Import LLVM, at r72732.

1 files changed, 576 insertions, 0 deletions

diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
new file mode 100644
index 0000000..aad1be9
--- /dev/null
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -0,0 +1,576 @@
+//===- CodeGenTarget.cpp - CodeGen Target Class Wrapper -------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class wraps target description classes used by the various code
+// generation TableGen backends.  This makes it easier to access the data and
+// provides a single place that needs to check it for validity.  All of these
+// classes throw exceptions on error conditions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenTarget.h"
+#include "CodeGenIntrinsics.h"
+#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Streams.h"
+#include <algorithm>
+using namespace llvm;
+
+static cl::opt<unsigned>
+AsmWriterNum("asmwriternum", cl::init(0),
+             cl::desc("Make -gen-asm-writer emit assembly writer #N"));
+
+/// getValueType - Return the MVT::SimpleValueType that the specified TableGen
+/// record corresponds to.
+MVT::SimpleValueType llvm::getValueType(Record *Rec) {
+  return (MVT::SimpleValueType)Rec->getValueAsInt("Value");
+}
+
+std::string llvm::getName(MVT::SimpleValueType T) {
+  switch (T) {
+  case MVT::Other: return "UNKNOWN";
+  case MVT::i1:    return "MVT::i1";
+  case MVT::i8:    return "MVT::i8";
+  case MVT::i16:   return "MVT::i16";
+  case MVT::i32:   return "MVT::i32";
+  case MVT::i64:   return "MVT::i64";
+  case MVT::i128:  return "MVT::i128";
+  case MVT::iAny:  return "MVT::iAny";
+  case MVT::fAny:  return "MVT::fAny";
+  case MVT::f32:   return "MVT::f32";
+  case MVT::f64:   return "MVT::f64";
+  case MVT::f80:   return "MVT::f80";
+  case MVT::f128:  return "MVT::f128";
+  case MVT::ppcf128:  return "MVT::ppcf128";
+  case MVT::Flag:  return "MVT::Flag";
+  case MVT::isVoid:return "MVT::isVoid";
+  case MVT::v2i8:  return "MVT::v2i8";
+  case MVT::v4i8:  return "MVT::v4i8";
+  case MVT::v2i16: return "MVT::v2i16";
+  case MVT::v8i8:  return "MVT::v8i8";
+  case MVT::v4i16: return "MVT::v4i16";
+  case MVT::v2i32: return "MVT::v2i32";
+  case MVT::v1i64: return "MVT::v1i64";
+  case MVT::v16i8: return "MVT::v16i8";
+  case MVT::v8i16: return "MVT::v8i16";
+  case MVT::v4i32: return "MVT::v4i32";
+  case MVT::v2i64: return "MVT::v2i64";
+  case MVT::v2f32: return "MVT::v2f32";
+  case MVT::v4f32: return "MVT::v4f32";
+  case MVT::v2f64: return "MVT::v2f64";
+  case MVT::v3i32: return "MVT::v3i32";
+  case MVT::v3f32: return "MVT::v3f32";
+  case MVT::iPTR:  return "TLI.getPointerTy()";
+  case MVT::iPTRAny:  return "TLI.getPointerTy()";
+  default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
+  }
+}
+
+std::string llvm::getEnumName(MVT::SimpleValueType T) {
+  switch (T) {
+  case MVT::Other: return "MVT::Other";
+  case MVT::i1:    return "MVT::i1";
+  case MVT::i8:    return "MVT::i8";
+  case MVT::i16:   return "MVT::i16";
+  case MVT::i32:   return "MVT::i32";
+  case MVT::i64:   return "MVT::i64";
+  case MVT::i128:  return "MVT::i128";
+  case MVT::iAny:  return "MVT::iAny";
+  case MVT::fAny:  return "MVT::fAny";
+  case MVT::f32:   return "MVT::f32";
+  case MVT::f64:   return "MVT::f64";
+  case MVT::f80:   return "MVT::f80";
+  case MVT::f128:  return "MVT::f128";
+  case MVT::ppcf128:  return "MVT::ppcf128";
+  case MVT::Flag:  return "MVT::Flag";
+  case MVT::isVoid:return "MVT::isVoid";
+  case MVT::v2i8:  return "MVT::v2i8";
+  case MVT::v4i8:  return "MVT::v4i8";
+  case MVT::v2i16: return "MVT::v2i16";
+  case MVT::v8i8:  return "MVT::v8i8";
+  case MVT::v4i16: return "MVT::v4i16";
+  case MVT::v2i32: return "MVT::v2i32";
+  case MVT::v1i64: return "MVT::v1i64";
+  case MVT::v16i8: return "MVT::v16i8";
+  case MVT::v8i16: return "MVT::v8i16";
+  case MVT::v4i32: return "MVT::v4i32";
+  case MVT::v2i64: return "MVT::v2i64";
+  case MVT::v2f32: return "MVT::v2f32";
+  case MVT::v4f32: return "MVT::v4f32";
+  case MVT::v2f64: return "MVT::v2f64";
+  case MVT::v3i32: return "MVT::v3i32";
+  case MVT::v3f32: return "MVT::v3f32";
+  case MVT::iPTR:  return "MVT::iPTR";
+  case MVT::iPTRAny:  return "MVT::iPTRAny";
+  default: assert(0 && "ILLEGAL VALUE TYPE!"); return "";
+  }
+}
+
+/// getQualifiedName - Return the name of the specified record, with a
+/// namespace qualifier if the record contains one.
