[Bug middle-end/89037] New: checking ice emitting 128-bit bit-field initializer

[rearnsha at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89037

            Bug ID: 89037
           Summary: checking ice emitting 128-bit bit-field initializer
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-checking, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rearnsha at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

/* ./cc1 testcase.c  */
struct s
{
  __int128 y : 65;
};
typedef struct s T;
T a = { 1 };

Results in 

besttry.c:7:1: internal compiler error: tree check: accessed elt 2 of
tree_int_cst with 1 elts in output_constructor_bitfield, at varasm.c:5410
    7 | T a = { 1 };
      | ^
0x5be4f1 tree_int_cst_elt_check_failed(int, int, char const*, int, char const*)
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/tree.c:9999
0x740049 tree_int_cst_elt_check(tree_node*, int, char const*, int, char const*)
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/tree.h:3378
0xf8d530 output_constructor_bitfield
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varasm.c:5410
0xf8db12 output_constructor
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varasm.c:5524
0xf8c27f output_constant
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varasm.c:5037
0xf81a96 assemble_variable_contents
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varasm.c:2144
0xf82519 assemble_variable(tree_node*, int, int, int)
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varasm.c:2323
0xfa03c4 varpool_node::assemble_decl()
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/varpool.c:586
0x7ac56c output_in_order
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/cgraphunit.c:2443
0x7ac56c symbol_table::compile()
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/cgraphunit.c:2683
0x7aef96 symbol_table::compile()
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/cgraphunit.c:2865
0x7aef96 symbol_table::finalize_compilation_unit()
        /home/rearnsha/gnusrc/gcc-cross/trunk/gcc/cgraphunit.c:2862
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