X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firflag.h;h=1489253f22a0cb690162918aa54aea3348d88a95;hb=eda9d668d0e8c8246015b4c5e743316a6a835a23;hp=c32bf82d69700b06898d606281bf78d65f1e1dd1;hpb=3ee397d14a0564b2d7e2e141bc1d3aca5c011f0f;p=libfirm diff --git a/ir/ir/irflag.h b/ir/ir/irflag.h index c32bf82d6..1489253f2 100644 --- a/ir/ir/irflag.h +++ b/ir/ir/irflag.h @@ -1,22 +1,30 @@ /* - * 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. + * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * + * This file is part of libFirm. + * + * This file may be distributed and/or modified under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation and appearing in the file LICENSE.GPL included in the + * packaging of this file. + * + * Licensees holding valid libFirm Professional Edition licenses may use + * this file in accordance with the libFirm Commercial License. + * Agreement provided with the Software. + * + * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE + * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE. */ /** - * @file irflag.h - * + * @file + * @brief Flags to control optimizations. + * @author Christian Schaefer, Goetz Lindenmaier, Michael Beck + * @version $Id$ + * @summary * 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. @@ -24,15 +32,15 @@ * 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 ... + * dump Phi nodes (one predecessor, all predecessors 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. * 4. Verification flag * This one controls the behavior of node and type verifications */ -#ifndef _IRFLAG_H_ -#define _IRFLAG_H_ +#ifndef FIRM_IR_IRFLAG_H +#define FIRM_IR_IRFLAG_H #include "firm_types.h" @@ -66,8 +74,6 @@ int get_firm_verbosity (void); * - constant expression evaluation (2 + 5 ==> 7, 3 < 2 ==> false) * - algebraic simplification (a * 0 ==> 0, a or a ==> a) * - simplification of tests ( !(a < b) ==> (a >= b)) - * - refining the memory representation - * - remove store after load * Default: opt_constant_folding == 1. */ void set_opt_constant_folding (int value); @@ -157,9 +163,6 @@ void set_opt_control_flow_weak_simplification(int value); /** Enables/Disables strong if and loop simplification (in optimize_cf). */ void set_opt_control_flow_strong_simplification(int value); -/** Enables/Disables removal of critical control flow edges. */ -void set_opt_critical_edges(int value); - /** Enables/Disables reassociation. * * If opt_reassociation == 1 reassociation is performed. @@ -178,11 +181,12 @@ void set_opt_dead_node_elimination (int value); * * If opt_dead_method_elimination == 1 methods never called are * removed. - * Default: opt_dead_method_elimination == 1. */ + * 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. +/** Enable/Disables method inlining. * * If opt_inline == 1 the inlining transformation is performed. */ @@ -239,14 +243,14 @@ void set_opt_fragile_ops(int value); void set_opt_if_conversion(int value); /** - * Enable/Disable real function call optimization. + * Enable/Disable function call optimization. * - * Real function call optimization detects "real functions" and - * allows the floating of Call nodes. A "real function" is one that + * Function call optimization detects const and pure functions and + * allows the CSE of Call nodes. A const function is one that * do only evaluate it's parameters and did not read or write memory - * to compute its results. + * to compute its results. Pure functions are allowed to read global memory. */ -void set_opt_real_function_call(int value); +void set_opt_function_call(int value); /** * Enable/Disable Confirm node removal during local optimization. @@ -263,7 +267,7 @@ void set_opt_scalar_replacement_verbose(int value); * Enable/Disable Null exception in Load and Store nodes only. * * If enabled, only Null pointer exception can occur at Load and - * store nodes. If it can be proven that the address input of these + * store nodes. If it can be proved that the address input of these * nodes is non-null, the exception edge can safely be removed. * If disabled, other exceptions (like unaligned access, read-only memory, * etc.) can occur. @@ -279,7 +283,7 @@ void set_opt_ldst_only_null_ptr_exceptions(int value); * pointers can only occur as input to Sel nodes. * If Null pointers are the only source for exceptions in Load and * Store nodes (as typical in high level languages), we can eliminate - * exception edges form Load and Store as we can prove that the Sel + * exception edges from Load and Store when can prove that the Sel * nodes representing the Load/Store address have non-null inputs. * Enabling this flag enables this elimination. * @@ -290,23 +294,35 @@ void set_opt_ldst_only_null_ptr_exceptions(int value); */ void set_opt_sel_based_null_check_elim(int value); +/** + * Enable/Disable Automatic construction of Sync nodes during + * Firm construction. + * + * If this flags is set, sequential non-volatile Loads are automatically + * rearranged so that they can be executed in parallel by creating Sync nodes. + * + * This flags should be set for Java style languages. + */ +void set_opt_auto_create_sync(int value); + /** Enable/Disable normalizations of the firm representation. * - * This flag guards transformations that normalize 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 + * 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. + * default: ON + * + * @note ATTENTION: not all such transformations are guarded by a flag. */ void set_opt_normalize (int value); /** Enable/Disable precise exception context. * - * If enabled, all exceptions form a barrier for value, as in the + * If enabled, all exceptions form a barrier for values, as in the * following example: * * @code @@ -321,6 +337,20 @@ void set_opt_normalize (int value); */ void set_opt_precise_exc_context(int value); +/** Enable/Disable Alias analysis. + * + * If enabled, memory disambiguation by alias analysis is used. + */ +void set_opt_alias_analysis(int value); + +/** Enable/Disable closed world assumption. + * + * If enabled, optimizations expect to know the "whole world", i.e. no + * external types or callers exist. + * This enables some powerful optimizations. + */ +void set_opt_closed_world(int value); + /** * Save the current optimization state. */ @@ -346,11 +376,11 @@ typedef enum _firm_verification_t { FIRM_VERIFICATION_ERROR_ONLY = 3 /**< do node verification, but NEVER do assert nor report */ } firm_verification_t; -/** Select verification of nodes. +/** Select verification of IR nodes and types. * * Per default the verification is in mode NODE_VERIFICATION_ASSERT. * Turn the verification off during development to check partial implementations. */ void do_node_verification(firm_verification_t mode); -#endif /* _IRFLAG_H_ */ +#endif