+///
+std::string llvm::getQualifiedName(const Record *R) {
+  std::string Namespace = R->getValueAsString("Namespace");
+  if (Namespace.empty()) return R->getName();
+  return Namespace + "::" + R->getName();
+}
+
+
+
+
+/// getTarget - Return the current instance of the Target class.
+///
+CodeGenTarget::CodeGenTarget() {
+  std::vector<Record*> Targets = Records.getAllDerivedDefinitions("Target");
+  if (Targets.size() == 0)
+    throw std::string("ERROR: No 'Target' subclasses defined!");
+  if (Targets.size() != 1)
+    throw std::string("ERROR: Multiple subclasses of Target defined!");
+  TargetRec = Targets[0];
+}
+
+
+const std::string &CodeGenTarget::getName() const {
+  return TargetRec->getName();
+}
+
+std::string CodeGenTarget::getInstNamespace() const {
+  std::string InstNS;
+
+  for (inst_iterator i = inst_begin(), e = inst_end(); i != e; ++i) {
+    InstNS = i->second.Namespace;
+
+    // Make sure not to pick up "TargetInstrInfo" by accidentally getting
+    // the namespace off the PHI instruction or something.
+    if (InstNS != "TargetInstrInfo")
+      break;
+  }
+
+  return InstNS;
+}
+
+Record *CodeGenTarget::getInstructionSet() const {
+  return TargetRec->getValueAsDef("InstructionSet");
+}
+
+/// getAsmWriter - Return the AssemblyWriter definition for this target.
+///
+Record *CodeGenTarget::getAsmWriter() const {
+  std::vector<Record*> LI = TargetRec->getValueAsListOfDefs("AssemblyWriters");
+  if (AsmWriterNum >= LI.size())
+    throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
+  return LI[AsmWriterNum];
+}
+
+void CodeGenTarget::ReadRegisters() const {
+  std::vector<Record*> Regs = Records.getAllDerivedDefinitions("Register");
+  if (Regs.empty())
+    throw std::string("No 'Register' subclasses defined!");
+
+  Registers.reserve(Regs.size());
+  Registers.assign(Regs.begin(), Regs.end());
+}
+
+CodeGenRegister::CodeGenRegister(Record *R) : TheDef(R) {
+  DeclaredSpillSize = R->getValueAsInt("SpillSize");
+  DeclaredSpillAlignment = R->getValueAsInt("SpillAlignment");
+}
+
+const std::string &CodeGenRegister::getName() const {
+  return TheDef->getName();
+}
+
+void CodeGenTarget::ReadRegisterClasses() const {
+  std::vector<Record*> RegClasses =
+    Records.getAllDerivedDefinitions("RegisterClass");
+  if (RegClasses.empty())
+    throw std::string("No 'RegisterClass' subclasses defined!");
+
+  RegisterClasses.reserve(RegClasses.size());
+  RegisterClasses.assign(RegClasses.begin(), RegClasses.end());
+}
+
+std::vector<unsigned char> CodeGenTarget::getRegisterVTs(Record *R) const {
+  std::vector<unsigned char> Result;
+  const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
+  for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
+    const CodeGenRegisterClass &RC = RegisterClasses[i];
+    for (unsigned ei = 0, ee = RC.Elements.size(); ei != ee; ++ei) {
+      if (R == RC.Elements[ei]) {
+        const std::vector<MVT::SimpleValueType> &InVTs = RC.getValueTypes();
+        for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
+          Result.push_back(InVTs[i]);
+      }
+    }
+  }
+  return Result;
+}
+
+
+CodeGenRegisterClass::CodeGenRegisterClass(Record *R) : TheDef(R) {
+  // Rename anonymous register classes.
