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expand.c
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expand.c
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/*
* Copyright (C) 1985-1992 New York University
*
* This file is part of the Ada/Ed-C system. See the Ada/Ed README file for
* warranty (none) and distribution info and also the GNU General Public
* License for more details.
*/
#define GEN
#include "hdr.h"
#include "libhdr.h"
#include "vars.h"
#include "gvars.h"
#include "attr.h"
#include "slot.h"
#include "segment.h"
#include "setprots.h"
#include "langprots.h"
#include "initprots.h"
#include "initobjprots.h"
#include "dbxprots.h"
#include "miscprots.h"
#include "utilprots.h"
#include "glibprots.h"
#include "readprots.h"
#include "libprots.h"
#include "arithprots.h"
#include "librprots.h"
#include "gnodesprots.h"
#include "gmiscprots.h"
#include "gutilprots.h"
#include "aggrprots.h"
#include "chapprots.h"
#include "smiscprots.h"
#include "gmainprots.h"
#include "expandprots.h"
void expand(Node node) /*;expand*/
{
/*
* Expander
* Performs a set of semantic transformations on the tree
* in order to simplify the job for the code generator.
* Some semantic optimizations are performed too.
* IMPORTANT:
* expand must not be called twice on the same structure, as
* for some kinds of nodes, the format before expand is
* different from the format after expand. A special problem
* arises for aggregates, where already expanded structures
* (subaggregates) are part of a not yet expanded structure
* (assignment to enclosing structure) that must be expanded.
* a special node, as_expanded, is used to block double
* expansion in that case.
*/
Fortup ft1, ft2;
Tuple tup, tup1, tup2;
Symbolmap instance_map, type_map;
Node node1, node2, node3, node4;
Symbol sym1, sym2, sym3, sym4;
int nk, cboolean;
Const lv;
Unitdecl ud;
/* TBSL remove the following declarations */
Const lbd_1, ubd_1, lbd_2, ubd_2;
int ubd_1_val, ubd_2_val, lbd_1_val, lbd_2_val;
Tuple instantiation_code, ntup ;
#ifdef TRACE
if (debug_flag)
gen_trace_node("EXPAND", node);
#endif
#ifdef DEBUG
if (trapns>0 && N_SEQ(node)== trapns && N_UNIT(node) == trapnu) trapn(node);
#endif
switch N_KIND(node) {
case(as_insert):
N_SIDE(node) = FALSE;
FORTUP(node1 = (Node), N_LIST(node), ft1);
expand(node1);
N_SIDE(node) |= N_SIDE(node1);
ENDFORTUP(ft1);
node1 = N_AST1(node);
expand(node1);
N_SIDE(node) |= N_SIDE(node1);
break;
/* Chapter 3. Declarations and types*/
/*
*-----------------
* 3.1 Declarations
*/
case(as_declarations):
N_SIDE(node) = FALSE;
if (N_LIST(node) == (Tuple)0)
chaos("expand.c: as_declarations N_LIST null");
FORTUP(node1 = (Node), N_LIST(node), ft1);
expand(node1);
N_SIDE(node) |= N_SIDE(node1);
ENDFORTUP(ft1);
break;
/*
*------------------------------
* 3.2 Objects and named numbers
*/
case(as_obj_decl):
case(as_const_decl):
expand_decl(node);
break;
/*
*-----------------------
* 3.3 Types and subtypes
* 3.3.1
*/
case(as_type_decl):
expand_type(node);
break;
/* 3.3.2 */
case(as_subtype_decl):
expand_subtype(node);
break;
case(as_delayed_type):
sym1 = N_UNQ(N_AST1(node)); /* type name */
sym2 = N_UNQ(N_AST2(node)); /* parent name */
node1 = copy_node(node); /* delayed node */
if (NATURE(sym1) == na_subtype)
