llvm-6502/test/Analysis/BasicAA/cas.ll

14 lines
375 B
LLVM
Raw Normal View History

; RUN: llvm-as < %s | opt -basicaa -gvn | llvm-dis | grep load | count 1
@flag0 = internal global i32 zeroinitializer
@turn = internal global i32 zeroinitializer
define i32 @main() {
%a = load i32* @flag0
%b = tail call i32 @llvm.atomic.swap.i32.p0i32(i32* @turn, i32 1)
%c = load i32* @flag0
ret i32 %c
}
declare i32 @llvm.atomic.swap.i32.p0i32(i32*, i32) nounwind