+  if (R->getName().size() > 9 && R->getName()[9] == '.') {
+    static unsigned AnonCounter = 0;
+    R->setName("AnonRegClass_"+utostr(AnonCounter++));
+  } 
+  
+  std::vector<Record*> TypeList = R->getValueAsListOfDefs("RegTypes");
+  for (unsigned i = 0, e = TypeList.size(); i != e; ++i) {
+    Record *Type = TypeList[i];
+    if (!Type->isSubClassOf("ValueType"))
+      throw "RegTypes list member '" + Type->getName() +
+        "' does not derive from the ValueType class!";
+    VTs.push_back(getValueType(Type));
+  }
+  assert(!VTs.empty() && "RegisterClass must contain at least one ValueType!");
+  
+  std::vector<Record*> RegList = R->getValueAsListOfDefs("MemberList");
+  for (unsigned i = 0, e = RegList.size(); i != e; ++i) {
+    Record *Reg = RegList[i];
+    if (!Reg->isSubClassOf("Register"))
+      throw "Register Class member '" + Reg->getName() +
+            "' does not derive from the Register class!";
+    Elements.push_back(Reg);
+  }
+  
+  std::vector<Record*> SubRegClassList = 
+                        R->getValueAsListOfDefs("SubRegClassList");
+  for (unsigned i = 0, e = SubRegClassList.size(); i != e; ++i) {
+    Record *SubRegClass = SubRegClassList[i];
+    if (!SubRegClass->isSubClassOf("RegisterClass"))
+      throw "Register Class member '" + SubRegClass->getName() +
+            "' does not derive from the RegisterClass class!";
+    SubRegClasses.push_back(SubRegClass);
+  }  
+  
+  // Allow targets to override the size in bits of the RegisterClass.
+  unsigned Size = R->getValueAsInt("Size");
+
+  Namespace = R->getValueAsString("Namespace");
+  SpillSize = Size ? Size : MVT(VTs[0]).getSizeInBits();
+  SpillAlignment = R->getValueAsInt("Alignment");
+  CopyCost = R->getValueAsInt("CopyCost");
+  MethodBodies = R->getValueAsCode("MethodBodies");
+  MethodProtos = R->getValueAsCode("MethodProtos");
+}
+
+const std::string &CodeGenRegisterClass::getName() const {
+  return TheDef->getName();
+}
+
+void CodeGenTarget::ReadLegalValueTypes() const {
+  const std::vector<CodeGenRegisterClass> &RCs = getRegisterClasses();
+  for (unsigned i = 0, e = RCs.size(); i != e; ++i)
+    for (unsigned ri = 0, re = RCs[i].VTs.size(); ri != re; ++ri)
+      LegalValueTypes.push_back(RCs[i].VTs[ri]);
+  
+  // Remove duplicates.
+  std::sort(LegalValueTypes.begin(), LegalValueTypes.end());
+  LegalValueTypes.erase(std::unique(LegalValueTypes.begin(),
+                                    LegalValueTypes.end()),
+                        LegalValueTypes.end());
+}
+
+
+void CodeGenTarget::ReadInstructions() const {
+  std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
+  if (Insts.size() <= 2)
+    throw std::string("No 'Instruction' subclasses defined!");
+
+  // Parse the instructions defined in the .td file.
+  std::string InstFormatName =
+    getAsmWriter()->getValueAsString("InstFormatName");
+
+  for (unsigned i = 0, e = Insts.size(); i != e; ++i) {
+    std::string AsmStr = Insts[i]->getValueAsString(InstFormatName);
+    Instructions.insert(std::make_pair(Insts[i]->getName(),
+                                       CodeGenInstruction(Insts[i], AsmStr)));
+  }
+}
+
+/// getInstructionsByEnumValue - Return all of the instructions defined by the
+/// target, ordered by their enum value.
