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Fix a serious brain-o. Obviously no-one reviewed my patch :(
This fixes PR2359 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51536 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -5571,7 +5571,8 @@ Instruction *InstCombiner::FoldFCmp_IntToFP_Cst(FCmpInst &I,
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SMax.convertFromAPInt(APInt::getSignedMaxValue(IntWidth), true,
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APFloat::rmNearestTiesToEven);
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if (SMax.compare(RHS) == APFloat::cmpLessThan) { // smax < 13123.0
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if (ICmpInst::ICMP_NE || ICmpInst::ICMP_SLT || Pred == ICmpInst::ICMP_SLE)
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if (Pred == ICmpInst::ICMP_NE || Pred == ICmpInst::ICMP_SLT ||
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Pred == ICmpInst::ICMP_SLE)
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return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty, 1));
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return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty, 0));
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}
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@ -5581,7 +5582,8 @@ Instruction *InstCombiner::FoldFCmp_IntToFP_Cst(FCmpInst &I,
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SMin.convertFromAPInt(APInt::getSignedMinValue(IntWidth), true,
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APFloat::rmNearestTiesToEven);
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if (SMin.compare(RHS) == APFloat::cmpGreaterThan) { // smin > 12312.0
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if (ICmpInst::ICMP_NE || ICmpInst::ICMP_SGT || Pred == ICmpInst::ICMP_SGE)
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if (Pred == ICmpInst::ICMP_NE || Pred == ICmpInst::ICMP_SGT ||
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Pred == ICmpInst::ICMP_SGE)
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return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty, 1));
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return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty, 0));
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}
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11
test/Transforms/InstCombine/2008-05-23-CompareFold.ll
Normal file
11
test/Transforms/InstCombine/2008-05-23-CompareFold.ll
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@ -0,0 +1,11 @@
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret i1 false}
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; PR2359
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define i1 @f(i8* %x) {
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entry:
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%tmp462 = load i8* %x, align 1 ; <i8> [#uses=1]
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%tmp462463 = sitofp i8 %tmp462 to float ; <float> [#uses=1]
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%tmp464 = fcmp ugt float %tmp462463, 0x47EFFFFFE0000000 ; <i1>
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ret i1 %tmp464
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}
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