1; This testcase ensures that CFL AA answers queries soundly when callee tries
2; to return the dereference of one of its parameters
3
4; RUN: opt < %s -disable-basic-aa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
5; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
6
7define i32* @return_deref_arg_callee(i32** %arg1) {
8	%deref = load i32*, i32** %arg1
9	ret i32* %deref
10}
11; CHECK-LABEL: Function: test_return_deref_arg
12; CHECK: NoAlias: i32* %a, i32* %b
13; CHECK: MayAlias: i32* %a, i32* %c
14; CHECK: NoAlias: i32* %b, i32* %c
15; CHECK: MayAlias: i32* %a, i32* %lp
16; CHECK: NoAlias: i32* %b, i32* %lp
17; CHECK: NoAlias: i32* %lp, i32** %p
18; CHECK: MayAlias: i32* %c, i32* %lp
19define void @test_return_deref_arg() {
20  %a = alloca i32, align 4
21  %b = alloca i32, align 4
22  %p = alloca i32*, align 8
23
24  store i32* %a, i32** %p
25  %c = call i32* @return_deref_arg_callee(i32** %p)
26
27  %lp = load i32*, i32** %p
28
29  ret void
30}