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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- HotnessThresholdParser.h - Parser for hotness threshold --*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | /// |
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| 9 | /// \file |
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| 10 | /// This file implements a simple parser to decode commandline option for |
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| 11 | /// remarks hotness threshold that supports both int and a special 'auto' value. |
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| 12 | /// |
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| 13 | //===----------------------------------------------------------------------===// |
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| 14 | |||
| 15 | #ifndef LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |
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| 16 | #define LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |
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| 17 | |||
| 18 | #include "llvm/Support/CommandLine.h" |
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| 19 | #include <optional> |
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| 20 | |||
| 21 | namespace llvm { |
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| 22 | namespace remarks { |
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| 23 | |||
| 24 | // Parse remarks hotness threshold argument value. |
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| 25 | // Valid option values are |
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| 26 | // 1. integer: manually specified threshold; or |
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| 27 | // 2. string 'auto': automatically get threshold from profile summary. |
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| 28 | // |
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| 29 | // Return std::nullopt Optional if 'auto' is specified, indicating the value |
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| 30 | // will be filled later during PSI. |
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| 31 | inline Expected<std::optional<uint64_t>> parseHotnessThresholdOption(StringRef Arg) { |
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| 32 | if (Arg == "auto") |
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| 33 | return std::nullopt; |
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| 34 | |||
| 35 | int64_t Val; |
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| 36 | if (Arg.getAsInteger(10, Val)) |
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| 37 | return createStringError(llvm::inconvertibleErrorCode(), |
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| 38 | "Not an integer: %s", Arg.data()); |
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| 39 | |||
| 40 | // Negative integer effectively means no threshold |
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| 41 | return Val < 0 ? 0 : Val; |
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| 42 | } |
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| 43 | |||
| 44 | // A simple CL parser for '*-remarks-hotness-threshold=' |
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| 45 | class HotnessThresholdParser : public cl::parser<std::optional<uint64_t>> { |
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| 46 | public: |
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| 47 | HotnessThresholdParser(cl::Option &O) : cl::parser<std::optional<uint64_t>>(O) {} |
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| 48 | |||
| 49 | bool parse(cl::Option &O, StringRef ArgName, StringRef Arg, |
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| 50 | std::optional<uint64_t> &V) { |
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| 51 | auto ResultOrErr = parseHotnessThresholdOption(Arg); |
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| 52 | if (!ResultOrErr) |
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| 53 | return O.error("Invalid argument '" + Arg + |
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| 54 | "', only integer or 'auto' is supported."); |
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| 55 | |||
| 56 | V = *ResultOrErr; |
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| 57 | return false; |
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| 58 | } |
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| 59 | }; |
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| 60 | |||
| 61 | } // namespace remarks |
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| 62 | } // namespace llvm |
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| 63 | #endif // LLVM_REMARKS_HOTNESSTHRESHOLDPARSER_H |