From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25853 invoked by alias); 21 Dec 2002 17:46:05 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 25712 invoked by uid 71); 21 Dec 2002 17:46:03 -0000 Date: Sat, 21 Dec 2002 09:46:00 -0000 Message-ID: <20021221174603.25701.qmail@sources.redhat.com> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, From: "Mack Lobell" Subject: Re: c/8962: "-O2 -mmmx" makes gcc seg fault Reply-To: "Mack Lobell" X-SW-Source: 2002-12/txt/msg01192.txt.bz2 List-Id: The following reply was made to PR c/8962; it has been noted by GNATS. From: "Mack Lobell" To: bangerth@ticam.utexas.edu Cc: gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: c/8962: "-O2 -mmmx" makes gcc seg fault Date: Sat, 21 Dec 2002 17:44:38 +0000 Ok, more tests: downloaded 3.3 branch and 3.4 current. Results: ***** Build with 3.3 branch ***** $ ~/build/gcc3.3/gcc/xgcc.exe -B ~/build/gcc3.3/gcc -c -O2 -mmmx expr.i /home/lobell/src/gcc-20021202/gcc/expr.c: In function `expand_expr': /home/lobell/src/gcc-20021202/gcc/expr.c:9306: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See for instructions. lobell@VOLVO ~/gcc_test $ ~/build/gcc3.3/gcc/xgcc.exe -B ~/build/gcc3.3/gcc -v Reading specs from /home/lobell/build/gcc3.3/gcc/specs Configured with: /home/lobell/src/gcc3.3/gcc/configure --enable-languages=c --disable-nls Thread model: single gcc version 3.3 20021221 (prerelease) ***** Build with 3.4 current ***** lobell@VOLVO ~/gcc_test $ ll total 873 drwxrwxrwx+ 2 lobell None 0 Dec 21 18:40 . drwxrwxrwx+ 8 lobell None 0 Dec 21 17:54 .. -rw-rw-rw- 1 lobell None 893508 Dec 16 15:32 expr.i lobell@VOLVO ~/gcc_test $ ~/build/gcc_current1/gcc/xgcc.exe -B ~/build/gcc_current1/gcc -c -O2 -mmmx expr.i lobell@VOLVO ~/gcc_test $ ll total 1099 drwxrwxrwx+ 2 lobell None 0 Dec 21 18:41 . drwxrwxrwx+ 8 lobell None 0 Dec 21 17:54 .. -rw-rw-rw- 1 lobell None 893508 Dec 16 15:32 expr.i -rw-rw-rw- 1 lobell None 231308 Dec 21 18:41 expr.o lobell@VOLVO ~/gcc_test $ ~/build/gcc_current1/gcc/xgcc.exe -B ~/build/gcc_current1/gcc -v Reading specs from /home/lobell/build/gcc_current1/gcc/specs Configured with: Thread model: single gcc version 3.4 20021221 (experimental) Conclusion: The bug exists only in 3.3 branch. Does that help? Regards. >From: Wolfgang Bangerth >To: Mack Lobell >CC: gcc-bugs@gcc.gnu.org, >Subject: Re: c/8962: "-O2 -mmmx" makes gcc seg fault >Date: Sat, 21 Dec 2002 10:55:13 -0600 (CST) > > > > did the following: > >Thanks for your experiments. I think there is no need for you to try an >even newer snapshot. The only thing you could do is try to strip down the >testcase as much as possible, presently it is rather long. We usually do >that by first stripping off the line number lines using > perl -pi -e 's/^#.*\n//g;' expr.i >so that the compiler gives the _actual_ line number in this file when it >crashes. Then try to delete as much stuff from the file as you can. >Usually, one can get it down to 20-30 lines and still see the crash. But >be warned that this can be a tediuous process that could take 30 minutes >to an hour, if you're not frequently doing such things. > >Thanks for your help > Wolfgang > >------------------------------------------------------------------------- >Wolfgang Bangerth email: bangerth@ticam.utexas.edu > www: http://www.ticam.utexas.edu/~bangerth _________________________________________________________________ The new MSN 8: smart spam protection and 3 months FREE*. http://join.msn.com/?page=features/junkmail&xAPID=42&PS=47575&PI=7324&DI=7474&SU= http://www.hotmail.msn.com/cgi-bin/getmsg&HL=1216hotmailtaglines_smartspamprotection_3mf