[Bug c/13230] New: ICE: Didn't find a coloring

["coyote at coyotegulch dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The attached source file, when compiled with gcc 3.4 20031126 and the command
line...

  gcc -c -std=gnu99 -O1 -fcse-follow-jumps -fgcse \
      -fexpensive-optimizations -fforce-mem -fpeephole2 \
      -fschedule-insns -fstrict-aliasing -fno-inline -fnew-ra gcc-ice2.c

...produces the following ICE...

gcc-ice2.c: In function `btree_remove':
gcc-ice2.c:142: internal compiler error: Didn't find a coloring.

Even the most minor changes to the btree_remove function stop the occurrence of
the ICE. All of the above options seem to be necessary to reproduce the ICE. I
suspect the problem is caused by an interaction between -fnew-ra and the other
options.

-- 
           Summary: ICE: Didn't find a coloring
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: coyote at coyotegulch dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux
  GCC host triplet: i686-pc-linux
GCC target triplet: i686-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13230