X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fcritical_edges.c;h=4717244ebba3bd4cc5713413fb6da6c8ebd5e842;hb=ce6161a7e42a48f7422b7babcc64d8ace18e2687;hp=1e2284adf557fc910b071cc6f03d3fcdc3da3d9f;hpb=86f5ed335727adaa9e6550254fb6d2726982bf33;p=libfirm

diff --git a/ir/opt/critical_edges.c b/ir/opt/critical_edges.c
index 1e2284adf..4717244eb 100644
--- a/ir/opt/critical_edges.c
+++ b/ir/opt/critical_edges.c
@@ -24,9 +24,7 @@
  *           Michael Beck
  * @version  $Id$
  */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include "config.h"
 
 #include "irop_t.h"
 #include "irnode_t.h"
@@ -48,10 +46,11 @@ typedef struct cf_env {
  * @param n   IR node
  * @param env Environment of walker.
  */
-static void walk_critical_cf_edges(ir_node *n, void *env) {
+static void walk_critical_cf_edges(ir_node *n, void *env)
+{
 	int arity, i;
 	ir_node *pre, *block, *jmp;
-	cf_env *cenv = env;
+	cf_env *cenv = (cf_env*)env;
 	ir_graph *irg = get_irn_irg(n);
 
 	/* Block has multiple predecessors */
@@ -74,6 +73,12 @@ static void walk_critical_cf_edges(ir_node *n, void *env) {
 					continue;
 				goto insert;
 			}
+			if (is_IJmp(pre)) {
+				/* we can't add blocks in between ijmp and its destinations
+				 * TODO: What now, we can't split all critical edges because of this... */
+				fprintf(stderr, "libfirm warning: Couldn't split all critical edges (compiler will probably fail now)\n");
+				continue;
+			}
 			/* we don't want place nodes in the start block, so handle it like forking */
 			if (is_op_forking(cfop) || cfop == op_Start) {
 				/* Predecessor has multiple successors. Insert new control flow edge edges. */
@@ -81,7 +86,7 @@ insert:
 				/* set predecessor of new block */
 				block = new_r_Block(irg, 1, &pre);
 				/* insert new jmp node to new block */
-				jmp = new_r_Jmp(irg, block);
+				jmp = new_r_Jmp(block);
 				/* set successor of new block */
 				set_irn_n(n, i, jmp);
 				cenv->changed = 1;
@@ -90,10 +95,11 @@ insert:
 	} /* n is a multi-entry block */
 }
 
-void remove_critical_cf_edges(ir_graph *irg) {
+void remove_critical_cf_edges_ex(ir_graph *irg, int ignore_exception_edges)
+{
 	cf_env env;
 
-	env.ignore_exc_edges = 1;
+	env.ignore_exc_edges = (char)ignore_exception_edges;
 	env.changed          = 0;
 
 	irg_block_walk_graph(irg, NULL, walk_critical_cf_edges, &env);
@@ -105,3 +111,8 @@ void remove_critical_cf_edges(ir_graph *irg) {
 		set_irg_loopinfo_inconsistent(irg);
 	}
 }
+
+void remove_critical_cf_edges(ir_graph *irg)
+{
+	remove_critical_cf_edges_ex(irg, 1);
+}