forked from OSchip/llvm-project
18 lines
536 B
LLVM
18 lines
536 B
LLVM
; RUN: opt -basicaa -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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declare i8 @llvm.atomic.load.add.i8.p0i8(i8*, i8)
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define i8 @foo(i8* %ptr) {
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%P = getelementptr i8* %ptr, i32 0
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%Q = getelementptr i8* %ptr, i32 1
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; CHECK: getelementptr
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%X = load i8* %P
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%Y = call i8 @llvm.atomic.load.add.i8.p0i8(i8* %Q, i8 1)
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%Z = load i8* %P
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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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