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Diffstat (limited to 'test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll')
| -rw-r--r-- | test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll b/test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll new file mode 100644 index 0000000..6475471 --- /dev/null +++ b/test/Analysis/BasicAA/2009-10-13-AtomicModRef.ll @@ -0,0 +1,17 @@ +; RUN: opt -gvn -instcombine -S < %s | FileCheck %s +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" + +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 +} |