1 /* This file contains subroutine used by the C front-end to construct GENERIC.
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Written by Benjamin Chelf (chelf@codesourcery.com).
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
25 #include "tree-iterator.h"
27 /* Create an empty statement tree rooted at T. */
33 t = alloc_stmt_list ();
34 vec_safe_push (stmt_list_stack, t);
38 /* Finish the statement tree rooted at T. */
41 pop_stmt_list (tree t)
45 /* Pop statement lists until we reach the target level. The extra
46 nestings will be due to outstanding cleanups. */
49 u = stmt_list_stack->pop ();
50 if (!stmt_list_stack->is_empty ())
52 tree x = stmt_list_stack->last ();
53 STATEMENT_LIST_HAS_LABEL (x) |= STATEMENT_LIST_HAS_LABEL (u);
59 gcc_assert (u != NULL_TREE);
61 /* If the statement list is completely empty, just return it. This is
62 just as good small as build_empty_stmt, with the advantage that
63 statement lists are merged when they appended to one another. So
64 using the STATEMENT_LIST avoids pathological buildup of EMPTY_STMT_P
66 if (TREE_SIDE_EFFECTS (t))
68 tree_stmt_iterator i = tsi_start (t);
69 if (i.ptr->next && i.ptr->next->stmt &&
70 TREE_CODE(i.ptr->next->stmt) == STATEMENT_LIST_END)
72 tree_stmt_iterator i = tsi_last (t);
76 /* If the statement list contained exactly one statement, then
77 extract it immediately. */
78 if (tsi_one_before_end_p (i))
90 /* Build a generic statement based on the given type of node and
91 arguments. Similar to `build_nt', except that we set
92 EXPR_LOCATION to LOC. */
93 /* ??? This should be obsolete with the lineno_stmt productions
97 build_stmt (location_t loc, enum tree_code code, ...)
104 /* This function cannot be used to construct variably-sized nodes. */
105 gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp);
109 ret = make_node (code);
110 TREE_TYPE (ret) = void_type_node;
111 length = TREE_CODE_LENGTH (code);
112 SET_EXPR_LOCATION (ret, loc);
114 /* TREE_SIDE_EFFECTS will already be set for statements with
115 implicit side effects. Here we make sure it is set for other
116 expressions by checking whether the parameters have side
119 side_effects = false;
120 for (i = 0; i < length; i++)
122 tree t = va_arg (p, tree);
123 if (t && !TYPE_P (t))
124 side_effects |= TREE_SIDE_EFFECTS (t);
125 TREE_OPERAND (ret, i) = t;
128 TREE_SIDE_EFFECTS (ret) |= side_effects;
134 /* Build a REALPART_EXPR or IMAGPART_EXPR, according to CODE, from ARG. */
137 build_real_imag_expr (location_t location, enum tree_code code, tree arg)
140 tree arg_type = TREE_TYPE (arg);
142 gcc_assert (code == REALPART_EXPR || code == IMAGPART_EXPR);
144 if (TREE_CODE (arg_type) == COMPLEX_TYPE)
146 ret = build1 (code, TREE_TYPE (TREE_TYPE (arg)), arg);
147 SET_EXPR_LOCATION (ret, location);
149 else if (INTEGRAL_TYPE_P (arg_type) || SCALAR_FLOAT_TYPE_P (arg_type))
151 ret = (code == REALPART_EXPR
153 : omit_one_operand_loc (location, arg_type,
154 integer_zero_node, arg));
158 error_at (location, "wrong type argument to %s",
159 code == REALPART_EXPR ? "__real" : "__imag");
160 ret = error_mark_node;