https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70139
--- Comment #5 from Viktor Ostashevskyi <ostash at ostash dot kiev.ua> --- Bisected to: commit 9c96033c877975303250d6f6156eacba52fc8b44 Author: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> Date: Mon Nov 17 18:16:14 2014 +0000 C++14 constexpr support (minus loops and multiple returns) gcc/ * tree-inline.c (copy_fn): New. * tree-inline.h: Declare it. gcc/cp/ * constexpr.c (use_new_call): New macro. (build_data_member_initialization): Ignore non-mem-inits. (check_constexpr_bind_expr_vars): Remove C++14 checks. (constexpr_fn_retval): Likewise. (check_constexpr_ctor_body): Do nothing in C++14. (massage_constexpr_body): In C++14 only collect mem-inits. (get_function_named_in_call): Handle null CALL_EXPR_FN. (cxx_bind_parameters_in_call): Build bindings in same order as parameters. Don't treat iniviref parms specially in new call mode. (cxx_eval_call_expression): If use_new_call, do constexpr expansion based on DECL_SAVED_TREE rather than the massaged constexpr body. Set up ctx->object from AGGR_INIT_EXPR_SLOT if we don't have one. (is_sub_constant_expr): Don't mess with ctx.ctor here. (cxx_eval_component_reference): A null element means we're mid- initialization. (cxx_eval_store_expression, cxx_eval_increment_expression): New. (cxx_eval_constant_expression): Handle RESULT_DECL, DECL_EXPR, MODIFY_EXPR, STATEMENT_LIST, BIND_EXPR, USING_STMT, PREINCREMENT_EXPR, POSTINCREMENT_EXPR, PREDECREMENT_EXPR, POSTDECREMENT_EXPR. Don't look into DECL_INITIAL of variables in constexpr functions. In new-call mode find parms in the values table. (potential_constant_expression_1): Handle null CALL_EXPR_FN. Handle STATEMENT_LIST, MODIFY_EXPR, MODOP_EXPR, IF_STMT, PREINCREMENT_EXPR, POSTINCREMENT_EXPR, PREDECREMENT_EXPR, POSTDECREMENT_EXPR, BIND_EXPR, WITH_CLEANUP_EXPR, CLEANUP_POINT_EXPR, MUST_NOT_THROW_EXPR, TRY_CATCH_EXPR, EH_SPEC_BLOCK, EXPR_STMT, DECL_EXPR, CASE_LABEL_EXPR, BREAK_STMT, CONTINUE_STMT, USING_STMT, IF_STMT, DO_STMT, FOR_STMT, WHILE_STMT, SWITCH_STMT, ASM_EXPR. (cxx_eval_vec_init_1): Call build_aggr_init_expr. (cxx_eval_indirect_ref): Don't return a CONSTRUCTOR when the caller wants an lvalue. (cxx_eval_outermost_constant_expr): Pull object out of AGGR_INIT_EXPR. (maybe_constant_init): Look through INIT_EXPR. (ensure_literal_type_for_constexpr_object): Set cp_function_chain->invalid_constexpr. * cp-tree.h (struct language_function): Add invalid_constexpr bitfield. * decl.c (start_decl): Set cp_function_chain->invalid_constexpr. (check_for_uninitialized_const_var): Likewise. (maybe_save_function_definition): Check it. * parser.c (cp_parser_jump_statement): Set cp_function_chain->invalid_constexpr. (cp_parser_asm_definition): Likewise. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@217663 138bc75d-0d04-0410-961f-82ee72b054a4
