Initial commit of morgans spilling algorithm (spill unused values that live through

[libfirm] / ir / be / bearch.h

diff --git a/ir/be/bearch.h b/ir/be/bearch.h
index 8fec55d..86005f4 100644 (file)
--- a/ir/be/bearch.h
+++ b/ir/be/bearch.h
@@ -386,6 +386,15 @@ extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn,
  */
 extern void arch_put_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls, bitset_t *bs);
 
+/**
+ * Return the number of registers in a register class which should not be
+ * ignored by the register allocator.
+ * @param env The architecture environment.
+ * @param cls The register class to consider
+ * @return       The number of non-ignore registers in the register class
+ */
+extern int arch_count_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls);
+
 /**
  * Check, if a register is assignable to an operand of a node.
  * @param env The architecture environment.