[Bug target/51236] New: ICE: in copy_to_mode_reg, at explow.c:641 with -O -ftree-vectorize -mavx2

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51236

             Bug #: 51236
           Summary: ICE: in copy_to_mode_reg, at explow.c:641 with -O
                    -ftree-vectorize -mavx2
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25866
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25866
reduced testcase

Compiler output:
$ gcc -O -ftree-vectorize -mavx2 testcase.c 
testcase.c: In function 'foo':
testcase.c:5:11: internal compiler error: in copy_to_mode_reg, at explow.c:641
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

(gdb) bt
#0  internal_error (gmsgid=0x14c64a0 "in %s, at %s:%d") at
/mnt/svn/gcc-trunk/gcc/diagnostic.c:839
#1  0x00000000011c4674 in fancy_abort (file=Unhandled dwarf expression opcode
0xf3
) at /mnt/svn/gcc-trunk/gcc/diagnostic.c:899
#2  0x00000000007324ec in copy_to_mode_reg (mode=V4DFmode, x=0x7ffff5583c30) at
/mnt/svn/gcc-trunk/gcc/explow.c:641
#3  0x0000000000c4dc2e in ix86_expand_builtin (exp=Unhandled dwarf expression
opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/config/i386/i386.c:29982
#4  0x000000000063c070 in expand_builtin (exp=0x7ffff56e53c0,
target=0x7ffff577b260, subtarget=0x0, mode=V4DImode, ignore=0)
    at /mnt/svn/gcc-trunk/gcc/builtins.c:5803
#5  0x000000000074a94e in expand_expr_real_1 (exp=0x7ffff56e53c0,
target=0x7ffff577b260, tmode=V4DImode, modifier=EXPAND_NORMAL, 
    alt_rtl=0x7fffffffd458) at /mnt/svn/gcc-trunk/gcc/expr.c:9915
#6  0x000000000074ff64 in expand_expr_real (exp=0x7ffff56e53c0,
target=Unhandled dwarf expression opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/expr.c:7733
#7  0x0000000000759cac in store_expr (exp=0x7ffff56e53c0,
target=0x7ffff577b260, call_param_p=Unhandled dwarf expression opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/expr.c:5163
#8  0x00000000007601bd in expand_assignment (to=0x7ffff5771730,
from=0x7ffff56e53c0, nontemporal=false) at /mnt/svn/gcc-trunk/gcc/expr.c:4948
#9  0x000000000066a405 in expand_call_stmt (stmt=0x7ffff576f498) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:2075
#10 expand_gimple_stmt_1 (stmt=0x7ffff576f498) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:2116
#11 expand_gimple_stmt (stmt=0x7ffff576f498) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:2268
#12 0x000000000066bf71 in expand_gimple_basic_block (bb=0x7ffff56dc208) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:4015
#13 0x000000000066e026 in gimple_expand_cfg () at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:4523
#14 0x00000000008df685 in execute_one_pass (pass=0x17cb200) at
/mnt/svn/gcc-trunk/gcc/passes.c:2074
#15 0x00000000008dfa25 in execute_pass_list (pass=0x17cb200) at
/mnt/svn/gcc-trunk/gcc/passes.c:2129
#16 0x0000000000a4169e in tree_rest_of_compilation (fndecl=0x7ffff56de800) at
/mnt/svn/gcc-trunk/gcc/tree-optimize.c:420
#17 0x0000000000694d1a in cgraph_expand_function (node=0x7ffff55886c0) at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1819
#18 0x0000000000696abc in cgraph_expand_all_functions () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1886
#19 cgraph_optimize () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2199
#20 0x000000000069722a in cgraph_finalize_compilation_unit () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1327
#21 0x0000000000574ee0 in c_write_global_declarations () at
/mnt/svn/gcc-trunk/gcc/c-decl.c:10023
#22 0x00000000009d4924 in compile_file (argc=15, argv=0x7fffffffda98) at
/mnt/svn/gcc-trunk/gcc/toplev.c:581
#23 do_compile (argc=15, argv=0x7fffffffda98) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1931
#24 toplev_main (argc=15, argv=0x7fffffffda98) at
/mnt/svn/gcc-trunk/gcc/toplev.c:2007
#25 0x00007ffff6178d2d in __libc_start_main () from /lib64/libc.so.6
#26 0x0000000000558799 in _start ()

Tested revisions:
r181508 - crash
r181442 - crash
r180540 - OK
r178498 - OK