forked from OSchip/llvm-project
17 lines
398 B
LLVM
17 lines
398 B
LLVM
; RUN: opt -gvn -instcombine -S < %s | FileCheck %s
|
|
|
|
declare i8 @llvm.atomic.load.add.i8.p0i8(i8*, i8)
|
|
|
|
define i8 @foo(i8* %ptr) {
|
|
%P = getelementptr i8* %ptr, i32 0
|
|
%Q = getelementptr i8* %ptr, i32 1
|
|
; CHECK: getelementptr
|
|
%X = load i8* %P
|
|
%Y = call i8 @llvm.atomic.load.add.i8.p0i8(i8* %Q, i8 1)
|
|
%Z = load i8* %P
|
|
; CHECK-NOT: = load
|
|
%A = sub i8 %X, %Z
|
|
ret i8 %A
|
|
; CHECK: ret i8 0
|
|
}
|