[Bug rtl-optimization/47489] New: ICE in print_pattern, at sched-vis.c:602 (affecting mips, with slim RTL dumps)

[m...@joachim-breitner.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47489

           Summary: ICE in print_pattern, at sched-vis.c:602 (affecting
                    mips, with slim RTL dumps)
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: m...@joachim-breitner.de


Hi,

I have hit a ICE and could reduce it to the following minimal example:

$ cat bug-demo.c
int func() {
    return 0;
}

$ build-mips/gcc/cc1 -O1 -fdump-rtl-mach-slim  bug-demo.c 
 func
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> <visibility> <early_local_cleanups> <emutls> <whole-program>
<ipa-profile> <inline> <pure-const> <static-var>Assembling functions:
 func
bug-demo.c: In function ‘func’:
bug-demo.c:3:1: internal compiler error: in print_pattern, at sched-vis.c:602
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

It does not happen with -fdump-rtl-mach, i.e. without slim.

I could not reproduce it by passing individual "-f..." flags instead of -O2,
even though the output of "--help", which mentions which flags are
enabled/disabled, is identical.

This is gcc-4.6 snapshot 20101225, configured using the command line:
../gcc-4.6-20101225/configure --prefix=$PWD/../install  --disable-bootstrap
--disable-multilib --enable-stage1-languages=c
--disable-lib{gcj,ada,ssp,mudflap,gomp} --enable-languages=c
--target=mips-linux


Thanks,
Joachim