[Bug optimization/11054] New: [3.3 regression] [m68k] ICE in reg_overlap_mentioned_p

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11054

           Summary: [3.3 regression] [m68k] ICE in reg_overlap_mentioned_p
           Product: gcc
           Version: 3.3
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: debian-gcc@lists.debian.org
                CC: gcc-bugs@gcc.gnu.org
  GCC host triplet: m68k-linux

[forwarded from http://bugs.debian.org/194749]

works with 3.2.3 and HEAD 20030531.

gcc-3.3 fails to build sane-backends 1.0.12-1 on m68k with the
following internal error :

gcc -c -g -O2 -W -Wall -DHAVE_CONFIG_H -I. -I. -I../include -I../include
-DPATH_SANE_CONFIG_DIR=/etc/sane.d -DPATH_SANE_DATA_DIR=/usr/share -DV_MAJOR=1
-DV_MINOR=0 -DBACKEND_NAME=dc25 -DLIBDIR=/usr/lib/sane dc25.c -o dc25.o
dc25.c:213: warning: dereferencing type-punned pointer will break
strict-aliasing rules
dc25.c:310: warning: dereferencing type-punned pointer will break
strict-aliasing rules
dc25.c:323: warning: dereferencing type-punned pointer will break
strict-aliasing rules
dc25.c: In function `get_info':
dc25.c:616: internal compiler error: in reg_overlap_mentioned_p, at rtlanal.c:1543

Building with -O1 or with gcc-3.2 (3.2.3-2) works fine. The same file
compiled with -fPIC gives no error.



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