[Bug tree-optimization/36830] [4.4 Regression] STORAGE_ERROR raised compiling s-os_lib.adb

["dberlin at dberlin dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #10 from dberlin at gcc dot gnu dot org  2008-07-27 15:37 -------
Subject: Re:  [4.4 Regression] STORAGE_ERROR raised compiling s-os_lib.adb

No, it doesn't.
Even if the op isn't hashed, it is still compared for in
vn_reference_op_eq, so at worst the non-hashing will make it compare
more vn_reference_op's than it has to, it shouldn't affect
correctness.

On Sun, Jul 27, 2008 at 5:16 AM, ebotcazou at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
>
> ------- Comment #9 from ebotcazou at gcc dot gnu dot org  2008-07-27 09:16 -------
> This points to an immediate problem in vn_reference_op_compute_hash:
>
> /* Compute the hash for a reference operand VRO1.  */
>
> static hashval_t
> vn_reference_op_compute_hash (const vn_reference_op_t vro1)
> {
>  return iterative_hash_expr (vro1->op0, vro1->opcode)
>    + iterative_hash_expr (vro1->op1, vro1->opcode);
> }
>
> op2 is not hashed (whereas it is on the 4.3 branch).
>
>
> --
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36830
>
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-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36830