1 ; This testcase ensures that CFL AA answers queries soundly when callee tries
2 ; to return the multi-level reference of one of its parameters
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
7 declare noalias i8* @malloc(i64)
9 define i32*** @return_ref_arg_multilevel_callee(i32* %arg1) {
10 %ptr = call noalias i8* @malloc(i64 8)
11 %ptr_cast = bitcast i8* %ptr to i32***
12 %ptr2 = call noalias i8* @malloc(i64 8)
13 %ptr_cast2 = bitcast i8* %ptr2 to i32**
14 store i32* %arg1, i32** %ptr_cast2
15 store i32** %ptr_cast2, i32*** %ptr_cast
18 ; CHECK-LABEL: Function: test_return_ref_arg_multilevel
19 ; CHECK: NoAlias: i32* %a, i32*** %b
20 ; CHECK: NoAlias: i32** %p, i32*** %b
21 ; CHECK: NoAlias: i32*** %b, i32*** %pp
22 ; CHECK: NoAlias: i32* %a, i32** %lb
23 ; CHECK: NoAlias: i32** %lb, i32** %p
24 ; CHECK: NoAlias: i32** %lb, i32*** %pp
25 ; CHECK: NoAlias: i32** %lb, i32*** %b
26 ; CHECK: MayAlias: i32* %a, i32* %lb_deref
27 ; CHECK: NoAlias: i32* %lb_deref, i32** %lpp
28 ; CHECK: MayAlias: i32* %lb_deref, i32* %lpp_deref
29 ; CHECK: NoAlias: i32* %lpp_deref, i32** %lpp
30 ; CHECK: MayAlias: i32* %lb_deref, i32* %lp
31 ; CHECK: NoAlias: i32* %lp, i32** %lpp
32 ; CHECK: MayAlias: i32* %lp, i32* %lpp_deref
34 ; Temporarily disable modref checks
35 ; Just Mod: Ptr: i32*** %b <-> %b = call i32*** @return_ref_arg_multilevel_callee(i32* %a)
36 ; Just Mod: Ptr: i32** %lb <-> %b = call i32*** @return_ref_arg_multilevel_callee(i32* %a)
37 define void @test_return_ref_arg_multilevel() {
38 %a = alloca i32, align 4
39 %p = alloca i32*, align 8
40 %pp = alloca i32**, align 8
42 store i32* %a, i32** %p
43 store i32** %p, i32*** %pp
44 %b = call i32*** @return_ref_arg_multilevel_callee(i32* %a)
46 %lb = load i32**, i32*** %b
47 %lb_deref = load i32*, i32** %lb
48 %lpp = load i32**, i32*** %pp
49 %lpp_deref = load i32*, i32** %lpp
50 %lp = load i32*, i32** %p