-/* 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 <string.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;
+* 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)
{
+ 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, *x_else, *c0, *c1, *c2, *cmpGt, *f, *t, *b;
- printf("\ncreating 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 type information for primitive type int. ***/
+ prim_t_int = new_type_primitive(id_from_str ("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
* Therefore we define a class "IF_ELSE_EXAMPLE" with a method main as an
* 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);
+ method = new_type_method (id_from_str(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, id_from_str (ENTITYNAME,
strlen(ENTITYNAME)), method);
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 */
/* 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, Gt);
/* the conditional branch */
x = new_Cond (cmpGt);
/* generate and fill the then block */
b = new_immBlock ();
add_in_edge (b, t);
- set_value (0, get_value(1, mode_i));
+ set_value (0, get_value(1, mode_Is));
mature_block (b);
x_then = new_Jmp ();
/* generate and fill the else block */
b = new_immBlock ();
add_in_edge (b, f);
- set_value (1, new_Const (mode_i, tarval_from_long (mode_i, 2)));
+ set_value (1, new_Const (mode_Is, new_tarval_from_long (2, mode_Is)));
mature_block (b);
x_else = new_Jmp ();
/* 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);
+ 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
/* Now we can mature the end block as all it's predecessors are known. */
mature_block (get_irg_end_block(irg));
- printf("\nOptimizing ...\n");
+ finalize_cons (irg);
+
+ printf("Optimizing ...\n");
local_optimize_graph(irg);
dead_node_elimination(irg);