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Date: Mon, 20 May 2002 02:56:00 -0000
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From: Glen Nakamura <glen@imodulo.com>
Subject: Re: optimization/6703: optimized memset fills incorrect number of
 bytes for void** parameter
Reply-To: Glen Nakamura <glen@imodulo.com>
X-SW-Source: 2002-05/txt/msg00585.txt.bz2
List-Id: <gcc-prs.sourceware.org>

The following reply was made to PR optimization/6703; it has been noted by GNATS.

From: Glen Nakamura <glen@imodulo.com>
To: gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	dbaron@fas.harvard.edu, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: optimization/6703: optimized memset fills incorrect number of
 bytes for void** parameter
Date: Sun, 19 May 2002 23:48:23 -1000

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6703
 This patch extracted from cvs diff -r 1.386 -r 1.387 seems to fix the problem:
 
 ChangeLog
 ===================================================================
 Tue Apr 23 14:24:25 CEST 2002  Jan Hubicka  <jh@suse.cz>
 
 	* i386.c (ix86_expand_clrstr): Fix typo.
 
 Index: i386.c
 ===================================================================
 RCS file: /cvsroot/gcc/gcc/gcc/config/i386/i386.c,v
 retrieving revision 1.368.2.9
 diff -c -3 -p -r1.368.2.9 i386.c
 *** i386.c	23 Apr 2002 08:11:22 -0000	1.368.2.9
 --- i386.c	20 May 2002 09:30:28 -0000
 *************** ix86_expand_clrstr (src, count_exp, alig
 *** 9420,9426 ****
    		 
 	 gen_rtx_SUBREG (SImode, zeroreg, 0)));
          if (TARGET_64BIT && (align <= 4 || count == 0))
    	{
 ! 	  rtx label = ix86_expand_aligntest (destreg, 2);
    	  emit_insn (gen_strsetsi (destreg,
    		 
 	   gen_rtx_SUBREG (SImode, zeroreg, 0)));
    	  emit_label (label);
 --- 9420,9426 ----
    		 
 	 gen_rtx_SUBREG (SImode, zeroreg, 0)));
          if (TARGET_64BIT && (align <= 4 || count == 0))
    	{
 ! 	  rtx label = ix86_expand_aligntest (countreg, 2);
    	  emit_insn (gen_strsetsi (destreg,
    		 
 	   gen_rtx_SUBREG (SImode, zeroreg, 0)));
    	  emit_label (label);
 *************** ix86_expand_clrstr (src, count_exp, alig
 *** 9431,9437 ****
    		 
 	 gen_rtx_SUBREG (HImode, zeroreg, 0)));
          if (align <= 2 || count == 0)
    	{
 ! 	  rtx label = ix86_expand_aligntest (destreg, 2);
    	  emit_insn (gen_strsethi (destreg,
    		 
 	   gen_rtx_SUBREG (HImode, zeroreg, 0)));
    	  emit_label (label);
 --- 9431,9437 ----
    		 
 	 gen_rtx_SUBREG (HImode, zeroreg, 0)));
          if (align <= 2 || count == 0)
    	{
 ! 	  rtx label = ix86_expand_aligntest (countreg, 2);
    	  emit_insn (gen_strsethi (destreg,
    		 
 	   gen_rtx_SUBREG (HImode, zeroreg, 0)));
    	  emit_label (label);
 *************** ix86_expand_clrstr (src, count_exp, alig
 *** 9442,9448 ****
    		 
 	 gen_rtx_SUBREG (QImode, zeroreg, 0)));
          if (align <= 1 || count == 0)
    	{
 ! 	  rtx label = ix86_expand_aligntest (destreg, 1);
    	  emit_insn (gen_strsetqi (destreg,
    		 
 	   gen_rtx_SUBREG (QImode, zeroreg, 0)));
    	  emit_label (label);
 --- 9442,9448 ----
    		 
 	 gen_rtx_SUBREG (QImode, zeroreg, 0)));
          if (align <= 1 || count == 0)
    	{
 ! 	  rtx label = ix86_expand_aligntest (countreg, 1);
    	  emit_insn (gen_strsetqi (destreg,
    		 
 	   gen_rtx_SUBREG (QImode, zeroreg, 0)));
    	  emit_label (label);