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Fix InstCombine/2007-01-18-VectorInfLoop.ll, a case where instcombine
infinitely loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33343 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -3062,10 +3062,16 @@ Instruction *InstCombiner::visitAnd(BinaryOperator &I) {
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// See if we can simplify any instructions used by the instruction whose sole
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// purpose is to compute bits we don't care about.
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uint64_t KnownZero, KnownOne;
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if (!isa<PackedType>(I.getType()) &&
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SimplifyDemandedBits(&I, I.getType()->getIntegerTypeMask(),
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KnownZero, KnownOne))
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if (!isa<PackedType>(I.getType())) {
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if (SimplifyDemandedBits(&I, I.getType()->getIntegerTypeMask(),
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KnownZero, KnownOne))
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return &I;
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} else {
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if (ConstantPacked *CP = dyn_cast<ConstantPacked>(Op1)) {
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if (CP->isAllOnesValue())
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return ReplaceInstUsesWith(I, I.getOperand(0));
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}
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}
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if (ConstantInt *AndRHS = dyn_cast<ConstantInt>(Op1)) {
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uint64_t AndRHSMask = AndRHS->getZExtValue();
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