X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeinsn.c;h=f8e98ecf5b01a1ac8006fe2b3c5115a039683dac;hb=8a700094481e615687fa4f026d92a2c5a59b27a7;hp=0ca12813833f654b253fcb25aa279099b7806f62;hpb=0570a14ad2d910107d0692ab2e2a76d6d265b9d2;p=libfirm

diff --git a/ir/be/beinsn.c b/ir/be/beinsn.c
index 0ca128138..f8e98ecf5 100644
--- a/ir/be/beinsn.c
+++ b/ir/be/beinsn.c
@@ -1,20 +1,6 @@
 /*
- * Copyright (C) 1995-2008 University of Karlsruhe.  All right reserved.
- *
  * This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
  */
 
 /**
@@ -35,83 +21,52 @@
 #include "beabi.h"
 #include "raw_bitset.h"
 
-be_insn_t *be_scan_insn(be_chordal_env_t const *const env, ir_node *const irn)
+be_insn_t *be_scan_insn(be_chordal_env_t *const env, ir_node *const irn)
 {
-	struct obstack *obst = env->obst;
+	struct obstack *const obst = &env->obst;
 	be_operand_t o;
-	int i, n;
 
 	be_insn_t *insn = OALLOCZ(obst, be_insn_t);
 
-	insn->irn = irn;
-	if (get_irn_mode(irn) == mode_T) {
-		ir_node *p;
-
-		/* This instruction might create more than one def. These are handled
-		   by Proj's, find them. */
-		foreach_out_edge(irn, edge) {
-			p = get_edge_src_irn(edge);
+	bool has_constraints = false;
 
-			/* did not work if the result is a ProjT. This should NOT happen
-			   in the backend, but check it for now. */
-			assert(get_irn_mode(p) != mode_T);
-
-			if (arch_irn_consider_in_reg_alloc(env->cls, p)) {
-				/* found a def: create a new operand */
-				o.req             = arch_get_irn_register_req(p);
-				o.carrier         = p;
-				o.irn             = irn;
-				o.partner         = NULL;
-				obstack_grow(obst, &o, sizeof(o));
-				insn->n_ops++;
-				insn->has_constraints |= arch_register_req_is(o.req, limited) | (o.req->width > 1);
-			}
+	const arch_register_class_t *cls = env->cls;
+	insn->irn = irn;
+	be_foreach_definition(irn, cls, p, req,
+		/* found a def: create a new operand */
+		if (arch_register_req_is(req, limited)) {
+			o.regs          = req->limited;
+			has_constraints = true;
+		} else {
+			o.regs           = env->allocatable_regs->data;
+			has_constraints |= req->width > 1;
 		}
-	} else if (arch_irn_consider_in_reg_alloc(env->cls, irn)) {
-		/* only one def, create one operand */
-		o.req     = arch_get_irn_register_req(irn);
-		o.carrier = irn;
-		o.irn     = irn;
+		o.carrier = p;
 		o.partner = NULL;
 		obstack_grow(obst, &o, sizeof(o));
 		insn->n_ops++;
-		insn->has_constraints |= arch_register_req_is(o.req, limited) | (o.req->width > 1);
-	}
+	);
 
 	insn->use_start = insn->n_ops;
 
 	/* now collect the uses for this node */
-	for (i = 0, n = get_irn_arity(irn); i < n; ++i) {
-		ir_node *op = get_irn_n(irn, i);
-
-		if (arch_irn_consider_in_reg_alloc(env->cls, op)) {
-			/* found a register use, create an operand */
-			o.req     = arch_get_irn_register_req_in(irn, i);
-			o.carrier = op;
-			o.irn     = irn;
-			o.partner = NULL;
-			obstack_grow(obst, &o, sizeof(o));
-			insn->n_ops++;
-			insn->has_constraints |= arch_register_req_is(o.req, limited);
-		}
-	}
-
-	insn->ops = (be_operand_t*)obstack_finish(obst);
-
-	/* Compute the admissible registers bitsets. */
-	for (i = 0; i < insn->n_ops; ++i) {
-		be_operand_t              *const op  = &insn->ops[i];
-		arch_register_req_t const *const req = op->req;
-		assert(req->cls == env->cls);
-
-		if (req->type & arch_register_req_type_limited) {
-			bitset_t *regs = bitset_obstack_alloc(obst, env->cls->n_regs);
-			rbitset_copy_to_bitset(req->limited, regs);
-			op->regs = regs;
+	be_foreach_use(irn, cls, in_req, op, op_req,
+		/* found a register use, create an operand */
+		if (arch_register_req_is(in_req, limited)) {
+			o.regs          = in_req->limited;
+			has_constraints = true;
 		} else {
-			op->regs = env->allocatable_regs;
+			o.regs = env->allocatable_regs->data;
 		}
-	}
+		o.carrier = op;
+		o.partner = NULL;
+		obstack_grow(obst, &o, sizeof(o));
+		insn->n_ops++;
+	);
 
+	if (!has_constraints)
+		return NULL;
+
+	insn->ops = (be_operand_t*)obstack_finish(obst);
 	return insn;
 }