fa3d789df1
Refactor of the llvm-tblgen source into: - a "Basic" library, which contains the bare minimum utilities to build `llvm-min-tablegen` - a "Common" library which contains all of the helpers for TableGen backends. Such helpers can be shared by more than one backend, and even unit tested (e.g. CodeExpander is, maybe we can add more over time) Fixes #80647
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
//===- 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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