Fixed some bugs

[libfirm] / ir / be / bearch.c

diff --git a/ir/be/bearch.c b/ir/be/bearch.c
index a765e3a..0cffa70 100644 (file)
--- a/ir/be/bearch.c
+++ b/ir/be/bearch.c
@@ -13,6 +13,7 @@
 #ifdef HAVE_ALLOCA_H
 #include <alloca.h>
 #endif
+
 #ifdef HAVE_MALLOC_H
 #include <malloc.h>
 #endif
@@ -80,6 +81,7 @@ const arch_register_req_t *arch_get_register_req(const arch_env_t *env,
     arch_register_req_t *req, const ir_node *irn, int pos)
 {
   const arch_irn_ops_t *ops = get_irn_ops(env, irn);
+  req->type = arch_register_req_type_none;
   return ops->get_irn_reg_req(ops, req, irn, pos);
 }
 
@@ -90,19 +92,16 @@ int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn,
   const arch_irn_ops_t *ops = get_irn_ops(env, irn);
   const arch_register_req_t *req = ops->get_irn_reg_req(ops, &local_req, irn, pos);
 
-  switch(req->type) {
-    case arch_register_req_type_normal:
-      arch_register_class_put(req->cls, bs);
-      return req->cls->n_regs;
-
-    case arch_register_req_type_limited:
-      return req->data.limited(irn, pos, bs);
-
-    default:
-      assert(0 && "This register requirement case is not covered");
+  if(req->type == arch_register_req_type_none) {
+         bitset_clear_all(bs);
+         return 0;
   }
 
-  return 0;
+  if(arch_register_req_is(req, limited))
+         return req->limited(irn, pos, bs);
+
+  arch_register_class_put(req->cls, bs);
+  return req->cls->n_regs;
 }
 
 int arch_is_register_operand(const arch_env_t *env,
@@ -117,25 +116,20 @@ int arch_is_register_operand(const arch_env_t *env,
 int arch_reg_is_allocatable(const arch_env_t *env, const ir_node *irn,
     int pos, const arch_register_t *reg)
 {
-       int res = 0;
        arch_register_req_t req;
 
        arch_get_register_req(env, &req, irn, pos);
-       switch(req.type) {
-               case arch_register_req_type_normal:
-                       res = req.cls == reg->reg_class;
-                       break;
-               case arch_register_req_type_limited:
-                       {
-                               bitset_t *bs = bitset_alloca(req.cls->n_regs);
-                               req.data.limited(irn, pos, bs);
-                               res = bitset_is_set(bs, arch_register_get_index(reg));
-                       }
-               default:
-                       res = 0;
+
+       if(req.type == arch_register_req_type_none)
+               return 0;
+
+       if(arch_register_req_is(&req, limited)) {
+               bitset_t *bs = bitset_alloca(req.cls->n_regs);
+               req.limited(irn, pos, bs);
+               return bitset_is_set(bs, arch_register_get_index(reg));
        }
 
-       return res;
+       return req.cls == reg->reg_class;
 }
 
 const arch_register_class_t *