code which must be

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emitted after the increment. Make sure the insert position
reflects this. This fixes PR6453.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97537 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-03-02 01:59:21 +00:00
parent 46ada19645
commit 069d6f3396
3 changed files with 51 additions and 3 deletions
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2
lib/Analysis/ScalarEvolutionExpander.cpp
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@@ -1087,7 +1087,7 @@ Value *SCEVExpander::expand(const SCEV *S) {
// If the SCEV is computable at this level, insert it into the header
// after the PHIs (and after any other instructions that we've inserted
// there) so that it is guaranteed to dominate any user inside the loop.
if (L && S->hasComputableLoopEvolution(L))
if (L && S->hasComputableLoopEvolution(L) && L != PostIncLoop)
InsertPt = L->getHeader()->getFirstNonPHI();
while (isInsertedInstruction(InsertPt))
InsertPt = llvm::next(BasicBlock::iterator(InsertPt));