blob: e520de4d0b1c1368108f5fb15f468fe451ca54ba [file] [log] [blame]
; 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-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
define void @store_arg_callee(i32** %arg1, i32* %arg2) {
store i32* %arg2, i32** %arg1
ret void
}
; CHECK-LABEL: Function: test_store_arg
; CHECK: NoAlias: i32* %a, i32** %p
; CHECK: NoAlias: i32* %b, i32** %p
; CHECK: MayAlias: i32* %a, i32* %lp
; CHECK: MayAlias: i32* %b, i32* %lp
; CHECK: MayAlias: i32* %b, i32* %lq
; CHECK: MayAlias: i32* %lp, i32* %lq
; We could've proven the following facts if the analysis were inclusion-based:
; NoAlias: i32* %a, i32* %b
; NoAlias: i32* %a, i32* %lq
define void @test_store_arg() {
%a = alloca i32, align 4
%b = alloca i32, align 4
%p = alloca i32*, align 8
%q = alloca i32*, align 8
store i32* %a, i32** %p
store i32* %b, i32** %q
call void @store_arg_callee(i32** %p, i32* %b)
%lp = load i32*, i32** %p
%lq = load i32*, i32** %q
ret void
}