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* Re: optimization/190: Optimization bug for x86 target
@ 2002-04-02 0:42 rth
0 siblings, 0 replies; 2+ messages in thread
From: rth @ 2002-04-02 0:42 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, martin, micksa, nobody, rodrigc, rth
Synopsis: Optimization bug for x86 target
Responsible-Changed-From-To: unassigned->rth
Responsible-Changed-By: rth
Responsible-Changed-When: Tue Apr 2 00:42:31 2002
Responsible-Changed-Why:
.
State-Changed-From-To: analyzed->closed
State-Changed-By: rth
State-Changed-When: Tue Apr 2 00:42:31 2002
State-Changed-Why:
http://gcc.gnu.org/ml/gcc-patches/2002-04/msg00038.html
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=190
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: optimization/190: Optimization bug for x86 target
@ 2002-01-12 17:26 Craig Rodrigues
0 siblings, 0 replies; 2+ messages in thread
From: Craig Rodrigues @ 2002-01-12 17:26 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR optimization/190; it has been noted by GNATS.
From: Craig Rodrigues <rodrigc@mediaone.net>
To: martin@loewis.home.cs.tu-berlin.de, gcc-gnats@gcc.gnu.org,
gcc-prs@gcc.gnu.org, micksa@knobbits.org, rodrigc@gcc.gnu.org,
gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org, rth@redhat.com
Cc:
Subject: Re: optimization/190: Optimization bug for x86 target
Date: Sat, 12 Jan 2002 20:21:50 -0500
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=190
I've reduced the testcase and attached it to this PR:
#include <stdint.h>
uint32_t Ycolor[256];
void foo ()
{
uint8_t y22;
__asm__ __volatile__ ("movd" " %0, %%" "mm3" : : "X" ( Ycolor[y22]
)) ;
}
If y22 is left uninitialized, the compiler will ICE if -O is specified.
The workarounds are:
(1) initialize y22 to some value
(2) Change "X" to "m" as rth previously mentioned in a followup to
this PR.
--
Craig Rodrigues
http://www.gis.net/~craigr
rodrigc@mediaone.net
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