X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbechordal.c;h=d9d5506b007f1fca15302cabcdb982362eb67ba5;hb=d300330b1e6df8c8914b8fb70cf38ee1c8ca2634;hp=23782670029f9479ae1654c8fd924130cee67598;hpb=96c886ce8da63a60b748a182aae2ce042abb6fe8;p=libfirm

diff --git a/ir/be/bechordal.c b/ir/be/bechordal.c
index 237826700..d9d5506b0 100644
--- a/ir/be/bechordal.c
+++ b/ir/be/bechordal.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -157,7 +157,7 @@ static INLINE border_t *border_add(be_chordal_env_t *env, struct list_head *head
 	else {
 		b = get_irn_link(irn);
 
-		assert(b && b->magic == BORDER_FOURCC && "Illegal border encountered");
+		DEBUG_ONLY(assert(b && b->magic == BORDER_FOURCC && "Illegal border encountered"));
 	}
 
 	b->pressure = pressure;
@@ -293,6 +293,11 @@ static ir_node *prepare_constr_insn(be_chordal_env_t *env, ir_node *irn)
 			if(a_op->carrier != op->carrier || !a_op->has_constraints)
 				continue;
 
+			/* if the constraint is the same, no copy is necessary
+			 * TODO generalise unequal but overlapping constraints */
+			if (a_op->req == op->req)
+				continue;
+
 			if (be_is_Copy(get_irn_n(insn->irn, a_op->pos)))
 				continue;
 
@@ -992,11 +997,6 @@ void be_ra_chordal_color(be_chordal_env_t *chordal_env)
 
 	int colors_n          = arch_register_class_n_regs(cls);
 	ir_graph *irg         = chordal_env->irg;
-	int allocatable_regs  = colors_n - be_put_ignore_regs(birg, cls, NULL);
-
-	/* some special classes contain only ignore regs, no work to be done */
-	if(allocatable_regs == 0)
-		return;
 
 	be_assure_dom_front(birg);
 	lv = be_assure_liveness(birg);
@@ -1012,6 +1012,8 @@ void be_ra_chordal_color(be_chordal_env_t *chordal_env)
 	env.in_colors     = bitset_alloca(colors_n);
 	env.pre_colored   = pset_new_ptr_default();
 
+	BE_TIMER_PUSH(t_constr);
+
 	/* Handle register targeting constraints */
 	dom_tree_walk_irg(irg, constraints, NULL, &env);
 
@@ -1020,6 +1022,8 @@ void be_ra_chordal_color(be_chordal_env_t *chordal_env)
 		be_dump(chordal_env->irg, buf, dump_ir_block_graph_sched);
 	}
 
+	BE_TIMER_POP(t_constr);
+
 	env.live = bitset_malloc(get_irg_last_idx(chordal_env->irg));
 
 	/* First, determine the pressure */