/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
+* All rights reserved.
+*
+* Authors: Christian Schaefer, Goetz Lindenmaier
+*
+* testprogram.
*/
+# 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:
-***
-*** 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
#define NRARGS 1
#define NRES 1
+ /** Type information for the procedure **/
+
owner = get_glob_type();
+ /* Type information for the procedure */
proc_main = new_type_method(id_from_str(METHODNAME, strlen(METHODNAME)),
NRARGS, NRES);
+ /* The entity for the procedure */
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 type int. This type is necessary to model the result and parameters
+ the procedure. */
+#define PRIM_NAME "int"
+ typ = new_type_primitive(id_from_str(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)));
+ /* 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, tarval_from_long (mode_Is, 2)));
+ /* We know all predecessors of the block and all set_values and set_stores are
+ preformed. We can mature the block. */
mature_block (get_irg_current_block(irg));
/* Generate a conditional branch */
- cmp = new_Cmp(get_value(a_pos, mode_i), get_value(b_pos, mode_i));
+ cmp = new_Cmp(get_value(a_pos, mode_Is), get_value(b_pos, mode_Is));
x = new_Cond (new_Proj(cmp, mode_b, Eq));
f = new_Proj (x, mode_X, 0);
t = new_Proj (x, mode_X, 1);
/* 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);
+ a = new_Sub(get_value(a_pos, mode_Is),
+ new_Const (mode_Is, tarval_from_long (mode_Is, 3)),
+ mode_Is);
set_value (a_pos, a);
mature_block (r);
add_in_edge (r, f);
add_in_edge (r, x);
mature_block (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);
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);
-
/* verify the graph */
irg_vrfy(irg);
+ finalize_cons (irg);
/* output the vcg file */
printf("Done building the graph. Dumping it.\n");