-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
+/*
+ * Project: libFIRM
+ * File name: testprograms/cond_example.c
+ * Purpose: Shows how to represent boolean expressions.
+ * 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 <string.h>
+# include "irvrfy.h"
# include "irdump.h"
# include "firm.h"
/**
-*** This file constructs the ir for the following pseudo-program:
-***
-*** main(int a) {
-*** if ((a > 2) && (a < 10))
-*** { a = 1; }
-***
-*** return a;
+* This file constructs the ir for the following pseudo-program:
+*
+* main(int a) {
+* if ((a > 2) && (a < 10))
+* { a = 1; }
+*
+* return a;
**/
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 */
- entity *ent; /* represents this method as entity of owner */
- ir_node *x, *x_then, *arg1, *c2, *c10, *cmpGt, *cmpLt, *and, *f, *t, *b;
+ type *prim_t_int;
+ ir_graph *irg; /* this variable contains the irgraph */
+ type *owner; /* the class in which this method is defined */
+ type *method; /* the type of this method */
+ entity *ent; /* represents this method as entity of owner */
+ ir_node *x, *x_then, *arg1, *c2, *c10, *cmpGt, *cmpLt, *and, *f, *t, *b;
- printf("creating an IR graph: COND_EXAMPLE...\n");
+ printf("\nCreating an IR graph: COND_EXAMPLE...\n");
/* init library */
- init_firm ();
+ init_firm (NULL);
+
+ /*** Make basic type information for primitive type int. ***/
+ prim_t_int = new_type_primitive(new_id_from_chars ("int", 3), mode_Is);
/* 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
#define CLASSNAME "COND_EXAMPLE"
#define ENTITYNAME "main"
- owner = new_type_class (id_from_str (CLASSNAME, strlen(CLASSNAME)));
- ent = new_entity ((type *)owner, id_from_str (ENTITYNAME, strlen(ENTITYNAME)), NULL);
+ owner = new_type_class (new_id_from_chars (CLASSNAME, strlen(CLASSNAME)));
+ method = new_type_method (new_id_from_chars("main", 4), 1, 1);
+ set_method_param_type(method, 0, prim_t_int);
+ set_method_res_type(method, 0, prim_t_int);
+ ent = new_entity (owner, new_id_from_chars (ENTITYNAME, strlen(ENTITYNAME)), method);
+ get_entity_ld_name(ent);
/* Generates the basic graph for the method represented by entity ent, that
irg = new_ir_graph (ent, NUM_OF_LOCAL_VARS);
/* get the first argument a of method main - see irgraph.h */
- arg1 = new_Proj(irg->args, mode_i, 0);
+ arg1 = new_Proj(get_irg_args(irg), mode_Is, 0);
/* arg1 as first first local variable - makes things simple */
set_value(0, arg1);
/* the expression that evaluates the condition */
/* cmpGt = a > 2 */
- c2 = new_Const (mode_i, tarval_from_long (mode_i, 2));
- cmpGt = new_Proj(new_Cmp(get_value(0, mode_i), c2), mode_b, Gt);
- cmpGt = new_Conv(cmpGt, mode_i);
+ c2 = new_Const (mode_Is, new_tarval_from_long (2, mode_Is));
+ cmpGt = new_Proj(new_Cmp(get_value(0, mode_Is), c2), mode_b, pn_Cmp_Gt);
+ cmpGt = new_Conv(cmpGt, mode_Is);
/* cmpLt = a < 10 */
- c10 = new_Const (mode_i, tarval_from_long (mode_i, 10));
- cmpLt = new_Proj(new_Cmp(get_value(0, mode_i), c10), mode_b, Lt);
- cmpLt = new_Conv(cmpLt, mode_i);
+ c10 = new_Const (mode_Is, new_tarval_from_long (10, mode_Is));
+ cmpLt = new_Proj(new_Cmp(get_value(0, mode_Is), c10), mode_b, pn_Cmp_Lt);
+ cmpLt = new_Conv(cmpLt, mode_Is);
/* cmpGt && cmpLt */
- and = new_And(cmpGt, cmpLt, mode_i);
+ and = new_And(cmpGt, cmpLt, mode_Is);
/* compare result and 0 because we have no cast from integer to bool */
- and = new_Cmp(and, new_Const (mode_i, tarval_from_long (mode_i, 0)));
- and = new_Proj(and, mode_b, Ne);
+ and = new_Cmp(and, new_Const (mode_Is, new_tarval_from_long (0, mode_Is)));
+ and = new_Proj(and, mode_b, pn_Cmp_Lg);
/* the conditional branch */
x = new_Cond (and);
f = new_Proj (x, mode_X, 0); /* if condition is false */
t = new_Proj (x, mode_X, 1); /* if condition is true */
- mature_block (irg->current_block);
+ mature_immBlock (get_irg_current_block(irg));
/* generate and fill the then block */
- b = new_Block ();
- add_in_edge (b, t);
- set_value (0, new_Const (mode_i, tarval_from_long (mode_i, 1)));
- mature_block (b);
+ b = new_immBlock ();
+ add_immBlock_pred (b, t);
+ set_value (0, new_Const (mode_Is, new_tarval_from_long (1, mode_Is)));
+ mature_immBlock (b);
x_then = new_Jmp ();
/* generate the fall through block and add all cfg edges */
- b = new_Block ();
- add_in_edge (b, x_then);
- add_in_edge (b, f);
+ b = new_immBlock ();
+ add_immBlock_pred (b, x_then);
+ add_immBlock_pred (b, f);
/* Generate the return node into current region. */
{
ir_node *in[1]; /* this is the array containing the return parameters */
- in[0] = get_value(0, mode_i);
+ in[0] = get_value(0, mode_Is);
x = new_Return (get_store(), 1, in);
}
/* Now generate all instructions for this block and all its predecessor blocks
* so we can mature it. */
- mature_block (irg->current_block);
+ 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);
+ /* 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_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));
+
+ irg_finalize_cons (irg);
+
+ printf("Optimizing ...\n");
+ dead_node_elimination(irg);
/* verify the graph */
irg_vrfy(irg);
- printf("\nDone 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");
+ 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\n");
return (0);
}
projects / libfirm / blobdiff