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      1 ; This testcase ensures that CFL AA answers queries soundly when callee tries 
      2 ; to return the dereference of one of its parameters
      3 
      4 ; RUN: opt < %s -disable-basicaa -cfl-anders-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
      5 ; RUN: opt < %s -aa-pipeline=cfl-anders-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
      6 
      7 define i32* @return_deref_arg_callee(i32** %arg1) {
      8   %deref = load i32*, i32** %arg1
      9   ret i32* %deref
     10 }
     11 ; CHECK-LABEL: Function: test_return_deref_arg
     12 ; CHECK: NoAlias: i32* %a, i32* %b
     13 ; CHECK: MayAlias: i32* %a, i32* %c
     14 ; CHECK: NoAlias: i32* %b, i32* %c
     15 ; CHECK: MayAlias: i32* %a, i32* %lp
     16 ; CHECK: NoAlias: i32* %b, i32* %lp
     17 ; CHECK: NoAlias: i32* %lp, i32** %p
     18 ; CHECK: MayAlias: i32* %c, i32* %lp
     19 
     20 ; Temporarily disable modref checks
     21 ; NoModRef: Ptr: i32* %a <-> %c = call i32* @return_deref_arg_callee(i32** %p)
     22 ; NoModRef: Ptr: i32* %b <-> %c = call i32* @return_deref_arg_callee(i32** %p)
     23 ; Just Ref: Ptr: i32** %p <-> %c = call i32* @return_deref_arg_callee(i32** %p)
     24 ; NoModRef: Ptr: i32* %c <-> %c = call i32* @return_deref_arg_callee(i32** %p)
     25 ; NoModRef: Ptr: i32* %lp <-> %c = call i32* @return_deref_arg_callee(i32** %p)
     26 define void @test_return_deref_arg() {
     27   %a = alloca i32, align 4
     28   %b = alloca i32, align 4
     29   %p = alloca i32*, align 8
     30 
     31   store i32* %a, i32** %p
     32   %c = call i32* @return_deref_arg_callee(i32** %p)
     33 
     34   %lp = load i32*, i32** %p
     35 
     36   ret void
     37 }