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cp-tree.h (begin_switch_stmt): Adjust prototype.

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* cp-tree.h (begin_switch_stmt): Adjust prototype.
	(finish_switch_cond): Likewise.
	* parse.y (simple_stmt): Adjust accordingly.
	* parse.c: Regenerated.
	* pt.c (tsubst_expr): Adjust accordingly.
	* semantics.c (expand_cond): New function.
	(FINISH_COND): New macro.
	(begin_switch_stmt): Build the SWITCH_STMT here.
	(finish_switch_stmt_cond): Not here.
	(expand_stmt): Adjust calls to begin_switch_stmt and
	finish_switch_cond.  Use expand_cond throughout.

From-SVN: r29246
This commit is contained in:
Mark Mitchell 1999-09-09 22:28:15 +00:00 committed by Mark Mitchell
parent 8a79e5cb72
commit 527f0080b0
7 changed files with 100 additions and 38 deletions
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12
gcc/cp/ChangeLog
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@ -1,5 +1,17 @@
1999-09-09 Mark Mitchell <mark@codesourcery.com>
* cp-tree.h (begin_switch_stmt): Adjust prototype.
(finish_switch_cond): Likewise.
* parse.y (simple_stmt): Adjust accordingly.
* parse.c: Regenerated.
* pt.c (tsubst_expr): Adjust accordingly.
* semantics.c (expand_cond): New function.
(FINISH_COND): New macro.
(begin_switch_stmt): Build the SWITCH_STMT here.
(finish_switch_stmt_cond): Not here.
(expand_stmt): Adjust calls to begin_switch_stmt and
finish_switch_cond. Use expand_cond throughout.
* dump.c (dequeue_and_dump): Dump types for constants.
Describe DECL_ARG_TYPE more intuitively.
Handle ARRAY_REF.

4
gcc/cp/cp-tree.h
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@ -3572,8 +3572,8 @@ extern void finish_for_expr PROTO((tree, tree));
extern void finish_for_stmt PROTO((tree, tree));
extern void finish_break_stmt PROTO((void));
extern void finish_continue_stmt PROTO((void));
extern void begin_switch_stmt PROTO((void));
extern tree finish_switch_cond PROTO((tree));
extern tree begin_switch_stmt PROTO((void));
extern void finish_switch_cond PROTO((tree, tree));
extern void finish_switch_stmt PROTO((tree, tree));
extern void finish_case_label PROTO((tree, tree));
extern void finish_goto_stmt PROTO((tree));

4
gcc/cp/parse.c
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@ -7623,11 +7623,11 @@ case 738:
break;}
case 739:
#line 3277 "parse.y"
{ begin_switch_stmt (); ;
{ yyval.ttype = begin_switch_stmt (); ;
break;}
case 740:
#line 3279 "parse.y"
{ yyval.ttype = finish_switch_cond (yyvsp[-1].ttype); ;
{ finish_switch_cond (yyvsp[-1].ttype, yyvsp[-3].ttype); ;
break;}
case 741:
#line 3281 "parse.y"

4
gcc/cp/parse.y
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@ -3274,9 +3274,9 @@ simple_stmt:
already_scoped_stmt
{ finish_for_stmt ($9, $<ttype>2); }
| SWITCH
{ begin_switch_stmt (); }
{ $<ttype>$ = begin_switch_stmt (); }
'(' condition ')'
{ $<ttype>$ = finish_switch_cond ($4); }
{ finish_switch_cond ($4, $<ttype>2); }
implicitly_scoped_stmt
{ finish_switch_stmt ($4, $<ttype>6); }
| CASE expr_no_commas ':'

4
gcc/cp/pt.c
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@ -7392,9 +7392,9 @@ tsubst_expr (t, args, complain, in_decl)
tree val;
lineno = STMT_LINENO (t);
begin_switch_stmt ();
stmt = begin_switch_stmt ();
val = tsubst_expr (SWITCH_COND (t), args, complain, in_decl);
stmt = finish_switch_cond (val);
finish_switch_cond (val, stmt);
tsubst_expr (SWITCH_BODY (t), args, complain, in_decl);
finish_switch_stmt (val, stmt);
}

95
gcc/cp/semantics.c
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@ -44,6 +44,7 @@
static void expand_stmts PROTO((tree));
static void do_pushlevel PROTO((void));
static tree do_poplevel PROTO((void));
static tree expand_cond PROTO((tree));
/* When parsing a template, LAST_TREE contains the last statement
parsed. These are chained together through the TREE_CHAIN field,
@ -64,6 +65,16 @@ static tree do_poplevel PROTO((void));
#define RECHAIN_STMTS_FROM_CHAIN(stmt, substmt) \
RECHAIN_STMTS (stmt, substmt, TREE_CHAIN (stmt))
/* Finish processing the COND, the SUBSTMT condition for STMT. */
#define FINISH_COND(cond, stmt, substmt) \
do { \
if (last_tree != stmt) \
RECHAIN_STMTS_FROM_LAST (stmt, substmt); \
else \
substmt = cond; \
} while (0)
/* Finish an expression-statement, whose EXPRESSION is as indicated. */
void
@ -492,49 +503,51 @@ finish_continue_stmt ()
cp_error ("continue statement not within a loop");
}
/* Begin a switch-statement. */
void
begin_switch_stmt ()
{
do_pushlevel ();
}
/* Finish the cond of a switch-statement. Returns a new
SWITCH_STMT if appropriate. */
/* Begin a switch-statement. Returns a new SWITCH_STMT if
appropriate. */
tree
finish_switch_cond (cond)
tree cond;
begin_switch_stmt ()
{
tree r;
if (building_stmt_tree ())
{
r = build_min_nt (SWITCH_STMT, cond, NULL_TREE);
r = build_min_nt (SWITCH_STMT, NULL_TREE, NULL_TREE);
add_tree (r);
}
else
r = NULL_TREE;
do_pushlevel ();
return r;
}
/* Finish the cond of a switch-statement. */
void
finish_switch_cond (cond, switch_stmt)
tree cond;
tree switch_stmt;
{
if (building_stmt_tree ())
FINISH_COND (cond, switch_stmt, SWITCH_COND (switch_stmt));
else if (cond != error_mark_node)
{
emit_line_note (input_filename, lineno);
c_expand_start_case (cond);
r = NULL_TREE;
}
else
{
/* The code is in error, but we don't want expand_end_case to
crash. */
c_expand_start_case (boolean_false_node);
r = NULL_TREE;
}
/* The code is in error, but we don't want expand_end_case to
crash. */
c_expand_start_case (boolean_false_node);
push_switch ();
/* Don't let the tree nodes for COND be discarded by
clear_momentary during the parsing of the next stmt. */
push_momentary ();
return r;
}
/* Finish the body of a switch-statement, which may be given by
@ -1963,6 +1976,24 @@ finish_stmt_tree (fn)
DECL_SAVED_TREE (fn) = TREE_CHAIN (DECL_SAVED_TREE (fn));
}
/* Some statements, like for-statements or if-statements, require a
condition. This condition can be a declaration. If T is such a
declaration it is processed, and an expression appropriate to use
as the condition is returned. Otherwise, T itself is returned. */
static tree
expand_cond (t)
tree t;
{
if (t && TREE_CODE (t) == DECL_STMT)
{
expand_stmt (t);
return convert_from_reference (DECL_STMT_DECL (t));
}
else
return t;
}
/* Generate RTL for the chain of statements T. */
static void
@ -2038,7 +2069,7 @@ expand_stmt (t)
for (tmp = FOR_INIT_STMT (t); tmp; tmp = TREE_CHAIN (tmp))
expand_stmt (tmp);
finish_for_init_stmt (NULL_TREE);
finish_for_cond (FOR_COND (t), NULL_TREE);
finish_for_cond (expand_cond (FOR_COND (t)), NULL_TREE);
tmp = FOR_EXPR (t);
finish_for_expr (tmp, NULL_TREE);
expand_stmt (FOR_BODY (t));
@ -2050,7 +2081,7 @@ expand_stmt (t)
{
lineno = STMT_LINENO (t);
begin_while_stmt ();
finish_while_stmt_cond (WHILE_COND (t), NULL_TREE);
finish_while_stmt_cond (expand_cond (WHILE_COND (t)), NULL_TREE);
expand_stmt (WHILE_BODY (t));
finish_while_stmt (NULL_TREE);
}
@ -2069,7 +2100,7 @@ expand_stmt (t)
case IF_STMT:
lineno = STMT_LINENO (t);
begin_if_stmt ();
finish_if_stmt_cond (IF_COND (t), NULL_TREE);
finish_if_stmt_cond (expand_cond (IF_COND (t)), NULL_TREE);
if (THEN_CLAUSE (t))
{
expand_stmt (THEN_CLAUSE (t));
@ -2102,12 +2133,16 @@ expand_stmt (t)
break;
case SWITCH_STMT:
lineno = STMT_LINENO (t);
begin_switch_stmt ();
finish_switch_cond (SWITCH_COND (t));
if (TREE_OPERAND (t, 1))
{
tree cond;
lineno = STMT_LINENO (t);
begin_switch_stmt ();
cond = expand_cond (SWITCH_COND (t));
finish_switch_cond (cond, NULL_TREE);
expand_stmt (SWITCH_BODY (t));
finish_switch_stmt (SWITCH_COND (t), NULL_TREE);
finish_switch_stmt (cond, NULL_TREE);
}
break;
case CASE_LABEL:

15
gcc/testsuite/g++.old-deja/g++.pt/switch1.C Normal file
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@ -0,0 +1,15 @@
// Build don't link:
// Origin: Mark Mitchell <mark@codesourcery.com>
template <class T>
void f ()
{
int i;
switch (int i = 3) {
}
}
template void f<int>();