/* Convert language-specific tree expression to rtl instructions,
for GNU compiler.
Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 2000 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
+GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
-GNU CC is distributed in the hope that it will be useful,
+GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "tree.h"
#include "flags.h"
#include "except.h"
#include "tm_p.h"
-#if 0
-static tree extract_aggr_init PARAMS ((tree, tree));
-static tree extract_scalar_init PARAMS ((tree, tree));
-#endif
-static rtx cplus_expand_expr PARAMS ((tree, rtx, enum machine_mode,
- enum expand_modifier));
-
-/* Hook used by output_constant to expand language-specific
- constants. */
+/* Expand C++-specific constants. Currently, this means PTRMEM_CST. */
tree
-cplus_expand_constant (cst)
- tree cst;
+cplus_expand_constant (tree cst)
{
switch (TREE_CODE (cst))
{
{
tree type = TREE_TYPE (cst);
tree member;
- tree offset;
-
+
/* Find the member. */
member = PTRMEM_CST_MEMBER (cst);
- if (TREE_CODE (member) == FIELD_DECL)
+ if (TREE_CODE (member) == FIELD_DECL)
{
/* Find the offset for the field. */
- offset = convert (sizetype,
- size_binop (EASY_DIV_EXPR,
- DECL_FIELD_BITPOS (member),
- bitsize_int (BITS_PER_UNIT)));
-
- /* We offset all pointer to data members by 1 so that we
- can distinguish between a null pointer to data member
- and the first data member of a structure. */
- offset = size_binop (PLUS_EXPR, offset, size_one_node);
- cst = cp_convert (type, offset);
+ cst = byte_position (member);
+ while (!same_type_p (DECL_CONTEXT (member),
+ TYPE_PTRMEM_CLASS_TYPE (type)))
+ {
+ /* The MEMBER must have been nestled within an
+ anonymous aggregate contained in TYPE. Find the
+ anonymous aggregate. */
+ member = lookup_anon_field (TYPE_PTRMEM_CLASS_TYPE (type),
+ DECL_CONTEXT (member));
+ cst = size_binop (PLUS_EXPR, cst, byte_position (member));
+ }
+ cst = fold (build_nop (type, cst));
}
else
{
tree delta;
- tree idx;
tree pfn;
- tree delta2;
- expand_ptrmemfunc_cst (cst, &delta, &idx, &pfn, &delta2);
-
- cst = build_ptrmemfunc1 (type, delta, idx,
- pfn, delta2);
+ expand_ptrmemfunc_cst (cst, &delta, &pfn);
+ cst = build_ptrmemfunc1 (type, delta, pfn);
}
}
break;
return cst;
}
-
-/* Hook used by expand_expr to expand language-specific tree codes. */
-
-static rtx
-cplus_expand_expr (exp, target, tmode, modifier)
- tree exp;
- rtx target;
- enum machine_mode tmode;
- enum expand_modifier modifier;
-{
- tree type = TREE_TYPE (exp);
- register enum machine_mode mode = TYPE_MODE (type);
- register enum tree_code code = TREE_CODE (exp);
- int ignore = target == const0_rtx;
-
- if (ignore)
- target = 0;
-
- /* No sense saving up arithmetic to be done
- if it's all in the wrong mode to form part of an address.
- And force_operand won't know whether to sign-extend or zero-extend. */
-
- if (mode != Pmode && modifier == EXPAND_SUM)
- modifier = EXPAND_NORMAL;
-
- switch (code)
- {
- case PTRMEM_CST:
- return expand_expr (cplus_expand_constant (exp),
- target, tmode, modifier);
-
- case OFFSET_REF:
- {
- return expand_expr (default_conversion (resolve_offset_ref (exp)),
- target, tmode, EXPAND_NORMAL);
- }
-
- case THUNK_DECL:
- my_friendly_assert (DECL_RTL (exp) != NULL_RTX, 20000115);
- return DECL_RTL (exp);
-
- case THROW_EXPR:
- expand_expr (TREE_OPERAND (exp, 0), const0_rtx, VOIDmode, 0);
- expand_internal_throw ();
- return NULL;
-
- case EMPTY_CLASS_EXPR:
- /* We don't need to generate any code for an empty class. */
- return const0_rtx;
-
- case STMT_EXPR:
- {
- tree rtl_expr = expand_start_stmt_expr ();
- expand_stmt (STMT_EXPR_STMT (exp));
- expand_end_stmt_expr (rtl_expr);
- return expand_expr (rtl_expr, target, tmode, modifier);
- }
- break;
-
- default:
- break;
- }
- my_friendly_abort (40);
- /* NOTREACHED */
- return NULL;
-}
-
-void
-init_cplus_expand ()
-{
- lang_expand_expr = cplus_expand_expr;
- lang_expand_constant = cplus_expand_constant;
-}
-
-/* If DECL had its rtl moved from where callers expect it
- to be, fix it up. RESULT is the nominal rtl for the RESULT_DECL,
- which may be a pseudo instead of a hard register. */
-
-void
-fixup_result_decl (decl, result)
- tree decl;
- rtx result;
-{
- if (REG_P (result))
- {
- if (REGNO (result) >= FIRST_PSEUDO_REGISTER)
- {
- rtx real_decl_result;
-
-#ifdef FUNCTION_OUTGOING_VALUE
- real_decl_result
- = FUNCTION_OUTGOING_VALUE (TREE_TYPE (decl), current_function_decl);
-#else
- real_decl_result
- = FUNCTION_VALUE (TREE_TYPE (decl), current_function_decl);
-#endif
- REG_FUNCTION_VALUE_P (real_decl_result) = 1;
- result = real_decl_result;
- }
- store_expr (decl, result, 0);
- emit_insn (gen_rtx (USE, VOIDmode, result));
- }
-}
-
-#if 0
-/* Expand this initialization inline and see if it's simple enough that
- it can be done at compile-time. */
-
-static tree
-extract_aggr_init (decl, init)
- tree decl, init;
-{
- return 0;
-}
-
-static tree
-extract_scalar_init (decl, init)
- tree decl, init;
-{
- rtx value, insns, insn;
- extern struct obstack temporary_obstack;
- tree t = NULL_TREE;
-
- start_sequence ();
- value = expand_expr (init, NULL_RTX, VOIDmode, 0);
- insns = get_insns ();
- end_sequence ();
- reg_scan (insns, max_reg_num (), 0);
- jump_optimize (insns, 0, 0, 1);
-
- for (insn = insns; insn; insn = NEXT_INSN (insn))
- {
- rtx r, to;
-
- if (GET_CODE (insn) == NOTE)
- continue;
- else if (GET_CODE (insn) != INSN)
- return 0;
-
- r = PATTERN (insn);
- if (GET_CODE (r) != SET)
- return 0;
-
- to = XEXP (r, 0);
-
- if (! (to == value
- || (GET_CODE (to) == SUBREG && XEXP (to, 0) == value)))
- return 0;
-
- r = XEXP (r, 1);
-
- switch (GET_CODE (r))
- {
- case CONST_INT:
- t = build_int_2 (XEXP (r, 0), 0);
- break;
- default:
- return 0;
- }
- }
-
- return t;
-}
-#endif
-
-int
-extract_init (decl, init)
- tree decl ATTRIBUTE_UNUSED, init ATTRIBUTE_UNUSED;
-{
- return 0;
-
-#if 0
- if (IS_AGGR_TYPE (TREE_TYPE (decl))
- || TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
- init = extract_aggr_init (decl, init);
- else
- init = extract_scalar_init (decl, init);
-
- if (init == NULL_TREE)
- return 0;
-
- DECL_INITIAL (decl) = init;
- return 1;
-#endif
-}
-
-void
-do_case (start, end)
- tree start, end;
-{
- tree value1 = NULL_TREE, value2 = NULL_TREE, label;
-
- if (start != NULL_TREE && TREE_TYPE (start) != NULL_TREE
- && POINTER_TYPE_P (TREE_TYPE (start)))
- error ("pointers are not permitted as case values");
-
- if (end && pedantic)
- pedwarn ("ISO C++ forbids range expressions in switch statement");
-
- if (start)
- value1 = check_cp_case_value (start);
- if (end)
- value2 = check_cp_case_value (end);
-
- label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
-
- if (value1 != error_mark_node
- && value2 != error_mark_node)
- {
- tree duplicate;
- int success;
-
- if (end)
- success = pushcase_range (value1, value2, convert_and_check,
- label, &duplicate);
- else if (start)
- success = pushcase (value1, convert_and_check, label, &duplicate);
- else
- success = pushcase (NULL_TREE, 0, label, &duplicate);
-
- if (success == 1)
- {
- if (end)
- error ("case label not within a switch statement");
- else if (start)
- cp_error ("case label `%E' not within a switch statement", start);
- else
- error ("default label not within a switch statement");
- }
- else if (success == 2)
- {
- if (end)
- {
- error ("duplicate (or overlapping) case value");
- cp_error_at ("this is the first entry overlapping that value",
- duplicate);
- }
- else if (start)
- {
- cp_error ("duplicate case value `%E'", start);
- cp_error_at ("previously used here", duplicate);
- }
- else
- {
- error ("multiple default labels in one switch");
- cp_error_at ("this is the first default label", duplicate);
- }
- }
- else if (success == 3)
- warning ("case value out of range");
- else if (success == 4)
- warning ("empty range specified");
- else if (success == 5)
- {
- if (end)
- error ("case label within scope of cleanup or variable array");
- else if (! start)
- error ("`default' label within scope of cleanup or variable array");
- else
- cp_error ("case label `%E' within scope of cleanup or variable array", start);
- }
- }
-
- current_function_return_value = NULL_TREE;
-}
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