-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
+/*
+ * Project: libFIRM
+ * File name: testprograms/empty.c
+ * Purpose: The smallest possible firm graph.
+ * Author: Christian Schaefer, Goetz Lindenmaier
+ * Modified by:
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 1999-2003 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
+
-#include <stdio.h>
+# include <stdio.h>
+# include <string.h>
+# include "irvrfy.h"
# include "irdump.h"
# include "firm.h"
-/*
- * das leere FIRM Programm
- */
-
/**
-*** This file constructs the ir for the following pseudo-program:
-***
-*** main() {
-*** return;
-*** }
+* An empty Firm program.
+*
+* This file constructs the ir for the following pseudo-program:
+*
+* main() {
+* return;
+* }
+*
+*
**/
int main(int argc, char **argv)
{
- ir_graph *irg; /* this variable contains the irgraph */
- type_class *owner; /* the class in which this method is defined */
- type_method *proc_main; /* type information for the method main */
- entity *ent; /* represents this method as entity of owner */
- ir_node *x;
+ ir_graph *irg; /* this variable contains the irgraph */
+ type *owner; /* the class in which this method is defined */
+ type *proc_main; /* type information for the method main */
+ entity *ent; /* represents this method as entity of owner */
+ ir_node *x; /* to build control flow */
- printf("creating an IR graph: EMPTY...\n");
+ printf("\nCreating an IR graph: EMPTY...\n");
/* init library */
- init_firm ();
+ init_firm (NULL);
+
+ /** Build type information for the procedure. **/
/* FIRM was designed for oo languages where all methods belong to a class.
* For imperative languages like C we view a file as a large class containing
- * all functions as methods in this file.
- * (Therefore we define a class "empty" according to the file name
- * with a method main as an entity.)
- * This class now is automatically generated.
+ * all functions in this file as methods.
+ * This clas is generated automatically.
*/
-#define METHODNAME "main"
+ owner = get_glob_type();
+
+#define METHODNAME "EMPTY_main"
#define NRARGS 0
#define NRES 0
-
- owner = get_glob_type();
- proc_main = new_type_method(id_from_str(METHODNAME, strlen(METHODNAME)),
+ /* The type of the method */
+ proc_main = new_type_method(new_id_from_chars(METHODNAME, strlen(METHODNAME)),
NRARGS, NRES);
+ /* An entity representing the method. Owner of the entity is the global class
+ type mentioned above. */
ent = new_entity ((type *)owner,
- id_from_str (METHODNAME, strlen(METHODNAME)),
+ new_id_from_chars (METHODNAME, strlen(METHODNAME)),
(type *)proc_main);
+ /** Build code for the procedure. **/
+
/* Generates the basic graph for the method represented by entity ent, that
* is, generates start and end blocks and nodes and a first, initial block.
- * The constructor needs to know how many local variables the method has.
+ * The constructor needs to know the number of local variables (including
+ * the arguments) in the method.
*/
#define NUM_OF_LOCAL_VARS 0
-
irg = new_ir_graph (ent, NUM_OF_LOCAL_VARS);
-
/* The constructor new_ir_graph() generated a region to place nodes in.
* This region is accessible via the attribut current_block of irg and
* it is not matured.
* Generate the return node into this region. The Return node is needed to
- * return at least the store. */
- {
- ir_node *in[0]; /* this is the array containing the return parameters */
- x = new_Return (get_store(), 0, in);
- }
- /* Now generate all instructions for this block and all its predecessor blocks
- * so we can mature it. */
- mature_block (irg->current_block);
+ * return at least the memory. */
+ x = new_Return (get_store(), 0, NULL);
+ /* Now we generated all instructions for this block and all its predecessor
+ * blocks so we can mature it. (There are not too much.) */
+ mature_immBlock (get_irg_current_block(irg));
/* This adds the in edge of the end block which originates at the return statement.
* The return node passes controlflow to the end block. */
- add_in_edge (irg->end_block, x);
+ add_immBlock_pred (get_irg_end_block(irg), x);
/* Now we can mature the end block as all it's predecessors are known. */
- mature_block (irg->end_block);
+ mature_immBlock (get_irg_end_block(irg));
+
+ /* Verify the graph. Finds some very bad errors in the graph. */
+ irg_vrfy(irg);
+ irg_finalize_cons (irg);
- printf("\nDone building the graph. Dumping it.\n");
- dump_ir_block_graph (irg);
+ printf("Done building the graph. Dumping it.\n");
+ dump_ir_block_graph (irg, 0);
printf("use xvcg to view this graph:\n");
- printf("/ben/goetz/bin/xvcg GRAPHNAME\n");
+ printf("/ben/goetz/bin/xvcg GRAPHNAME\n\n");
return (0);
-
-
}
projects / libfirm / blobdiff