besched: Add and use sched_replace().

[libfirm] / ir / be / beabihelper.h

diff --git a/ir/be/beabihelper.h b/ir/be/beabihelper.h
index 30dded2..735df82 100644 (file)
--- a/ir/be/beabihelper.h
+++ b/ir/be/beabihelper.h
@@ -22,7 +22,6 @@
  * @brief       Helper functions for handling ABI constraints in the code
  *              selection phase.
  * @author      Matthias Braun
- * @version     $Id$
  */
 #ifndef FIRM_BE_BEABI_HELPER_H
 #define FIRM_BE_BEABI_HELPER_H
@@ -32,9 +31,16 @@
 #include "bearch.h"
 
 typedef struct beabi_helper_env_t beabi_helper_env_t;
+typedef struct be_stackorder_t    be_stackorder_t;
 
+/**
+ * Creates a helper object for the ABI constraint handling.
+ */
 beabi_helper_env_t *be_abihelper_prepare(ir_graph *irg);
 
+/**
+ * Terminates a helper object for the ABI constraint handling.
+ */
 void be_abihelper_finish(beabi_helper_env_t *env);
 
 /**
@@ -43,7 +49,7 @@ void be_abihelper_finish(beabi_helper_env_t *env);
  *  - Callee-Save registers (we need to restore that value at the end)
  *  - Parameters passed in registers
  *  - stack pointer, base pointer, ...
- * It is possible to specify additional irn flags (usefull to mark a value
+ * It is possible to specify additional irn flags (useful to mark a value
  * as ignore or produces_sp).
  */
 void be_prolog_add_reg(beabi_helper_env_t *env, const arch_register_t *reg,
@@ -56,15 +62,9 @@ void be_prolog_add_reg(beabi_helper_env_t *env, const arch_register_t *reg,
 ir_node *be_prolog_create_start(beabi_helper_env_t *env, dbg_info *dbgi,
                                 ir_node *block);
 
-/**
- * Creates a barrier node which lets all registers specified by prolog_add_reg
- * pass through
- */
-ir_node *be_prolog_create_barrier(beabi_helper_env_t *env, ir_node *block);
-
 /**
  * Get "value" of a register.
- * This usually creates a Proj node for the start-node or barrier-node.
+ * This usually creates a Proj node for the start-node.
  * Or returns the value set by a abi_helper_set_reg_value call
  */
 ir_node *be_prolog_get_reg_value(beabi_helper_env_t *env,
@@ -101,8 +101,6 @@ ir_node *be_epilog_get_memory(beabi_helper_env_t *env);
 
 void be_epilog_begin(beabi_helper_env_t *env);
 
-ir_node *be_epilog_create_barrier(beabi_helper_env_t *env, ir_node *block);
-
 /**
  * Create return node and finishes epilog handling
  */
@@ -115,15 +113,39 @@ ir_node *be_epilog_create_return(beabi_helper_env_t *env, dbg_info *dbgi,
 void be_add_missing_keeps(ir_graph *irg);
 
 /**
- * Collect firm nodes that will probably modify the stack.
- * Put them into an order that respects all their dependencies.
+ * Make sure all outputs of a node are used, add keeps otherwise
  */
-void be_collect_stacknodes(beabi_helper_env_t *env);
+void be_add_missing_keeps_node(ir_node *node);
+
+/**
+ * In the normal firm representation some nodes like pure calls, builtins
+ * have no memory inputs+outputs. However in the backend these sometimes have to
+ * access the stack to work and therefore suddenly need to be enqueued into the
+ * memory edge again.
+ * This API creates a possible order to enqueue them so we can be sure to create
+ * a legal dependency graph when transforming them.
+ */
+be_stackorder_t *be_collect_stacknodes(ir_graph *irg);
 
 /**
  * return node that should produce the predecessor stack node in a block.
  * returns NULL if there's no predecessor in the current block.
  */
-ir_node *be_get_stack_pred(const beabi_helper_env_t *env, const ir_node *node);
+ir_node *be_get_stack_pred(const be_stackorder_t *env, const ir_node *node);
+
+/**
+ * free memory associated with a stackorder structure
+ */
+void be_free_stackorder(be_stackorder_t *env);
+
+/**
+ * In case where a parameter is transmitted via register but someone takes its
+ * address a store to the frame which can be references is necessary.
+ * This function can be used as a preprocessing phase before transformation to
+ * do this. The assumption is that all parameter_entities which are passed
+ * through the stack are already moved to the arg_type and all remaining
+ * parameter_entities on the frame type need stores.
+ */
+void be_add_parameter_entity_stores(ir_graph *irg);
 
 #endif