| ; This testcase ensures that CFL AA answers queries soundly when callee tries |
| ; to mutate the memory pointed to by its parameters |
| |
| ; RUN: opt < %s -disable-basic-aa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| ; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| |
| declare noalias i8* @malloc(i64) |
| |
| define void @store_arg_multilevel_callee(i32*** %arg1, i32* %arg2) { |
| %ptr = call noalias i8* @malloc(i64 8) |
| %ptr_cast = bitcast i8* %ptr to i32** |
| store i32* %arg2, i32** %ptr_cast |
| store i32** %ptr_cast, i32*** %arg1 |
| ret void |
| } |
| ; CHECK-LABEL: Function: test_store_arg_multilevel |
| ; CHECK: NoAlias: i32* %a, i32* %b |
| ; CHECK: NoAlias: i32* %a, i32** %lpp |
| ; CHECK: NoAlias: i32* %b, i32** %lpp |
| ; CHECK: MayAlias: i32** %lpp, i32** %p |
| ; CHECK: MayAlias: i32* %a, i32* %lpp_deref |
| ; CHECK: MayAlias: i32* %b, i32* %lpp_deref |
| ; CHECK: NoAlias: i32* %lpp_deref, i32** %p |
| ; CHECK: NoAlias: i32* %lpp_deref, i32*** %pp |
| ; CHECK: NoAlias: i32* %lpp_deref, i32** %lpp |
| ; CHECK: MayAlias: i32* %a, i32* %lp |
| ; CHECK: NoAlias: i32* %lp, i32*** %pp |
| ; CHECK: NoAlias: i32* %lp, i32** %lpp |
| ; CHECK: MayAlias: i32* %lp, i32* %lpp_deref |
| define void @test_store_arg_multilevel() { |
| %a = alloca i32, align 4 |
| %b = alloca i32, align 4 |
| %p = alloca i32*, align 8 |
| %pp = alloca i32**, align 8 |
| |
| store i32* %a, i32** %p |
| store i32** %p, i32*** %pp |
| call void @store_arg_multilevel_callee(i32*** %pp, i32* %b) |
| |
| %lpp = load i32**, i32*** %pp |
| %lpp_deref = load i32*, i32** %lpp |
| %lp = load i32*, i32** %p |
| |
| ret void |
| } |