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| author | Hans Wennborg <hans@hanshq.net> | 2015-02-09 03:35:35 +0000 |
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| committer | Hans Wennborg <hans@hanshq.net> | 2015-02-09 03:35:35 +0000 |
| commit | 412f882ee0609da404126a768ece6e58d276898a (patch) | |
| tree | 683e7c4a3f99561cd44245f5e0544346b466207b /test | |
| parent | a370ce2421aa739a448a4a0edd456e804ee23257 (diff) | |
| download | llvm-412f882ee0609da404126a768ece6e58d276898a.tar.gz | |
Merging r228525:
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r228525 | bsteinbr | 2015-02-08 09:07:14 -0800 (Sun, 08 Feb 2015) | 14 lines
Correctly combine alias.scope metadata by a union instead of intersecting
Summary:
The alias.scope metadata represents sets of things an instruction might
alias with. When generically combining the metadata from two
instructions the result must be the union of the original sets, because
the new instruction might alias with anything any of the original
instructions aliased with.
Reviewers: hfinkel
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D7490
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_36@228561 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/Util/combine-alias-scope-metadata.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/Util/combine-alias-scope-metadata.ll b/test/Transforms/Util/combine-alias-scope-metadata.ll new file mode 100644 index 00000000000..fd0a3d5c5b9 --- /dev/null +++ b/test/Transforms/Util/combine-alias-scope-metadata.ll @@ -0,0 +1,24 @@ +; RUN: opt < %s -S -basicaa -memcpyopt | FileCheck %s +target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" + +define void @test(i8* noalias dereferenceable(1) %in, i8* noalias dereferenceable(1) %out) { + %tmp = alloca i8 + %tmp2 = alloca i8 +; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 1, i32 8, i1 false) + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp, i8* %in, i64 1, i32 8, i1 false), !alias.scope !4 + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp2, i8* %tmp, i64 1, i32 8, i1 false), !alias.scope !5 + + call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %tmp2, i64 1, i32 8, i1 false), !noalias !6 + + ret void +} + +declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1) + +!0 = !{!0} +!1 = distinct !{!1, !0, !"in"} +!2 = distinct !{!2, !0, !"tmp"} +!3 = distinct !{!3, !0, !"tmp2"} +!4 = distinct !{!1, !2} +!5 = distinct !{!2, !3} +!6 = distinct !{!1, !2} |