+void CodeGenTarget::
+getInstructionsByEnumValue(std::vector<const CodeGenInstruction*>
+                                                 &NumberedInstructions) {
+  std::map<std::string, CodeGenInstruction>::const_iterator I;
+  I = getInstructions().find("PHI");
+  if (I == Instructions.end()) throw "Could not find 'PHI' instruction!";
+  const CodeGenInstruction *PHI = &I->second;
+  
+  I = getInstructions().find("INLINEASM");
+  if (I == Instructions.end()) throw "Could not find 'INLINEASM' instruction!";
+  const CodeGenInstruction *INLINEASM = &I->second;
+  
+  I = getInstructions().find("DBG_LABEL");
+  if (I == Instructions.end()) throw "Could not find 'DBG_LABEL' instruction!";
+  const CodeGenInstruction *DBG_LABEL = &I->second;
+  
+  I = getInstructions().find("EH_LABEL");
+  if (I == Instructions.end()) throw "Could not find 'EH_LABEL' instruction!";
+  const CodeGenInstruction *EH_LABEL = &I->second;
+  
+  I = getInstructions().find("GC_LABEL");
+  if (I == Instructions.end()) throw "Could not find 'GC_LABEL' instruction!";
+  const CodeGenInstruction *GC_LABEL = &I->second;
+  
+  I = getInstructions().find("DECLARE");
+  if (I == Instructions.end()) throw "Could not find 'DECLARE' instruction!";
+  const CodeGenInstruction *DECLARE = &I->second;
+  
+  I = getInstructions().find("EXTRACT_SUBREG");
+  if (I == Instructions.end()) 
+    throw "Could not find 'EXTRACT_SUBREG' instruction!";
+  const CodeGenInstruction *EXTRACT_SUBREG = &I->second;
+  
+  I = getInstructions().find("INSERT_SUBREG");
+  if (I == Instructions.end()) 
+    throw "Could not find 'INSERT_SUBREG' instruction!";
+  const CodeGenInstruction *INSERT_SUBREG = &I->second;
+  
+  I = getInstructions().find("IMPLICIT_DEF");
+  if (I == Instructions.end())
+    throw "Could not find 'IMPLICIT_DEF' instruction!";
+  const CodeGenInstruction *IMPLICIT_DEF = &I->second;
+  
+  I = getInstructions().find("SUBREG_TO_REG");
+  if (I == Instructions.end())
+    throw "Could not find 'SUBREG_TO_REG' instruction!";
+  const CodeGenInstruction *SUBREG_TO_REG = &I->second;
+
+  I = getInstructions().find("COPY_TO_REGCLASS");
+  if (I == Instructions.end())
+    throw "Could not find 'COPY_TO_REGCLASS' instruction!";
+  const CodeGenInstruction *COPY_TO_REGCLASS = &I->second;
+
+  // Print out the rest of the instructions now.
+  NumberedInstructions.push_back(PHI);
+  NumberedInstructions.push_back(INLINEASM);
+  NumberedInstructions.push_back(DBG_LABEL);
+  NumberedInstructions.push_back(EH_LABEL);
+  NumberedInstructions.push_back(GC_LABEL);
+  NumberedInstructions.push_back(DECLARE);
+  NumberedInstructions.push_back(EXTRACT_SUBREG);
+  NumberedInstructions.push_back(INSERT_SUBREG);
+  NumberedInstructions.push_back(IMPLICIT_DEF);
+  NumberedInstructions.push_back(SUBREG_TO_REG);
+  NumberedInstructions.push_back(COPY_TO_REGCLASS);
+  for (inst_iterator II = inst_begin(), E = inst_end(); II != E; ++II)
+    if (&II->second != PHI &&
+        &II->second != INLINEASM &&
+        &II->second != DBG_LABEL &&
+        &II->second != EH_LABEL &&
+        &II->second != GC_LABEL &&
+        &II->second != DECLARE &&
+        &II->second != EXTRACT_SUBREG &&
+        &II->second != INSERT_SUBREG &&
+        &II->second != IMPLICIT_DEF &&
+        &II->second != SUBREG_TO_REG &&
+        &II->second != COPY_TO_REGCLASS)
+      NumberedInstructions.push_back(&II->second);
+}
+
+
+/// isLittleEndianEncoding - Return whether this target encodes its instruction
+/// in little-endian format, i.e. bits laid out in the order [0..n]
+///
+bool CodeGenTarget::isLittleEndianEncoding() const {
+  return getInstructionSet()->getValueAsBit("isLittleEndianEncoding");
+}
+
+//===----------------------------------------------------------------------===//
+// ComplexPattern implementation
+//
+ComplexPattern::ComplexPattern(Record *R) {
+  Ty          = ::getValueType(R->getValueAsDef("Ty"));
+  NumOperands = R->getValueAsInt("NumOperands");
+  SelectFunc  = R->getValueAsString("SelectFunc");
+  RootNodes   = R->getValueAsListOfDefs("RootNodes");
+
+  // Parse the properties.
