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If addrecexpr has nuw flag, the value should never be less than its start value and start value does not required to be SCEVConstant. Reviewed By: nikic, sanjoy Differential Revision: https://reviews.llvm.org/D71690
122 lines
4.0 KiB
LLVM
122 lines
4.0 KiB
LLVM
; RUN: opt < %s -S -analyze -scalar-evolution | FileCheck %s
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; copied from flags-from-poison.ll
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; CHECK-LABEL: @test-add-nuw
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; CHECK: --> {(1 + %offset)<nuw>,+,1}<nuw><%loop> U: [1,0) S: [1,0)
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define void @test-add-nuw(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nuw i32 %i, 1
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%index32 = add nuw i32 %nexti, %offset
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK-LABEL: @test-addrec-nuw
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; CHECK: --> {(1 + (10 smax %offset))<nuw>,+,1}<nuw><%loop> U: [11,0) S: [11,0)
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define void @test-addrec-nuw(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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%cmp = icmp sgt i32 %offset, 10
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%min.10 = select i1 %cmp, i32 %offset, i32 10
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nuw i32 %i, 1
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%index32 = add nuw i32 %nexti, %min.10
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK-LABEL: @test-addrec-nsw-start-neg-strip-neg
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; CHECK: --> {(-1 + (-10 smin %offset))<nsw>,+,-1}<nsw><%loop> U: [-2147483648,-10) S: [-2147483648,-10)
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define void @test-addrec-nsw-start-neg-strip-neg(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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%cmp = icmp slt i32 %offset, -10
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%max = select i1 %cmp, i32 %offset, i32 -10
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nsw i32 %i, -1
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%index32 = add nsw i32 %nexti, %max
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK-LABEL: @test-addrec-nsw-start-pos-strip-neg
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; CHECK: --> {(-1 + (10 smin %offset))<nsw>,+,-1}<nsw><%loop> U: [-2147483648,10) S: [-2147483648,10)
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define void @test-addrec-nsw-start-pos-strip-neg(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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%cmp = icmp slt i32 %offset, 10
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%max = select i1 %cmp, i32 %offset, i32 10
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nsw i32 %i, -1
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%index32 = add nsw i32 %nexti, %max
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK-LABEL: @test-addrec-nsw-start-pos-strip-pos
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; CHECK: --> {(1 + (10 smax %offset))<nuw><nsw>,+,1}<nuw><nsw><%loop> U: [11,-2147483648) S: [11,-2147483648)
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define void @test-addrec-nsw-start-pos-strip-pos(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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%cmp = icmp sgt i32 %offset, 10
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%min = select i1 %cmp, i32 %offset, i32 10
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nsw i32 %i, 1
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%index32 = add nsw i32 %nexti, %min
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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; CHECK-LABEL: @test-addrec-nsw-start-neg-strip-pos
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; CHECK: --> {(1 + (-10 smax %offset))<nsw>,+,1}<nsw><%loop> U: [-9,-2147483648) S: [-9,-2147483648)
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define void @test-addrec-nsw-start-neg-strip-pos(float* %input, i32 %offset, i32 %numIterations) {
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entry:
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%cmp = icmp sgt i32 %offset, -10
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%min = select i1 %cmp, i32 %offset, i32 -10
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br label %loop
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loop:
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%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
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%nexti = add nsw i32 %i, 1
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%index32 = add nsw i32 %nexti, %min
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%ptr = getelementptr inbounds float, float* %input, i32 %index32
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%f = load float, float* %ptr, align 4
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%exitcond = icmp eq i32 %nexti, %numIterations
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br i1 %exitcond, label %exit, label %loop
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exit:
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ret void
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}
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