[Bug middle-end/46966] New: [4.6 Regression] ICE: in execute_cse_reciprocals, at tree-ssa-math-opts.c:474 with -floop-interchange -fno-tree-copy-prop -fno-tree-loop-im

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46966

           Summary: [4.6 Regression] ICE: in execute_cse_reciprocals, at
                    tree-ssa-math-opts.c:474 with -floop-interchange
                    -fno-tree-copy-prop -fno-tree-loop-im
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: spop@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 22770
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22770
reduced testcase (from graphite/interchange-0.c)

Compiler output:
$ gcc -O -floop-interchange -ffast-math -fno-tree-copy-prop -fno-tree-loop-im
pr46966.c  
pr46966.c: In function 'foo':
pr46966.c:3:6: internal compiler error: in execute_cse_reciprocals, at
tree-ssa-math-opts.c:474
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

(gdb) bt
#0  fancy_abort (file=0x117cbd0 "/mnt/svn/gcc-trunk/gcc/tree-ssa-math-opts.c",
line=474, 
    function=0x117cc70 "execute_cse_reciprocals") at
/mnt/svn/gcc-trunk/gcc/diagnostic.c:892
#1  0x00000000009b6e3e in execute_cse_reciprocals () at
/mnt/svn/gcc-trunk/gcc/tree-ssa-math-opts.c:474
#2  0x00000000007ecabf in execute_one_pass (pass=0x1635d20) at
/mnt/svn/gcc-trunk/gcc/passes.c:1553
#3  0x00000000007ecd85 in execute_pass_list (pass=0x1635d20) at
/mnt/svn/gcc-trunk/gcc/passes.c:1608
#4  0x00000000007ecd97 in execute_pass_list (pass=0x1634d60) at
/mnt/svn/gcc-trunk/gcc/passes.c:1609
#5  0x000000000092da36 in tree_rest_of_compilation (fndecl=0x7ffff5cc4f00) at
/mnt/svn/gcc-trunk/gcc/tree-optimize.c:422
#6  0x0000000000af32e2 in cgraph_expand_function (node=0x7ffff5ce4000) at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1508
#7  0x0000000000af58ba in cgraph_expand_all_functions () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1567
#8  cgraph_optimize () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1827
#9  0x0000000000af5e3a in cgraph_finalize_compilation_unit () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1031
#10 0x0000000000508e0c in c_write_global_declarations () at
/mnt/svn/gcc-trunk/gcc/c-decl.c:9845
#11 0x00000000008d7206 in compile_file (argc=17, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:591
#12 do_compile (argc=17, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1874
#13 toplev_main (argc=17, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1937
#14 0x00007ffff6586bbd in __libc_start_main () from /lib/libc.so.6
#15 0x00000000004ef7f5 in _start ()

Tested revisions:
r167809 - crash
r167723 - crash
r165699 - OK
4.5 r166509 - OK