X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firflag.h;h=fc28d11f13ce06b3c9ac0bd2a07370db9df4d821;hb=f9d25133f86594ca2b1f33fb0b41a591ecc9b914;hp=dd8f5edbfa6a375eb882d93f2e7d65a9d2e7ef9b;hpb=c8879bc1f95ab5f25a7a9c9dc27255f7b5bcda7f;p=libfirm diff --git a/ir/ir/irflag.h b/ir/ir/irflag.h index dd8f5edbf..fc28d11f1 100644 --- a/ir/ir/irflag.h +++ b/ir/ir/irflag.h @@ -1,16 +1,44 @@ -/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe -* All rights reserved. -* -* Authors: Christian Schaefer -* -* irflag --- optimization flags -*/ +/* + * Project: libFIRM + * File name: ir/ir/irflag.h + * Purpose: Flags to control optimizations. + * Author: Christian Schaefer, Goetz Lindenmaier + * Modified by: Michael Beck + * Created: + * CVS-ID: $Id$ + * Copyright: (c) 1999-2003 Universität Karlsruhe + * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE. + */ -/* $Id$ */ +/** + * @file irflag.h + * + * Flags to customize the behavior 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_ #define _IRFLAG_H_ +/** + * A container type to load/restore all optimizations + */ +typedef unsigned optimization_state_t; + /** * This function enables/disables optimizations globally. * @@ -18,8 +46,17 @@ * Default: optimize == 1. */ void set_optimize (int value); -/** Returns global optimization setting */ -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. * @@ -32,8 +69,29 @@ int get_optimize (void); * Default: opt_constant_folding == 1. */ void set_opt_constant_folding (int value); -/** Returns constant folding optimization setting. */ -int get_opt_constant_folding (void); + +/** Enables/Disables loop unrolling. + * + * If opt_loop_unrolling == 1 perform loop_unrolling. + * See loop_unrolling.h. + * + * Default: opt_loop_unrolling = 1; + */ +void set_opt_loop_unrolling (int value); + +/** Enables/Disables output of information about loop unrolling. + */ +void set_opt_loop_unrolling_verbose (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). + * - remove Load that loads a value already loaded (RAR) + * - replace Load of constant values with constants (RC) + */ +void set_opt_redundant_LoadStore(int value); /** Enables/Disables constant subexpression elimination. * @@ -41,53 +99,64 @@ int get_opt_constant_folding (void); * Default: opt_cse == 1. */ void set_opt_cse (int value); -/** Returns constant subexpression elimination setting. */ -int get_opt_cse (void); + +/** Returns constant folding optimization setting. */ +int get_opt_cse(void); /** Enables/Disables global 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". - * Default: opt_global_cse == 1. + * 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); -/** Returns global constant subexpression elimination setting. */ -int get_opt_global_cse (void); -/** Enables/Disables unreachble code elimination. +/** 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. * Default: opt_unreachable_code == 1. */ void set_opt_unreachable_code(int value); -/** Returns unreachble code elimination setting. */ -int get_opt_unreachable_code(void); /** Enables/Disables control flow optimizations. * * Performs Straightening, if simplifications and loop simplifications. * Sets all separate control flow flags (control_flow_straightening, - * weak_simplification and strong_simplification). + * weak_simplification, strong_simplification and critical_edges). */ void set_opt_control_flow(int value); /** Enables/Disables Straightening. */ void set_opt_control_flow_straightening(int value); -/** Returns Straightening setting. */ -int get_opt_control_flow_straightening(void); /** Enables/Disables if simplifications in local optimizations. */ void set_opt_control_flow_weak_simplification(int value); -/** Returns if simplifications in local optimizations setting. */ -int get_opt_control_flow_weak_simplification(void); /** Enables/Disables strong if and loop simplification (in optimize_cf). */ void set_opt_control_flow_strong_simplification(int value); -/** Returns strong if and loop simplification setting */ -int get_opt_control_flow_strong_simplification(void); + +/** Enables/Disables removal of critical control flow edges. */ +void set_opt_critical_edges(int value); /** Enables/Disables reassociation. * @@ -95,8 +164,6 @@ int get_opt_control_flow_strong_simplification(void); * Default: opt_reassociation == 1. */ void set_opt_reassociation(int value); -/** Returns reassociation setting. */ -int get_opt_reassociation(void); /** Enables/Disables dead node elimination. * @@ -104,15 +171,118 @@ int get_opt_reassociation(void); * by copying the firm graph. * Default: opt_dead_node_elimination == 1. */ void set_opt_dead_node_elimination (int value); -/** Returns dead node elimination setting. */ -int get_opt_dead_node_elimination (void); + +/** Enables/Disables dead method elimination. + * + * If opt_dead_method_elimination == 1 methods never called are + * removed. + * Default: opt_dead_method_elimination == 1. */ +void set_opt_dead_method_elimination (int value); +void set_opt_dead_method_elimination_verbose (int value); /** Enable/Disables inlining. * * If opt_inline == 1 the inlining transformation is performed. */ void set_opt_inline (int value); -/** Returns inlining setting. */ -int get_opt_inline (void); -#endif +/** Enable/Disable optimization of dynamic method dispatch. + * + * This flag enables/disables the optimization of dynamic method dispatch. + * If the flag is turned on Sel nodes can be replaced by Const nodes representing + * the address of a function. + */ +void set_opt_dyn_meth_dispatch (int value); +int get_opt_dyn_meth_dispatch (void); + +/** Enable/Disable type optimization of cast nodes. + * + * Controls the optimizations in tropt.h. Default: on. + */ +void set_opt_optimize_class_casts (int value); +int get_opt_optimize_class_casts (void); +void set_opt_optimize_class_casts_verbose (int value); +int get_opt_optimize_class_casts_verbose (void); + +/** Restricts the behavior of cast optimization. + * + * If set, downcast are not optimized if they might be + * illegal as in (Super)(Sub) (new Super()). Default: + * 0 == not suppressed. + */ +void set_opt_suppress_downcast_optimization(int value); +int get_opt_suppress_downcast_optimization(void); + +/** 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); + +/** Enable/Disable floating of fragile ops. + * + * This flags enables/disables the floating of fragile operations. + * If this flag is on, fragile operations which are known to NOT raise + * an exception can be place to other basic blocks. + * Otherwise they remain in the block they were created. + */ +void set_opt_fragile_ops(int value); + +/** + * Enable/Disable if conversion. + * + * If conversion tries to turn Conds into Mux nodes to eliminate + * control flow. + */ +void set_opt_if_conversion(int value); + +/** + * Enable/Disable real function call optimization. + * + * Real function call optimization detects "real functions" and + * allows the floating of Call nodes. + */ +void set_opt_real_function_call(int value); + +/** + * Enable/Disable Confirm node removal during local optimization. + */ +void set_opt_remove_Confirm(int value); + +/** + * Enable/Disable scalar replacement optimization. + */ +void set_opt_scalar_replacement(int value); +void set_opt_scalar_replacement_verbose(int value); + +/** Enable/Disable normalizations of the firm representation. + * + * This flag guards transformations that normalize the firm representation + * as removing Ids and Tuples, useless Phis, replacing SymConst(id) by + * Const(entity) and others. + * The transformations guarded by this flag are not guarded by flag + * "optimize". + * Many algorithms operating on firm can not deal with constructs in + * the non-normalized representation. + * default: 1 + * @@@ ATTENTION: not all such transformations are guarded by a flag. + */ +void set_opt_normalize (int value); + + +/** Enable/Disable precise exception context. */ +void set_opt_precise_exc_context(int value); + +/** + * Save the current optimization state. + */ +void save_optimization_state(optimization_state_t *state); + +/** + * Restore the current optimization state. + */ +void restore_optimization_state(const optimization_state_t *state); + +#endif /* _IRFLAG_H_ */