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| author | Owen Anderson <resistor@mac.com> | 2011-09-06 23:33:25 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2011-09-06 23:33:25 +0000 |
| commit | 69acc93b3de6854732a6d91b581c3c29b59bb315 (patch) | |
| tree | 77f25d822e627c9e81cd1ed78290b65219a20dc5 /test | |
| parent | 218affc710a0165746ec21a3315c6cc68272cfd5 (diff) | |
| download | external_llvm-69acc93b3de6854732a6d91b581c3c29b59bb315.zip external_llvm-69acc93b3de6854732a6d91b581c3c29b59bb315.tar.gz external_llvm-69acc93b3de6854732a6d91b581c3c29b59bb315.tar.bz2 | |
Teach BasicAA about the aliasing properties of memset_pattern16.
Fixes PR10872 and <rdar://problem/10065079>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139204 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Analysis/BasicAA/memset_pattern.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/Analysis/BasicAA/memset_pattern.ll b/test/Analysis/BasicAA/memset_pattern.ll new file mode 100644 index 0000000..590664c --- /dev/null +++ b/test/Analysis/BasicAA/memset_pattern.ll @@ -0,0 +1,21 @@ +; RUN: opt -S -basicaa -gvn < %s | FileCheck %s +; PR10872 +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" +target triple = "x86_64-apple-macosx10.7" + +@z = internal global i32 0, align 4 +@y = internal global i32 0, align 4 +@x = internal constant i32 0, align 4 + +; CHECK: @test +define i32 @test() nounwind uwtable ssp { +entry: + store i32 1, i32* @z + tail call void @memset_pattern16(i8* bitcast (i32* @y to i8*), i8* bitcast (i32* @x to i8*), i64 4) nounwind +; CHECK-NOT: load + %l = load i32* @z +; CHECK: ret i32 1 + ret i32 %l +} + +declare void @memset_pattern16(i8*, i8*, i64) |