1 ; This testcase ensures that CFL AA answers queries soundly when callee tries
2 ; to return the multi-level dereference of one of its parameters
4 ; RUN: opt < %s -disable-basicaa -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 define i32* @return_deref_arg_multilevel_callee(i32*** %arg1) {
8 %deref = load i32**, i32*** %arg1
9 %deref2 = load i32*, i32** %deref
12 ; CHECK-LABEL: Function: test_return_deref_arg_multilevel
13 ; CHECK: NoAlias: i32* %a, i32* %b
14 ; CHECK: MayAlias: i32* %a, i32* %c
15 ; CHECK: NoAlias: i32* %b, i32* %c
16 ; CHECK: NoAlias: i32* %c, i32** %p
17 ; CHECK: NoAlias: i32* %c, i32*** %pp
18 ; CHECK: MayAlias: i32** %lpp, i32** %p
19 ; CHECK: NoAlias: i32** %lpp, i32*** %pp
20 ; CHECK: NoAlias: i32* %c, i32** %lpp
21 ; CHECK: MayAlias: i32* %a, i32* %lpp_deref
22 ; CHECK: NoAlias: i32* %b, i32* %lpp_deref
23 ; CHECK: NoAlias: i32* %lpp_deref, i32*** %pp
24 ; CHECK: MayAlias: i32* %a, i32* %lp
25 ; CHECK: NoAlias: i32* %b, i32* %lp
26 ; CHECK: NoAlias: i32* %lp, i32** %p
27 ; CHECK: NoAlias: i32* %lp, i32*** %pp
28 ; CHECK: MayAlias: i32* %c, i32* %lp
29 ; CHECK: NoAlias: i32* %lp, i32** %lpp
30 ; CHECK: MayAlias: i32* %lp, i32* %lpp_deref
32 ; Temporarily disable modref checks
33 ; Just Ref: Ptr: i32** %p <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp)
34 ; Just Ref: Ptr: i32*** %pp <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp)
35 ; Just Ref: Ptr: i32** %lpp <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp)
37 define void @test_return_deref_arg_multilevel() {
38 %a = alloca i32, align 4
39 %b = alloca i32, align 4
40 %p = alloca i32*, align 8
41 %pp = alloca i32**, align 8
43 store i32* %a, i32** %p
44 store i32** %p, i32*** %pp
45 %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp)
47 %lpp = load i32**, i32*** %pp
48 %lpp_deref = load i32*, i32** %lpp
49 %lp = load i32*, i32** %p