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//===- OptEmitter.cpp - Helper for emitting options.----------- -----------===//
//
// 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/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include <cctype>
#include <cstring>
namespace llvm {
// Ordering on Info. The logic should match with the consumer-side function in
// llvm/Option/OptTable.h.
// FIXME: Make this take StringRefs instead of null terminated strings to
// simplify callers.
static int StrCmpOptionName(const char *A, const char *B) {
const char *X = A, *Y = B;
char a = tolower(*A), b = tolower(*B);
while (a == b) {
if (a == '\0')
return strcmp(A, B);
a = tolower(*++X);
b = tolower(*++Y);
}
if (a == '\0') // A is a prefix of B.
return 1;
if (b == '\0') // B is a prefix of A.
return -1;
// Otherwise lexicographic.
return (a < b) ? -1 : 1;
}
int CompareOptionRecords(Record *const *Av, Record *const *Bv) {
const Record *A = *Av;
const Record *B = *Bv;
// Sentinel options precede all others and are only ordered by precedence.
bool ASent = A->getValueAsDef("Kind")->getValueAsBit("Sentinel");
bool BSent = B->getValueAsDef("Kind")->getValueAsBit("Sentinel");
if (ASent != BSent)
return ASent ? -1 : 1;
// Compare options by name, unless they are sentinels.
if (!ASent)
if (int Cmp = StrCmpOptionName(A->getValueAsString("Name").str().c_str(),
B->getValueAsString("Name").str().c_str()))
return Cmp;
if (!ASent) {
std::vector<StringRef> APrefixes = A->getValueAsListOfStrings("Prefixes");
std::vector<StringRef> BPrefixes = B->getValueAsListOfStrings("Prefixes");
for (std::vector<StringRef>::const_iterator APre = APrefixes.begin(),
AEPre = APrefixes.end(),
BPre = BPrefixes.begin(),
BEPre = BPrefixes.end();
APre != AEPre && BPre != BEPre; ++APre, ++BPre) {
if (int Cmp = StrCmpOptionName(APre->str().c_str(), BPre->str().c_str()))
return Cmp;
}
}
// Then by the kind precedence;
int APrec = A->getValueAsDef("Kind")->getValueAsInt("Precedence");
int BPrec = B->getValueAsDef("Kind")->getValueAsInt("Precedence");
if (APrec == BPrec && A->getValueAsListOfStrings("Prefixes") ==
B->getValueAsListOfStrings("Prefixes")) {
PrintError(A->getLoc(), Twine("Option is equivalent to"));
PrintError(B->getLoc(), Twine("Other defined here"));
PrintFatalError("Equivalent Options found.");
}
return APrec < BPrec ? -1 : 1;
}
} // namespace llvm
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