1 ; This testcase ensures that CFL AA answers queries soundly when callee tries 2 ; to return the dereference of one of 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 define i32* @return_deref_arg_callee(i32** %arg1) { 8 %deref = load i32*, i32** %arg1 9 ret i32* %deref 10 } 11 ; CHECK-LABEL: Function: test_return_deref_arg 12 ; CHECK: NoAlias: i32* %a, i32* %b 13 ; CHECK: MayAlias: i32* %a, i32* %c 14 ; CHECK: NoAlias: i32* %b, i32* %c 15 ; CHECK: MayAlias: i32* %a, i32* %lp 16 ; CHECK: NoAlias: i32* %b, i32* %lp 17 ; CHECK: NoAlias: i32* %lp, i32** %p 18 ; CHECK: MayAlias: i32* %c, i32* %lp 19 define void @test_return_deref_arg() { 20 %a = alloca i32, align 4 21 %b = alloca i32, align 4 22 %p = alloca i32*, align 8 23 24 store i32* %a, i32** %p 25 %c = call i32* @return_deref_arg_callee(i32** %p) 26 27 %lp = load i32*, i32** %p 28 29 ret void 30 }
