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| author | Dan Gohman <gohman@apple.com> | 2012-09-13 21:51:01 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2012-09-13 21:51:01 +0000 |
| commit | b998913ff4aa58c3c342e167c785029cb331078e (patch) | |
| tree | 8c8bd3746fbbae761608a9fdff27ab29ea37b4b7 /test/Transforms/InstCombine/struct-assign-tbaa.ll | |
| parent | e940c1bb6c976539f07d6f440aeaacf7c25e1ddc (diff) | |
| download | llvm-b998913ff4aa58c3c342e167c785029cb331078e.tar.gz llvm-b998913ff4aa58c3c342e167c785029cb331078e.tar.bz2 llvm-b998913ff4aa58c3c342e167c785029cb331078e.tar.xz | |
Handle the new !tbaa.struct metadata tags when converting a memcpy into scalar
loads and stores.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163844 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/struct-assign-tbaa.ll')
| -rw-r--r-- | test/Transforms/InstCombine/struct-assign-tbaa.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/struct-assign-tbaa.ll b/test/Transforms/InstCombine/struct-assign-tbaa.ll new file mode 100644 index 0000000000..4fbdb0ab67 --- /dev/null +++ b/test/Transforms/InstCombine/struct-assign-tbaa.ll @@ -0,0 +1,26 @@ +; RUN: opt -instcombine -S < %s | FileCheck %s + +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" + +%struct.foo = type { float } + +; Verify that instcombine preserves TBAA tags when converting a memcpy into +; a scalar load and store. + +; CHECK: %2 = load float* %0, align 4, !tbaa !0 +; CHECK: store float %2, float* %1, align 4, !tbaa !0 +; CHECK: !0 = metadata !{metadata !"float", metadata !1} +define void @test(%struct.foo* nocapture %a, %struct.foo* nocapture %b) { +entry: + %0 = bitcast %struct.foo* %a to i8* + %1 = bitcast %struct.foo* %b to i8* + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %1, i64 4, i32 4, i1 false), !tbaa.struct !3 + ret void +} + +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind + +!0 = metadata !{metadata !"Simple C/C++ TBAA"} +!1 = metadata !{metadata !"omnipotent char", metadata !0} +!2 = metadata !{metadata !"float", metadata !0} +!3 = metadata !{i64 0, i64 4, metadata !2} |