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Revert this use of NSW; this one isn't actually safe. NSW addition

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is not reassociative.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91667 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-12-18 03:57:04 +00:00
parent ad12b2698b
commit 3a5d409f3c
1 changed files with 2 additions and 4 deletions
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6
lib/Analysis/ScalarEvolution.cpp
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@ -1457,12 +1457,10 @@ const SCEV *ScalarEvolution::getAddExpr(SmallVectorImpl<const SCEV *> &Ops,
LIOps.push_back(AddRec->getStart()); LIOps.push_back(AddRec->getStart());
SmallVector<const SCEV *, 4> AddRecOps(AddRec->op_begin(), SmallVector<const SCEV *, 4> AddRecOps(AddRec->op_begin(),
AddRec->op_end()); AddRec->op_end());
AddRecOps[0] = getAddExpr(LIOps); AddRecOps[0] = getAddExpr(LIOps);
const SCEV *NewRec = getAddRecExpr(AddRecOps, AddRec->getLoop(), const SCEV *NewRec = getAddRecExpr(AddRecOps, AddRec->getLoop());
AddRec->hasNoUnsignedWrap() && HasNUW,
AddRec->hasNoSignedWrap() && HasNSW);
// If all of the other operands were loop invariant, we are done. // If all of the other operands were loop invariant, we are done.
if (Ops.size() == 1) return NewRec; if (Ops.size() == 1) return NewRec;