| ; This testcase ensures that CFL AA answers queries soundly when callee tries |
| ; to return one of its parameters |
| |
| ; RUN: opt < %s -disable-basicaa -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_arg_callee(i32* %arg1, i32* %arg2) { |
| ret i32* %arg1 |
| } |
| ; CHECK-LABEL: Function: test_return_arg |
| ; CHECK: NoAlias: i32* %a, i32* %b |
| ; CHECK: MayAlias: i32* %a, i32* %c |
| ; CHECK: NoAlias: i32* %b, i32* %c |
| |
| ; Temporarily disable modref checks |
| ; NoModRef: Ptr: i32* %a <-> %c = call i32* @return_arg_callee(i32* %a, i32* %b) |
| ; NoModRef: Ptr: i32* %b <-> %c = call i32* @return_arg_callee(i32* %a, i32* %b) |
| ; NoModRef: Ptr: i32* %c <-> %c = call i32* @return_arg_callee(i32* %a, i32* %b) |
| define void @test_return_arg() { |
| %a = alloca i32, align 4 |
| %b = alloca i32, align 4 |
| |
| %c = call i32* @return_arg_callee(i32* %a, i32* %b) |
| |
| ret void |
| } |