[Bug bootstrap/49830] New: [4.7 regression] m68k-linux bootstrap failure due to ICE in dwarf2out_notice_stack_adjust

["mikpe at it dot uu.se" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49830

           Summary: [4.7 regression] m68k-linux bootstrap failure due to
                    ICE in dwarf2out_notice_stack_adjust
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mikpe@it.uu.se


Created attachment 24819
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24819
reduced test case, ICEs with -O -g

gcc-4.7-20110723 fails to build on m68k-linux with:

/tmp/objdir/./gcc/xgcc -B/tmp/objdir/./gcc/
-B/home/mikpe/pkgs/linux-x86/cross-m68k/m68k-unknown-linux/bin/
-B/home/mikpe/pkgs/linux-x86/cross-m68k/m68k-unknown-linux/lib/ -isystem
/home/mikpe/pkgs/linux-x86/cross-m68k/m68k-unknown-linux/include -isystem
/home/mikpe/pkgs/linux-x86/cross-m68k/m68k-unknown-linux/sys-include    -g -O2
-O2  -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wwrite-strings
-Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition 
-isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -fbuilding-libgcc
-fno-stack-protector -Dinhibit_libc  -I. -I. -I../.././gcc
-I/tmp/gcc-4.7-20110723/libgcc -I/tmp/gcc-4.7-20110723/libgcc/.
-I/tmp/gcc-4.7-20110723/libgcc/../gcc -I/tmp/gcc-4.7-20110723/libgcc/../include
 -DHAVE_CC_TLS  -o _fixsfdi.o -MT _fixsfdi.o -MD -MP -MF _fixsfdi.dep
-DL_fixsfdi -c /tmp/gcc-4.7-20110723/libgcc/../gcc/libgcc2.c \
          -fvisibility=hidden -DHIDE_EXPORTS
/tmp/gcc-4.7-20110723/libgcc/../gcc/libgcc2.c: In function '__fixsfdi':
/tmp/gcc-4.7-20110723/libgcc/../gcc/libgcc2.c:1393:1: internal compiler error:
in dwarf2out_notice_stack_adjust, at dwarf2cfi.c:1012
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[2]: *** [_fixsfdi.o] Error 1
make[2]: Leaving directory `/tmp/objdir/m68k-unknown-linux/libgcc'
make[1]: *** [all-target-libgcc] Error 2
make[1]: Leaving directory `/tmp/objdir'
make: *** [all] Error 2

4.7-20110716 built fine.