1; This testcase ensures that CFL AA answers queries soundly when callee tries
2; to mutate the memory pointed to by its parameters
3
4; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
5
6@g = external global i32
7
8define void @store_arg_unknown_callee(i32** %arg1) {
9	store i32* @g, i32** %arg1
10	ret void
11}
12; CHECK-LABEL: Function: test_store_arg_unknown
13; CHECK: NoAlias: i32** %p, i32* %x
14; CHECK: NoAlias: i32* %a, i32** %p
15; CHECK: NoAlias: i32* %b, i32** %p
16; CHECK: MayAlias: i32* %lp, i32* %x
17; CHECK: MayAlias: i32* %a, i32* %lp
18; CHECK: NoAlias: i32* %b, i32* %lp
19; CHECK: NoAlias: i32* %lp, i32** %p
20define void @test_store_arg_unknown(i32* %x) {
21  %a = alloca i32, align 4
22  %b = alloca i32, align 4
23  %p = alloca i32*, align 8
24
25  load i32, i32* %x
26  load i32, i32* %a
27  load i32, i32* %b
28  store i32* %a, i32** %p
29  call void @store_arg_unknown_callee(i32** %p)
30
31  %lp = load i32*, i32** %p
32  load i32, i32* %lp
33
34  ret void
35}
36