Home | History | Annotate | Download | only in Steensgaard 
      1 ; This testcase ensures that CFL AA answers queries soundly when callee tries 
      2 ; to escape the memory pointed to by its parameters
      3 
      4 ; RUN: opt < %s -disable-basicaa -cfl-steens-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
      5 ; RUN: opt < %s -aa-pipeline=cfl-steens-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
      6 
      7 declare void @opaque(i32*)
      8 define void @escape_arg_deref(i32** %arg) {
      9 	%arg_deref = load i32*, i32** %arg
     10 	call void @opaque(i32* %arg_deref)
     11 	ret void
     12 }
     13 ; CHECK-LABEL: Function: test_arg_deref_escape
     14 ; CHECK: NoAlias: i32* %a, i32** %x
     15 ; CHECK: NoAlias: i32* %b, i32** %x
     16 ; CHECK: NoAlias: i32* %a, i32* %b
     17 ; CHECK: NoAlias: i32** %p, i32** %x
     18 ; CHECK: NoAlias: i32* %a, i32** %p
     19 ; CHECK: NoAlias: i32* %b, i32** %p
     20 ; CHECK: MayAlias: i32* %a, i32* %c
     21 ; CHECK: NoAlias: i32* %b, i32* %c
     22 ; CHECK: NoAlias: i32* %c, i32** %p
     23 define void @test_arg_deref_escape(i32** %x) {
     24   %a = alloca i32, align 4
     25   %b = alloca i32, align 4
     26   %p = alloca i32*, align 4
     27   
     28   store i32* %a, i32** %p
     29   call void @escape_arg_deref(i32** %p)
     30   %c = load i32*, i32** %x
     31 
     32   ret void
     33 }