N_KIND(node1) = as_subtype_decl;
else
N_KIND(node1) = as_type_decl;
nk = emap_get(sym2);
tup = EMAP_VALUE;
if (!nk) /* emap_defined */
tup = tup_new1((char *) node1);
else
tup = tup_with(tup, (char *)node1);
/* EMAP(sym2) = (EMAP(sym2)?[]) with node1;*/
emap_put(sym2, (char *) tup);
delete_node(node);
break;
case(as_subtype_indic):
sym1 = N_UNQ(N_AST1(node)); /* type name */
N_SIDE(node) = (unsigned)CONTAINS_TASK(sym1);
node2 = N_AST2(node); /* expression */
expand(node2);
N_SIDE(node) |= N_SIDE(node2);
break;
/*
*-----------------
* 3.5 Scalar types
*/
case(as_digits):
expand(N_AST1(node)); /* precision node */
node2 = N_AST2(node); /* range node */
expand(node2);
N_SIDE(node) = N_SIDE(node2);
break;
case(as_delta):
expand(N_AST1(node)); /* precision node */
node2 = N_AST2(node); /* range node */
expand(node2);
N_SIDE(node) = N_SIDE(node2);
break;
case(as_subtype):
node2 = N_AST2(node);
expand(node2);
N_SIDE(node) = N_SIDE(node2);
/* Transmit tasks_declared: */
sym1 = N_UNQ(N_AST1(node)); /* type name */
/* N_TYPE(node) is parent type */
CONTAINS_TASK(sym1) = CONTAINS_TASK(N_TYPE(node));
break;
case(as_component_list):
node1 = N_AST1(node); /* invariant node */
FORTUP(node2 = (Node), N_LIST(node1), ft1);
expand(node2); /* field node */
ENDFORTUP(ft1);
expand(N_AST2(node)); /* variant node */
N_SIDE(node) = FALSE;
break;
case(as_simple_choice):
node1 = N_AST1(node); /* expression */
expand(node1);
N_SIDE(node) = N_SIDE(node1);
break;
case(as_incomplete_decl):
sym1 = N_UNQ(N_AST1(node)); /* type name */
CONTAINS_TASK(sym1) = (char *) TRUE; /* May be. Future will tell */
delete_node(node);
break;
/*
* Chapter 4. Names and expressions
*
*----------
* 4.1 Names
*/
case(as_range_choice):
node1 = N_AST1(node);
if (N_KIND(node1) == as_attribute) {
/* must be range. */
sym1 = N_TYPE(node1);
nk = (int)attribute_kind(node1) - ATTR_RANGE; /* 'T' or 'O'*/
attribute_kind(node1) = (char *) (nk + ATTR_FIRST);
N_AST2(node) = new_attribute_node(nk + ATTR_LAST,
N_AST2(node1), N_AST3(node1), sym1);
N_KIND(node) = as_range;
N_TYPE(node) = sym1;
expand(node);
}
else {
node2 = N_AST2(node1);
expand(node2);
N_SIDE(node) = N_SIDE(node2);
}
break;
case(as_range):
node1 = N_AST1(node); /* expression */
node2 = N_AST2(node); /* expression */
expand(node1);
expand(node2);
N_SIDE(node) = N_SIDE(node1) | N_SIDE(node2);
break;
case(as_constraint):
N_SIDE(node) = FALSE;
FORTUP(node1 = (Node), N_LIST(node), ft1);
if (N_KIND(node1) == as_choice_list) {
/* named discriminant constraints. Only need expression. */
node1 = N_AST2(node1) ;
}
expand(node1);
N_SIDE(node) |= N_SIDE(node1);
ENDFORTUP(ft1);
break;
case(as_index):
node1 = N_AST1(node) ; /* array node */
expand(node1);
N_SIDE(node) = N_SIDE(node1);
/* N_AST2(node) is a list of indices */
FORTUP(node2 = (Node), N_LIST(N_AST2(node)), ft1);
expand(node2); /* index */
N_SIDE(node) |= N_SIDE(node2);
ENDFORTUP(ft1);
break;
/*
* 4.1.2
*/
case(as_slice):
node2 = N_AST2(node) ; /* range node */
if (N_KIND(node2) == as_subtype) {
/* remove subtype */
node1 = N_AST2(node2); /* id node */
copy_attributes(node1, node2);
}
if (is_simple_name(node2)) {
/* type name replaced by range attribute */
/* SETL has OPT_NODE as third arg in next call. This is
* wrong - want to indicate first dimension.
* ds 9-8-85
*/
node2 = new_attribute_node(ATTR_T_RANGE, node2,
new_ivalue_node(int_const(1), symbol_integer), N_UNQ(node2));
N_AST2(node) = node2 ;
}
node1 = N_AST1(node) ; /* array node */
expand(node1);
N_SIDE(node) = N_SIDE(node1);
expand(node2); /* range node */
N_SIDE(node) |= N_SIDE(node2);
break;
case(as_field):
node2 = N_AST2(node) ; /* expression */
expand(node2);
N_SIDE(node) = N_SIDE(node2);
break;
case(as_selector):
case(as_all):
node1 = N_AST1(node) ; /* expression */
expand(node1);
N_SIDE(node) = N_SIDE(node1);
break;
/*
* 4.1.4
*/
case(as_attribute):
case(as_range_attribute):
expand_attr(node);
break;
/*
*-------------
* 4.2 Literals
*/
case(as_string_ivalue):
expand_string(node);
break;
case(as_int_literal):
/* TBSL(JC) This is a kludge */
N_KIND(node) = as_ivalue;
lv = adaval(symbol_integer, N_VAL(node));
if (adaval_overflow)
chaos("unable to convert integer literal");
else
N_VAL(node) = (char *) lv;
N_SIDE(node) = FALSE;
break;
/*
*---------------
* 4.3 Aggregates
*/
case(as_array_aggregate):
#ifdef DEFER
/* N_LIST assignmentnot needed in packed version DS 3-86 */
N_LIST(node) = (Tuple)0; /* Useless information removed */
#endif
expand_array_aggregate(node) ;
N_SIDE(node) = N_KIND(node) != as_array_ivalue;
/* TBSL better N_SIDE */
break;
case(as_row):
node1 = N_AST1(node); /* expression */
if (is_ivalue(node1) && root_type(N_TYPE(node1)) == symbol_character) {
/* Transform into string litteral */
/* Clear current AST_3 and AST_4 only if defined, thus preserving
* any N_UNQ and N_TYPE values if these are defined for the node.
*/
if (N_AST3_DEFINED(N_KIND(node))) N_AST3(node) = (Node) 0;
if (N_AST4_DEFINED(N_KIND(node))) N_AST4(node) = (Node) 0;
N_KIND(node) = as_string_ivalue;
N_AST1(node) = (Node)0;
N_AST2(node) = (Node)0;
/* TBSL: check translation of following carefully */
N_VAL(node) = (char *) tup_new1((char *) get_ivalue_int(node1));
}
else {
/* Transform into an aggregate */
N_KIND(node) = as_array_aggregate;
/* positionnal */
node3 = node_new(as_aggregate_list);
node2 = node_new(as_list); /* positionnal */
N_LIST(node2) = tup_new1((char *) node1);
N_AST1(node3) = node2 ;
/* named */
node2 = node_new(as_list); /* named */
N_LIST(node2) = tup_new(0);
N_AST2(node3) = node2 ;
N_AST1(node) = node3;
N_AST2(node) = OPT_NODE ;
N_UNQ (node) = new_unique_name("row");
}
expand(node);
break;
case(as_record_aggregate):
expand_record_aggregate(node);
N_SIDE(node) = N_KIND(node) != as_record_ivalue;
/* TBSL better N_SIDE */
break;
/*
*----------------
* 4.4 Expressions
*/
/*
*----------------------------------------
* 4.5 Operators and expression evaluation
*/
case(as_op):
expand_op(node);
break;
case(as_un_op):
node2 = N_AST2(node) ; /* arguments */
node1 = (Node) ((Tuple) N_LIST(node2)[1]);
expand(node1);
N_SIDE(node) = N_SIDE(node1);
break;
/*
*---------------------
* 4.6 Type conversions
*/
case(as_qual_range):
case(as_qual_discr):
case(as_qual_sub):
node1 = N_AST1(node) ; /* expression */
expand(node1);
/* Note: must expand before checking types, as actual subtype of */
/* aggregates may be determined by expansion. */
sym1 = N_TYPE(node); /* qualification type */
if (sym1 == get_type(node1) || is_unconstrained(sym1)) {
/* remove qual */
copy_attributes(node1, node);
}
else {
N_SIDE(node) = N_SIDE(node1);
}
break;
case(as_qual_index):
node1 = N_AST1(node); /* expression */
expand(node1);
sym1 = N_TYPE(node); /* qualification type */
sym2 = get_type(node1);
if (sym1 == sym2 || is_unconstrained(sym1)) {
/* remove qual */
copy_attributes(node1, node);
}
else {
/* tup_copy needed since index_types tuple used here
* destructiely ds 6-25-85
*/
/* TBSL (JC) no copy needed. use FORTUPI */
tup1 = tup_copy(index_types(sym1));
tup2 = tup_copy(index_types(sym2));
cboolean = TRUE;
while (tup_size(tup1)) {
sym3 = (Symbol) tup_fromb(tup1);
sym4 = (Symbol) tup_fromb(tup2);
node2 = (Node) ((Tuple) SIGNATURE(sym3)[2]); /* lower bound */
node3 = (Node) ((Tuple) SIGNATURE(sym3)[3]); /* upper bound */
lbd_1 = get_ivalue(node2);
ubd_1 = get_ivalue(node3);
node2 = (Node) ((Tuple) SIGNATURE(sym4)[2]); /* lower bound */
node3 = (Node) ((Tuple) SIGNATURE(sym4)[3]); /* upper bound */
lbd_2 = get_ivalue(node2);
ubd_2 = get_ivalue(node3);
if (N_KIND(node1) != as_slice && !is_unconstrained(sym2)
&& lbd_1->const_kind != CONST_OM
&& ubd_1->const_kind != CONST_OM
&& lbd_2->const_kind != CONST_OM
&& ubd_2->const_kind != CONST_OM) {
lbd_1_val = INTV(lbd_1);
ubd_1_val = INTV(ubd_1);
lbd_2_val = INTV(lbd_2);
ubd_2_val = INTV(ubd_2);
if ((ubd_1_val - lbd_1_val) != (ubd_2_val - lbd_2_val)) {
make_raise_node(node, symbol_constraint_error);
USER_WARNING("Evaluation of expression will raise",
" CONSTRAINT_ERROR");
cboolean = FALSE;
break;
}
if ((ubd_1_val != ubd_2_val) || (lbd_1_val != lbd_2_val)) {
cboolean = FALSE;
break;
}
}
else { /* non static */
cboolean = FALSE;
break;
}
} /* end loop */
if (cboolean) {
/* qual_index can be removed */
copy_attributes(node1, node);
N_TYPE(node) = sym1;
if (is_aggregate(node)) {
node2 = N_AST2(node); /* object node */
TYPE_OF(N_UNQ(node2)) = sym1;
}
else if (N_KIND(node)==as_insert && is_aggregate(N_AST1(node))){
node2 = N_AST2(N_AST1(node)); /* object node */
TYPE_OF(N_UNQ(node2)) = sym1;
}
}
else {
N_SIDE(node) = N_SIDE(node1);
}
}
break;
case(as_qual_aindex):
case(as_qual_alength):
case(as_qual_adiscr):
node1 = N_AST1(node) ; /* expression */
expand(node1);
if (N_KIND(node1) == as_null) {
/* remove qual */
copy_attributes(node1, node);
}
else {
N_SIDE(node) = N_SIDE(node1);
}
break;
case(as_convert):
/* The target type of the conversion is the type of the node */
/* The source type is the type of the expression itself. */
node2 = N_AST2(node) ; /* expression */
/* Special case: convert of a fixed point * or / */
if (N_KIND(node2) == as_op && (op_kind(node2) == symbol_mulfx
|| op_kind(node2) == symbol_divfx)) {
/* Bind result type to the operation and remove node */
N_TYPE(node2) = N_TYPE(node);
copy_attributes(node2, node);
expand(node);
}
else {
expand(node2);
N_SIDE(node) = N_SIDE(node2);
/* Remove unnecessary conversion */
if ((base_type(get_type(node2)) == base_type(N_TYPE(node))
&& !is_unconstrained(base_type(N_TYPE(node))))
|| ((root_type(get_type(node2)) == root_type(N_TYPE(node)))
&& (is_discrete_type (root_type (get_type (node2)))))) {
/*copy_attributes(node2, node); */
N_KIND (node) = as_qual_range;
N_AST1 (node) = N_AST2 (node);
}
}
break;
case(as_arg_convert):
/* The target type of the conversion is the type of the node
* The source type is the type of the expression itself.
* src_type = get_type(node2) ;
* target_type = N_TYPE(node);
*/
node2 = N_AST2(node) ; /* expression */
expand(node2);
N_SIDE(node) = N_SIDE(node2);
break;
/*
*---------------
* 4.8 Allocators
*/
case(as_new):
node1 = N_AST1(node) ; /* id node */
node2 = N_AST2(node) ; /* expression */
sym1 = N_UNQ(node1) ; /* allocated type */
/* N_TYPE(node) is the type of the context */
sym2 = (Symbol) designated_type(N_TYPE(node)); /* accessed type */
if (is_task_type(sym2)) {
node2 = new_create_task_node(sym2);
N_AST2(node) = node2 ;
}
else if ( is_access_type(sym2) && node2 == OPT_NODE) {
node2 = node_new(as_null);
N_AST2(node) = node2 ;
}
expand(node2);
if (!is_simple_name(node1)) {
/* There is a subtype to emit */
expand(node1);
make_insert_node(node, tup_new1((char *) node1), copy_node(node));
node = N_AST1(node);
}
else if ( is_unconstrained(sym1)) {
/* Establish proper subtype */
if (is_array_type(sym1)) {
/* Take constraint from initial value (always present in */
/* this case) */
sym1 = get_type(node2);
N_UNQ(node1) = sym1;
}
else if (node2 == OPT_NODE) { /* record */
/* Create a subtype, constrained by default values. (Default
* values always present in that case).
*/
sym1 = new_unique_name("constrained_type");
N_UNQ(node1) = sym1;
tup1 = constraint_new(co_discr);
tup = tup_new(0);
FORTUP(sym4 = (Symbol), discriminant_list_get(sym2), ft1);
/* An allocator is always constrained. Set the constrained
* bit accordingly
*/
if (sym4 == symbol_constrained)
tup = discr_map_put(tup, sym4,
new_ivalue_node(int_const(TRUE), symbol_boolean));
else
tup = discr_map_put(tup, sym4,
copy_tree((Node) default_expr(sym4)));
ENDFORTUP(ft1);
tup1[2] = (char *) tup;
new_symbol(sym1, na_subtype, sym2, tup1,
root_type(sym2));
node1 = new_subtype_decl_node(sym1);
expand(node1);
make_insert_node(node,tup_new1((char *)node1), copy_node(node));
node = N_AST1(node);
}
else if ( !is_unconstrained(get_type(node2))) {
/* Use expression subtype for allocated object */
sym3 = get_type(node2);
N_UNQ(node1) = sym3;
}
else {
/* Worst case: new REC'(F), where REC is unconstrained, and F
* returns REC. The subtype must be elaborated from the value
* of discriminants of the expression.
*/
sym3 = get_type(node2);
sym1 = new_unique_name("constrained_type");
N_UNQ(node1) = sym1;
/* tup1 = [co_discr, {} ];*/
tup1 = constraint_new(co_discr);
tup1[2] = (char *) tup_new(0);
new_symbol(sym1, na_subtype, sym2, tup1,
root_type(sym2));
CONTAINS_TASK(sym1) = CONTAINS_TASK(sym2);
node3 = node_new(as_type_and_value);
N_AST1(node3) = new_name_node(sym1) ;
N_AST2(node3) = node2 ;
N_TYPE(node3) = sym3;
N_AST1(node) = node1 ;
N_AST2(node) = node3 ;
if (N_AST3_DEFINED(N_KIND(node))) N_AST3(node) = (Node) 0;
if (N_AST4_DEFINED(N_KIND(node))) N_AST4(node) = (Node) 0;
}
}
sym3 = INIT_PROC(base_type(sym2));
if (node2 == OPT_NODE && sym3 != (Symbol)0) {
node2 = build_init_call(OPT_NODE, sym3, sym1, OPT_NODE);
expand(node2);
N_AST1(node) = node1 ;
N_AST2(node) = node2;
if (N_AST3_DEFINED(N_KIND(node))) N_AST3(node) = (Node) 0;
if (N_AST4_DEFINED(N_KIND(node))) N_AST4(node) = (Node) 0;
}
N_SIDE(node) = TRUE;
break;
/** Chapter 5. Statements */
case(as_null_s):
break;
case(as_line_no):
ada_line = (int) N_VAL(node);
N_SIDE(node) = FALSE;
#ifdef TRACE
if (debug_line>0 && ada_line >= debug_line) {
expand_line();
}
#endif
break;
/*
*-----------------------------------
* 5.1 Simple and compound statements
*/
case(as_statement):
/* This node is used only for labelled statements, in front */
/* of which labels are emitted. */
expand(N_AST2(node)) ;
break;
case(as_statements):
node1 = N_AST1(node) ; /* statements node */
/* Note that if cboolean is true, the statement is not reachable
* and therefore can be removed. TBSL: remove it from the list.
*/
cboolean = FALSE; /* first statement is always reachable */
FORTUP(node2 = (Node), N_LIST(node1), ft1);
if (N_KIND(node2) == as_statement)
cboolean = FALSE;
if (cboolean)
delete_node(node2);
else
expand(node2);
if ( N_KIND(node2) == as_raise
|| N_KIND(node2) == as_goto
|| N_KIND(node2) == as_return
|| N_KIND(node2) == as_end
|| N_KIND(node2) == as_terminate)
cboolean = TRUE;
ENDFORTUP(ft1);
break;
/*
*-------------------------
* 5.2 Assignment statement
*/
case(as_assignment):
expand(N_AST1(node)) ; /* variable node */
expand(N_AST2(node)) ; /* expression */
break;
/*
*------------------
* 5.3 If statement
*/
case(as_if):
node1 = N_AST1(node) ; /* if list node */
node2 = N_AST2(node) ; /* else part */
/* Remove branches guarded by static expressions */
/* (conditional compilation) */
tup = tup_new(0);
FORTUP(node3 = (Node), N_LIST(node1), ft1);
node4 = N_AST1(node3) ; /* condition */
expand(node4);
if (is_ivalue(node4)) {
if (get_ivalue_int(node4) == TRUE) {
/* This branch is guarded by TRUE: becomes the else part.
* All others branches are no longer reachable and
* may therefore be discarded.
*/
node2 = N_AST2(node3);
break;
}
/* else FALSE: skip this node */
}
else {
expand(N_AST2(node3));
tup = tup_with(tup, (char *) node3);
}
ENDFORTUP(ft1);
expand(node2); /* else part */
if (tup_size(tup) == 0) {
if (node2 == OPT_NODE)
delete_node(node);
else
copy_attributes(node2, node);
}
else {
N_LIST(node1) = tup;
N_AST1(node) = node1 ;
N_AST2(node) = node2 ;
}
break;
/*
*--------------------
* 5.4 Case statements
*/
case(as_case):
case(as_variant_decl):
expand(N_AST1(node)) ; /* expression */
tup1 = tup_copy(N_LIST(N_AST2(node))) ;
/* tup_copy needed since tup1 used destructively
* in tup_fromb below ds 6-25-85
*/
if (tup_size(tup1) == 1) {
/* Only one case... suppress case statement */
node1 = (Node) tup_fromb(tup1); /* case branch */
/* N_AST2(node1) is the list of statements for that branch */
copy_attributes(N_AST2(node1), node);
expand(node);
}
else {
FORTUP(node1 = (Node), tup1, ft1);
/* node1 is case node */
node2 = N_AST1(node1) ; /* list of choices */
expand(N_AST2(node1)) ; /* statements node */
FORTUP(node1 = (Node), N_LIST(node2), ft2);
/* in the inner loop node1 is choice node */
nk = N_KIND(node1);
if (nk == as_range_choice) {
node3 = N_AST1(node1); /* id node */
node4 = N_AST2(node3); /* range node */
N_AST1(node1) = N_AST1(node4);
N_AST2(node1) = N_AST2(node4);
N_AST3(node1) = N_AST3(node4);
N_AST4(node1) = N_AST4(node4);
N_KIND(node1) = as_range;
}
else if (nk == as_simple_name) {
sym1 = N_UNQ(node1); /* type name */
tup = (Tuple) get_constraint(sym1);
N_AST1(node1) = (Node) tup[2] ; /* lower bound */
N_AST2(node1) = (Node) tup[3] ; /* upper bound */
N_KIND(node1) = as_range;
}
else if (nk == as_simple_choice) {
node3 = N_AST1(node1); /* lower bound */
N_AST1(node1) = node3 ;
N_AST2(node1) = node3 ;
N_KIND(node1) = as_range;
}
else if (nk == as_others_choice || nk == as_range) {
;
}
else {
compiler_error_k(
"Unexpected choice in case statement: ", node1);
}
ENDFORTUP(ft2);
ENDFORTUP(ft1);
}
break;
/*
*--------------------
* 5.5 Loop statements
*/
case(as_loop):
node1 = N_AST1(node) ; /* id node */
node2 = N_AST2(node) ; /* iteration scheme */
if (node2 != OPT_NODE) {
expand(node2) ;
if (N_KIND(node2) == as_insert) {
propagate_insert(node2, node);
node = N_AST1(node);
}
}
nk = N_KIND(node2);
if (nk == as_deleted)
delete_node(node);
else if (nk == as_raise)
copy_attributes(node2, node);
else { /* normal case */
if (node1 != OPT_NODE) {
sym1 = N_UNQ(node1); /* loop name */
SIGNATURE(sym1) = (Tuple) FALSE;
}
expand(N_AST3(node)); /* statements */
if (node1 != OPT_NODE) {
/* Remove id node if not used */
sym1 = N_UNQ(node1);
if (is_generated_label(sym1) &&
SIGNATURE(sym1) == (Tuple) FALSE) {
N_AST1(node) = OPT_NODE ;
}
}
}
break;
case(as_while):
expand(N_AST1(node)); /* condition node */
break;
case(as_for):
case(as_forrev):
expand_for(node);
break;
/*
*---------------------
* 5.6 Block statements
*/
case(as_block):
node1 = N_AST1(node) ; /* id node */
/* N_AST2(node) declaration node */
/* N_AST3(node) statements node */
/* N_AST4(node) handler node */
if (is_simple_name(node1) && (N_UNQ(node1) == symbol_task_block)) {
node2 = node_new(as_terminate); /* terminal node */
tup = tup_new(2);
tup[1] = 0;
tup[2] = 0;
N_VAL(node2) = (char *) tup;
}
else {
node2 = node_new(as_end); /* terminal node */
}
expand_block(N_AST2(node), N_AST3(node), N_AST4(node), node2);
break;
case(as_end):
break;
/*
*--------------------
* 5.7 Exit statements
*/
case(as_exit):
expand(N_AST2(node)); /* condition node */
sym1 = N_UNQ(node); /* loop name */
SIGNATURE(sym1) = (Tuple) TRUE;
break;
/*
*----------------------
* 5.8 Return statements
*/
case(as_return):
node1 = N_AST1(node) ; /* expression */
if (node1 != OPT_NODE)
expand(node1);
break;
/*
*--------------------
* 5.9 Goto statements
*/
case(as_goto):
break;
/* Chapter 6. Subprograms */
/*
*---------------------------
* 6.0 Predefined subprograms
*/
case(as_predef):
sym1 = N_UNQ(node); /* procedure name */
sym2 = N_TYPE(node); /* type name */
tup = tup_new(2);
tup[1] = (char *) N_VAL(node);
/* integer mapped to the marker name */
tup[2] = (char *) sym2;
MISC(sym1) = (char *) tup;
N_SIDE(node) = FALSE;
break;
case(as_interfaced):
sym1 = N_UNQ(node); /* procedure name */
node1 = N_AST1(node);
tup = tup_new(2);
tup[1] = (char *) interface_counter++; /* integer mapped to the
interfaced subprogram */
/* the tuple interfaced_procedures consists of unit numbers of
* interfaced procedures followed by a string which contains
* the call to this interfaced procedure
*/
interfaced_procedures = tup_with(interfaced_procedures,
(char *) unit_number_now);
if (streq(N_VAL(node1), "C")) {
interfaced_procedures = tup_with(interfaced_procedures,
c_interface(sym1, (int) tup[1]));
}
else {
interfaced_procedures = tup_with(interfaced_procedures,
fortran_interface(sym1, (int) tup[1]));
}
MISC(sym1) = (char *) tup;
N_SIDE(node) = FALSE;
break;
/*
*----------------------
* 6.3 Subprogram bodies
*/
case(as_subprogram_tr):
/* N_AST1(node) statements */
/* N_AST2(node) declarations */
/* N_AST4(node) handler */
/* unique name of subprogram is now in the N_UNQ field of node. */
sym1 = N_UNQ(node) ; /* subprogram name */
if (NATURE(sym1) == na_procedure || NATURE(sym1) == na_procedure_spec) {
/* Terminal node = return; */
node2 = node_new(as_return);
N_AST1(node2) = OPT_NODE ;
N_AST2(node2) = new_name_node(sym1) ;
N_AST3(node2) = new_number_node(0); /* depth */
}
else if (NATURE(sym1) == na_function
|| NATURE(sym1) == na_function_spec) {
/* Terminal node = raise PROGRAM_ERROR */
node2 = new_raise_node(symbol_program_error);
}
else { /* Task */
node2 = node_new(as_terminate);
tup = tup_new(2);
tup[1] = 0;
tup[2] = 0;
N_VAL(node2) = (char *) tup;
}