37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
; This testcase ensures that CFL AA answers queries soundly when callee tries
|
|
; to return the dereference 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
|
|
|
|
define i32* @return_deref_arg_callee(i32** %arg1) {
|
|
%deref = load i32*, i32** %arg1
|
|
ret i32* %deref
|
|
}
|
|
; CHECK-LABEL: Function: test_return_deref_arg
|
|
; CHECK: NoAlias: i32* %a, i32* %b
|
|
; CHECK: MayAlias: i32* %a, i32* %c
|
|
; CHECK: NoAlias: i32* %b, i32* %c
|
|
; CHECK: MayAlias: i32* %a, i32* %lp
|
|
; CHECK: NoAlias: i32* %b, i32* %lp
|
|
; CHECK: NoAlias: i32* %lp, i32** %p
|
|
; CHECK: MayAlias: i32* %c, i32* %lp
|
|
|
|
; Temporarily disable modref checks
|
|
; NoModRef: Ptr: i32* %a <-> %c = call i32* @return_deref_arg_callee(i32** %p)
|
|
; NoModRef: Ptr: i32* %b <-> %c = call i32* @return_deref_arg_callee(i32** %p)
|
|
; Just Ref: Ptr: i32** %p <-> %c = call i32* @return_deref_arg_callee(i32** %p)
|
|
; NoModRef: Ptr: i32* %c <-> %c = call i32* @return_deref_arg_callee(i32** %p)
|
|
; NoModRef: Ptr: i32* %lp <-> %c = call i32* @return_deref_arg_callee(i32** %p)
|
|
define void @test_return_deref_arg() {
|
|
%a = alloca i32, align 4
|
|
%b = alloca i32, align 4
|
|
%p = alloca i32*, align 8
|
|
|
|
store i32* %a, i32** %p
|
|
%c = call i32* @return_deref_arg_callee(i32** %p)
|
|
|
|
%lp = load i32*, i32** %p
|
|
|
|
ret void
|
|
} |