On Wed, Jun 3, 2009 at 5:34 PM, Bingfeng Mei
<b...@broadcom.com> wrote:
> Richard,
> Thanks. I tried your patch and the -fno-tree-ter, and none works. The problem
> is that
>
> decl = find_base_decl (TREE_OPERAND (inner, 0)); <--- Cannot find the
> base declaration, so decl = 0
>
> if (decl <-- won't be checked
> && POINTER_TYPE_P (TREE_TYPE (decl))
> && TYPE_RESTRICT (TREE_TYPE (decl)))
>
>
> The TREE_OPERAND (inner, 0) is:
>
> <nop_expr 0xf7fc7400
> type <pointer_type 0xf7fa6870
> type <integer_type 0xf7f122f4 int sizes-gimplified public SI
> size <integer_cst 0xf7f0f9d8 constant 32>
> unit size <integer_cst 0xf7f0f7c4 constant 4>
> align 32 symtab 0 alias set 2 canonical type 0xf7f122f4 precision
> 32 min <integer_cst 0xf7f0f984 -2147483648> max <integer_cst 0xf7f0f9a0
> 2147483647>
> pointer_to_this <pointer_type 0xf7f18798>>
> sizes-gimplified public unsigned restrict SI size <integer_cst
> 0xf7f0f9d8 32> unit size <integer_cst 0xf7f0f7c4 4>
> align 32 symtab 0 alias set -1 canonical type 0xf7fa6870>
>
> arg 0 <plus_expr 0xf7fc95e8
> type <integer_type 0xf7f12438 long unsigned int public unsigned SI
> size <integer_cst 0xf7f0f9d8 32> unit size <integer_cst 0xf7f0f7c4 4>
> align 32 symtab 0 alias set -1 canonical type 0xf7f12438 precision
> 32 min <integer_cst 0xf7f0fa64 0> max <integer_cst 0xf7f0fa48 4294967295>>
>
> arg 0 <var_decl 0xf7fc4a6c D.1768 type <integer_type 0xf7f12438 long
> unsigned int>
> used unsigned ignored SI file tst.c line 1 col 6 size <integer_cst
> 0xf7f0f9d8 32> unit size <integer_cst 0xf7f0f7c4 4>
> align 32 context <function_decl 0xf7fa7080 foo>
> (reg:SI 104 [ D.1768 ])>
> arg 1 <integer_cst 0xf7fb7bec constant 4>
> tst.c:7:5>
> tst.c:7:5>
>
>
> I added the following code. It seems to work for my example and others. Not
> sure potential hazard with it.
> ...
> else if(!decl
> && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND(inner, 0)))
> && TYPE_RESTRICT (TREE_TYPE (TREE_OPERAND(inner, 0))))
> {
> return new_alias_set ();
> }
> ....
>
Ah, of course. As I said - restrict support is broken.
Richard.
