[Bug c++/83911] [6/7/8 Regression] ICE with target attribute on constructor in gimplify_expr at gimplify.c:11321

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83911

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.9.4
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2018-01-26
                 CC|                            |msebor at gcc dot gnu.org,
                   |                            |rsandifo at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|ICE with target attribute   |[6/7/8 Regression] ICE with
                   |on constructor in           |target attribute on
                   |gimplify_expr at            |constructor in
                   |gimplify.c:11321            |gimplify_expr at
                   |                            |gimplify.c:11321
      Known to fail|                            |5.4.0, 6.4.0, 7.2.0, 8.0

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with GCC 5, 6, 7, and 8.  Bisection points to Richard's r210692
committed in gcc 4.10 (5.0).

GCC 8 abends with the following output:

gcc -O2 -S -Wall -Wextra pr83911.C
pr83911.C: In constructor ‘SimdFloat::SimdFloat(float)’:
pr83911.C:5:21: warning: unused parameter ‘x’ [-Wunused-parameter]
     SimdFloat(float x) {}
               ~~~~~~^
pr83911.C: In constructor ‘SimdFloat::SimdFloat(float)’:
pr83911.C:8:21: warning: unused parameter ‘x’ [-Wunused-parameter]
     SimdFloat(float x) {}
               ~~~~~~^
pr83911.C: In function ‘SimdFloat foo()’:
pr83911.C:13:12: internal compiler error: in
ix86_get_function_versions_dispatcher, at config/i386/i386.c:32432
     return 1;
            ^
0x13f2168 ix86_get_function_versions_dispatcher
        /ssd/src/gcc/svn/gcc/config/i386/i386.c:32432
0x7e5a3c get_function_version_dispatcher(tree_node*)
        /ssd/src/gcc/svn/gcc/cp/call.c:7479
0x7e7b1c build_over_call
        /ssd/src/gcc/svn/gcc/cp/call.c:8191
0x7e3af0 convert_like_real
        /ssd/src/gcc/svn/gcc/cp/call.c:6783
0x7e42c6 convert_like_real
        /ssd/src/gcc/svn/gcc/cp/call.c:6909
0x7ee318 perform_implicit_conversion_flags(tree_node*, tree_node*, int, int)
        /ssd/src/gcc/svn/gcc/cp/call.c:10574
0x9b6b5c convert_for_initialization(tree_node*, tree_node*, tree_node*, int,
impl_conv_rhs, tree_node*, int, int)
        /ssd/src/gcc/svn/gcc/cp/typeck.c:8982
0x9b7bd4 check_return_expr(tree_node*, bool*)
        /ssd/src/gcc/svn/gcc/cp/typeck.c:9372
0x97004f finish_return_stmt(tree_node*)
        /ssd/src/gcc/svn/gcc/cp/semantics.c:890
0x8def99 cp_parser_jump_statement
        /ssd/src/gcc/svn/gcc/cp/parser.c:12368
0x8dbf5c cp_parser_statement
        /ssd/src/gcc/svn/gcc/cp/parser.c:10773
0x8dcbe1 cp_parser_statement_seq_opt
        /ssd/src/gcc/svn/gcc/cp/parser.c:11218
0x8dcad7 cp_parser_compound_statement
        /ssd/src/gcc/svn/gcc/cp/parser.c:11172
0x8ee1dd cp_parser_function_body
        /ssd/src/gcc/svn/gcc/cp/parser.c:21712
0x8ee2e8 cp_parser_ctor_initializer_opt_and_function_body
        /ssd/src/gcc/svn/gcc/cp/parser.c:21747
0x8f6245 cp_parser_function_definition_after_declarator
        /ssd/src/gcc/svn/gcc/cp/parser.c:26648
0x8f606b cp_parser_function_definition_from_specifiers_and_declarator
        /ssd/src/gcc/svn/gcc/cp/parser.c:26565
0x8ea718 cp_parser_init_declarator
        /ssd/src/gcc/svn/gcc/cp/parser.c:19436
0x8e02b3 cp_parser_simple_declaration
        /ssd/src/gcc/svn/gcc/cp/parser.c:13009
0x8dfe48 cp_parser_block_declaration
        /ssd/src/gcc/svn/gcc/cp/parser.c:12827
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