[Bug target/28623] New: [4.1/4.2 regression] ICE in extract_insn, at recog.c:2077 (nrecognizable insn) [alpha]

["tbm at cyrius dot com" <gcc-bugzilla at gcc dot gnu dot org>]

We get the following ICE on alpha with 4.1 and 4.2.  gcc 4.0 works.

tbm@hulk:~$ gcc-4.1 -c -O kdegraphics-gstring.cpp
kdegraphics-gstring.cpp: In member function 'GP<GStringRep>
GStringRep::vformat(va_list) const':
kdegraphics-gstring.cpp:57: error: unrecognizable insn:
(insn 15 10 16 0 (set (reg:DI 73)
        (plus:DI (reg/v/f:DI 69 [ buffer ])
            (const_int 32768 [0x8000]))) -1 (nil)
    (nil))
kdegraphics-gstring.cpp:57: internal compiler error: in extract_insn, at
recog.c:2084
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.1/README.Bugs>.
Preprocessed source stored into /tmp/ccG6Sh3U.out file, please attach this to
your bugreport.
tbm@hulk:~$ /usr/lib/gcc-snapshot/bin/g++ -c -O kdegraphics-gstring.cpp
kdegraphics-gstring.cpp: In member function 'GP<GStringRep>
GStringRep::vformat(va_list) const':
kdegraphics-gstring.cpp:57: error: unrecognizable insn:
(insn 14 10 15 2 (set (reg:DI 73)
        (plus:DI (reg/v/f:DI 69 [ buffer ])
            (const_int 32768 [0x8000]))) -1 (nil)
    (nil))
kdegraphics-gstring.cpp:57: internal compiler error: in extract_insn, at
recog.c:2077
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
tbm@hulk:~$ gcc-4.0 -c -O kdegraphics-gstring.cpp
tbm@hulk:~$


-- 
           Summary: [4.1/4.2 regression] ICE in extract_insn, at
                    recog.c:2077 (nrecognizable insn) [alpha]
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com
  GCC host triplet: alpha-linux-gnu
GCC target triplet: alpha-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28623