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Don't back past debug info intrinsics; SCEVExpander's strategy

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for ignoring debug info intrinsics everywhere else is to advance
past them, and it needs to be consistent.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99332 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-03-23 21:53:22 +00:00
parent a495c7232d
commit e059ee832c
1 changed files with 1 additions and 12 deletions
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13
lib/Analysis/ScalarEvolutionExpander.cpp
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@@ -1268,19 +1268,8 @@ Value *SCEVExpander::expand(const SCEV *S) {
L = L->getParentLoop()) L = L->getParentLoop())
if (S->isLoopInvariant(L)) { if (S->isLoopInvariant(L)) {
if (!L) break; if (!L) break;
if (BasicBlock *Preheader = L->getLoopPreheader()) { if (BasicBlock *Preheader = L->getLoopPreheader())
InsertPt = Preheader->getTerminator(); InsertPt = Preheader->getTerminator();
BasicBlock::iterator IP = InsertPt;
// Back past any debug info instructions. Sometimes we inserted
// something earlier before debug info but after any real instructions.
// This should behave the same as if debug info was not present.
while (IP != Preheader->begin()) {
--IP;
if (!isa<DbgInfoIntrinsic>(IP))
break;
InsertPt = IP;
}
}
} else { } else {
// If the SCEV is computable at this level, insert it into the header // 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 // after the PHIs (and after any other instructions that we've inserted