-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Christian Schaefer, Goetz Lindenmaier
-**
-** testprogram.
-*/
+/*
+ * Project: libFIRM
+ * File name: testprograms/dead_block_example.c
+ * Purpose: Test unreachable code elimination.
+ * 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 <stdio.h>
-# include "irdump.h"
-# include "firm.h"
+#include <libfirm/firm.h>
/*
* a dead block / unreachable code.
*/
/**
-*** This file constructs a control flow of following shape:
-***
-***
-*** firstBlock
-*** / \
-*** / \
-*** |/_ _\|
-*** Block1 Block2 deadBlock
-*** \ | /
-*** \ | /
-*** _\| \ / |/_
-*** nextBlock
-***
-***
-*** This is a program as, e.g.,
-***
-*** if () then
-*** { Jmp label1; } // happens anyways
-*** else
-*** { Jmp label1; } // happens anyways
-*** label1:
-*** return();
-*** Jmp label1;
-***
+* This file constructs a control flow of following shape:
+*
+*
+* firstBlock
+* / \
+* / \
+* |/_ _\|
+* Block1 Block2 deadBlock
+* \ | /
+* \ | /
+* _\| \ / |/_
+* nextBlock
+*
+*
+* This is a program as, e.g.,
+*
+* if () then
+* { Jmp label1; } // happens anyways
+* else
+* { Jmp label1; } // happens anyways
+* label1:
+* return();
+* Jmp label1;
+*
**/
-int main(int argc, char **argv)
+int main(void)
{
+ char *dump_file_suffix = "";
ir_graph *irg; /* this variable contains the irgraph */
- type_class *owner; /* the class in which this method is defined */
- type_method *proc_main; /* typeinformation for the method main */
- entity *ent; /* represents this method as entity of owner */
+ ir_type *owner; /* the class in which this method is defined */
+ ir_type *proc_main; /* ir_type information for the method main */
+ ir_type *prim_t_int;
+ ir_entity *ent; /* represents this method as ir_entity of owner */
ir_node *c1, *c2, *cond, *f, *t, *endBlock, *Block1, *jmp, *Block2,
*deadBlock, *x;
-
/* 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 "empty" according to the file name
- * with a method main as an entity.
+ * with a method main as an ir_entity.
*/
#define CLASSNAME "DEAD_BLOCK"
#define METHODNAME "main"
#define NRARGS 0
-#define NRES 0
- printf("creating an IR graph: %s...\n", CLASSNAME);
+#define NRES 1
+ printf("\nCreating an IR graph: %s...\n", CLASSNAME);
- owner = new_type_class (id_from_str (CLASSNAME, strlen(CLASSNAME)));
- proc_main = new_type_method(id_from_str(METHODNAME, strlen(METHODNAME)),
+ owner = new_type_class (new_id_from_chars (CLASSNAME, strlen(CLASSNAME)));
+ proc_main = new_type_method(new_id_from_chars(METHODNAME, strlen(METHODNAME)),
NRARGS, NRES);
- ent = new_entity ((type *)owner,
- id_from_str (METHODNAME, strlen(METHODNAME)),
- (type *)proc_main);
-
+ set_method_res_type(proc_main, 0, prim_t_int);
+ ent = new_entity (owner,
+ new_id_from_chars (METHODNAME, strlen(METHODNAME)),
+ proc_main);
+ get_entity_ld_name(ent); /* To enforce name mangling for vcg graph name */
#define NUM_OF_LOCAL_VARS 1
irg = new_ir_graph (ent, NUM_OF_LOCAL_VARS);
- /* two make a condition */
- c1 = new_Const (mode_i, tarval_from_long (mode_i, 1));
- c2 = new_Const (mode_i, tarval_from_long (mode_i, 2));
+ /* to make a condition */
+ c1 = new_Const (mode_Is, new_tarval_from_long (1, mode_Is));
+ c2 = new_Const (mode_Is, new_tarval_from_long (2, mode_Is));
+ set_value(0, c2);
- cond = new_Cond(new_Proj(new_Cmp(c1, c2), mode_b, Eq));
+ cond = new_Cond(new_Proj(new_Cmp(c1, c2), mode_b, pn_Cmp_Eq));
f = new_Proj(cond, mode_X, 0);
t = new_Proj(cond, mode_X, 1);
- mature_block(irg->current_block);
+ mature_immBlock(get_irg_current_block(irg));
/* end block to add jmps */
- endBlock = new_Block();
+ endBlock = new_immBlock();
/* Block 1 */
- Block1 = new_Block();
- add_in_edge(Block1, t);
- mature_block(Block1);
+ Block1 = new_immBlock();
+ add_immBlock_pred(Block1, t);
+ mature_immBlock(Block1);
jmp = new_Jmp();
- add_in_edge(endBlock, jmp);
+ add_immBlock_pred(endBlock, jmp);
/* Block 2 */
- Block2 = new_Block();
- add_in_edge(Block2, f);
- mature_block(Block2);
- set_value(0, c2);
+ Block2 = new_immBlock();
+ add_immBlock_pred(Block2, f);
+ mature_immBlock(Block2);
jmp = new_Jmp();
- add_in_edge(endBlock, jmp);
+ add_immBlock_pred(endBlock, jmp);
/* dead Block */
- deadBlock = new_Block();
- mature_block(deadBlock);
+ deadBlock = new_immBlock();
+ mature_immBlock(deadBlock);
jmp = new_Jmp();
- add_in_edge(endBlock, jmp);
+ add_immBlock_pred(endBlock, jmp);
- switch_block(endBlock);
+ /* finish end block */
+ set_cur_block(endBlock);
{
ir_node *in[1];
- in[0] = get_value(0, mode_i);
+ in[0] = get_value(0, mode_Is);
+ get_store();
x = new_Return (get_store(), 1, in);
}
- mature_block (irg->current_block);
+ mature_immBlock (get_irg_current_block(irg));
- 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));
- /* verify the graph */
- vrfy_graph(irg);
+ irg_finalize_cons (irg);
- printf("\nDone building the graph.\n");
+ printf("Optimizing ...\n");
local_optimize_graph (irg);
- printf("\nDone local optimization.\n");
- set_opt_constant_folding (1);
- set_optimize(0);
- set_opt_cse(1);
dead_node_elimination (irg);
- printf("Dumping the graph and a control flow graph.\n");
- dump_ir_block_graph (irg);
- dump_cfg (irg);
+ /* verify the graph */
+ irg_vrfy(irg);
- printf("use xvcg to view these graphs:\n");
- printf("/ben/goetz/bin/xvcg GRAPHNAME\n");
+ printf("Dumping the graph and a control flow graph.\n");
+ dump_ir_block_graph (irg, dump_file_suffix);
+ dump_cfg (irg, dump_file_suffix);
+ printf("Use ycomp to view these graphs:\n");
+ printf("ycomp GRAPHNAME\n\n");
return (0);
}
projects / libfirm / blobdiff