85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
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//===- OptEmitter.cpp - Helper for emitting options.----------- -----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "OptEmitter.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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#include <cctype>
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#include <cstring>
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namespace llvm {
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// Ordering on Info. The logic should match with the consumer-side function in
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// llvm/Option/OptTable.h.
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// FIXME: Make this take StringRefs instead of null terminated strings to
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// simplify callers.
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static int StrCmpOptionName(const char *A, const char *B) {
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const char *X = A, *Y = B;
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char a = tolower(*A), b = tolower(*B);
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while (a == b) {
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if (a == '\0')
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return strcmp(A, B);
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a = tolower(*++X);
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b = tolower(*++Y);
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}
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if (a == '\0') // A is a prefix of B.
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return 1;
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if (b == '\0') // B is a prefix of A.
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return -1;
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// Otherwise lexicographic.
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return (a < b) ? -1 : 1;
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}
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int CompareOptionRecords(Record *const *Av, Record *const *Bv) {
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const Record *A = *Av;
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const Record *B = *Bv;
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// Sentinel options precede all others and are only ordered by precedence.
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bool ASent = A->getValueAsDef("Kind")->getValueAsBit("Sentinel");
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bool BSent = B->getValueAsDef("Kind")->getValueAsBit("Sentinel");
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if (ASent != BSent)
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return ASent ? -1 : 1;
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// Compare options by name, unless they are sentinels.
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if (!ASent)
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if (int Cmp = StrCmpOptionName(A->getValueAsString("Name").str().c_str(),
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B->getValueAsString("Name").str().c_str()))
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return Cmp;
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if (!ASent) {
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std::vector<StringRef> APrefixes = A->getValueAsListOfStrings("Prefixes");
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std::vector<StringRef> BPrefixes = B->getValueAsListOfStrings("Prefixes");
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for (std::vector<StringRef>::const_iterator APre = APrefixes.begin(),
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AEPre = APrefixes.end(),
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BPre = BPrefixes.begin(),
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BEPre = BPrefixes.end();
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APre != AEPre && BPre != BEPre; ++APre, ++BPre) {
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if (int Cmp = StrCmpOptionName(APre->str().c_str(), BPre->str().c_str()))
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return Cmp;
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}
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}
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// Then by the kind precedence;
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int APrec = A->getValueAsDef("Kind")->getValueAsInt("Precedence");
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int BPrec = B->getValueAsDef("Kind")->getValueAsInt("Precedence");
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if (APrec == BPrec && A->getValueAsListOfStrings("Prefixes") ==
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B->getValueAsListOfStrings("Prefixes")) {
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PrintError(A->getLoc(), Twine("Option is equivalent to"));
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PrintError(B->getLoc(), Twine("Other defined here"));
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PrintFatalError("Equivalent Options found.");
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}
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return APrec < BPrec ? -1 : 1;
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}
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} // namespace llvm
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