1; This testcase ensures that CFL AA answers queries soundly when callee tries
2; to return an escaped pointer
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
7declare noalias i8* @malloc(i64)
8declare void @opaque(i32*)
9
10define i32* @return_escaped_callee() {
11	%ptr = call noalias i8* @malloc(i64 8)
12	%ptr_cast = bitcast i8* %ptr to i32*
13	call void @opaque(i32* %ptr_cast)
14	ret i32* %ptr_cast
15}
16; CHECK-LABEL: Function: test_return_escape
17; CHECK: NoAlias: i32* %a, i32** %x
18; CHECK: NoAlias: i32* %b, i32** %x
19; CHECK: NoAlias: i32* %a, i32* %b
20; CHECK: NoAlias: i32* %c, i32** %x
21; CHECK: NoAlias: i32* %a, i32* %c
22; CHECK: NoAlias: i32* %b, i32* %c
23; CHECK: NoAlias: i32* %a, i32* %d
24; CHECK: MayAlias: i32* %b, i32* %d
25; CHECK: MayAlias: i32* %c, i32* %d
26define void @test_return_escape(i32** %x) {
27  %a = alloca i32, align 4
28  %b = call i32* @return_escaped_callee()
29  %c = call i32* @return_escaped_callee()
30  %d = load i32*, i32** %x
31
32  ret void
33}