07bb29d8ff
This avoid rediscovering this table when reading each options, providing a sensible 2% speedup when processing and empty file, and a measurable speedup on typical workloads, see: This is optional, the legacy, on-the-fly, approach can still be used through the GenericOptTable class, while the new one is used through PrecomputedOptTable. https://llvm-compile-time-tracker.com/compare.php?from=4da6cb3202817ee2897d6b690e4af950459caea4&to=19a492b704e8f5c1dea120b9c0d3859bd78796be&stat=instructions:u Differential Revision: https://reviews.llvm.org/D140800
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//===--- DriverOptions.cpp - Driver Options Table -------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Driver/Options.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Option/Option.h"
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#include <cassert>
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using namespace clang::driver;
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using namespace clang::driver::options;
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using namespace llvm::opt;
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#define OPTTABLE_VALUES_CODE
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#include "clang/Driver/Options.inc"
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#undef OPTTABLE_VALUES_CODE
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#define PREFIX(NAME, VALUE) \
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static constexpr llvm::StringLiteral NAME##_init[] = VALUE; \
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static constexpr llvm::ArrayRef<llvm::StringLiteral> NAME( \
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NAME##_init, std::size(NAME##_init) - 1);
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#include "clang/Driver/Options.inc"
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#undef PREFIX
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static constexpr const llvm::StringLiteral PrefixTable_init[] =
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#define PREFIX_UNION(VALUES) VALUES
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#include "clang/Driver/Options.inc"
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#undef PREFIX_UNION
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;
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static constexpr const llvm::ArrayRef<llvm::StringLiteral>
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PrefixTable(PrefixTable_init, std::size(PrefixTable_init) - 1);
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static constexpr OptTable::Info InfoTable[] = {
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#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
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HELPTEXT, METAVAR, VALUES) \
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{PREFIX, NAME, HELPTEXT, METAVAR, OPT_##ID, Option::KIND##Class, \
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PARAM, FLAGS, OPT_##GROUP, OPT_##ALIAS, ALIASARGS, VALUES},
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#include "clang/Driver/Options.inc"
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#undef OPTION
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};
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namespace {
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class DriverOptTable : public PrecomputedOptTable {
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public:
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DriverOptTable() : PrecomputedOptTable(InfoTable, PrefixTable) {}
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};
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}
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const llvm::opt::OptTable &clang::driver::getDriverOptTable() {
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static DriverOptTable Table;
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return Table;
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}
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