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127 lines
6.8 KiB
C
127 lines
6.8 KiB
C
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// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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// DESCRIPTION: Verilator: Peephole optimizations over DfgGraph
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//
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// Code available from: https://verilator.org
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//
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//*************************************************************************
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//
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// Copyright 2003-2022 by Wilson Snyder. This program is free software; you
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// can redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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//
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//*************************************************************************
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#ifndef VERILATOR_V3DFGPEEPHOLE_H_
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#define VERILATOR_V3DFGPEEPHOLE_H_
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#include "config_build.h"
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#include <V3Stats.h>
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#define _FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, arg) macro(arg, #arg)
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// clang-format off
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#define FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION(macro) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, SWAP_CONST_IN_COMMUTATIVE_BINARY) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, SWAP_NOT_IN_COMMUTATIVE_BINARY) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, SWAP_VAR_IN_COMMUTATIVE_BINARY) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_BITWISE_OP_THROUGH_CONCAT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_COMPARE_OP_THROUGH_CONCAT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_WIDTH_ONE_REDUCTION) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_REDUCTION_THROUGH_COND_WITH_CONST_BRANCH) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_REDUCTION_OF_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_EXTEND) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_NOT_THROUGH_COND) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_NOT_NOT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NOT_NEQ) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NOT_OF_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_AND_OF_NOT_AND_NOT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_AND_OF_CONST_AND_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_AND_WITH_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_AND_WITH_ONES) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_CONTRADICTORY_AND) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_OF_NOT_AND_NOT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_OF_NOT_AND_NEQ) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_OF_CONCAT_ZERO_LHS_AND_CONCAT_RHS_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_OF_CONCAT_LHS_ZERO_AND_CONCAT_ZERO_RHS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_OF_CONST_AND_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_OR_WITH_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_OR_WITH_ONES) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_TAUTOLOGICAL_OR) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_SUB_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_SUB_WITH_NOT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_REDUNDANT_ZEXT_ON_RHS_OF_SHIFT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_EQ_OF_CONST_AND_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_FULL_WIDTH_SEL) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_SEL_FROM_RHS_OF_CONCAT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_SEL_FROM_LHS_OF_CONCAT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_SEL_THROUGH_CONCAT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_SEL_THROUGH_REPLICATE) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_SEL_THROUGH_NOT) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_SEL_FROM_SEL) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_SEL_THROUGH_COND) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_SEL_THROUGH_SHIFTL) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_SEL_FROM_CONST) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_CONCAT_OF_CONSTS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NESTED_CONCAT_OF_CONSTS_ON_LHS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NESTED_CONCAT_OF_CONSTS_ON_RHS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_CONCAT_ZERO_AND_SEL_TOP_WITH_SHIFTR) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_CONCAT_SEL_BOTTOM_AND_ZERO_WITH_SHIFTL) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PUSH_CONCAT_THROUGH_NOTS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_CONCAT_OF_ADJOINING_SELS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NESTED_CONCAT_OF_ADJOINING_SELS_ON_LHS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_NESTED_CONCAT_OF_ADJOINING_SELS_ON_RHS) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_COND_WITH_FALSE_CONDITION) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REMOVE_COND_WITH_TRUE_CONDITION) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, SWAP_COND_WITH_NOT_CONDITION) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, SWAP_COND_WITH_NEQ_CONDITION) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, PULL_NOTS_THROUGH_COND) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_COND_WITH_THEN_BRANCH_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_COND_WITH_THEN_BRANCH_ONES) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_COND_WITH_ELSE_BRANCH_ZERO) \
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_FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION_APPLY(macro, REPLACE_COND_WITH_ELSE_BRANCH_ONES)
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// clang-format on
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class VDfgPeepholePattern final {
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public:
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enum en : unsigned {
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#define OPTIMIZATION_ID(id, name) id,
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FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION(OPTIMIZATION_ID)
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#undef OPTIMIZATION_ID
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_ENUM_END
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};
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enum en m_e;
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const char* ascii() const {
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static const char* const names[] = {
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#define OPTIMIZATION_NAME(id, name) name,
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FOR_EACH_DFG_PEEPHOLE_OPTIMIZATION(OPTIMIZATION_NAME)
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#undef OPTIMIZATION_NAME
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"_ENUM_END" //
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};
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return names[m_e];
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}
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// cppcheck-suppress noExplicitConstructor
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VDfgPeepholePattern(en _e)
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: m_e{_e} {}
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operator en() const { return m_e; }
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};
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struct V3DfgPeepholeContext final {
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const std::string m_label; // Label to apply to stats
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// Enable flags for each optimization
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bool m_enabled[VDfgPeepholePattern::_ENUM_END];
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// Count of applications for each optimization (for statistics)
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VDouble0 m_count[VDfgPeepholePattern::_ENUM_END];
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V3DfgPeepholeContext(const std::string& label);
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~V3DfgPeepholeContext();
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};
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#endif
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