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: unassig...@gcc.gnu.org
ReportedBy: mi...@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
