2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Instrumentation of graphs.
24 * @author Michael Beck
28 #include "irgraph_t.h"
32 #include "instrument.h"
34 void instrument_initcall(ir_graph *irg, ir_entity *ent)
36 ir_node *initial_exec;
38 ir_node *first_block = NULL;
39 int i, idx, need_new_block;
44 /* find the first block */
45 initial_exec = get_irg_initial_exec(irg);
46 start_block = get_irg_start_block(irg);
48 foreach_out_edge(initial_exec, edge) {
49 ir_node *succ = get_edge_src_irn(edge);
51 if (succ != start_block && is_Block(succ)) {
52 /* found the first block */
57 if (first_block == NULL) {
58 panic("Cannot find first block of irg %+F", irg);
61 /* check if this block has only one predecessor */
64 for (i = get_Block_n_cfgpreds(first_block) - 1; i >= 0; --i) {
65 ir_node *p = get_Block_cfgpred(first_block, i);
69 if (p == initial_exec)
76 ir_node *blk = new_r_Block(irg, 1, &initial_exec);
77 set_Block_cfgpred(first_block, idx, new_r_Jmp(blk));
83 ir_node *const adr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
84 ir_node *const initial_mem = get_irg_initial_mem(irg);
85 ir_node *const call = new_r_Call(first_block, initial_mem, adr, 0, NULL, get_entity_type(ent));
86 ir_node *const new_mem = new_r_Proj(call, mode_M, pn_Call_M);
88 edges_reroute_except(initial_mem, new_mem, call);
89 /* beware: reroute routes anchor edges also, revert this */
90 set_irg_initial_mem(irg, initial_mem);