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15 lines
437 B
15 lines
437 B
; RUN: opt -instsimplify -S < %s | FileCheck %s
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; CHECK-LABEL: @test
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define i1 @test(i8 %p, i8* %pq) {
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%q = load i8, i8* %pq, !range !0 ; %q is known nonzero; no known bits
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%1 = or i8 %p, 2 ; %1[1] = 1
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%2 = and i8 %1, 254 ; %2[0] = 0, %2[1] = 1
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%A = lshr i8 %2, 1 ; We should know that %A is nonzero.
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%x = icmp eq i8 %A, 0
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; CHECK: ret i1 false
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ret i1 %x
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}
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!0 = !{ i8 1, i8 5 }
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