[Bug rtl-optimization/49235] New: [4.7 Regression] ICE: in int_mode_for_mode, at stor-layout.c:424 with -O -fno-delete-null-pointer-checks -fno-tree-scev-cprop -ftree-vectorize -fno-vect-cost-model

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49235

           Summary: [4.7 Regression] ICE: in int_mode_for_mode, at
                    stor-layout.c:424 with -O
                    -fno-delete-null-pointer-checks -fno-tree-scev-cprop
                    -ftree-vectorize -fno-vect-cost-model
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 24398
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24398
reduced testcase (the same as gcc.c-torture/compile/pr36817.c)

Compiler output:
$ gcc -O -fno-delete-null-pointer-checks -fno-tree-scev-cprop -ftree-vectorize
-fno-vect-cost-model testcase.c 
testcase.c: In function 'foo':
testcase.c:9:10: internal compiler error: in int_mode_for_mode, at
stor-layout.c:424
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=0x11c8af0 "/mnt/svn/gcc-trunk/gcc/stor-layout.c",
line=424, function=0x11c8ee0 "int_mode_for_mode")
    at /mnt/svn/gcc-trunk/gcc/diagnostic.c:892
#1  0x0000000000939533 in int_mode_for_mode (mode=Unhandled dwarf expression
opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/stor-layout.c:424
#2  0x00000000006bdae2 in emit_move_via_integer (mode=VOIDmode,
x=0x7ffff5c345e0, y=0x7ffff7ecc470, force=0 '\000')
    at /mnt/svn/gcc-trunk/gcc/expr.c:2921
#3  0x00000000006cb8ea in emit_move_insn_1 (x=0x7ffff5c345e0, y=0x7ffff7ecc470)
at /mnt/svn/gcc-trunk/gcc/expr.c:3296
#4  0x00000000006cbc53 in emit_move_insn (x=0x7ffff5c345e0, y=0x7ffff7ecc470)
at /mnt/svn/gcc-trunk/gcc/expr.c:3359
#5  0x00000000006ad0bb in copy_to_reg (x=0x7ffff7ecc470) at
/mnt/svn/gcc-trunk/gcc/explow.c:608
#6  0x00000000006ae10f in memory_address_addr_space (mode=V4SImode,
x=0x7ffff5c36438, as=0 '\000') at /mnt/svn/gcc-trunk/gcc/explow.c:480
#7  0x00000000006c49f1 in expand_expr_real_1 (exp=0x7ffff5c319d8, target=0x0,
tmode=VOIDmode, modifier=EXPAND_WRITE, alt_rtl=0x0)
    at /mnt/svn/gcc-trunk/gcc/expr.c:8690
#8  0x00000000006d9cf8 in expand_expr (to=0x7ffff5c319d8, from=0x7ffff5c1fcd8,
nontemporal=0 '\000') at /mnt/svn/gcc-trunk/gcc/expr.h:419
#9  expand_assignment (to=0x7ffff5c319d8, from=0x7ffff5c1fcd8, nontemporal=0
'\000') at /mnt/svn/gcc-trunk/gcc/expr.c:4406
#10 expand_assignment (to=0x7ffff5c319d8, from=0x7ffff5c1fcd8, nontemporal=0
'\000') at /mnt/svn/gcc-trunk/gcc/expr.c:4106
#11 0x00000000005e6ce6 in expand_gimple_stmt_1 (stmt=0x7ffff5c37910) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:1953
#12 expand_gimple_stmt (stmt=0x7ffff5c37910) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:2050
#13 0x00000000005e86ba in expand_gimple_basic_block (bb=0x7ffff5bb41a0) at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:3633
#14 0x00000000005eec67 in gimple_expand_cfg () at
/mnt/svn/gcc-trunk/gcc/cfgexpand.c:4116
#15 0x000000000085e876 in execute_one_pass (pass=0x16adae0) at
/mnt/svn/gcc-trunk/gcc/passes.c:1876
#16 0x000000000085eb65 in execute_pass_list (pass=0x16adae0) at
/mnt/svn/gcc-trunk/gcc/passes.c:1930
#17 0x00000000009b398d in tree_rest_of_compilation (fndecl=0x7ffff5bcf000) at
/mnt/svn/gcc-trunk/gcc/tree-optimize.c:417
#18 0x0000000000614cf5 in cgraph_expand_function (node=0x7ffff5bd4000) at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1630
#19 0x000000000061697c in cgraph_expand_all_functions () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1689
#20 cgraph_optimize () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1952
#21 0x0000000000616faa in cgraph_finalize_compilation_unit () at
/mnt/svn/gcc-trunk/gcc/cgraphunit.c:1126
#22 0x00000000004fe148 in c_write_global_declarations () at
/mnt/svn/gcc-trunk/gcc/c-decl.c:9844
#23 0x0000000000948a74 in compile_file (argc=17, argv=0x7fffffffdb88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:586
#24 do_compile (argc=17, argv=0x7fffffffdb88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1923
#25 toplev_main (argc=17, argv=0x7fffffffdb88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1995
#26 0x00007ffff6477cec in __libc_start_main () from /lib64/libc.so.6
#27 0x00000000004e22ed in _start ()

Tested revisions:
r174424 - crash
4.6 r173059 - OK