forked from OSchip/llvm-project
15 lines
328 B
LLVM
15 lines
328 B
LLVM
; RUN: opt < %s -basicaa -gvn -instcombine -S | FileCheck %s
|
|
|
|
@flag0 = internal global i32 zeroinitializer
|
|
@turn = internal global i32 zeroinitializer
|
|
|
|
; CHECK: ret i32 0
|
|
|
|
define i32 @main() {
|
|
%a = load i32* @flag0
|
|
%b = atomicrmw xchg i32* @turn, i32 1 monotonic
|
|
%c = load i32* @flag0
|
|
%d = sub i32 %a, %c
|
|
ret i32 %d
|
|
}
|