GCC mainline gets an ICE compiling crafty from SPEC CPU2000 on
powerpc64-linux:
                                                                                
elm3b149% /home/janis/tools/gcc-mline-20050421/bin/gcc -m64 -O2 -ftree-vectorize
-maltivec -c crafty_bug.c
crafty_bug.c: In function ‘main’:
crafty_bug.c:31: internal compiler error: tree check: expected ssa_name, have
var_decl in ssa_mark_def_sites, at tree-into-ssa.c:3055
                                                                                
The test case, extracted from crafty's main.c, is still pretty big,
but taking out anything else made it work.  I tried it on another
system where it got a segfault instead, and some small changes caused
segfaults with the compiler which I was reducing it.
                                                                                
I first see the ICE with this patch from law but it might merely be
a latent bug, particularly since the test case is so touchy:
                                                                                
   http://gcc.gnu.org/ml/gcc-cvs/2005-04/msg00808.html

-- 
           Summary: ICE in ssa tree check compiling crafty with -ftree-
                    vectorize -maltivec
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janis at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc64-linux
  GCC host triplet: powerpc64-linux
GCC target triplet: powerpc64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21155