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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 | 653cb031915219fb97c51a1b8120a5b7cc8a6c47 (patch) | |
| tree | 90f3856a1c9f029093213cef30ad0f0d827b2325 /llvm/test/Analysis/BasicAA/memset_pattern.ll | |
| parent | 6dd3f39daeff5c14bf8cacad786d74463b800948 (diff) | |
| download | bcm5719-llvm-653cb031915219fb97c51a1b8120a5b7cc8a6c47.tar.gz bcm5719-llvm-653cb031915219fb97c51a1b8120a5b7cc8a6c47.zip | |
Teach BasicAA about the aliasing properties of memset_pattern16.
Fixes PR10872 and <rdar://problem/10065079>.
llvm-svn: 139204
Diffstat (limited to 'llvm/test/Analysis/BasicAA/memset_pattern.ll')
| -rw-r--r-- | llvm/test/Analysis/BasicAA/memset_pattern.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/llvm/test/Analysis/BasicAA/memset_pattern.ll b/llvm/test/Analysis/BasicAA/memset_pattern.ll new file mode 100644 index 00000000000..590664c5084 --- /dev/null +++ b/llvm/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) |
