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Remove check which is duplicated in
InstCombiner::visitSelectInstWithICmp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75409 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -9474,26 +9474,6 @@ Instruction *InstCombiner::visitSelectInst(SelectInst &SI) {
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}
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if (ICmpInst *IC = dyn_cast<ICmpInst>(SI.getCondition())) {
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// (x <s 0) ? -1 : 0 -> ashr x, 31
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if (TrueValC->isAllOnesValue() && FalseValC->isZero())
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if (ConstantInt *CmpCst = dyn_cast<ConstantInt>(IC->getOperand(1))) {
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if (IC->getPredicate() == ICmpInst::ICMP_SLT && CmpCst->isZero()) {
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// The comparison constant and the result are not neccessarily the
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// same width. Make an all-ones value by inserting a AShr.
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Value *X = IC->getOperand(0);
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uint32_t Bits = X->getType()->getScalarSizeInBits();
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Constant *ShAmt = Context->getConstantInt(X->getType(), Bits-1);
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Instruction *SRA = BinaryOperator::Create(Instruction::AShr, X,
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ShAmt, "ones");
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InsertNewInstBefore(SRA, SI);
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// Then cast to the appropriate width.
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return CastInst::CreateIntegerCast(SRA, SI.getType(), true);
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}
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}
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// If one of the constants is zero (we know they can't both be) and we
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// have an icmp instruction with zero, and we have an 'and' with the
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// non-constant value, eliminate this whole mess. This corresponds to
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