1 ; This testcase ensures that CFL AA answers queries soundly when callee tries 2 ; to return the multi-level dereference of one of its parameters 3 4 ; RUN: opt < %s -disable-basicaa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s 5 ; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s 6 7 define i32* @return_deref_arg_multilevel_callee(i32*** %arg1) { 8 %deref = load i32**, i32*** %arg1 9 %deref2 = load i32*, i32** %deref 10 ret i32* %deref2 11 } 12 ; CHECK-LABEL: Function: test_return_deref_arg_multilevel 13 ; CHECK: NoAlias: i32* %a, i32* %b 14 ; CHECK: MayAlias: i32* %a, i32* %c 15 ; CHECK: NoAlias: i32* %b, i32* %c 16 ; CHECK: NoAlias: i32* %c, i32** %p 17 ; CHECK: NoAlias: i32* %c, i32*** %pp 18 ; CHECK: MayAlias: i32** %lpp, i32** %p 19 ; CHECK: NoAlias: i32** %lpp, i32*** %pp 20 ; CHECK: NoAlias: i32* %c, i32** %lpp 21 ; CHECK: MayAlias: i32* %a, i32* %lpp_deref 22 ; CHECK: NoAlias: i32* %b, i32* %lpp_deref 23 ; CHECK: NoAlias: i32* %lpp_deref, i32*** %pp 24 ; CHECK: MayAlias: i32* %a, i32* %lp 25 ; CHECK: NoAlias: i32* %b, i32* %lp 26 ; CHECK: NoAlias: i32* %lp, i32** %p 27 ; CHECK: NoAlias: i32* %lp, i32*** %pp 28 ; CHECK: MayAlias: i32* %c, i32* %lp 29 ; CHECK: NoAlias: i32* %lp, i32** %lpp 30 ; CHECK: MayAlias: i32* %lp, i32* %lpp_deref 31 32 ; Temporarily disable modref checks 33 ; Just Ref: Ptr: i32** %p <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp) 34 ; Just Ref: Ptr: i32*** %pp <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp) 35 ; Just Ref: Ptr: i32** %lpp <-> %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp) 36 37 define void @test_return_deref_arg_multilevel() { 38 %a = alloca i32, align 4 39 %b = alloca i32, align 4 40 %p = alloca i32*, align 8 41 %pp = alloca i32**, align 8 42 43 store i32* %a, i32** %p 44 store i32** %p, i32*** %pp 45 %c = call i32* @return_deref_arg_multilevel_callee(i32*** %pp) 46 47 %lpp = load i32**, i32*** %pp 48 %lpp_deref = load i32*, i32** %lpp 49 %lp = load i32*, i32** %p 50 51 ret void 52 }
