[Bug c++/59633] New: [4.7/4.8/4.9 Regression] ICE with __attribute((vector_size(...))) for enum

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59633

            Bug ID: 59633
           Summary: [4.7/4.8/4.9 Regression] ICE with
                    __attribute((vector_size(...))) for enum
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: reichelt at gcc dot gnu.org

The following valid code snippet triggers an ICE since GCC 4.4.0:

==============================================================
typedef enum { e } T __attribute__((vector_size(8)));

void foo(T t) {}
==============================================================


bug.cc:3:6: internal compiler error: Segmentation fault
 void foo(T t) {}
      ^
0xb75baf crash_signal
        ../../gcc/gcc/toplev.c:336
0x734388 decl_mangling_context
        ../../gcc/gcc/cp/mangle.c:755
0x73a143 write_name
        ../../gcc/gcc/cp/mangle.c:794
0x73de43 write_class_enum_type
        ../../gcc/gcc/cp/mangle.c:2509
0x73de43 write_type
        ../../gcc/gcc/cp/mangle.c:1976
0x73dc6c write_type
        ../../gcc/gcc/cp/mangle.c:2047
0x73f897 write_method_parms
        ../../gcc/gcc/cp/mangle.c:2496
0x73fb9c write_bare_function_type
        ../../gcc/gcc/cp/mangle.c:2438
0x743398 mangle_decl_string
        ../../gcc/gcc/cp/mangle.c:3433
0x743577 get_mangled_id
        ../../gcc/gcc/cp/mangle.c:3455
0x743577 mangle_decl(tree_node*)
        ../../gcc/gcc/cp/mangle.c:3478
0xd91200 decl_assembler_name(tree_node*)
        ../../gcc/gcc/tree.c:600
0xddccf1 make_decl_rtl(tree_node*)
        ../../gcc/gcc/varasm.c:1274
0xddd96d notice_global_symbol(tree_node*)
        ../../gcc/gcc/varasm.c:1548
0x859ed5 cgraph_finalize_function(tree_node*, bool)
        ../../gcc/gcc/cgraphunit.c:434
0x6feb1f expand_or_defer_fn(tree_node*)
        ../../gcc/gcc/cp/semantics.c:3981
0x693527 cp_parser_function_definition_after_declarator
        ../../gcc/gcc/cp/parser.c:22686
0x694394 cp_parser_function_definition_from_specifiers_and_declarator
        ../../gcc/gcc/cp/parser.c:22590
0x694394 cp_parser_init_declarator
        ../../gcc/gcc/cp/parser.c:16588
0x69562f cp_parser_simple_declaration
        ../../gcc/gcc/cp/parser.c:11200
Please submit a full bug report, [etc.]


The C-frontend compiles the code without issues.