Re: optimization/4579: MMX && Optimazation does not work

Re: optimization/4579: MMX && Optimazation does not work

[hubicka]

Synopsis: MMX && Optimazation does not work

State-Changed-From-To: analyzed->closed
State-Changed-By: hubicka
State-Changed-When: Thu Jun 20 08:56:24 2002
State-Changed-Why:
    Thu Jun 20 16:41:40 CEST 2002  Jan Hubicka  <jh@suse.cz>
    
            * combine.c (gen_lowpart_for_combine): Avoid calling of
            simplify_gen_subreg on VOIDmode.
    
            * combine.c (subst): Be prepared for simplify_subreg to return VOIDmode.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4579

Re: optimization/4579: MMX && Optimazation does not work

[rodrigc]

The following reply was made to PR optimization/4579; it has been noted by GNATS.

From: rodrigc@gcc.gnu.org
To: d-s-j@web.de, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org,
  gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org
Cc:  
Subject: Re: optimization/4579: MMX && Optimazation does not work
Date: 1 Dec 2001 22:15:59 -0000

 Synopsis: MMX && Optimazation does not work
 
 State-Changed-From-To: open->analyzed
 State-Changed-By: rodrigc
 State-Changed-When: Sat Dec  1 14:15:58 2001
 State-Changed-Why:
     Reproduced with gcc version 3.1 20011201 (experimental) 
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4579&database=gcc

Re: optimization/4579: MMX && Optimazation does not work

[rodrigc]

Synopsis: MMX && Optimazation does not work

State-Changed-From-To: open->analyzed
State-Changed-By: rodrigc
State-Changed-When: Sat Dec  1 14:15:58 2001
State-Changed-Why:
    Reproduced with gcc version 3.1 20011201 (experimental) 

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4579&database=gcc

optimization/4579: MMX : : Optimazation does not work

[Daniel]

>Number:         4579
>Category:       optimization
>Synopsis:       MMX && Optimazation does not work
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          ice-on-legal-code
>Submitter-Id:   net
>Arrival-Date:   Mon Oct 15 18:16:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Jungmann
>Release:        3.1 20011015 (experimental)
>Organization:
>Environment:
System: Linux daniel 2.4.12 #2 Mon Okt 15 21:31:09 CEST 2001 i686 unknown
Architecture: i686

	
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure 
>Description:
	use of MMX or 3D!Now builtins and  optimazation (-O1 .. -O6) produce an "internal compiler error in simplify_gen_subreg, at simplify-rtx.c:2638"
>How-To-Repeat:
	typedef __v2sf __attribute__ ((mode (V2SF)));
..	
	__v2sf a, b;
	long long g;
	g = 1;
	a = (__v2sf) g;
	b = a;
	b = __builtin_ia32_pfadd (a, b);
	g = (long long) b;
	if (g == 0) printf("\n");

..

>Fix:
	replace all "abort ();" with "return NULL_RTX" in function simplify_gen_subreg in file simplify-rtx.c
	line 2638
	line 2642
	line 2646 
>Release-Note:
>Audit-Trail:
>Unformatted: