[Bug c/54520] New: ice in merge_latch_edges with -O3

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54520

             Bug #: 54520
           Summary: ice in merge_latch_edges with -O3
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: dcb...@hotmail.com


Created attachment 28151
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28151
C source code

I just tried to compile the package source-highlight-3.1.6-3
on gcc-4.8 trunk dated 20120905 on an AMD x86_64 box.

The compiler said

readtags.c: In function 'parseTagLine':
readtags.c:292:13: internal compiler error: in merge_latch_edges, at
cfgloop.c:678
 static void parseTagLine (tagFile *file, tagEntry *const entry)
             ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Preprocessed source code attached. Flag -O3 required.