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author | Dan Gohman <gohman@apple.com> | 2009-10-09 00:41:22 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-10-09 00:41:22 +0000 |
commit | 4db3581a288dcd7e56f0a1ecdc2316cd85e183c7 (patch) | |
tree | ea86beb54cb6e7a467e41faecfcaabd1710070ce /lib/Analysis/ScalarEvolution.cpp | |
parent | e91b9a3b59688023e20cee8441179300b87c844e (diff) | |
download | llvm-4db3581a288dcd7e56f0a1ecdc2316cd85e183c7.tar.gz llvm-4db3581a288dcd7e56f0a1ecdc2316cd85e183c7.tar.bz2 llvm-4db3581a288dcd7e56f0a1ecdc2316cd85e183c7.tar.xz |
Preserve HasNSW and HasNUW when constructing SCEVs for Add and Mul
instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83606 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
-rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 9300de1168..bdf31f9a70 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -2951,12 +2951,20 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) { Operator *U = cast<Operator>(V); switch (Opcode) { - case Instruction::Add: + case Instruction::Add: { + AddOperator *A = cast<AddOperator>(U); return getAddExpr(getSCEV(U->getOperand(0)), - getSCEV(U->getOperand(1))); - case Instruction::Mul: + getSCEV(U->getOperand(1)), + A->hasNoUnsignedWrap(), + A->hasNoSignedWrap()); + } + case Instruction::Mul: { + MulOperator *M = cast<MulOperator>(U); return getMulExpr(getSCEV(U->getOperand(0)), - getSCEV(U->getOperand(1))); + getSCEV(U->getOperand(1)), + M->hasNoUnsignedWrap(), + M->hasNoSignedWrap()); + } case Instruction::UDiv: return getUDivExpr(getSCEV(U->getOperand(0)), getSCEV(U->getOperand(1))); |