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 -disable-basic-aa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
5; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
6
7define void @store_arg_callee(i32** %arg1, i32* %arg2) {
8	store i32* %arg2, i32** %arg1
9	ret void
10}
11; CHECK-LABEL: Function: test_store_arg
12; CHECK: NoAlias: i32* %a, i32* %b
13; CHECK: NoAlias: i32* %a, i32** %p
14; CHECK: NoAlias: i32* %b, i32** %p
15; CHECK: MayAlias: i32* %a, i32* %lp
16; CHECK: MayAlias: i32* %b, i32* %lp
17; CHECK: NoAlias: i32* %a, i32* %lq
18; CHECK: MayAlias: i32* %b, i32* %lq
19; CHECK: MayAlias: i32* %lp, i32* %lq
20
21; Temporarily disable modref checks
22; NoModRef: Ptr: i32* %a <-> call void @store_arg_callee(i32** %p, i32* %b)
23; Just Ref: Ptr: i32* %b <-> call void @store_arg_callee(i32** %p, i32* %b)
24; Just Mod: Ptr: i32** %p  <-> call void @store_arg_callee(i32** %p, i32* %b)
25; NoModRef: Ptr: i32** %q  <-> call void @store_arg_callee(i32** %p, i32* %b)
26define void @test_store_arg() {
27  %a = alloca i32, align 4
28  %b = alloca i32, align 4
29  %p = alloca i32*, align 8
30  %q = alloca i32*, align 8
31
32  store i32* %a, i32** %p
33  store i32* %b, i32** %q
34  call void @store_arg_callee(i32** %p, i32* %b)
35
36  %lp = load i32*, i32** %p
37  %lq = load i32*, i32** %q
38
39  ret void
40}