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c++/671: Internal compiler error building bzflag with -O2 on



>Number:         671
>Category:       c++
>Synopsis:       Internal compiler error building bzflag with -O2 on
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 22 20:06:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     John Gilbert, jgilbert@sgi.com
>Release:        gcc version 2.96 20000731 (Red Hat Linux 7.0)
>Organization:
>Environment:
stock redhat 7.0 full install, amd k6-2 550 on a P5A 128meg
>Description:
Building BZFlag 1.7d9 from bzflag.linuxgames.com 
with only return value type fixes returns the following
about 90% through the makefile.
make[3]: Entering directory `/opt/bzflag-1.7d/src/bzflag'
/usr/bin/g++    -D_BSD_SOURCE -D_POSIX_SOURCE -DHALF_RATE_AUDIO -DXF86VIDMODE_EX
T -I/usr/include -I/usr/X11R6/include -Wall -W -fno-exceptions  -DVERSION=107040
09   -DROBOT -DINSTALL_DATA_DIR=\"/usr/X11R6/lib/X11/bzflag/data\"  -I../../incl
ude  -DNDEBUG -O2   -c BackgroundRenderer.cxx
BackgroundRenderer.cxx: In method `void 
BackgroundRenderer::drawGroundGrid (SceneRenderer &)':
BackgroundRenderer.cxx:693: Unable to generate reloads for:
(insn 94 91 95 (set (reg:SF 8 st(0))
        (float_truncate:SF (reg/v:XF 8 st(0)))) 91 {*truncxfsf2_2} (insn_list 82
 (nil))
    (expr_list:REG_DEAD (reg/v:XF 8 st(0))
        (nil)))
BackgroundRenderer.cxx:693: Internal compiler error in find_reloads, at 
reload.c:3493
Please submit a full bug report.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
make[3]: *** [BackgroundRenderer.o] Error 1

I would be happy to send my build script that makes
all the modifications to the makefiles, etc. so that
it compiles better on 7.0. I had same problem with
the full default bzflag optimization flags as well, I turned
off all but O2.
It compiles fine with the full optimizations with 2.91.66
on redhat 6.2.
>How-To-Repeat:
install redhat 7, bzflag 1.7d9 from above address
and build with
make linux
make
I would be happy to help by sending scripts, install
new compiler packages, etc.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:

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