1 /* Convert language-specific tree expression to rtl instructions,
3 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
26 #include "coretypes.h"
37 /* Hook used by output_constant to expand language-specific
41 cplus_expand_constant (tree cst)
43 switch (TREE_CODE (cst))
47 tree type = TREE_TYPE (cst);
50 /* Find the member. */
51 member = PTRMEM_CST_MEMBER (cst);
53 if (TREE_CODE (member) == FIELD_DECL)
55 /* Find the offset for the field. */
56 tree offset = byte_position (member);
57 cst = fold (build1 (NOP_EXPR, type, offset));
64 expand_ptrmemfunc_cst (cst, &delta, &pfn);
65 cst = build_ptrmemfunc1 (type, delta, pfn);
71 /* There's nothing to do. */
78 /* Hook used by expand_expr to expand language-specific tree codes. */
81 cxx_expand_expr (tree exp, rtx target, enum machine_mode tmode, int modifier)
83 tree type = TREE_TYPE (exp);
84 register enum machine_mode mode = TYPE_MODE (type);
85 register enum tree_code code = TREE_CODE (exp);
88 /* No sense saving up arithmetic to be done
89 if it's all in the wrong mode to form part of an address.
90 And force_operand won't know whether to sign-extend or zero-extend. */
92 if (mode != Pmode && modifier == EXPAND_SUM)
93 modifier = EXPAND_NORMAL;
98 return expand_expr (cplus_expand_constant (exp),
99 target, tmode, modifier);
102 /* Offset refs should not make it through to here. */
107 expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0);
110 case MUST_NOT_THROW_EXPR:
111 expand_eh_region_start ();
112 ret = expand_expr (TREE_OPERAND (exp, 0), target, tmode, modifier);
113 expand_eh_region_end_must_not_throw (build_call (terminate_node, 0));
116 case EMPTY_CLASS_EXPR:
117 /* We don't need to generate any code for an empty class. */
121 return expand_expr (BASELINK_FUNCTIONS (exp), target, tmode,
125 return c_expand_expr (exp, target, tmode, modifier);