1 ; This testcase ensures that CFL AA answers queries soundly when callee tries
2 ; to escape the memory pointed to by its parameters
4 ; RUN: opt < %s -disable-basicaa -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
7 declare void @opaque(i32*)
8 define void @escape_arg_deref(i32** %arg) {
9 %arg_deref = load i32*, i32** %arg
10 call void @opaque(i32* %arg_deref)
13 ; CHECK-LABEL: Function: test_arg_deref_escape
14 ; CHECK: NoAlias: i32* %a, i32** %x
15 ; CHECK: NoAlias: i32* %b, i32** %x
16 ; CHECK: NoAlias: i32* %a, i32* %b
17 ; CHECK: NoAlias: i32** %p, i32** %x
18 ; CHECK: NoAlias: i32* %a, i32** %p
19 ; CHECK: NoAlias: i32* %b, i32** %p
20 ; CHECK: MayAlias: i32* %a, i32* %c
21 ; CHECK: NoAlias: i32* %b, i32* %c
22 ; CHECK: NoAlias: i32* %c, i32** %p
23 define void @test_arg_deref_escape(i32** %x) {
24 %a = alloca i32, align 4
25 %b = alloca i32, align 4
26 %p = alloca i32*, align 4
28 store i32* %a, i32** %p
29 call void @escape_arg_deref(i32** %p)
30 %c = load i32*, i32** %x