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; This testcase ensures that CFL AA answers queries soundly when callee tries
; to return the reference of one of 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 i32** @return_ref_arg_callee(i32* %arg1) {
%ptr = call noalias i8* @malloc(i64 8)
%ptr_cast = bitcast i8* %ptr to i32**
store i32* %arg1, i32** %ptr_cast
ret i32** %ptr_cast
}
; CHECK-LABEL: Function: test_return_ref_arg
; CHECK: NoAlias: i32** %b, i32** %p
; CHECK: MayAlias: i32* %a, i32* %lb
; CHECK: NoAlias: i32* %lb, i32** %p
; CHECK: NoAlias: i32* %lb, i32** %b
; CHECK: NoAlias: i32* %lp, i32** %p
; CHECK: NoAlias: i32* %lp, i32** %b
; CHECK: MayAlias: i32* %lb, i32* %lp
; Temporarily disable modref checks
; Just Mod: Ptr: i32** %b <-> %b = call i32** @return_ref_arg_callee(i32* %a)
define void @test_return_ref_arg() {
%a = alloca i32, align 4
%p = alloca i32*, align 8
store i32* %a, i32** %p
%b = call i32** @return_ref_arg_callee(i32* %a)
%lb = load i32*, i32** %b
%lp = load i32*, i32** %p
ret void
}
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