[Bug middle-end/18420] New: ICE compiling mesa at -O2

["jgrimm2 at us dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>]

I'll add more details as they unfold, but wanted to get this posted into
bugzilla.  The autotester has been pretty flaky lately that I don't have a good
idea when this broke, but looks to have broken somewhere between Oct 29 and Nov
4.  I don't have data between those dates, but Nov 4. build did not compile
mesa.  SegFault doesn't happen at -O1.  

SegFault Building mesa. 

/opt/gcc-nightly/gcc/libexec/gcc/powerpc64-linux/4.0.0/cc1 -O2 context.c

context.c: In function gl_create_visual:
context.c:1082: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

Watching in GDB shows. 

Analyzing compilation unit
Performing intraprocedural optimizations
Assembling functions:
 free_shared_state
 init_material
 gl_create_visual

Program received signal SIGSEGV, Segmentation fault.
note_stores (x=0x403d62f0, fun=0x10325090 <forget_old_reloads_1>, data=0x0)
    at /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c:1405
1405    /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c: No such file or
directory.
        in /home/gccbuild/gcc_mline_anoncvs/gcc/gcc/rtlanal.c

-- 
           Summary: ICE compiling mesa at -O2
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jgrimm2 at us dot ibm dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18420