+  Properties = 0;
+  std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
+  for (unsigned i = 0, e = PropList.size(); i != e; ++i)
+    if (PropList[i]->getName() == "SDNPHasChain") {
+      Properties |= 1 << SDNPHasChain;
+    } else if (PropList[i]->getName() == "SDNPOptInFlag") {
+      Properties |= 1 << SDNPOptInFlag;
+    } else if (PropList[i]->getName() == "SDNPMayStore") {
+      Properties |= 1 << SDNPMayStore;
+    } else if (PropList[i]->getName() == "SDNPMayLoad") {
+      Properties |= 1 << SDNPMayLoad;
+    } else if (PropList[i]->getName() == "SDNPSideEffect") {
+      Properties |= 1 << SDNPSideEffect;
+    } else if (PropList[i]->getName() == "SDNPMemOperand") {
+      Properties |= 1 << SDNPMemOperand;
+    } else {
+      cerr << "Unsupported SD Node property '" << PropList[i]->getName()
+           << "' on ComplexPattern '" << R->getName() << "'!\n";
+      exit(1);
+    }
+  
+  // Parse the attributes.  
+  Attributes = 0;
+  PropList = R->getValueAsListOfDefs("Attributes");
+  for (unsigned i = 0, e = PropList.size(); i != e; ++i)
+    if (PropList[i]->getName() == "CPAttrParentAsRoot") {
+      Attributes |= 1 << CPAttrParentAsRoot;
+    } else {
+      cerr << "Unsupported pattern attribute '" << PropList[i]->getName()
+           << "' on ComplexPattern '" << R->getName() << "'!\n";
+      exit(1);
+    }
+}
+
+//===----------------------------------------------------------------------===//
+// CodeGenIntrinsic Implementation
+//===----------------------------------------------------------------------===//
+
+std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC,
+                                                   bool TargetOnly) {
+  std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
+  
+  std::vector<CodeGenIntrinsic> Result;
+
+  for (unsigned i = 0, e = I.size(); i != e; ++i) {
+    bool isTarget = I[i]->getValueAsBit("isTarget");
+    if (isTarget == TargetOnly)
+      Result.push_back(CodeGenIntrinsic(I[i]));
+  }
+  return Result;
+}
+
+CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
+  TheDef = R;
+  std::string DefName = R->getName();
+  ModRef = WriteMem;
+  isOverloaded = false;
+  isCommutative = false;
+  
+  if (DefName.size() <= 4 || 
+      std::string(DefName.begin(), DefName.begin() + 4) != "int_")
+    throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
+
+  EnumName = std::string(DefName.begin()+4, DefName.end());
+
+  if (R->getValue("GCCBuiltinName"))  // Ignore a missing GCCBuiltinName field.
+    GCCBuiltinName = R->getValueAsString("GCCBuiltinName");
+
+  TargetPrefix = R->getValueAsString("TargetPrefix");
+  Name = R->getValueAsString("LLVMName");
+
+  if (Name == "") {
+    // If an explicit name isn't specified, derive one from the DefName.
+    Name = "llvm.";
+
+    for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
+      Name += (EnumName[i] == '_') ? '.' : EnumName[i];
+  } else {
+    // Verify it starts with "llvm.".
+    if (Name.size() <= 5 || 
+        std::string(Name.begin(), Name.begin() + 5) != "llvm.")
+      throw "Intrinsic '" + DefName + "'s name does not start with 'llvm.'!";
+  }
+  
+  // If TargetPrefix is specified, make sure that Name starts with
+  // "llvm.<targetprefix>.".
+  if (!TargetPrefix.empty()) {
+    if (Name.size() < 6+TargetPrefix.size() ||
+        std::string(Name.begin() + 5, Name.begin() + 6 + TargetPrefix.size())
+        != (TargetPrefix + "."))
+      throw "Intrinsic '" + DefName + "' does not start with 'llvm." +
+        TargetPrefix + ".'!";
+  }
+  
+  // Parse the list of return types.
+  std::vector<MVT::SimpleValueType> OverloadedVTs;
+  ListInit *TypeList = R->getValueAsListInit("RetTypes");
+  for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
+    Record *TyEl = TypeList->getElementAsRecord(i);
+    assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
+    MVT::SimpleValueType VT;
+    if (TyEl->isSubClassOf("LLVMMatchType")) {
+      unsigned MatchTy = TyEl->getValueAsInt("Number");
+      assert(MatchTy < OverloadedVTs.size() &&
+             "Invalid matching number!");
+      VT = OverloadedVTs[MatchTy];
+      // It only makes sense to use the extended and truncated vector element
+      // variants with iAny types; otherwise, if the intrinsic is not
+      // overloaded, all the types can be specified directly.
+      assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
+               !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
+              VT == MVT::iAny) && "Expected iAny type");
+    } else {
+      VT = getValueType(TyEl->getValueAsDef("VT"));
+    }
+    if (VT == MVT::iAny || VT == MVT::fAny || VT == MVT::iPTRAny) {
+      OverloadedVTs.push_back(VT);
+      isOverloaded |= true;
+    }
+    IS.RetVTs.push_back(VT);
+    IS.RetTypeDefs.push_back(TyEl);
+  }
+
+  if (IS.RetVTs.size() == 0)
+    throw "Intrinsic '"+DefName+"' needs at least a type for the ret value!";
+
+  // Parse the list of parameter types.
+  TypeList = R->getValueAsListInit("ParamTypes");
+  for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
+    Record *TyEl = TypeList->getElementAsRecord(i);
+    assert(TyEl->isSubClassOf("LLVMType") && "Expected a type!");
+    MVT::SimpleValueType VT;
+    if (TyEl->isSubClassOf("LLVMMatchType")) {
+      unsigned MatchTy = TyEl->getValueAsInt("Number");
+      assert(MatchTy < OverloadedVTs.size() &&
+             "Invalid matching number!");
+      VT = OverloadedVTs[MatchTy];
+      // It only makes sense to use the extended and truncated vector element
+      // variants with iAny types; otherwise, if the intrinsic is not
+      // overloaded, all the types can be specified directly.
+      assert(((!TyEl->isSubClassOf("LLVMExtendedElementVectorType") &&
+               !TyEl->isSubClassOf("LLVMTruncatedElementVectorType")) ||
+              VT == MVT::iAny) && "Expected iAny type");
+    } else
+      VT = getValueType(TyEl->getValueAsDef("VT"));
+    if (VT == MVT::iAny || VT == MVT::fAny || VT == MVT::iPTRAny) {
+      OverloadedVTs.push_back(VT);
+      isOverloaded |= true;
+    }
+    IS.ParamVTs.push_back(VT);
+    IS.ParamTypeDefs.push_back(TyEl);
+  }
+
+  // Parse the intrinsic properties.
+  ListInit *PropList = R->getValueAsListInit("Properties");
+  for (unsigned i = 0, e = PropList->getSize(); i != e; ++i) {
+    Record *Property = PropList->getElementAsRecord(i);
+    assert(Property->isSubClassOf("IntrinsicProperty") &&
+           "Expected a property!");
+    
+    if (Property->getName() == "IntrNoMem")
+      ModRef = NoMem;
+    else if (Property->getName() == "IntrReadArgMem")
+      ModRef = ReadArgMem;
+    else if (Property->getName() == "IntrReadMem")
+      ModRef = ReadMem;
+    else if (Property->getName() == "IntrWriteArgMem")
+      ModRef = WriteArgMem;
+    else if (Property->getName() == "IntrWriteMem")
+      ModRef = WriteMem;
+    else if (Property->getName() == "Commutative")
+      isCommutative = true;
+    else if (Property->isSubClassOf("NoCapture")) {
+      unsigned ArgNo = Property->getValueAsInt("ArgNo");
+      ArgumentAttributes.push_back(std::make_pair(ArgNo, NoCapture));
+    } else
+      assert(0 && "Unknown property!");
+  }
+}