diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineSelect.cpp')
-rw-r--r-- | lib/Transforms/InstCombine/InstCombineSelect.cpp | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineSelect.cpp b/lib/Transforms/InstCombine/InstCombineSelect.cpp index c85d74a..c44fe9d 100644 --- a/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -699,31 +699,6 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) { SI.setOperand(2, TrueVal); return &SI; } - - // select (or (A == 0) (B == 0)) T, F--> select (and (A != 0) (B != 0)) F, T - // Note: This is a canonicalization rather than an optimization, and is used - // to expose opportunities to other instcombine transforms. - Instruction* CondInst = dyn_cast<Instruction>(CondVal); - if (CondInst && CondInst->getOpcode() == Instruction::Or) { - ICmpInst *LHSCmp = dyn_cast<ICmpInst>(CondInst->getOperand(0)); - ICmpInst *RHSCmp = dyn_cast<ICmpInst>(CondInst->getOperand(1)); - if (LHSCmp && LHSCmp->getPredicate() == ICmpInst::ICMP_EQ && - RHSCmp && RHSCmp->getPredicate() == ICmpInst::ICMP_EQ) { - ConstantInt* C1 = dyn_cast<ConstantInt>(LHSCmp->getOperand(1)); - ConstantInt* C2 = dyn_cast<ConstantInt>(RHSCmp->getOperand(1)); - if (C1 && C1->isZero() && C2 && C2->isZero()) { - LHSCmp->setPredicate(ICmpInst::ICMP_NE); - RHSCmp->setPredicate(ICmpInst::ICMP_NE); - Value *And = - InsertNewInstBefore(BinaryOperator::CreateAnd(LHSCmp, RHSCmp, - "and."+CondVal->getName()), SI); - SI.setOperand(0, And); - SI.setOperand(1, FalseVal); - SI.setOperand(2, TrueVal); - return &SI; - } - } - } return 0; } |