-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
+/*
+ * Project: libFIRM
+ * File name: testprograms/if_else_example.c
+ * Purpose: Shows construction of if ... else control flow.
+ * Tests Phi construction.
+ * 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 "firm.h"
-# include "irdump.h"
-/*
- * das leere FIRM Programm
- */
+#include <libfirm/firm.h>
+
/**
-*** This file constructs the ir for the following pseudo-program:
-***
-*** main() {
-*** int a = 0;
-*** int b = 1;
-***
-*** if (a > 2)
-*** { a = b; }
-*** else
-*** { b = 2; }
-***
-*** return a, b;
-**/
-
-int main(int argc, char **argv)
+ * This file constructs the ir for the following pseudo-program:
+ *
+ * main() {
+ * int a = 0;
+ * int b = 1;
+ *
+ * if (a > 2)
+ * { a = b; }
+ * else
+ * { b = 2; }
+ *
+ * return a, b;
+ */
+
+int main(void)
{
- ir_graph *irg; /* this variable contains the irgraph */
- type_class *owner; /* the class in which this method is defined */
- type_method *method; /* the type of this method */
- entity *ent; /* represents this method as entity of owner */
- ir_node *x, *x_then, *x_else, *c0, *c1, *c2, *cmpGt, *f, *t, *b;
+ ir_type *prim_t_int;
+ ir_graph *irg; /* this variable contains the irgraph */
+ ir_type *owner; /* the class in which this method is defined */
+ ir_type *method; /* the ir_type of this method */
+ ir_entity *ent; /* represents this method as ir_entity of owner */
+ ir_node *x, *x_then, *x_else, *c0, *c1, *c2, *cmpGt, *f, *t, *b;
- printf("creating an IR graph: IF_ELSE_EXAMPLE...\n");
+ printf("\nCreating an IR graph: IF_ELSE_EXAMPLE...\n");
/* init library */
- init_firm ();
+ init_firm(NULL);
+
+ /*** Make basic ir_type information for primitive ir_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
* all functions as methods in this file.
* Therefore we define a class "IF_ELSE_EXAMPLE" with a method main as an
- * entity.
+ * ir_entity.
*/
-#define ENTITYNAME "main"
+#define ENTITYNAME "IF_ELSE_EXAMPLE_main"
owner = get_glob_type();
- method = new_type_method (id_from_str("main", 4), 0, 2);
- ent = new_entity ((type *)owner, id_from_str (ENTITYNAME,
- strlen(ENTITYNAME)), (type *)method);
+ method = new_type_method(new_id_from_chars(ENTITYNAME, strlen(ENTITYNAME)), 0, 2);
+ set_method_res_type(method, 0, prim_t_int);
+ set_method_res_type(method, 1, prim_t_int);
+
+ ent = new_entity(owner, new_id_from_chars(ENTITYNAME,
+ strlen(ENTITYNAME)), method);
- /* Generates the basic graph for the method represented by entity ent, that
+ /* Generates the basic graph for the method represented by ir_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.
*/
#define NUM_OF_LOCAL_VARS 2
- irg = new_ir_graph (ent, NUM_OF_LOCAL_VARS);
+ irg = new_ir_graph(ent, NUM_OF_LOCAL_VARS);
/* Generate two constants */
- c0 = new_Const (mode_i, tarval_from_long (mode_i, 0));
- c1 = new_Const (mode_i, tarval_from_long (mode_i, 1));
+ c0 = new_Const(mode_Is, new_tarval_from_long(0, mode_Is));
+ c1 = new_Const(mode_Is, new_tarval_from_long(1, mode_Is));
/* set a and b to constants */
- set_value (0, c0); /* this (0) is variable a */
- set_value (1, c1); /* this (1) is variable b */
+ set_value(0, c0); /* this (0) is variable a */
+ set_value(1, c1); /* this (1) is variable b */
/* the expression that evaluates the condition */
- 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);
+ 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);
/* the conditional branch */
- x = new_Cond (cmpGt);
- f = new_Proj (x, mode_X, 0); /* if condition is false */
- t = new_Proj (x, mode_X, 1); /* if condition is true */
+ x = new_Cond(cmpGt);
+ f = new_Proj(x, mode_X, pn_Cond_false); /* if condition is false */
+ t = new_Proj(x, mode_X, pn_Cond_true); /* 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, get_value(1, mode_i));
- mature_block (b);
- x_then = new_Jmp ();
+ b = new_immBlock();
+ add_immBlock_pred(b, t);
+ set_value(0, get_value(1, mode_Is));
+ mature_immBlock(b);
+ x_then = new_Jmp();
/* generate and fill the else block */
- b = new_Block ();
- add_in_edge (b, f);
- set_value (1, new_Const (mode_i, tarval_from_long (mode_i, 2)));
- mature_block (b);
- x_else = new_Jmp ();
+ b = new_immBlock();
+ add_immBlock_pred(b, f);
+ set_value(1, new_Const(mode_Is, new_tarval_from_long(2, mode_Is)));
+ mature_immBlock(b);
+ x_else = new_Jmp();
/* generate the join block and add all cfg edges */
- b = new_Block ();
- add_in_edge (b, x_then);
- add_in_edge (b, x_else);
+ b = new_immBlock();
+ add_immBlock_pred(b, x_then);
+ add_immBlock_pred(b, x_else);
/* Generate the return node into current region. */
{
ir_node *in[2]; /* this is the array containing the return parameters */
- in[0] = get_value(0, mode_i);
- in[1] = get_value(1, mode_i);
- x = new_Return (get_store(), 2, in);
- DDMSG;
+ in[0] = get_value(0, mode_Is);
+ in[1] = get_value(1, mode_Is);
+ x = new_Return(get_store(), 2, 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));
- DDMSG;
/* This adds the in edge of the end block which originates at the
return statement. The return node passes control flow 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));
- printf("\nDone building the graph. Dumping it.\n");
-
- /* verify the graph */
- irg_vrfy(irg);
+ irg_finalize_cons(irg);
+ printf("Optimizing ...\n");
+ local_optimize_graph(irg);
dead_node_elimination(irg);
- dump_ir_block_graph (irg);
+ /* verify the graph */
+ irg_vrfy(irg);
+ irg_finalize_cons(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 ycomp to view this graph:\n");
+ printf("ycomp GRAPHNAME\n\n");
- return (0);
+ return 0;
}
projects / libfirm / blobdiff