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
6define void @store_arg_callee(i32** %arg1, i32* %arg2) {
7	store i32* %arg2, i32** %arg1
8	ret void
9}
10; CHECK-LABEL: Function: test_store_arg
11; CHECK: NoAlias: i32* %a, i32* %b
12; CHECK: NoAlias: i32* %a, i32** %p
13; CHECK: NoAlias: i32* %b, i32** %p
14; CHECK: MayAlias: i32* %a, i32* %lp
15; CHECK: MayAlias: i32* %b, i32* %lp
16; CHECK: NoAlias: i32* %a, i32* %lq
17; CHECK: MayAlias: i32* %b, i32* %lq
18; CHECK: MayAlias: i32* %lp, i32* %lq
19
20; Temporarily disable modref checks
21; NoModRef: Ptr: i32* %a <-> call void @store_arg_callee(i32** %p, i32* %b)
22; Just Ref: Ptr: i32* %b <-> call void @store_arg_callee(i32** %p, i32* %b)
23; Just Mod: Ptr: i32** %p  <-> call void @store_arg_callee(i32** %p, i32* %b)
24; NoModRef: Ptr: i32** %q  <-> call void @store_arg_callee(i32** %p, i32* %b)
25define void @test_store_arg() {
26  %a = alloca i32, align 4
27  %b = alloca i32, align 4
28  %p = alloca i32*, align 8
29  %q = alloca i32*, align 8
30
31  load i32, i32* %a
32  load i32, i32* %b
33  store i32* %a, i32** %p
34  store i32* %b, i32** %q
35  call void @store_arg_callee(i32** %p, i32* %b)
36
37  %lp = load i32*, i32** %p
38  %lq = load i32*, i32** %q
39  load i32, i32* %lp
40  load i32, i32* %lq
41
42  ret void
43}
44