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//===- OptEmitter.cpp - Helper for emitting options -------------*- 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
//
//===----------------------------------------------------------------------===//
#include "OptEmitter.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/OptionStrCmp.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
// Returns true if A is ordered before B.
bool llvm::IsOptionRecordsLess(const Record *A, const Record *B) {
if (A == B)
return false;
// Sentinel options precede all others and are only ordered by precedence.
const Record *AKind = A->getValueAsDef("Kind");
const Record *BKind = B->getValueAsDef("Kind");
bool ASent = AKind->getValueAsBit("Sentinel");
bool BSent = BKind->getValueAsBit("Sentinel");
if (ASent != BSent)
return ASent;
std::vector<StringRef> APrefixes = A->getValueAsListOfStrings("Prefixes");
std::vector<StringRef> BPrefixes = B->getValueAsListOfStrings("Prefixes");
// Compare options by name, unless they are sentinels.
if (!ASent) {
if (int Cmp = StrCmpOptionName(A->getValueAsString("Name"),
B->getValueAsString("Name")))
return Cmp < 0;
if (int Cmp = StrCmpOptionPrefixes(APrefixes, BPrefixes))
return Cmp < 0;
}
// Then by the kind precedence;
int APrec = AKind->getValueAsInt("Precedence");
int BPrec = BKind->getValueAsInt("Precedence");
if (APrec == BPrec && APrefixes == BPrefixes) {
PrintError(A->getLoc(), Twine("Option is equivalent to"));
PrintError(B->getLoc(), Twine("Other defined here"));
PrintFatalError("Equivalent Options found.");
}
return APrec < BPrec;
}
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