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; This testcase ensures that CFL AA answers queries soundly when callee tries
; to return an unknown pointer
; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
@g = external global i32
define i32* @return_unknown_callee(i32* %arg1, i32* %arg2) {
ret i32* @g
}
; CHECK-LABEL: Function: test_return_unknown
; CHECK-DAG: NoAlias: i32* %a, i32* %b
; CHECK-DAG: MayAlias: i32* %c, i32* %x
; CHECK-DAG: NoAlias: i32* %a, i32* %c
; CHECK-DAG: NoAlias: i32* %b, i32* %c
define void @test_return_unknown(i32* %x) {
%a = alloca i32, align 4
%b = alloca i32, align 4
%c = call i32* @return_unknown_callee(i32* %a, i32* %b)
load i32, i32* %a
load i32, i32* %b
load i32, i32* %c
load i32, i32* %x
ret void
}
@g2 = external global i32*
define i32** @return_unknown_callee2() {
ret i32** @g2
}
; CHECK-LABEL: Function: test_return_unknown2
; CHECK-DAG: MayAlias: i32** %a, i32* %x
; CHECK-DAG: MayAlias: i32* %b, i32* %x
; CHECK-DAG: MayAlias: i32** %a, i32* %b
define void @test_return_unknown2(i32* %x) {
%a = call i32** @return_unknown_callee2()
%b = load i32*, i32** %a
load i32, i32* %b
load i32, i32* %x
ret void
}
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