bin/187103: clang 3.4 miscompiles nsAppRunner.cpp from firefox firefox-27.0.1, 1 in i386

[Dimitry Andric]

The following reply was made to PR bin/187103; it has been noted by GNATS.

From: Dimitry Andric <dim at FreeBSD.org>
To: bug-followup at FreeBSD.org,
 truckman at FreeBSD.org
Cc:  
Subject: Re: bin/187103: clang 3.4 miscompiles nsAppRunner.cpp from firefox firefox-27.0.1,1 in i386
Date: Fri, 28 Feb 2014 17:58:08 +0100

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 It is indeed a clang bug, which only occurs on i386, due to the
 ((regparm (3), stdcall)) attributes used for certain xpcom functions on
 that architecture.
 
 It has been reported upstream as http://llvm.org/PR19007 .  For now,
 please drop the attached patch in /usr/ports/www/firefox/files, which
 disables use of those attributes.
 
 -Dimitry
 
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 --- xpcom/base/nscore.h.orig	2014-02-12 22:29:26.000000000 +0100
 +++ xpcom/base/nscore.h	2014-02-28 17:22:25.000000000 +0100
 @@ -111,7 +111,7 @@
   *           NS_HIDDEN_(int) NS_FASTCALL func2(char *foo);
   */
  
 -#if defined(__i386__) && defined(__GNUC__) && !defined(XP_OS2)
 +#if defined(__i386__) && defined(__GNUC__) && !defined(XP_OS2) && !defined(__clang__)
  #define NS_FASTCALL __attribute__ ((regparm (3), stdcall))
  #define NS_CONSTRUCTOR_FASTCALL __attribute__ ((regparm (3), stdcall))
  #elif defined(XP_WIN) && !defined(_WIN64)
 
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