| //===- HotnessThresholdParser.h - Parser for hotness threshold --*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// This file implements a simple parser to decode commandline option for |
| /// remarks hotness threshold that supports both int and a special 'auto' value. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |
| #define LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |
| |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/Support/CommandLine.h" |
| |
| namespace llvm { |
| namespace remarks { |
| |
| // Parse remarks hotness threshold argument value. |
| // Valid option values are |
| // 1. integer: manually specified threshold; or |
| // 2. string 'auto': automatically get threshold from profile summary. |
| // |
| // Return None Optional if 'auto' is specified, indicating the value will |
| // be filled later during PSI. |
| inline Expected<Optional<uint64_t>> parseHotnessThresholdOption(StringRef Arg) { |
| if (Arg == "auto") |
| return None; |
| |
| int64_t Val; |
| if (Arg.getAsInteger(10, Val)) |
| return createStringError(llvm::inconvertibleErrorCode(), |
| "Not an integer: %s", Arg.data()); |
| |
| // Negative integer effectively means no threshold |
| return Val < 0 ? 0 : Val; |
| } |
| |
| // A simple CL parser for '*-remarks-hotness-threshold=' |
| class HotnessThresholdParser : public cl::parser<Optional<uint64_t>> { |
| public: |
| HotnessThresholdParser(cl::Option &O) : cl::parser<Optional<uint64_t>>(O) {} |
| |
| bool parse(cl::Option &O, StringRef ArgName, StringRef Arg, |
| Optional<uint64_t> &V) { |
| auto ResultOrErr = parseHotnessThresholdOption(Arg); |
| if (!ResultOrErr) |
| return O.error("Invalid argument '" + Arg + |
| "', only integer or 'auto' is supported."); |
| |
| V = *ResultOrErr; |
| return false; |
| } |
| }; |
| |
| } // namespace remarks |
| } // namespace llvm |
| #endif // LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |