/* This file contains the definitions and documentation for the common
tree codes used in the GNU C and C++ compilers (see c-common.def
for the standard codes).
- Copyright (C) 2000 Free Software Foundation, Inc. Written by
- Benjamin Chelf (chelf@codesourcery.com).
+ Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+ Written by Benjamin Chelf (chelf@codesourcery.com).
-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
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+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) any later
+version.
-GNU CC 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.
+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 COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "config.h"
#include "system.h"
#include "flags.h"
#include "ggc.h"
#include "rtl.h"
+#include "expr.h"
#include "output.h"
#include "timevar.h"
+#include "predict.h"
+
+/* If non-NULL, the address of a language-specific function for
+ expanding statements. */
+void (*lang_expand_stmt) PARAMS ((tree));
+
+/* If non-NULL, the address of a language-specific function for
+ expanding a DECL_STMT. After the language-independent cases are
+ handled, this function will be called. If this function is not
+ defined, it is assumed that declarations other than those for
+ variables and labels do not require any RTL generation. */
+void (*lang_expand_decl_stmt) PARAMS ((tree));
+
+/* Create an empty statement tree rooted at T. */
+
+void
+begin_stmt_tree (t)
+ tree *t;
+{
+ /* We create a trivial EXPR_STMT so that last_tree is never NULL in
+ what follows. We remove the extraneous statement in
+ finish_stmt_tree. */
+ *t = build_nt (EXPR_STMT, void_zero_node);
+ last_tree = *t;
+ last_expr_type = NULL_TREE;
+ last_expr_filename = input_filename;
+}
+
+/* T is a statement. Add it to the statement-tree. */
+
+tree
+add_stmt (t)
+ tree t;
+{
+ if (input_filename != last_expr_filename)
+ {
+ /* If the filename has changed, also add in a FILE_STMT. Do a string
+ compare first, though, as it might be an equivalent string. */
+ int add = (strcmp (input_filename, last_expr_filename) != 0);
+ last_expr_filename = input_filename;
+ if (add)
+ {
+ tree pos = build_nt (FILE_STMT, get_identifier (input_filename));
+ add_stmt (pos);
+ }
+ }
+
+ /* Add T to the statement-tree. */
+ TREE_CHAIN (last_tree) = t;
+ last_tree = t;
+
+ /* When we expand a statement-tree, we must know whether or not the
+ statements are full-expressions. We record that fact here. */
+ STMT_IS_FULL_EXPR_P (last_tree) = stmts_are_full_exprs_p ();
+
+ /* Keep track of the number of statements in this function. */
+ if (current_function_decl)
+ ++DECL_NUM_STMTS (current_function_decl);
+
+ return t;
+}
+
+/* Create a declaration statement for the declaration given by the
+ DECL. */
+
+void
+add_decl_stmt (decl)
+ tree decl;
+{
+ tree decl_stmt;
+
+ /* We need the type to last until instantiation time. */
+ decl_stmt = build_stmt (DECL_STMT, decl);
+ add_stmt (decl_stmt);
+}
+
+/* Add a scope-statement to the statement-tree. BEGIN_P indicates
+ whether this statements opens or closes a scope. PARTIAL_P is true
+ for a partial scope, i.e, the scope that begins after a label when
+ an object that needs a cleanup is created. If BEGIN_P is nonzero,
+ returns a new TREE_LIST representing the top of the SCOPE_STMT
+ stack. The TREE_PURPOSE is the new SCOPE_STMT. If BEGIN_P is
+ zero, returns a TREE_LIST whose TREE_VALUE is the new SCOPE_STMT,
+ and whose TREE_PURPOSE is the matching SCOPE_STMT with
+ SCOPE_BEGIN_P set. */
+
+tree
+add_scope_stmt (begin_p, partial_p)
+ int begin_p;
+ int partial_p;
+{
+ tree *stack_ptr = current_scope_stmt_stack ();
+ tree ss;
+ tree top = *stack_ptr;
+
+ /* Build the statement. */
+ ss = build_stmt (SCOPE_STMT, NULL_TREE);
+ SCOPE_BEGIN_P (ss) = begin_p;
+ SCOPE_PARTIAL_P (ss) = partial_p;
+
+ /* Keep the scope stack up to date. */
+ if (begin_p)
+ {
+ top = tree_cons (ss, NULL_TREE, top);
+ *stack_ptr = top;
+ }
+ else
+ {
+ TREE_VALUE (top) = ss;
+ *stack_ptr = TREE_CHAIN (top);
+ }
+
+ /* Add the new statement to the statement-tree. */
+ add_stmt (ss);
+
+ return top;
+}
+
+/* Finish the statement tree rooted at T. */
+
+void
+finish_stmt_tree (t)
+ tree *t;
+{
+ tree stmt;
+
+ /* Remove the fake extra statement added in begin_stmt_tree. */
+ stmt = TREE_CHAIN (*t);
+ *t = stmt;
+ last_tree = NULL_TREE;
+
+ if (cfun && stmt)
+ {
+ /* The line-number recorded in the outermost statement in a function
+ is the line number of the end of the function. */
+ STMT_LINENO (stmt) = lineno;
+ STMT_LINENO_FOR_FN_P (stmt) = 1;
+ }
+}
/* Build a generic statement based on the given type of node and
arguments. Similar to `build_nt', except that we set
- TREE_COMPLEXITY to be the current line number. */
+ STMT_LINENO to be the current line number. */
+/* ??? This should be obsolete with the lineno_stmt productions
+ in the grammar. */
tree
build_stmt VPARAMS ((enum tree_code code, ...))
{
-#ifndef ANSI_PROTOTYPES
- enum tree_code code;
-#endif
- va_list p;
- register tree t;
- register int length;
- register int i;
+ tree t;
+ int length;
+ int i;
- VA_START (p, code);
-
-#ifndef ANSI_PROTOTYPES
- code = va_arg (p, enum tree_code);
-#endif
+ VA_OPEN (p, code);
+ VA_FIXEDARG (p, enum tree_code, code);
t = make_node (code);
length = TREE_CODE_LENGTH (code);
- TREE_COMPLEXITY (t) = lineno;
+ STMT_LINENO (t) = lineno;
for (i = 0; i < length; i++)
TREE_OPERAND (t, i) = va_arg (p, tree);
- va_end (p);
+ VA_CLOSE (p);
return t;
}
/* If we inlined this variable, we could see it's declaration
again. */
- if (DECL_RTL (decl))
+ if (TREE_ASM_WRITTEN (decl))
return;
- if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
- {
- /* The only way this situaton can occur is if the
- user specified a name for this DECL using the
- `attribute' syntax. */
- asmspec = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
- DECL_ASSEMBLER_NAME (decl) = DECL_NAME (decl);
- }
+ /* If the DECL_ASSEMBLER_NAME is not the same as the DECL_NAME, then
+ either we already created RTL for this DECL (and since it was a
+ local variable, its DECL_ASSEMBLER_NAME got hacked up to prevent
+ clashes with other local statics with the same name by a previous
+ call to make_decl_rtl), or the user explicitly requested a
+ particular assembly name for this variable, using the GNU
+ extension for this purpose:
+
+ int i asm ("j");
+
+ There's no way to know which case we're in, here. But, it turns
+ out we're safe. If there's already RTL, then
+ rest_of_decl_compilation ignores the ASMSPEC parameter, so we
+ may as well not pass it in. If there isn't RTL, then we didn't
+ already create RTL, which means that the modification to
+ DECL_ASSEMBLER_NAME came only via the explicit extension. */
+ if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl)
+ && !DECL_RTL_SET_P (decl))
+ asmspec = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
rest_of_decl_compilation (decl, asmspec, /*top_level=*/0, /*at_end=*/0);
}
tree decl;
{
/* Create RTL for this variable. */
- if (!DECL_RTL (decl))
+ if (!DECL_RTL_SET_P (decl))
{
- if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
- /* The user must have specified an assembler name for this
- variable. Set that up now. */
+ if (DECL_C_HARD_REGISTER (decl))
+ /* The user specified an assembler name for this variable.
+ Set that up now. */
rest_of_decl_compilation
(decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
/*top_level=*/0, /*at_end=*/0);
expand_end_target_temps ();
}
-/* Helper for generating the RTL at the beginning of a scope. */
+/* Helper for generating the RTL at the beginning of a scope. */
void
genrtl_do_pushlevel ()
clear_last_expr ();
}
-/* Helper for generating the RTL. */
-
-void
-genrtl_clear_out_block ()
-{
- /* If COND wasn't a declaration, clear out the
- block we made for it and start a new one here so the
- optimization in expand_end_loop will work. */
- if (getdecls () == NULL_TREE)
- genrtl_do_pushlevel ();
-}
-
-/* Generate the RTL for DESTINATION, which is a GOTO_STMT. */
+/* Generate the RTL for DESTINATION, which is a GOTO_STMT. */
void
genrtl_goto_stmt (destination)
expand_computed_goto (destination);
}
-/* Generate the RTL for EXPR, which is an EXPR_STMT. */
+/* Generate the RTL for EXPR, which is an EXPR_STMT. Provided just
+ for backward compatibility. genrtl_expr_stmt_value() should be
+ used for new code. */
-void
+void
genrtl_expr_stmt (expr)
tree expr;
{
+ genrtl_expr_stmt_value (expr, -1, 1);
+}
+
+/* Generate the RTL for EXPR, which is an EXPR_STMT. WANT_VALUE tells
+ whether to (1) save the value of the expression, (0) discard it or
+ (-1) use expr_stmts_for_value to tell. The use of -1 is
+ deprecated, and retained only for backward compatibility.
+ MAYBE_LAST is non-zero if this EXPR_STMT might be the last statement
+ in expression statement. */
+
+void
+genrtl_expr_stmt_value (expr, want_value, maybe_last)
+ tree expr;
+ int want_value, maybe_last;
+{
if (expr != NULL_TREE)
{
emit_line_note (input_filename, lineno);
if (stmts_are_full_exprs_p ())
expand_start_target_temps ();
- lang_expand_expr_stmt (expr);
+ if (expr != error_mark_node)
+ expand_expr_stmt_value (expr, want_value, maybe_last);
if (stmts_are_full_exprs_p ())
expand_end_target_temps ();
}
}
-/* Generate the RTL for T, which is a DECL_STMT. */
+/* Generate the RTL for T, which is a DECL_STMT. */
void
genrtl_decl_stmt (t)
DECL_ANON_UNION_ELEMS (decl));
}
else if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
- {
- if (DECL_ARTIFICIAL (decl) && ! TREE_USED (decl))
- /* Do not emit unused decls. This is not just an
- optimization. We really do not want to emit
- __PRETTY_FUNCTION__ etc, if they're never used. */
- DECL_IGNORED_P (decl) = 1;
- else
- make_rtl_for_local_static (decl);
- }
+ make_rtl_for_local_static (decl);
+ else if (TREE_CODE (decl) == LABEL_DECL
+ && C_DECLARED_LABEL_FLAG (decl))
+ declare_nonlocal_label (decl);
+ else if (lang_expand_decl_stmt)
+ (*lang_expand_decl_stmt) (t);
}
-/* Generate the RTL for T, which is an IF_STMT. */
+/* Generate the RTL for T, which is an IF_STMT. */
void
genrtl_if_stmt (t)
expand_end_cond ();
}
-/* Generate the RTL for T, which is a WHILE_STMT. */
+/* Generate the RTL for T, which is a WHILE_STMT. */
void
genrtl_while_stmt (t)
cond = expand_cond (WHILE_COND (t));
emit_line_note (input_filename, lineno);
- expand_exit_loop_if_false (0, cond);
- genrtl_clear_out_block ();
+ expand_exit_loop_top_cond (0, cond);
+ genrtl_do_pushlevel ();
expand_stmt (WHILE_BODY (t));
expand_end_loop ();
}
-/* Generate the RTL for T, which is a DO_STMT. */
+/* Generate the RTL for T, which is a DO_STMT. */
void
genrtl_do_stmt (t)
tree t;
{
- tree cond;
- emit_nop ();
- emit_line_note (input_filename, lineno);
- expand_start_loop_continue_elsewhere (1);
+ tree cond = DO_COND (t);
- expand_stmt (DO_BODY (t));
+ /* Recognize the common special-case of do { ... } while (0) and do
+ not emit the loop widgetry in this case. In particular this
+ avoids cluttering the rtl with dummy loop notes, which can affect
+ alignment of adjacent labels. */
+ if (integer_zerop (cond))
+ {
+ expand_start_null_loop ();
+ expand_stmt (DO_BODY (t));
+ expand_end_null_loop ();
+ }
+ else
+ {
+ emit_nop ();
+ emit_line_note (input_filename, lineno);
+ expand_start_loop_continue_elsewhere (1);
- expand_loop_continue_here ();
+ expand_stmt (DO_BODY (t));
- cond = expand_cond (DO_COND (t));
- emit_line_note (input_filename, lineno);
- expand_exit_loop_if_false (0, cond);
- expand_end_loop ();
+ expand_loop_continue_here ();
+ cond = expand_cond (cond);
+ emit_line_note (input_filename, lineno);
+ expand_exit_loop_if_false (0, cond);
+ expand_end_loop ();
+ }
}
-/* Build the node for a return statement and return it. */
+/* Build the node for a return statement and return it. */
tree
build_return_stmt (expr)
return (build_stmt (RETURN_STMT, expr));
}
-/* Generate the RTL for EXPR, which is a RETURN_STMT. */
+/* Generate the RTL for STMT, which is a RETURN_STMT. */
void
-genrtl_return_stmt (expr)
- tree expr;
+genrtl_return_stmt (stmt)
+ tree stmt;
{
+ tree expr;
+
+ expr = RETURN_EXPR (stmt);
+
emit_line_note (input_filename, lineno);
- c_expand_return (expr);
+ if (!expr)
+ expand_null_return ();
+ else
+ {
+ expand_start_target_temps ();
+ expand_return (expr);
+ expand_end_target_temps ();
+ }
}
-/* Generate the RTL for T, which is a FOR_STMT. */
+/* Generate the RTL for T, which is a FOR_STMT. */
void
genrtl_for_stmt (t)
tree t;
{
- tree tmp;
tree cond;
+ const char *saved_filename;
+ int saved_lineno;
+
if (NEW_FOR_SCOPE_P (t))
genrtl_do_pushlevel ();
expand_stmt (FOR_INIT_STMT (t));
+ /* Expand the initialization. */
emit_nop ();
emit_line_note (input_filename, lineno);
expand_start_loop_continue_elsewhere (1);
genrtl_do_pushlevel ();
cond = expand_cond (FOR_COND (t));
+
+ /* Save the filename and line number so that we expand the FOR_EXPR
+ we can reset them back to the saved values. */
+ saved_filename = input_filename;
+ saved_lineno = lineno;
+
+ /* Expand the condition. */
emit_line_note (input_filename, lineno);
if (cond)
- expand_exit_loop_if_false (0, cond);
- genrtl_clear_out_block ();
- tmp = FOR_EXPR (t);
+ expand_exit_loop_top_cond (0, cond);
+ /* Expand the body. */
+ genrtl_do_pushlevel ();
expand_stmt (FOR_BODY (t));
+ /* Expand the increment expression. */
+ input_filename = saved_filename;
+ lineno = saved_lineno;
emit_line_note (input_filename, lineno);
expand_loop_continue_here ();
- if (tmp)
- genrtl_expr_stmt (tmp);
+ if (FOR_EXPR (t))
+ genrtl_expr_stmt (FOR_EXPR (t));
expand_end_loop ();
}
-/* Build a break statement node and return it. */
+/* Build a break statement node and return it. */
tree
build_break_stmt ()
return (build_stmt (BREAK_STMT));
}
-/* Generate the RTL for a BREAK_STMT. */
+/* Generate the RTL for a BREAK_STMT. */
void
genrtl_break_stmt ()
error ("break statement not within loop or switch");
}
-/* Build a continue statement node and return it. */
+/* Build a continue statement node and return it. */
tree
build_continue_stmt ()
return (build_stmt (CONTINUE_STMT));
}
-/* Generate the RTL for a CONTINUE_STMT. */
+/* Generate the RTL for a CONTINUE_STMT. */
void
genrtl_continue_stmt ()
error ("continue statement not within a loop");
}
-/* Generate the RTL for T, which is a SCOPE_STMT. */
+/* Generate the RTL for T, which is a SCOPE_STMT. */
void
genrtl_scope_stmt (t)
tree t;
{
+ tree block = SCOPE_STMT_BLOCK (t);
+
if (!SCOPE_NO_CLEANUPS_P (t))
{
if (SCOPE_BEGIN_P (t))
- expand_start_bindings_and_block (2 * SCOPE_NULLIFIED_P (t),
- SCOPE_STMT_BLOCK (t));
+ expand_start_bindings_and_block (2 * SCOPE_NULLIFIED_P (t), block);
else if (SCOPE_END_P (t))
expand_end_bindings (NULL_TREE, !SCOPE_NULLIFIED_P (t), 0);
}
(SCOPE_BEGIN_P (t)
? NOTE_INSN_BLOCK_BEG
: NOTE_INSN_BLOCK_END));
- NOTE_BLOCK (note) = SCOPE_STMT_BLOCK (t);
+ NOTE_BLOCK (note) = block;
+ }
+
+ /* If we're at the end of a scope that contains inlined nested
+ functions, we have to decide whether or not to write them out. */
+ if (block && SCOPE_END_P (t))
+ {
+ tree fn;
+
+ for (fn = BLOCK_VARS (block); fn; fn = TREE_CHAIN (fn))
+ {
+ if (TREE_CODE (fn) == FUNCTION_DECL
+ && DECL_CONTEXT (fn) == current_function_decl
+ && !TREE_ASM_WRITTEN (fn)
+ && TREE_ADDRESSABLE (fn))
+ {
+ push_function_context ();
+ output_inline_function (fn);
+ pop_function_context ();
+ }
+ }
}
}
-/* Generate the RTL for T, which is a SWITCH_STMT. */
+/* Generate the RTL for T, which is a SWITCH_STMT. */
void
genrtl_switch_stmt (t)
genrtl_do_pushlevel ();
cond = expand_cond (SWITCH_COND (t));
- if (cond != error_mark_node)
- {
- emit_line_note (input_filename, lineno);
- c_expand_start_case (cond);
- }
- else
+ if (cond == error_mark_node)
/* The code is in error, but we don't want expand_end_case to
- crash. */
- c_expand_start_case (boolean_false_node);
+ crash. */
+ cond = boolean_false_node;
+ emit_line_note (input_filename, lineno);
+ expand_start_case (1, cond, TREE_TYPE (cond), "switch statement");
expand_stmt (SWITCH_BODY (t));
-
- expand_end_case (cond);
+ expand_end_case_type (cond, SWITCH_TYPE (t));
}
-/* Create a CASE_LABEL tree node and return it. */
+/* Create a CASE_LABEL tree node and return it. */
tree
-build_case_label (low_value, high_value)
+build_case_label (low_value, high_value, label_decl)
tree low_value;
tree high_value;
+ tree label_decl;
{
- return build_stmt (CASE_LABEL, low_value, high_value);
+ return build_stmt (CASE_LABEL, low_value, high_value, label_decl);
}
-/* Generate the RTL for a CASE_LABEL. */
+/* Generate the RTL for a CASE_LABEL. */
void
-genrtl_case_label (low_value, high_value)
- tree low_value;
- tree high_value;
+genrtl_case_label (case_label)
+ tree case_label;
{
- do_case (low_value, high_value);
+ tree duplicate;
+ tree cleanup;
+
+ cleanup = last_cleanup_this_contour ();
+ if (cleanup)
+ {
+ static int explained = 0;
+ warning_with_decl (TREE_PURPOSE (cleanup),
+ "destructor needed for `%#D'");
+ warning ("where case label appears here");
+ if (!explained)
+ {
+ warning ("(enclose actions of previous case statements requiring destructors in their own scope.)");
+ explained = 1;
+ }
+ }
+
+ add_case_node (CASE_LOW (case_label), CASE_HIGH (case_label),
+ CASE_LABEL_DECL (case_label), &duplicate);
}
-/* Generate the RTL for T, which is a COMPOUND_STMT. */
+/* Generate the RTL for T, which is a COMPOUND_STMT. */
void
genrtl_compound_stmt (t)
tree t;
{
- /* If this is the outermost block of the function, declare the
- variables __FUNCTION__, __PRETTY_FUNCTION__, and so forth. */
- if (cfun
- && !current_function_name_declared ()
- && !COMPOUND_STMT_NO_SCOPE (t))
- {
- set_current_function_name_declared (1);
- declare_function_name ();
- }
+#ifdef ENABLE_CHECKING
+ struct nesting *n = current_nesting_level ();
+#endif
expand_stmt (COMPOUND_BODY (t));
+
+#ifdef ENABLE_CHECKING
+ /* Make sure that we've pushed and popped the same number of levels. */
+ if (!COMPOUND_STMT_NO_SCOPE (t) && n != current_nesting_level ())
+ abort ();
+#endif
}
-/* Generate the RTL for an ASM_STMT. */
+/* Generate the RTL for an ASM_STMT. */
void
genrtl_asm_stmt (cv_qualifier, string, output_operands,
- input_operands, clobbers)
+ input_operands, clobbers, asm_input_p)
tree cv_qualifier;
tree string;
tree output_operands;
tree input_operands;
tree clobbers;
+ int asm_input_p;
{
- if (TREE_CHAIN (string))
- string = combine_strings (string);
-
if (cv_qualifier != NULL_TREE
&& cv_qualifier != ridpointers[(int) RID_VOLATILE])
{
}
emit_line_note (input_filename, lineno);
- if (output_operands != NULL_TREE || input_operands != NULL_TREE
- || clobbers != NULL_TREE)
- c_expand_asm_operands (string, output_operands,
- input_operands,
- clobbers,
- cv_qualifier != NULL_TREE,
- input_filename, lineno);
- else
+ if (asm_input_p)
expand_asm (string);
+ else
+ c_expand_asm_operands (string, output_operands, input_operands,
+ clobbers, cv_qualifier != NULL_TREE,
+ input_filename, lineno);
}
-/* Generate the RTL for a DECL_CLEANUP. */
+/* Generate the RTL for a DECL_CLEANUP. */
void
-genrtl_decl_cleanup (decl, cleanup)
- tree decl;
- tree cleanup;
+genrtl_decl_cleanup (t)
+ tree t;
{
+ tree decl = CLEANUP_DECL (t);
if (!decl || (DECL_SIZE (decl) && TREE_TYPE (decl) != error_mark_node))
- expand_decl_cleanup (decl, cleanup);
+ expand_decl_cleanup_eh (decl, CLEANUP_EXPR (t), CLEANUP_EH_ONLY (t));
+}
+
+/* We're about to expand T, a statement. Set up appropriate context
+ for the substitution. */
+
+void
+prep_stmt (t)
+ tree t;
+{
+ if (!STMT_LINENO_FOR_FN_P (t))
+ lineno = STMT_LINENO (t);
+ current_stmt_tree ()->stmts_are_full_exprs_p = STMT_IS_FULL_EXPR_P (t);
}
/* Generate the RTL for the statement T, its substatements, and any
- other statements at its nesting level. */
+ other statements at its nesting level. */
-tree
+void
expand_stmt (t)
tree t;
{
- tree rval;
- rval = lang_expand_stmt (t);
- return rval;
+ while (t && t != error_mark_node)
+ {
+ int saved_stmts_are_full_exprs_p;
+
+ /* Set up context appropriately for handling this statement. */
+ saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
+ prep_stmt (t);
+
+ switch (TREE_CODE (t))
+ {
+ case FILE_STMT:
+ input_filename = FILE_STMT_FILENAME (t);
+ break;
+
+ case RETURN_STMT:
+ genrtl_return_stmt (t);
+ break;
+
+ case EXPR_STMT:
+ genrtl_expr_stmt_value (EXPR_STMT_EXPR (t), TREE_ADDRESSABLE (t),
+ TREE_CHAIN (t) == NULL
+ || (TREE_CODE (TREE_CHAIN (t)) == SCOPE_STMT
+ && TREE_CHAIN (TREE_CHAIN (t)) == NULL));
+ break;
+
+ case DECL_STMT:
+ genrtl_decl_stmt (t);
+ break;
+
+ case FOR_STMT:
+ genrtl_for_stmt (t);
+ break;
+
+ case WHILE_STMT:
+ genrtl_while_stmt (t);
+ break;
+
+ case DO_STMT:
+ genrtl_do_stmt (t);
+ break;
+
+ case IF_STMT:
+ genrtl_if_stmt (t);
+ break;
+
+ case COMPOUND_STMT:
+ genrtl_compound_stmt (t);
+ break;
+
+ case BREAK_STMT:
+ genrtl_break_stmt ();
+ break;
+
+ case CONTINUE_STMT:
+ genrtl_continue_stmt ();
+ break;
+
+ case SWITCH_STMT:
+ genrtl_switch_stmt (t);
+ break;
+
+ case CASE_LABEL:
+ genrtl_case_label (t);
+ break;
+
+ case LABEL_STMT:
+ expand_label (LABEL_STMT_LABEL (t));
+ break;
+
+ case GOTO_STMT:
+ /* Emit information for branch prediction. */
+ if (!GOTO_FAKE_P (t)
+ && TREE_CODE (GOTO_DESTINATION (t)) == LABEL_DECL)
+ {
+ rtx note = emit_note (NULL, NOTE_INSN_PREDICTION);
+
+ NOTE_PREDICTION (note) = NOTE_PREDICT (PRED_GOTO, NOT_TAKEN);
+ }
+ genrtl_goto_stmt (GOTO_DESTINATION (t));
+ break;
+
+ case ASM_STMT:
+ genrtl_asm_stmt (ASM_CV_QUAL (t), ASM_STRING (t),
+ ASM_OUTPUTS (t), ASM_INPUTS (t),
+ ASM_CLOBBERS (t), ASM_INPUT_P (t));
+ break;
+
+ case SCOPE_STMT:
+ genrtl_scope_stmt (t);
+ break;
+
+ case CLEANUP_STMT:
+ genrtl_decl_cleanup (t);
+ break;
+
+ default:
+ if (lang_expand_stmt)
+ (*lang_expand_stmt) (t);
+ else
+ abort ();
+ break;
+ }
+
+ /* Restore saved state. */
+ current_stmt_tree ()->stmts_are_full_exprs_p
+ = saved_stmts_are_full_exprs_p;
+
+ /* Go on to the next statement in this scope. */
+ t = TREE_CHAIN (t);
+ }
}
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