[Bug c/28936] New: -O3 crash

[dcb314 at hotmail dot com]

I just tried to compile Suse Linux package ctags-2006.5.31-3
with GNU C++ version 4.2 snapshot 20060826.

The compiler said

ruby.c: In function 'parseIdentifier':
ruby.c:227: error: edge from 49 to 51 should not be marked irreducible
ruby.c:227: error: basic block 51 should not be marked irreducible
ruby.c:227: error: edge from 51 to 37 should not be marked irreducible
ruby.c:227: internal compiler error: in verify_loop_structure, at
cfgloop.c:1268
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Preprocessed source code attached. Flag -O3 required.


-- 
           Summary: -O3 crash
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dcb314 at hotmail dot com
  GCC host triplet: i686-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28936