moved get_inverse_op to bearch

[libfirm] / ir / be / bearch.h

diff --git a/ir/be/bearch.h b/ir/be/bearch.h
index a6b5ca0..68db5a2 100644 (file)
--- a/ir/be/bearch.h
+++ b/ir/be/bearch.h
@@ -187,6 +187,19 @@ typedef enum _arch_irn_class_t {
   arch_irn_class_const,
 } arch_irn_class_t;
 
+/**
+ * An inverse operation returned by the backend
+ */
+typedef struct _arch_inverse_t {
+  int        n; /**< count of nodes returned in nodes array */
+  int        costs; /**< costs of this remat */
+
+  /**> nodes for this inverse operation. shall be in
+   *  schedule order. last element is the target value
+   */
+  ir_node  **nodes;
+} arch_inverse_t;
+
 /**
  * Some flags describing a node in more detail.
  */
@@ -195,7 +208,8 @@ typedef enum _arch_irn_flags_t {
        arch_irn_flags_dont_spill       = 1, /**< This must not be spilled. */
        arch_irn_flags_rematerializable = 2, /**< This should be replicated instead of spilled/reloaded. */
        arch_irn_flags_ignore           = 4, /**< Ignore node during register allocation. */
-       arch_irn_flags_last             = arch_irn_flags_ignore
+       arch_irn_flags_modify_sp        = 8, /**< I modify the stack pointer. */
+       arch_irn_flags_last             = arch_irn_flags_modify_sp
 } arch_irn_flags_t;
 
 /**
@@ -270,6 +284,19 @@ struct _arch_irn_ops_if_t {
    * @param offset The offset of the node's stack frame entity.
    */
   void (*set_frame_offset)(const void *self, ir_node *irn, int offset);
+
+  /**
+   * Returns an inverse operation which yields the i-th argument
+   * of the given node as result.
+   *
+   * @param irn       The original operation
+   * @param i         Index of the argument we want the inverse oparation to yield
+   * @param inverse   struct to be filled with the resulting inverse op
+   * @param obstack   The obstack to use for allocation of the returned nodes array
+   * @return          The inverse operation or NULL if operation invertible
+   */
+  arch_inverse_t *(*get_inverse)(const void *self, const ir_node * irn, int i, arch_inverse_t * inverse, struct obstack * obstack);
+
 };
 
 /**
@@ -283,6 +310,8 @@ extern void arch_set_frame_offset(const arch_env_t *env, ir_node *irn, int bias)
 
 extern entity *arch_get_frame_entity(const arch_env_t *env, ir_node *irn);
 
+extern arch_inverse_t *arch_get_inverse(const arch_env_t *env, const ir_node * irn, int i, arch_inverse_t * inverse, struct obstack * obstack);
+
 /**
  * Get the register requirements for a node.
  * @param env The architecture environment.