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Date: Thu, 28 May 2015 19:05:00 -0000
Message-ID: <CAMe9rOrCh++A=jLOcDVXGM+UOyn31kuJ+R5ZmZkw8E_eHmCTHQ@mail.gmail.com>
Subject: Re: [RFC][PATCH][X86_64] Eliminate PLT stubs for specified external functions via -fno-plt=
From: "H.J. Lu" <hjl.tools@gmail.com>
To: Sriraman Tallam <tmsriram@google.com>
Cc: Pedro Alves <palves@redhat.com>, Michael Matz <matz@suse.de>, David Li <davidxl@google.com>, 	GCC Patches <gcc-patches@gcc.gnu.org>, Jan Hubicka <hubicka@ucw.cz>
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On Thu, May 28, 2015 at 11:34 AM, Sriraman Tallam <tmsriram@google.com> wrote:
> I have attached a patch that adds the new attribute "noplt".  Please review.
>
> * config/i386/i386.c (avoid_plt_to_call): New function.
> (ix86_output_call_insn): Generate indirect call for functions
> marked with "noplt" attribute.
> (attribute_spec ix86_attribute_): Define new attribute "noplt".
> * doc/extend.texi: Document new attribute "noplt".
> * gcc.target/i386/noplt-1.c: New testcase.
> * gcc.target/i386/noplt-2.c: New testcase.
>

2 comments:

1. Don't remove "%!" prefix before call/jmp.  It is needed for MPX.
2. Don't you need to check

      && !TARGET_MACHO
      && !TARGET_SEH
      && !TARGET_PECOFF

since it only works for ELF.

-- 
H.J.