[Bug bootstrap/48332] New: optabs changes (PR48263 fix) broke m68k-linux bootstrap

[Bug bootstrap/48332] New: optabs changes (PR48263 fix) broke m68k-linux bootstrap

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48332

           Summary: optabs changes (PR48263 fix) broke m68k-linux
                    bootstrap
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikpe@it.uu.se


Current gcc-4.7 fails to build for m68k-linux due to an ICE while stage1 gcc
builds libgcc:

/tmp/gcc-4.7-r171418/libgcc/../gcc/libgcc2.c: In function '__mulvsi3':
/tmp/gcc-4.7-r171418/libgcc/../gcc/libgcc2.c:157:18: internal compiler error:
in maybe_legitimize_operand, at optabs.c:7034
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** [_mulvsi3.o] Error 1
make[2]: Leaving directory `/tmp/objdir2/m68k-unknown-linux/libgcc'
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory `/tmp/objdir2'
make: *** [all] Error 2

Bisection identified r171418 as the cause of the ICE:

Author: rsandifo
Date: Thu Mar 24 17:23:18 2011
New Revision: 171418

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171418
Log:
gcc/
    PR rtl-optimization/48263
    * optabs.c (expand_binop_directly): Reinstate convert_modes code
    and original commutative_p handling.  Use maybe_gen_insn.

Configuration:
/tmp/gcc-4.7-r171418/configure --target=m68k-unknown-linux
--prefix=/home/mikpe/pkgs/linux-x86/cross-m68k
--with-gmp=/home/mikpe/pkgs/linux-x86/gmp-4.3.2
--with-mpfr=/home/mikpe/pkgs/linux-x86/mpfr-2.4.2
--with-mpc=/home/mikpe/pkgs/linux-x86/mpc-0.8.2 --disable-plugin --disable-lto
--disable-nls --disable-shared --disable-libmudflap --disable-multilib
--enable-threads=posix --enable-checking=release --enable-languages=c

[Bug bootstrap/48332] optabs changes (PR48263 fix) broke m68k-linux bootstrap

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48332

--- Comment #1 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2011-03-29 12:47:23 UTC ---
Please attach a preprocessed file.

[Bug bootstrap/48332] optabs changes (PR48263 fix) broke m68k-linux bootstrap

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48332

--- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2011-03-29 13:01:13 UTC ---
Created attachment 23799
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23799
preprocessed and reduced test case

[Bug bootstrap/48332] optabs changes (PR48263 fix) broke m68k-linux bootstrap

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48332

--- Comment #3 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2011-03-30 15:36:49 UTC ---
Author: rsandifo
Date: Wed Mar 30 15:36:45 2011
New Revision: 171733

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=171733
Log:
gcc/
    PR rtl-optimization/48332
    * optabs.c (expand_binop_directly): Set xmodeN to the target-mandated
    mode of input operand N and modeN to its actual mode.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/optabs.c

[Bug bootstrap/48332] optabs changes (PR48263 fix) broke m68k-linux bootstrap

[rsandifo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48332

rsandifo@gcc.gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> 2011-03-30 19:42:23 UTC ---
Fixed on trunk.