X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FInstrInfoEmitter.cpp;h=adb98fb9589f15c6dc4f9f25695cf46ccab59baf;hb=9e6d1d1f5034347d237941f1bf08fba5c1583cd3;hp=ed040b15d9036f046081717e36d568fc8a47692b;hpb=d0fde30ce850b78371fd1386338350591f9ff494;p=oota-llvm.git

diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp
index ed040b15d90..adb98fb9589 100644
--- a/utils/TableGen/InstrInfoEmitter.cpp
+++ b/utils/TableGen/InstrInfoEmitter.cpp
@@ -1,10 +1,10 @@
 //===- InstrInfoEmitter.cpp - Generate a Instruction Set Desc. ------------===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
 //===----------------------------------------------------------------------===//
 //
 // This tablegen backend is responsible for emitting a description of the target
@@ -13,103 +13,274 @@
 //===----------------------------------------------------------------------===//
 
 #include "InstrInfoEmitter.h"
-#include "CodeGenWrappers.h"
+#include "CodeGenTarget.h"
 #include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include <algorithm>
+using namespace llvm;
 
-namespace llvm {
-
-// runEnums - Print out enum values for all of the instructions.
-void InstrInfoEmitter::runEnums(std::ostream &OS) {
-  std::vector<Record*> Insts = Records.getAllDerivedDefinitions("Instruction");
+static void PrintDefList(const std::vector<Record*> &Uses,
+                         unsigned Num, raw_ostream &OS) {
+  OS << "static const unsigned ImplicitList" << Num << "[] = { ";
+  for (unsigned i = 0, e = Uses.size(); i != e; ++i)
+    OS << getQualifiedName(Uses[i]) << ", ";
+  OS << "0 };\n";
+}
 
-  if (Insts.size() == 0)
-    throw std::string("No 'Instruction' subclasses defined!");
+static void PrintBarriers(std::vector<Record*> &Barriers,
+                          unsigned Num, raw_ostream &OS) {
+  OS << "static const TargetRegisterClass* Barriers" << Num << "[] = { ";
+  for (unsigned i = 0, e = Barriers.size(); i != e; ++i)
+    OS << "&" << getQualifiedName(Barriers[i]) << "RegClass, ";
+  OS << "NULL };\n";
+}
 
-  std::string Namespace = Insts[0]->getValueAsString("Namespace");
+//===----------------------------------------------------------------------===//
+// Instruction Itinerary Information.
+//===----------------------------------------------------------------------===//
 
-  EmitSourceFileHeader("Target Instruction Enum Values", OS);
+struct RecordNameComparator {
+  bool operator()(const Record *Rec1, const Record *Rec2) const {
+    return Rec1->getName() < Rec2->getName();
+  }
+};
 
-  if (!Namespace.empty())
-    OS << "namespace " << Namespace << " {\n";
-  OS << "  enum {\n";
+void InstrInfoEmitter::GatherItinClasses() {
+  std::vector<Record*> DefList =
+  Records.getAllDerivedDefinitions("InstrItinClass");
+  std::sort(DefList.begin(), DefList.end(), RecordNameComparator());
+  
+  for (unsigned i = 0, N = DefList.size(); i < N; i++)
+    ItinClassMap[DefList[i]->getName()] = i;
+}  
 
-  CodeGenTarget Target;
+unsigned InstrInfoEmitter::getItinClassNumber(const Record *InstRec) {
+  return ItinClassMap[InstRec->getValueAsDef("Itinerary")->getName()];
+}
 
-  // We must emit the PHI opcode first...
-  Record *InstrInfo = Target.getInstructionSet();
-  Record *PHI = InstrInfo->getValueAsDef("PHIInst");
+//===----------------------------------------------------------------------===//
+// Operand Info Emission.
+//===----------------------------------------------------------------------===//
 
-  OS << "    " << PHI->getName() << ", \t// 0 (fixed for all targets)\n";
+std::vector<std::string>
+InstrInfoEmitter::GetOperandInfo(const CodeGenInstruction &Inst) {
+  std::vector<std::string> Result;
   
-  // Print out the rest of the instructions now...
-  for (unsigned i = 0, e = Insts.size(); i != e; ++i)
-    if (Insts[i] != PHI)
-      OS << "    " << Insts[i]->getName() << ", \t// " << i+1 << "\n";
+  for (unsigned i = 0, e = Inst.OperandList.size(); i != e; ++i) {
+    // Handle aggregate operands and normal operands the same way by expanding
+    // either case into a list of operands for this op.
+    std::vector<CodeGenInstruction::OperandInfo> OperandList;
+
+    // This might be a multiple operand thing.  Targets like X86 have
+    // registers in their multi-operand operands.  It may also be an anonymous
+    // operand, which has a single operand, but no declared class for the
+    // operand.
+    DagInit *MIOI = Inst.OperandList[i].MIOperandInfo;
+    
+    if (!MIOI || MIOI->getNumArgs() == 0) {
+      // Single, anonymous, operand.
+      OperandList.push_back(Inst.OperandList[i]);
+    } else {
+      for (unsigned j = 0, e = Inst.OperandList[i].MINumOperands; j != e; ++j) {
+        OperandList.push_back(Inst.OperandList[i]);
+
+        Record *OpR = dynamic_cast<DefInit*>(MIOI->getArg(j))->getDef();
+        OperandList.back().Rec = OpR;
+      }
+    }
+
+    for (unsigned j = 0, e = OperandList.size(); j != e; ++j) {
+      Record *OpR = OperandList[j].Rec;
+      std::string Res;
+      
+      if (OpR->isSubClassOf("RegisterClass"))
+        Res += getQualifiedName(OpR) + "RegClassID, ";
+      else if (OpR->isSubClassOf("PointerLikeRegClass"))
+        Res += utostr(OpR->getValueAsInt("RegClassKind")) + ", ";
+      else
+        Res += "0, ";
+      
+      // Fill in applicable flags.
+      Res += "0";
+        
+      // Ptr value whose register class is resolved via callback.
+      if (OpR->isSubClassOf("PointerLikeRegClass"))
+        Res += "|(1<<TOI::LookupPtrRegClass)";
+
+      // Predicate operands.  Check to see if the original unexpanded operand
+      // was of type PredicateOperand.
+      if (Inst.OperandList[i].Rec->isSubClassOf("PredicateOperand"))
+        Res += "|(1<<TOI::Predicate)";
+        
+      // Optional def operands.  Check to see if the original unexpanded operand
+      // was of type OptionalDefOperand.
+      if (Inst.OperandList[i].Rec->isSubClassOf("OptionalDefOperand"))
+        Res += "|(1<<TOI::OptionalDef)";
+
+      // Fill in constraint info.
+      Res += ", " + Inst.OperandList[i].Constraints[j];
+      Result.push_back(Res);
+    }
+  }
+
+  return Result;
+}
+
+void InstrInfoEmitter::EmitOperandInfo(raw_ostream &OS, 
+                                       OperandInfoMapTy &OperandInfoIDs) {
+  // ID #0 is for no operand info.
+  unsigned OperandListNum = 0;
+  OperandInfoIDs[std::vector<std::string>()] = ++OperandListNum;
   
-  OS << "  };\n";
-  if (!Namespace.empty())
-    OS << "}\n";
-  EmitSourceFileTail(OS);
+  OS << "\n";
+  const CodeGenTarget &Target = CDP.getTargetInfo();
+  for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
+       E = Target.inst_end(); II != E; ++II) {
+    std::vector<std::string> OperandInfo = GetOperandInfo(II->second);
+    unsigned &N = OperandInfoIDs[OperandInfo];
+    if (N != 0) continue;
+    
+    N = ++OperandListNum;
+    OS << "static const TargetOperandInfo OperandInfo" << N << "[] = { ";
+    for (unsigned i = 0, e = OperandInfo.size(); i != e; ++i)
+      OS << "{ " << OperandInfo[i] << " }, ";
+    OS << "};\n";
+  }
 }
 
