* File name: ir/ir/irflag.h
* Purpose: Flags to control optimizations.
* Author: Christian Schaefer, Goetz Lindenmaier
- * Modified by:
+ * Modified by: Michael Beck
* Created:
* CVS-ID: $Id$
* Copyright: (c) 1999-2003 Universität Karlsruhe
/**
* @file irflag.h
*
- * Optimization flags.
+ * Flags to customize the behaviour of libfirm.
*
* @author Christian Schaefer
+ *
+ * There are the following groups of flags:
+ * 1. Optimization flags.
+ * a) There is a flag, 'optimize' to turn on/off all optimizations.
+ * b) There are flags for each individual optimization. Some flags turns
+ * transformations in several algorithms on/off.
+ * 2. Normalization flags.
+ * These flags steer transformations of the ir that improve it, as removing
+ * dump Phi nodes (one predecessor, all preds are equal ...), Ids, Tuples ...
+ * 3. Verbosity flags.
+ * a) Flags to steer the level of the information.
+ * b) Flags to steer in which phase information should be dumped.
+ *
*/
#ifndef _IRFLAG_H_
* Default: optimize == 1.
*/
void set_optimize (int value);
-int get_optimize(void);
+int get_optimize(void);
+
+/** This function enables/disables output of information about phases and
+ * controls the verbosity level.
+ *
+ * 0: no output at all.
+ * 1: very short output
+ * >>1: very verbose output.
+ */
+void set_firm_verbosity (int value);
+int get_firm_verbosity (void);
/** Enables/Disables constant folding optimization.
*
*/
void set_opt_constant_folding (int value);
+/** Enables/Disables removal of redundant Loads and Stores.
+ *
+ * - Remove Store that overwrites a just stored value (WAW).
+ * - Remove Store if it stores a value just loaded (WAR with the same value).
+ * - Remove Load that loads a value just saved (RAW with the same value).
+ */
+void set_opt_redundant_LoadStore(int value);
+
/** Enables/Disables constant subexpression elimination.
*
* If opt_cse == 1 perform constant subexpression elimination.
* If opt_global_cse == 1 and opt_cse == 1 perform intra procedure
* constant subexpression elimination for floating nodes. Intra
* procedure cse gets the graph into state "floating". It is necessary
- * to run pre/code motion to get the graph back into state "pinned".
+ * to run pre/code motion to get the graph back into state "op_pin_state_pinned".
* right after a call to local_optimize with global cse turned on.
* Default: opt_global_cse == 0.
*/
void set_opt_global_cse (int value);
+/** Enables/Disables strength reduction.
+ *
+ * If opt_strength_red == 1 perform strength reduction.
+ * See strenth_red.h.
+ *
+ * Default: opt_strength_red = 1;
+ */
+void set_opt_strength_red (int value);
+
+/** Enables/Disables output of information about strength reduction.
+ */
+void set_opt_strength_red_verbose (int value);
+
/** Enables/Disables unreachable code elimination.
+ *
+ * If set, evaluate conditions of conditional branch and replace the
+ * branch with a Jmp/Bad Tuple.
*
* If opt_unreachable_code == 1 replace nodes (except Block,
* Phi and Tuple) with a Bad predecessor by the Bad node.
*/
void set_opt_dyn_meth_dispatch (int value);
+/** Enable/Disable optimization of tail-recursion calls.
+ *
+ * This flag enables/disables the optimization tail-recursion call.
+ * If the flag is turned on tail-recursion calls are optimized into loops.
+ */
+void set_opt_tail_recursion(int value);
+void set_opt_tail_recursion_verbose(int value);
+
+void set_opt_fragile_ops(int value);
+
+
/** Enable/Disable normalizations of the firm representation.
*
* This flag guards transformations that normalize the firm representation
*/
void set_opt_normalize (int value);
-/** Enable/Disable optimization of tail-recursion calls.
- *
- * This flag enables/disables the optimization tail-recursion call.
- * If the flag is turned on tail-recursion calls are optimized into loops.
- */
-void set_opt_tail_recursion(int value);
+
+/** Enable/Disable precise exception context. */
+void set_opt_precise_exc_context(int value);
/**
* Save the current optimization state.