52 lines · cpp
1//===- OptEmitter.cpp - Helper for emitting options -------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "OptEmitter.h"10#include "llvm/ADT/Twine.h"11#include "llvm/Support/OptionStrCmp.h"12#include "llvm/TableGen/Error.h"13#include "llvm/TableGen/Record.h"14 15// Returns true if A is ordered before B.16bool llvm::IsOptionRecordsLess(const Record *A, const Record *B) {17 if (A == B)18 return false;19 20 // Sentinel options precede all others and are only ordered by precedence.21 const Record *AKind = A->getValueAsDef("Kind");22 const Record *BKind = B->getValueAsDef("Kind");23 24 bool ASent = AKind->getValueAsBit("Sentinel");25 bool BSent = BKind->getValueAsBit("Sentinel");26 if (ASent != BSent)27 return ASent;28 29 std::vector<StringRef> APrefixes = A->getValueAsListOfStrings("Prefixes");30 std::vector<StringRef> BPrefixes = B->getValueAsListOfStrings("Prefixes");31 32 // Compare options by name, unless they are sentinels.33 if (!ASent) {34 if (int Cmp = StrCmpOptionName(A->getValueAsString("Name"),35 B->getValueAsString("Name")))36 return Cmp < 0;37 38 if (int Cmp = StrCmpOptionPrefixes(APrefixes, BPrefixes))39 return Cmp < 0;40 }41 42 // Then by the kind precedence;43 int APrec = AKind->getValueAsInt("Precedence");44 int BPrec = BKind->getValueAsInt("Precedence");45 if (APrec == BPrec && APrefixes == BPrefixes) {46 PrintError(A->getLoc(), Twine("Option is equivalent to"));47 PrintError(B->getLoc(), Twine("Other defined here"));48 PrintFatalError("Equivalent Options found.");49 }50 return APrec < BPrec;51}52