-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
+/*
+ * Project: libFIRM
+ * File name: testprograms/if_example.c
+ * Purpose: Shows construction of if.
+ * 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 "irdump.h"
-# include "firm.h"
+#include <stdio.h>
+#include <string.h>
+
+
+
+#include <libfirm/firm.h>
/**
-*** This file constructs the ir for the following pseudo-program:
-***
-*** Doesn't work for some reason!!!!
-***
-*** int main(int a) {
-*** int b = 2;
-*** if ( a == b )
-*** { a := a - 2; }
-***
-*** return a;
-*** }
+* This file constructs the ir for the following pseudo-program:
+*
+* int main(int a) {
+* int b = 2;
+* if ( a == b )
+* { a := a - 3; }
+*
+* return a;
+* }
**/
int
main(void)
{
ir_graph *irg;
- type *owner;
- entity *ent;
- type *proc_main; /* type information for the method main */
- type *typ;
+ ir_type *owner;
+ ir_entity *ent;
+ ir_type *proc_main; /* ir_type information for the method main */
+ ir_type *typ;
ir_node *x, *r, *t, *f, *a, *cmp;
int a_pos, b_pos;
printf("\nCreating an IR graph: IF_EXAMPLE...\n");
- init_firm ();
+ init_firm(NULL);
#define CLASSNAME "IF_EXAMPLE"
-#define METHODNAME "main"
+#define METHODNAME "IF_EXAMPLE_main"
#define NRARGS 1
#define NRES 1
+ /** Type information for the procedure **/
+
owner = get_glob_type();
- proc_main = new_type_method(id_from_str(METHODNAME, strlen(METHODNAME)),
+ /* Type information for the procedure */
+ proc_main = new_type_method(new_id_from_chars(METHODNAME, strlen(METHODNAME)),
NRARGS, NRES);
- ent = new_entity (owner,
- id_from_str (METHODNAME, strlen(METHODNAME)),
- proc_main);
-
-#define RES_NAME "int"
- typ = new_type_primitive(id_from_str(RES_NAME, strlen(RES_NAME)), mode_i);
+ /* The ir_entity for the procedure */
+ ent = new_entity(owner,
+ new_id_from_chars(METHODNAME, strlen(METHODNAME)),
+ proc_main);
+ /* The ir_type int. This ir_type is necessary to model the result and parameters
+ the procedure. */
+#define PRIM_NAME "int"
+ typ = new_type_primitive(new_id_from_chars(PRIM_NAME, strlen(PRIM_NAME)), mode_Is);
+ /* The parameter and result types of the procedure. */
set_method_param_type(proc_main, 0, typ);
set_method_res_type(proc_main, 0, typ);
- /* Generates start and end blocks and nodes and a first, initial block */
- irg = new_ir_graph (ent, 2);
+ /** The code of the procedure **/
- /* The value position used for a: */
+ /* Generates start and end blocks and nodes, and a first, initial block */
+#define NRLOCS 2
+ irg = new_ir_graph(ent, NRLOCS);
+
+ /* The value position used for: */
a_pos = 0;
b_pos = 1;
- /* Generate the constant */
- set_value (a_pos, new_Proj (get_irg_args(irg), mode_i, 0));
- /*set_value (a_pos, new_Const (mode_i, tarval_from_long (mode_i, 0)));*/
- set_value (b_pos, new_Const (mode_i, tarval_from_long (mode_i, 2)));
- mature_block (get_irg_current_block(irg));
+ /* Get the procedure parameter and assign it to the parameter variable
+ a. */
+ set_value(a_pos, new_Proj(get_irg_args(irg), mode_Is, 0));
+ /* Generate the constant and assign it to b. The assignment is resovled to a
+ dataflow edge. */
+ set_value(b_pos, new_Const(mode_Is, new_tarval_from_long(2, mode_Is)));
+ /* We know all predecessors of the block and all set_values and set_stores are
+ preformed. We can mature the block. */
+ mature_immBlock(get_irg_current_block(irg));
/* Generate a conditional branch */
- cmp = new_Cmp(get_value(a_pos, mode_i), get_value(b_pos, mode_i));
- x = new_Cond (new_Proj(cmp, mode_b, Eq));
- f = new_Proj (x, mode_X, 0);
- t = new_Proj (x, mode_X, 1);
+ cmp = new_Cmp(get_value(a_pos, mode_Is), get_value(b_pos, mode_Is));
+ x = new_Cond(new_Proj(cmp, mode_b, pn_Cmp_Eq));
+ f = new_Proj(x, mode_X, pn_Cond_false);
+ t = new_Proj(x, mode_X, pn_Cond_true);
/* generate and fill the then block */
- r = new_immBlock ();
- add_in_edge (r, t);
- a = new_Sub(get_value(a_pos, mode_i),
- new_Const (mode_i, tarval_from_long (mode_i, 2)),
- mode_i);
- set_value (a_pos, a);
+ r = new_immBlock();
+ add_immBlock_pred(r, t);
+ {
+ ir_node *b,*c;
+ c = new_Const(mode_Is, new_tarval_from_long(3, mode_Is));
+ b = get_value(a_pos, mode_Is);
+ a = new_Sub(b,
+ c,
+ mode_Is);
+ }
+ set_value(a_pos, a);
- mature_block (r);
- x = new_Jmp ();
+ mature_immBlock(r);
+ x = new_Jmp();
/* generate the fall through block and add all cfg edges */
- r = new_immBlock ();
- add_in_edge (r, f);
- add_in_edge (r, x);
- mature_block (r);
+ r = new_immBlock();
+ add_immBlock_pred(r, f);
+ add_immBlock_pred(r, x);
+ mature_immBlock(r);
+ /* The Return statement */
{
ir_node *in[1], *store ;
- in[0] = get_value (a_pos, mode_i);
+ in[0] = get_value(a_pos, mode_Is);
store = get_store();
- x = new_Return (store, 1, in);
+ x = new_Return(store, 1, in);
}
/* finalize the end block generated in new_ir_graph() */
- add_in_edge (get_irg_end_block(irg), x);
- mature_block (get_irg_end_block(irg));
-
-
- printf("Optimizing ...\n");
- local_optimize_graph(irg);
- dead_node_elimination(irg);
+ add_immBlock_pred(get_irg_end_block(irg), x);
+ mature_immBlock(get_irg_end_block(irg));
/* verify the graph */
irg_vrfy(irg);
+ irg_finalize_cons(irg);
/* output the vcg file */
printf("Done building the graph. Dumping it.\n");
- dump_ir_block_graph (irg);
- printf("use xvcg to view this graph:\n");
- printf("/ben/goetz/bin/xvcg GRAPHNAME\n\n");
+ dump_ir_block_graph(irg, 0);
+ printf("Use ycomp to view this graph:\n");
+ printf("ycomp GRAPHNAME\n\n");
- return (0);
+ return 0;
}
projects / libfirm / blobdiff