-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
-
-# include "irdump.h"
-# include "firm.h"
+/*
+ * Project: libFIRM
+ * File name: testprograms/if_while_example.c
+ * Purpose: Shows more complex control flow.
+ * 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 <libfirm/firm.h>
/**
-*** This file constructs the ir for the following pseudo-program:
-***
-*** main() {
-*** int a = 0;
-*** int b = 1;
-***
-*** if (0 == 0)
-*** { a = 2; }
-***
-*** while (0 == 0) loop {
-*** h = a;
-*** a = b;
-*** b = h;
-*** }
-***
-*** return a-b;
+* This file constructs the ir for the following pseudo-program:
+*
+* main() {
+* int a = 0; // pos 0
+* int b = 1; // pos 1
+* int h; // pos 2
+*
+* if (0 == 0)
+* { a = 2; }
+*
+* while (0 == 0) loop {
+* h = a;
+* a = b;
+* b = h;
+* }
+*
+* return a-b;
+* }
**/
int
main(void)
{
ir_graph *irg;
- type_class *owner;
- entity *ent;
+ ir_type *owner;
+ ir_type *proc_main;
+ ir_type *prim_t_int;
+ ir_entity *ent;
ir_node *b, *x, *r, *t, *f;
- printf("creating an IR graph: IF_WHILE_EXAMPLE...\n");
+ printf("\nCreating an IR graph: IF_WHILE_EXAMPLE...\n");
+
+ init_firm (NULL);
+ turn_off_edge_labels();
+
+ set_optimize(1);
+ set_opt_constant_folding(0); /* so that the stupid tests are not optimized. */
+ /* if optimized no path to End remains!! */
+ set_opt_cse(1);
- init_firm ();
+ /*** Make basic ir_type information for primitive ir_type int. ***/
+ prim_t_int = new_type_primitive(new_id_from_chars ("int", 3), mode_Iu);
- owner = new_type_class (id_from_str ("IF_WHILE_EXAMPLE", 16));
- ent = new_entity ((type *)owner, id_from_str ("main", 4), NULL);
+#define METHODNAME "main"
+#define NRARGS 0
+#define NRES 1
+
+ proc_main = new_type_method(new_id_from_chars(METHODNAME, strlen(METHODNAME)),
+ NRARGS, NRES);
+ set_method_res_type(proc_main, 0, prim_t_int);
+ owner = new_type_class (new_id_from_chars ("IF_WHILE_EXAMPLE", 16));
+ ent = new_entity (owner, new_id_from_chars ("main", 4), proc_main);
+ get_entity_ld_name(ent);
/* Generates start and end blocks and nodes and a first, initial block */
irg = new_ir_graph (ent, 4);
/* Generate two constants */
- set_value (0, new_Const (mode_I, tarval_from_long (mode_i, 0)));
- set_value (1, new_Const (mode_I, tarval_from_long (mode_i, 1)));
- mature_block (irg->current_block);
+ set_value(0, new_Const(mode_Iu, new_tarval_from_long(0, mode_Iu)));
+ set_value(1, new_Const(mode_Iu, new_tarval_from_long(1, mode_Iu)));
+ mature_immBlock(get_irg_current_block(irg));
/* Generate a conditional branch */
- x = new_Cond (new_Proj(new_Cmp(new_Const (mode_I, tarval_from_long (mode_i, 0)),
- new_Const (mode_I, tarval_from_long (mode_i, 0))),
- 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_Block ();
- add_in_edge (r, t);
- set_value (0, new_Const (mode_I, tarval_from_long (mode_i, 2)));
- mature_block (r);
- x = new_Jmp ();
+ x = new_Jmp();
/* generate the fall through block and add all cfg edges */
- r = new_Block ();
- add_in_edge (r, f);
- add_in_edge (r, x);
- mature_block (r);
- x = new_Jmp ();
+ r = new_immBlock();
+ add_immBlock_pred(r, x);
+ mature_immBlock(r);
+ x = new_Jmp();
/* generate a block for the loop header and the conditional branch */
- r = new_Block ();
- add_in_edge (r, x);
- x = new_Cond (new_Proj(new_Cmp(new_Const (mode_I, tarval_from_long (mode_i, 0)),
- new_Const (mode_I, tarval_from_long (mode_i, 0))),
- mode_b, Eq));
- f = new_Proj (x, mode_X, 0);
- t = new_Proj (x, mode_X, 1);
+ r = new_immBlock();
+ add_immBlock_pred(r, x);
+ x = new_Cond(new_Proj(new_Cmp(new_Const(mode_Iu, new_tarval_from_long(0, mode_Iu)),
+ new_Const(mode_Iu, new_tarval_from_long(0, mode_Iu))),
+ mode_b, pn_Cmp_Eq));
+ f = new_Proj(x, mode_X, pn_Cond_false);
+ t = new_Proj(x, mode_X, pn_Cond_true);
/* generate the block for the loop body */
- b = new_Block ();
- add_in_edge (b,t);
- x = new_Jmp ();
- add_in_edge (r, x);
- mature_block (r);
+ b = new_immBlock();
+ add_immBlock_pred(b,t);
+ x = new_Jmp();
+ add_immBlock_pred(r, x);
+ mature_immBlock(r);
/* the code in the loop body,
- as we are dealing with local variable only the dataflow edges are manipulated */
- set_value (2, get_value (0, mode_I));
- set_value (0, get_value (1, mode_I));
- set_value (1, get_value (2, mode_I));
- mature_block (b);
+ as we are dealing with local variables only the dataflow edges
+ are manipulated */
+ set_value(2, get_value(0, mode_Iu));
+ set_value(0, get_value(1, mode_Iu));
+ set_value(1, get_value(2, mode_Iu));
+ mature_immBlock(b);
/* generate the return block */
- r = new_Block ();
- add_in_edge (r, f);
- mature_block (r);
+ r = new_immBlock();
+ add_immBlock_pred(r, f);
+ mature_immBlock(r);
{
ir_node *in[1];
- in[0] = new_Sub (get_value (0, mode_I), get_value (1, mode_I), mode_I);
+ in[0] = new_Sub(get_value(0, mode_Iu), get_value(1, mode_Iu), mode_Iu);
- x = new_Return (get_store (), 1, in);
+ x = new_Return(get_store(), 1, in);
}
/* finalize the end block generated in new_ir_graph() */
- add_in_edge (irg->end_block, x);
- mature_block (irg->end_block);
+ add_immBlock_pred(get_irg_end_block(irg), x);
+ mature_immBlock(get_irg_end_block(irg));
- /* output the vcg file */
- printf("\nDone building the graph. Dumping it.\n");
- dump_ir_block_graph (irg);
+ irg_finalize_cons(irg);
- printf("use xvcg to view this graph:\n");
- printf("/ben/trapp/bin/i486/xvcg GRAPHNAME\n");
+ printf("Optimizing ...\n");
+
+ local_optimize_graph(irg);
+ dead_node_elimination(irg);
+
+ compute_irg_outs(irg);
+
+ /* verify the graph */
+ irg_vrfy(irg);
+
+ /* output the vcg file */
+ printf("Done building the graph. Dumping it with out-edges.\n");
+ dump_out_edges(1);
+ dump_ir_graph(irg, 0);
+ printf("Use ycomp to view this graph:\n");
+ printf("ycomp GRAPHNAME\n\n");
- return (0);
+ return 0;
}
projects / libfirm / blobdiff