llvm/test/Analysis/BasicAA/memset_pattern.ll
Owen Anderson 69acc93b3d 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
2011-09-06 23:33:25 +00:00

22 lines
692 B
LLVM

; 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)