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* opencl-lang.c (lval_func_check_synthetic_pointer): New
function.
* value.h (struct lval_funcs) <indirect, check_synthetic_pointer>:
New fields.
(value_bits_synthetic_pointer): Declare.
* value.c (value_bits_synthetic_pointer): New function.
* valprint.c (valprint_check_validity): Handle synthetic
pointers.
* valops.c (value_ind): Use new 'indirect' lval_funcs method.
* valarith.c (value_ptradd): Use set_value_component_location.
* p-valprint.c (pascal_object_print_value_fields): Handle
synthetic pointers.
* jv-valprint.c (java_print_value_fields): Handle synthetic
pointers.
* dwarf2read.c (dwarf_stack_op_name): Add
DW_OP_GNU_implicit_pointer.
(dwarf2_fetch_die_location_block): Add get_frame_pc, baton
arguments. Handle location lists.
(fill_in_loclist_baton): New function.
(dwarf2_symbol_mark_computed): Use it.
* dwarf2loc.h (dwarf2_find_location_expression): Declare.
(dwarf2_fetch_die_location_block): Add get_frame_pc, baton
arguments.
* dwarf2loc.c (dwarf2_find_location_expression): Rename from
find_location_expression. No longer static. Update all callers.
(dwarf_expr_frame_pc): New function.
(per_cu_dwarf_call): Add get_frame_pc, baton arguments. Update
all callers.
(struct piece_closure) <per_cu>: New field.
(allocate_piece_closure): Add per_cu argument.
(read_pieced_value): Handle DWARF_VALUE_IMPLICIT_POINTER.
(check_pieced_value_bits): Remove validity argument, add check_for
argument. Handle DWARF_VALUE_IMPLICIT_POINTER.
(check_pieced_value_validity, check_pieced_value_invalid):
Update.
(check_pieced_synthetic_pointer): New function.
(get_frame_address_in_block_wrapper): New function.
(indirect_pieced_value): New function.
(pieced_value_funcs): Update.
(invalid_synthetic_pointer): New function.
(dwarf2_evaluate_loc_desc_full): Rename from
dwarf2_evaluate_loc_desc. Add byte_offset argument.
(dwarf2_evaluate_loc_desc): Rewrite.
(dwarf2_loc_desc_needs_frame): Set new field on context.
(get_ax_pc): New function.
(disassemble_dwarf_expression): Handle
DW_OP_GNU_implicit_pointer.
* dwarf2expr.h (enum dwarf_value_location)
<DWARF_VALUE_IMPLICIT_POINTER>: New constant.
(struct dwarf_expr_context) <get_frame_pc>: New field.
(struct dwarf_expr_piece) <v.ptr>: New field.
* dwarf2expr.c (add_piece): Handle DWARF_VALUE_IMPLICIT_POINTER.
(execute_stack_op): Handle DW_OP_GNU_implicit_pointer.
* dwarf2-frame.c (no_get_frame_pc): New function.
(execute_stack_op): Set new field on context.
* cp-valprint.c (cp_print_value_fields): Handle synthetic
pointers.
gdb/testsuite
* gdb.dwarf2/implptr.exp: New file.
* gdb.dwarf2/implptr.c: New file.
* gdb.dwarf2/implptr.S: New file.
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