Fairly standard fortran77 code. Some unused variable problems, but I tried commenting those out and still get the ICE. The ICE happens to occur on a line with just a single 'return' instruction, near the very end of the file; the only thing following return is the last line, 'end'. I have tried both gcc-3.4.3 and gcc-3.4.4 as installed by gentoo, as noted in the summary. They were compiled with similar USE flags; gcc -v gives: Reading specs from /usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/specs Configured with: /usr/ptmp/portage/gcc-3.4.4/work/gcc-3.4.4/configure --enable-version-specific-runtime-libs --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/3.4.4 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.4 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.4/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.4/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/include/g++-v3 --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec --disable-nls --with-system-zlib --disable-checking --disable-werror --disable-libunwind-exceptions --enable-multilib --disable-libgcj --enable-languages=c,c++,f77 --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu Thread model: posix gcc version 3.4.4 (Gentoo 3.4.4, HTB-3.4.4-1.00, ssp-3.4.4-1.0, pie-8.7.8) I did not 'diff' the "unrecognizable insn" message output between 3.4.3 and 3.4.4, but they appear to be the same. I could verify this easily if asked; I have both compilers installed and can switch between them with ease. GCC4 looks too complicated to get setup on this machine. If there are other compiler revisions you would like me to try just ask. Its been a little while since I've built this system, but I think it came from a stage1 install, if that matters. Reproducible: Always Steps to Reproduce: Run: /bin/sh ../../libtool --mode=compile g77 -Wall -I../include/ -pedantic-errors -g -O2 -c -o readmajorcube.lo `test -f 'readmajorcube.f' || echo './'`readmajorcube.f g77 -Wall -I../include/ -pedantic-errors -g -O2 -c readmajorcube.f -fPIC -o .libs/readmajorcube.o Actual Results: /bin/sh ../../libtool --mode=compile g77 -Wall -I../include/ -pedantic-errors -g -O2 -c -o readmajorcube.lo `test -f 'readmajorcube.f' || echo './'`readmajorcube.f g77 -Wall -I../include/ -pedantic-errors -g -O2 -c readmajorcube.f -fPIC -o .libs/readmajorcube.o readmajorcube.f: In subroutine `readmajorcube': In file included from readmajorcube.f:17: readmajorcube.f:54: warning: unused variable 'z' readmajorcube.f:54: warning: unused variable 'y' readmajorcube.f:54: warning: unused variable 'x' readmajorcube.f:53: warning: unused variable 'range_delta__' readmajorcube.f:52: warning: unused variable 'range' readmajorcube.f:47: warning: unused variable 'range_total__' readmajorcube.f:46: warning: unused variable 'coorsys' readmajorcube.f:44: warning: unused variable 'sltype' readmajorcube.f:43: warning: unused variable 'fltype' readmajorcube.f:37: warning: unused variable 'typecount' readmajorcube.f:22: warning: unused variable 'question' readmajorcube.f:21: warning: unused variable 'ans' readmajorcube.f:17: warning: unused variable 'firstpass' readmajorcube.f:176: error: unrecognizable insn: (insn:HI 2741 2740 564 2 (set (reg/f:DI 826) (plus:DI (symbol_ref:DI ("array.0") [flags 0x2] <var_decl 0x2aaaaae3e1a0 array>) (reg:DI 827))) -1 (insn_list 2740 (nil)) (expr_list:REG_DEAD (reg:DI 827) (expr_list:REG_EQUAL (const:DI (plus:DI (symbol_ref:DI ("array.0") [flags 0x2] <var_decl 0x2aaaaae3e1a0 array>) (const_int 16874992 [0x1017df0]))) (nil)))) readmajorcube.f:176: internal compiler error: in extract_insn, at recog.c:2083 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://bugs.gentoo.org/> for instructions. Expected Results: Compile the subroutine reporting only the warnings. Portage 2.0.51.22-r1 (default-linux/amd64/2005.0, gcc-3.4.4, glibc-2.3.4.20041102-r1, 2.6.11-gentoo-r11 x86_64) ================================================================= System uname: 2.6.11-gentoo-r11 x86_64 AMD Opteron(tm) Processor 246 Gentoo Base System version 1.6.12 dev-lang/python: 2.3.5 sys-apps/sandbox: 1.2.9 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.5 sys-devel/binutils: 2.15.92.0.2-r8, 2.15.92.0.2-r10 sys-devel/libtool: 1.5.16, 1.5.18-r1 virtual/os-headers: 2.6.8.1-r4, 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="YES" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3/share/config /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://mirrors.tds.net/gentoo http://www.ibiblio.org/pub/Linux/distributions/gentoo http://gentoo.oregonstate.edu" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/usr/ptmp" PORTDIR="/usr/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X acpi alsa amd64 atlas avi bash-completion berkdb bitmap-fonts boundschecking bzlib cdr crypt cups curl debugger dvd dvdr dvdread encode f77 flac font-server fortran gd gif gpm graphviz gtk gtk2 imagemagick imlib ipv6 java jp2 jpeg libwww lzw lzw-tiff mad mikmod mmap mng motif mozilla mp3 mpeg ncurses netcdf nocd nvidia offensive offsensive ogg oggvorbis openal opengl pam pcre perl png posix python quicktime readline sdl shared sharedmem sockets spell ssl svg tcltk tcpd tetex theora tiff truetype truetype-fonts type1-fonts usb userlocales videos vorbis wmf wxwindows xml2 xosd xpm xprint xrandr xv xvid zlib userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTDIR_OVERLAY
Quick summary: libtool has an effect, and this only occurs w/ -O2 or higher. Should have tried && included this in the original report; mea culpa. It seems libtool has something to do with the ICE. I copied the relevant file and its only include out of the build tree and tried running the following command, which is similar to what the autotools-based build system does: /home/tfogal/tmp/F77_Projects/libtool --mode=compile g77 -Wall -I../include/ -pedantic-errors -g -O2 -c -o readmajorcube.lo `test -f 'readmajorcube.f' || echo './'`readmajorcube.f This will generate the ICE. Changing "-O2" to "-O1" makes the subroutine compile fine. Also I tried compiling without libtool, as in: g77 -Wall -I../include -pedantic-errors -g -O2 -c readmajorcube.f and this does NOT produce the ICE, regardless of the level of optimization specified (or not specified).
please run: /home/tfogal/tmp/F77_Projects/libtool --debug --mode=compile g77 -Wall -I../include/ -pedantic-errors -g -O2 -c -o readmajorcube.lo readmajorcube.f >& log and then post the log as an attachment ... we'll try to narrow down the test case
Created attachment 62873 [details] log of requested libtool run (similar to before, but with --debug)
ok, the difference is that libtool appends -fPIC ... so try this and see if it causes the same error: g77 -Wall -I../include/ -pedantic-errors -g -O2 -c readmajorcube.f -fPIC -o .libs/readmajorcube.o if it does, try ripping out as much stuff from readmajorcube.f as possible and still trigger the bug
get back to us
Created attachment 66333 [details] fortran source that causes ICE.
Created attachment 66334 [details] included from readmajorcube.f
Sorry this took so long; I had forgotten about submitting this. Thankfully bugzilla emails me when someone makes a comment... It had to do with both -fPIC and optimizations at and above -O2. Lowering optimizations and/or getting rid of -fPIC solves the problem. I am sorry, but I do not have the time to track this down any more. I have been given permission to attach the source files to this bug; I don't think it mentions licensing, but permission was granted to use it for the purposes of finding and fixing gcc problems.
Please try to create a _minimal_ test case neccessary to trigger the bug. Rip out as much as you can, and make it just a single source file.
