Re: sched-deps speedup

[Jeffrey A Law <law at redhat dot com>]

  In message <Pine.LNX.4.21.0101101602430.3127-100000@dystopia.lab43.org>you wr
ite:
  > 
  > On Tue, 9 Jan 2001, Richard Henderson wrote:
  > [...]
  > > Bootstrapped on alphaev6-linux, i686-linux, sparc-solaris2.5.
  > > 
  > >         * sched-int.h (struct deps): Add max_reg, reg_last_in_use; merge
  > >         reg_last_uses, reg_last_sets, reg_last_clobbers into struct deps_
  > reg.
  > >         * sched-deps.c (sched_analyze_1): Update uses of struct deps.
  > >         (sched_analyze_2, sched_analyze_insn): Likewise.
  > >         (sched_analyze, init_deps): Likewise.
  > >         (free_deps): Likewise.  Iterate with EXECUTE_IF_SET_IN_REG_SET.
  > >         * sched-rgn.c (propagate_deps): Likewise.  Remove max_reg argumen
  > t.
  > >         (compute_block_backward_dependences): Update propagate_deps call.
  > 
  > Hi Richard,
  > 
  > The above change appears to have broken native armv3l-unknown-linux-gnu
  > builds.  Reverting only the above changes allows the bootstrap to continue
  > past the failure below.
  > 
  > I'm getting an ICE in: sched_analyze_2, at sched-deps.c:793
  > 
  > I can send the .i file as well if needed (although it is around 900k
  > uncompressed, so maybe not to the list), let me know.
Maybe so, but if you're getting an abort at that location, then something
deeper is wrong.

Luckily I believe I fixed this bug last night.

jeff
  > 
  > Thanks
  > -Rms
  > 
  > [build@feynman gcc]$ stage1/xgcc -Bstage1/
  > -B/usr/local/armv3l-unknown-linux-gnu/bin/ -c  -DIN_GCC    -g -O2 -W -Wall
  > -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes   -DHAVE_CONFIG_H
  > -I. -If -I/home/build-rpm/BUILD/gcc/gcc -I/home/build-rpm/BUILD/gcc/gcc/f
  > -I/home/build-rpm/BUILD/gcc/gcc/config
  > -I/home/build-rpm/BUILD/gcc/gcc/../include
  > /home/build-rpm/BUILD/gcc/gcc/f/com.c -o f/com.o -v --save-temps
  > Reading specs from stage1/specs
  > Configured with: /home/build-rpm/BUILD/gcc/configure --enable-debug
  > --prefix=/usr/local --enable-shared --enable-threads=posix --without-cvs
  > armv3l-unknown-linux-gnu
  > gcc version 2.97 20010109 (experimental)
  >  stage1/cpp0 -lang-c -v -I. -If -I/home/build-rpm/BUILD/gcc/gcc
  > -I/home/build-rpm/BUILD/gcc/gcc/f -I/home/build-rpm/BUILD/gcc/gcc/config
  > -I/home/build-rpm/BUILD/gcc/gcc/../include -iprefix
  > stage1/../lib/gcc-lib/armv3l-unknown-linux-gnu/2.97/ -isystem include
  > -isystem stage1/include -isystem
  > /usr/local/armv3l-unknown-linux-gnu/bin/include -D__GNUC__=2
  > -D__GNUC_MINOR__=97 -D__GNUC_PATCHLEVEL__=0 -Dunix -Dlinux -D__ELF__
  > -D__unix__ -D__linux__ -D__ELF__ -D__unix -D__linux -Asystem=unix
  > -Asystem=posix -Acpu=arm -Amachine=arm -D__CHAR_UNSIGNED__ -D__OPTIMIZE__
  > -D__STDC_HOSTED__=1 -g -W -Wall -Wwrite-strings -Wstrict-prototypes
  > -Wmissing-prototypes -D__ARM_ARCH_3__ -D__APCS_32__ -D__ARMEL__ -D__arm__
  > -DIN_GCC -DHAVE_CONFIG_H /home/build-rpm/BUILD/gcc/gcc/f/com.c com.i
  > GNU CPP version 2.97 20010109 (experimental) (cpplib) (ARM GNU/Linux with
  > ELF)
  > ignoring nonexistent directory "stage1/include"
  > ignoring nonexistent directory
  > "/usr/local/armv3l-unknown-linux-gnu/bin/include"
  > ignoring nonexistent directory
  > "lib/gcc-lib/armv3l-unknown-linux-gnu/2.97/include"
  > ignoring nonexistent directory "armv3l-unknown-linux-gnu/include"
  > ignoring nonexistent directory "/usr/local/include"
  > ignoring nonexistent directory
  > "/usr/local/lib/gcc-lib/armv3l-unknown-linux-gnu/2.97/include"
  > ignoring nonexistent directory
  > "/usr/local/armv3l-unknown-linux-gnu/include"
  > #include "..." search starts here:
  > #include <...> search starts here:
  >  .
  >  f
  >  /home/build-rpm/BUILD/gcc/gcc
  >  /home/build-rpm/BUILD/gcc/gcc/f
  >  /home/build-rpm/BUILD/gcc/gcc/config
  >  /home/build-rpm/BUILD/gcc/include
  >  include
  >  /usr/include
  > End of search list.
  >  stage1/cc1 -fpreprocessed com.i -quiet -dumpbase com.c -g -O2 -W -Wall
  > -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -version -o com.s
  > GNU CPP version 2.97 20010109 (experimental) (cpplib) (ARM GNU/Linux with
  > ELF)
  > GNU C version 2.97 20010109 (experimental) (armv3l-unknown-linux-gnu)
  > 	compiled by GNU C version 2.95.2 20000212 (release) [Rebel.com].
  > /home/build-rpm/BUILD/gcc/gcc/f/com.c: In function
  > `ffecom_arg_ptr_to_expr':
  > /home/build-rpm/BUILD/gcc/gcc/f/com.c:10577: Internal compiler error in
  > sched_analyze_2, at sched-deps.c:793
  > Please submit a full bug report.
  >  See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
  > [build@feynman gcc]$ 
  > 
  >