[Bug c/39779] New: ICE shifting byte to the right with constant > 7FFFFFFF

[bjoern at hoehrmann dot de]

% gcc --version
gcc (Debian 4.3.3-7) 4.3.3
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

% cat gcc4-bug.c
#include <stdint.h>
int main(void) { 
  uint8_t v1 = 0;
  v1>>=0xdebecced;
}

% gcc gcc4-bug.c
gcc4-bug.c: In function 'main':
gcc4-bug.c:5: warning: right shift count >= width of type
gcc4-bug.c:6: error: unrecognizable insn:
(insn 7 6 8 3 gcc4-bug.c:5 (set (reg:QI 60)
        (const_int -557921043 [0xffffffffdebecced])) -1 (nil))
gcc4-bug.c:6: internal compiler error: in extract_insn, at recog.c:2001
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.3/README.Bugs> for instructions.


-- 
           Summary: ICE shifting byte to the right with constant > 7FFFFFFF
           Product: gcc
           Version: 4.3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bjoern at hoehrmann dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39779