Imported Upstream version 5.18.0.247

Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190

external/llvm/utils/TableGen/SubtargetFeatureInfo.cpp

@@ -1,163 +0,0 @@
-//===- SubtargetFeatureInfo.cpp - Helpers for subtarget features ----------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "SubtargetFeatureInfo.h"
-
-#include "Types.h"
-#include "llvm/TableGen/Record.h"
-
-#include <map>
-
-using namespace llvm;
-
-#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
-LLVM_DUMP_METHOD void SubtargetFeatureInfo::dump() const {
-  errs() << getEnumName() << " " << Index << "\n" << *TheDef;
-}
-#endif
-
-std::vector<std::pair<Record *, SubtargetFeatureInfo>>
-SubtargetFeatureInfo::getAll(const RecordKeeper &Records) {
-  std::vector<std::pair<Record *, SubtargetFeatureInfo>> SubtargetFeatures;
-  std::vector<Record *> AllPredicates =
-      Records.getAllDerivedDefinitions("Predicate");
-  for (Record *Pred : AllPredicates) {
-    // Ignore predicates that are not intended for the assembler.
-    //
-    // The "AssemblerMatcherPredicate" string should be promoted to an argument
-    // if we re-use the machinery for non-assembler purposes in future.
-    if (!Pred->getValueAsBit("AssemblerMatcherPredicate"))
-      continue;
-
-    if (Pred->getName().empty())
-      PrintFatalError(Pred->getLoc(), "Predicate has no name!");
-
-    SubtargetFeatures.emplace_back(
-        Pred, SubtargetFeatureInfo(Pred, SubtargetFeatures.size()));
-  }
-  return SubtargetFeatures;
-}
-
-void SubtargetFeatureInfo::emitSubtargetFeatureFlagEnumeration(
-    SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS) {
-  OS << "// Flags for subtarget features that participate in "
-     << "instruction matching.\n";
-  OS << "enum SubtargetFeatureFlag : "
-     << getMinimalTypeForEnumBitfield(SubtargetFeatures.size()) << " {\n";
-  for (const auto &SF : SubtargetFeatures) {
-    const SubtargetFeatureInfo &SFI = SF.second;
-    OS << "  " << SFI.getEnumName() << " = (1ULL << " << SFI.Index << "),\n";
-  }
-  OS << "  Feature_None = 0\n";
-  OS << "};\n\n";
-}
-
-void SubtargetFeatureInfo::emitSubtargetFeatureBitEnumeration(
-    SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS) {
-  OS << "// Bits for subtarget features that participate in "
-     << "instruction matching.\n";
-  OS << "enum SubtargetFeatureBits : "
-     << getMinimalTypeForRange(SubtargetFeatures.size()) << " {\n";
-  for (const auto &SF : SubtargetFeatures) {
-    const SubtargetFeatureInfo &SFI = SF.second;
-    OS << "  " << SFI.getEnumBitName() << " = " << SFI.Index << ",\n";
-  }
-  OS << "};\n\n";
-}
-
-void SubtargetFeatureInfo::emitNameTable(
-    SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS) {
-  // Need to sort the name table so that lookup by the log of the enum value
-  // gives the proper name. More specifically, for a feature of value 1<<n,
-  // SubtargetFeatureNames[n] should be the name of the feature.
-  uint64_t IndexUB = 0;
-  for (const auto &SF : SubtargetFeatures)
-    if (IndexUB <= SF.second.Index)
-      IndexUB = SF.second.Index+1;
-
-  std::vector<std::string> Names;
-  if (IndexUB > 0)
-    Names.resize(IndexUB);
-  for (const auto &SF : SubtargetFeatures)
-    Names[SF.second.Index] = SF.second.getEnumName();
-
-  OS << "static const char *SubtargetFeatureNames[] = {\n";
-  for (uint64_t I = 0; I < IndexUB; ++I)
-    OS << "  \"" << Names[I] << "\",\n";
-
-  // A small number of targets have no predicates. Null terminate the array to
-  // avoid a zero-length array.
-  OS << "  nullptr\n"
-     << "};\n\n";
-}
-
-void SubtargetFeatureInfo::emitComputeAvailableFeatures(
-    StringRef TargetName, StringRef ClassName, StringRef FuncName,
-    SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS,
-    StringRef ExtraParams) {
-  OS << "PredicateBitset " << TargetName << ClassName << "::\n"
-     << FuncName << "(const " << TargetName << "Subtarget *Subtarget";
-  if (!ExtraParams.empty())
-    OS << ", " << ExtraParams;
-  OS << ") const {\n";
-  OS << "  PredicateBitset Features;\n";
-  for (const auto &SF : SubtargetFeatures) {
-    const SubtargetFeatureInfo &SFI = SF.second;
-
-    OS << "  if (" << SFI.TheDef->getValueAsString("CondString") << ")\n";
-    OS << "    Features[" << SFI.getEnumBitName() << "] = 1;\n";
-  }
-  OS << "  return Features;\n";
-  OS << "}\n\n";
-}
-
-void SubtargetFeatureInfo::emitComputeAssemblerAvailableFeatures(
-    StringRef TargetName, StringRef ClassName, StringRef FuncName,
-    SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS) {
-  OS << "uint64_t " << TargetName << ClassName << "::\n"
-     << FuncName << "(const FeatureBitset& FB) const {\n";
-  OS << "  uint64_t Features = 0;\n";
-  for (const auto &SF : SubtargetFeatures) {
-    const SubtargetFeatureInfo &SFI = SF.second;
-
-    OS << "  if (";
-    std::string CondStorage =
-        SFI.TheDef->getValueAsString("AssemblerCondString");
-    StringRef Conds = CondStorage;
-    std::pair<StringRef, StringRef> Comma = Conds.split(',');
-    bool First = true;
-    do {
-      if (!First)
-        OS << " && ";
-
-      bool Neg = false;
-      StringRef Cond = Comma.first;
-      if (Cond[0] == '!') {
-        Neg = true;
-        Cond = Cond.substr(1);
-      }
-
-      OS << "(";
-      if (Neg)
-        OS << "!";
-      OS << "FB[" << TargetName << "::" << Cond << "])";
-
-      if (Comma.second.empty())
-        break;
-
-      First = false;
-      Comma = Comma.second.split(',');
-    } while (true);
-
-    OS << ")\n";
-    OS << "    Features |= " << SFI.getEnumName() << ";\n";
-  }
-  OS << "  return Features;\n";
-  OS << "}\n\n";
-}