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Re: [patch] For alpha-vms, unset flag_jump_tables if flag_pic is nonzero

From: Tristan Gingold <gingold at adacore dot com>
To: Richard Henderson <rth at redhat dot com>
Cc: Steven Bosscher <stevenb dot gcc at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 3 May 2012 09:42:57 +0200
Subject: Re: [patch] For alpha-vms, unset flag_jump_tables if flag_pic is nonzero
References: <CABu31nPzd9NpUdzXPRpcrhMiu7jUTt0-m-ZrQ2Fh_tjZV3ecZQ@mail.gmail.com> <CABu31nP-bfrTfrRTAQ8-vW2V0KRUcC4G92Y_0grTMyMjZ96t+Q@mail.gmail.com> <4FA1AB03.7030306@redhat.com>

On May 2, 2012, at 11:45 PM, Richard Henderson wrote:

> On 05/02/2012 12:26 PM, Steven Bosscher wrote:
>>>         * config/alpha/vms.h (SUBTARGET_OVERRIDE_OPTIONS): For pic code,
>>>         unset flag_jump_tables.
>>>         * stmt.c (expand_case): Remove special flag_pic case conditional
>>>         on ASM_OUTPUT_ADDR_DIFF_ELT not being defined.
> 
> Ok.
> 
> I had a brief look at the vms file format.  It looks to me as if the lack
> of A_O_A_D_E is a defect in gas; it ought to be representable in the object
> file as a difference of two psect+offset addresses.

Agreed.  VMS relocations are much more expressive than standard ELF, so a difference should be supported.

Tristan.

References:
- [patch] For alpha-vms, unset flag_jump_tables if flag_pic is nonzero
  - From: Steven Bosscher
- Re: [patch] For alpha-vms, unset flag_jump_tables if flag_pic is nonzero
  - From: Steven Bosscher
- Re: [patch] For alpha-vms, unset flag_jump_tables if flag_pic is nonzero
  - From: Richard Henderson

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