1 ; This testcase ensures that CFL AA answers queries soundly when callee tries 2 ; to mutate the memory pointed to by its parameters 3 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 6 7 declare noalias i8* @malloc(i64) 8 9 define void @store_arg_multilevel_callee(i32*** %arg1, i32* %arg2) { 10 %ptr = call noalias i8* @malloc(i64 8) 11 %ptr_cast = bitcast i8* %ptr to i32** 12 store i32* %arg2, i32** %ptr_cast 13 store i32** %ptr_cast, i32*** %arg1 14 ret void 15 } 16 ; CHECK-LABEL: Function: test_store_arg_multilevel 17 ; CHECK: NoAlias: i32* %a, i32** %lpp 18 ; CHECK: NoAlias: i32* %b, i32** %lpp 19 ; CHECK: MayAlias: i32** %lpp, i32** %p 20 ; CHECK: MayAlias: i32* %a, i32* %lpp_deref 21 ; CHECK: MayAlias: i32* %b, i32* %lpp_deref 22 ; CHECK: NoAlias: i32* %lpp_deref, i32** %p 23 ; CHECK: NoAlias: i32* %lpp_deref, i32*** %pp 24 ; CHECK: NoAlias: i32* %lpp_deref, i32** %lpp 25 ; CHECK: MayAlias: i32* %a, i32* %lp 26 ; CHECK: NoAlias: i32* %lp, i32*** %pp 27 ; CHECK: NoAlias: i32* %lp, i32** %lpp 28 ; CHECK: MayAlias: i32* %lp, i32* %lpp_deref 29 30 ; We could've proven the following facts if the analysis were inclusion-based: 31 ; NoAlias: i32* %a, i32* %b 32 ; NoAlias: i32* %b, i32* %lp 33 define void @test_store_arg_multilevel() { 34 %a = alloca i32, align 4 35 %b = alloca i32, align 4 36 %p = alloca i32*, align 8 37 %pp = alloca i32**, align 8 38 39 store i32* %a, i32** %p 40 store i32** %p, i32*** %pp 41 call void @store_arg_multilevel_callee(i32*** %pp, i32* %b) 42 43 %lpp = load i32**, i32*** %pp 44 %lpp_deref = load i32*, i32** %lpp 45 %lp = load i32*, i32** %p 46 47 ret void 48 }
