llvm-project

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; RUN: opt -aa-pipeline=basic-aa -passes=gvn,instcombine -S < %s | FileCheck %s
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target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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define i8 @foo(ptr %ptr) {
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  %Q = getelementptr i8, ptr %ptr, i32 1
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; CHECK: getelementptr
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  %X = load i8, ptr %ptr
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  %Y = atomicrmw add ptr %Q, i8 1 monotonic
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  %Z = load i8, ptr %ptr
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; CHECK-NOT: = load
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  %A = sub i8 %X, %Z
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  ret i8 %A
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; CHECK: ret i8 0
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}
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