+/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
+** All rights reserved.
+**
+** Authors: Christian Schaefer, Goetz Lindenmaier
+**
+** testprogram.
+*/
+
+# include <stdio.h>
+
+# include "irdump.h"
+# include "firm.h"
+
+/*
+ * a dead block / unreachable code.
+ */
+
+/**
+*** This file constructs a control flow of following shape:
+***
+***
+*** firstCondBlock
+*** / \
+*** / \
+*** |/_ _\|
+*** Block1 scnCondBlock
+*** | | |
+*** | | |
+*** | \ / \ /
+*** | Block2 Block3
+*** \ | /
+*** \ | /
+*** _\| \ / |/_
+*** 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)
+{
+ ir_graph *irg; /* this variable contains the irgraph */
+ type_class *owner; /* the class in which this method is defined */
+ type_method *proc_main; /* type information for the method main */
+ entity *ent; /* represents this method as entity of owner */
+ ir_node *c1, *c2, *cond, *f, *t, *endBlock, *Block1, *jmp,
+ *scndCondBlock, *Block2, *Block3, *x;
+
+ /* init library */
+ init_firm ();
+
+ set_optimize(1);
+
+ /* 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.
+ * This class now is automatically generated.
+ */
+#define METHODNAME "main"
+#define NRARGS 1
+#define NRES 1
+ printf("creating an IR graph: ...\n");
+
+ owner = get_glob_type();
+ proc_main = new_type_method(id_from_str(METHODNAME, strlen(METHODNAME)),
+ NRARGS, NRES);
+ /** @@@ setting of arg/res types misses **/
+ ent = new_entity ((type *)owner,
+ id_from_str (METHODNAME, strlen(METHODNAME)),
+ (type *)proc_main);
+
+#define NUM_OF_LOCAL_VARS 2
+
+ irg = new_ir_graph (ent, NUM_OF_LOCAL_VARS);
+
+ /* to make a condition */
+ c1 = new_Const (mode_i, tarval_from_long (mode_i, 1));
+ c2 = new_Proj (get_irg_args(irg), mode_i, 0);
+ set_value(1, c2);
+
+ cond = new_Cond(new_Proj(new_Cmp(c1, c2), mode_b, Eq));
+ set_value(0, new_Const (mode_i, tarval_from_long (mode_i, 6)));
+ f = new_Proj(cond, mode_X, 0);
+ t = new_Proj(cond, mode_X, 1);
+ mature_block(irg->current_block);
+
+ /* end block to add jmps */
+ endBlock = new_Block();
+
+ /* Block 1 */
+ Block1 = new_Block();
+ add_in_edge(Block1, t);
+ mature_block(Block1);
+ set_value(0, new_Const (mode_i, tarval_from_long (mode_i, 5)));
+ jmp = new_Jmp();
+ add_in_edge(endBlock, jmp);
+
+ /* scndCondBlock */
+ scndCondBlock = new_Block();
+ add_in_edge(scndCondBlock, f);
+ mature_block(scndCondBlock);
+ c1 = new_Const (mode_i, tarval_from_long (mode_i, 3));
+ cond = new_Cond(new_Proj(new_Cmp(c1, get_value(1, mode_i)), mode_b, Eq));
+ f = new_Proj(cond, mode_X, 0);
+ t = new_Proj(cond, mode_X, 1);
+ mature_block(irg->current_block);
+
+ /* Block 2 */
+ Block2 = new_Block();
+ add_in_edge(Block2, f);
+ mature_block(Block2);
+ jmp = new_Jmp();
+ add_in_edge(endBlock, jmp);
+
+ /* Block 3 */
+ Block3 = new_Block();
+ add_in_edge(Block3, t);
+ mature_block(Block3);
+ jmp = new_Jmp();
+ add_in_edge(endBlock, jmp);
+
+ /* finish the end Block */
+ switch_block(endBlock);
+ {
+ ir_node *in[1];
+ in[0] = get_value(0, mode_i);
+ x = new_Return (get_store(), 1, in);
+ }
+ mature_block (irg->current_block);
+
+ /* finish the Block with the end node */
+ add_in_edge (irg->end_block, x);
+ mature_block (irg->end_block);
+
+ printf("\nDone building the graph.\n");
+
+ /* verify the graph */
+ irg_vrfy(irg);
+
+ printf("Dumping the graph and a control flow graph.\n");
+ dump_ir_block_graph (irg);
+ dump_cfg (irg);
+ printf("use xvcg to view these graphs:\n");
+ printf("/ben/goetz/bin/xvcg GRAPHNAME\n");
+
+ return (0);
+}