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Diffstat (limited to 'test/Analysis/BasicAA/cas.ll')
| -rw-r--r-- | test/Analysis/BasicAA/cas.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/cas.ll b/test/Analysis/BasicAA/cas.ll new file mode 100644 index 000000000000..9bbb5e7c373e --- /dev/null +++ b/test/Analysis/BasicAA/cas.ll @@ -0,0 +1,14 @@ +; 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
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