64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
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//===- HotnessThresholdParser.h - Parser for hotness threshold --*- C++ -*-===//
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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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///
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/// \file
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/// This file implements a simple parser to decode commandline option for
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/// remarks hotness threshold that supports both int and a special 'auto' value.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H
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#define LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H
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#include "llvm/ADT/Optional.h"
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#include "llvm/Support/CommandLine.h"
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namespace llvm {
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namespace remarks {
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// Parse remarks hotness threshold argument value.
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// Valid option values are
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// 1. integer: manually specified threshold; or
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// 2. string 'auto': automatically get threshold from profile summary.
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//
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// Return None Optional if 'auto' is specified, indicating the value will
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// be filled later during PSI.
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inline Expected<Optional<uint64_t>> parseHotnessThresholdOption(StringRef Arg) {
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if (Arg == "auto")
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return None;
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int64_t Val;
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if (Arg.getAsInteger(10, Val))
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return createStringError(llvm::inconvertibleErrorCode(),
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"Not an integer: %s", Arg.data());
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// Negative integer effectively means no threshold
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return Val < 0 ? 0 : Val;
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}
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// A simple CL parser for '*-remarks-hotness-threshold='
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class HotnessThresholdParser : public cl::parser<Optional<uint64_t>> {
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public:
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HotnessThresholdParser(cl::Option &O) : cl::parser<Optional<uint64_t>>(O) {}
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bool parse(cl::Option &O, StringRef ArgName, StringRef Arg,
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Optional<uint64_t> &V) {
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auto ResultOrErr = parseHotnessThresholdOption(Arg);
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if (!ResultOrErr)
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return O.error("Invalid argument '" + Arg +
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"', only integer or 'auto' is supported.");
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V = *ResultOrErr;
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return false;
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}
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};
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} // namespace remarks
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} // namespace llvm
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#endif // LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H
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