diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineMulDivRem.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineMulDivRem.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp index 2494078..87d5621 100644 --- a/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp +++ b/lib/Transforms/InstCombine/InstCombineMulDivRem.cpp @@ -1027,6 +1027,12 @@ Instruction *InstCombiner::visitURem(BinaryOperator &I) { if (Instruction *common = commonIRemTransforms(I)) return common; + // (zext A) urem (zext B) --> zext (A urem B) + if (ZExtInst *ZOp0 = dyn_cast<ZExtInst>(Op0)) + if (Value *ZOp1 = dyn_castZExtVal(Op1, ZOp0->getSrcTy())) + return new ZExtInst(Builder->CreateURem(ZOp0->getOperand(0), ZOp1), + I.getType()); + // X urem Y -> X and Y-1, where Y is a power of 2, if (isKnownToBeAPowerOfTwo(Op1, /*OrZero*/true)) { Constant *N1 = Constant::getAllOnesValue(I.getType()); @@ -1034,12 +1040,6 @@ Instruction *InstCombiner::visitURem(BinaryOperator &I) { return BinaryOperator::CreateAnd(Op0, Add); } - // (zext A) urem (zext B) --> zext (A urem B) - if (ZExtInst *ZOp0 = dyn_cast<ZExtInst>(Op0)) - if (Value *ZOp1 = dyn_castZExtVal(Op1, ZOp0->getSrcTy())) - return new ZExtInst(Builder->CreateURem(ZOp0->getOperand(0), ZOp1), - I.getType()); - return 0; } |