-void InstrInfoEmitter::printDefList(ListInit *LI, const std::string &Name,
-                                    std::ostream &OS) const {
-  OS << "static const unsigned " << Name << "[] = { ";
-  for (unsigned j = 0, e = LI->getSize(); j != e; ++j)
-    if (DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(j)))
-      OS << getQualifiedName(DI->getDef()) << ", ";
-    else
-      throw "Illegal value in '" + Name + "' list!";
-  OS << "0 };\n";
+void InstrInfoEmitter::DetectRegisterClassBarriers(std::vector<Record*> &Defs,
+                                  const std::vector<CodeGenRegisterClass> &RCs,
+                                  std::vector<Record*> &Barriers) {
+  std::set<Record*> DefSet;
+  unsigned NumDefs = Defs.size();
+  for (unsigned i = 0; i < NumDefs; ++i)
+    DefSet.insert(Defs[i]);
+
+  for (unsigned i = 0, e = RCs.size(); i != e; ++i) {
+    const CodeGenRegisterClass &RC = RCs[i];
+    unsigned NumRegs = RC.Elements.size();
+    if (NumRegs > NumDefs)
+      continue; // Can't possibly clobber this RC.
+
+    bool Clobber = true;
+    for (unsigned j = 0; j < NumRegs; ++j) {
+      Record *Reg = RC.Elements[j];
+      if (!DefSet.count(Reg)) {
+        Clobber = false;
+        break;
+      }
+    }
+    if (Clobber)
+      Barriers.push_back(RC.TheDef);
+  }
 }
 
+//===----------------------------------------------------------------------===//
+// Main Output.
+//===----------------------------------------------------------------------===//
 
 // run - Emit the main instruction description records for the target...
-void InstrInfoEmitter::run(std::ostream &OS) {
+void InstrInfoEmitter::run(raw_ostream &OS) {
+  GatherItinClasses();
+
   EmitSourceFileHeader("Target Instruction Descriptors", OS);
-  CodeGenTarget Target;
+  OS << "namespace llvm {\n\n";
+
+  CodeGenTarget &Target = CDP.getTargetInfo();
   const std::string &TargetName = Target.getName();
   Record *InstrInfo = Target.getInstructionSet();
-  Record *PHI = InstrInfo->getValueAsDef("PHIInst");
+  const std::vector<CodeGenRegisterClass> &RCs = Target.getRegisterClasses();
 
-  std::vector<Record*> Instructions =
-    Records.getAllDerivedDefinitions("Instruction");
-  
-  // Emit empty implicit uses and defs lists
-  OS << "static const unsigned EmptyImpUses[] = { 0 };\n"
-     << "static const unsigned EmptyImpDefs[] = { 0 };\n";
-
-  // Emit all of the instruction's implicit uses and defs...
-  for (unsigned i = 0, e = Instructions.size(); i != e; ++i) {
-    Record *Inst = Instructions[i];
-    ListInit *LI = Inst->getValueAsListInit("Uses");
-    if (LI->getSize()) printDefList(LI, Inst->getName()+"ImpUses", OS);
-    LI = Inst->getValueAsListInit("Defs");
-    if (LI->getSize()) printDefList(LI, Inst->getName()+"ImpDefs", OS);
+  // Keep track of all of the def lists we have emitted already.
+  std::map<std::vector<Record*>, unsigned> EmittedLists;
+  unsigned ListNumber = 0;
+  std::map<std::vector<Record*>, unsigned> EmittedBarriers;
+  unsigned BarrierNumber = 0;
+  std::map<Record*, unsigned> BarriersMap;
+ 
+  // Emit all of the instruction's implicit uses and defs.
+  for (CodeGenTarget::inst_iterator II = Target.inst_begin(),
+         E = Target.inst_end(); II != E; ++II) {
+    Record *Inst = II->second.TheDef;
+    std::vector<Record*> Uses = Inst->getValueAsListOfDefs("Uses");
+    if (!Uses.empty()) {
+      unsigned &IL = EmittedLists[Uses];
+      if (!IL) PrintDefList(Uses, IL = ++ListNumber, OS);
+    }
+    std::vector<Record*> Defs = Inst->getValueAsListOfDefs("Defs");
+    if (!Defs.empty()) {
+      std::vector<Record*> RCBarriers;
+      DetectRegisterClassBarriers(Defs, RCs, RCBarriers);
+      if (!RCBarriers.empty()) {
+        unsigned &IB = EmittedBarriers[RCBarriers];
+        if (!IB) PrintBarriers(RCBarriers, IB = ++BarrierNumber, OS);
+        BarriersMap.insert(std::make_pair(Inst, IB));
+      }
+
+      unsigned &IL = EmittedLists[Defs];
+      if (!IL) PrintDefList(Defs, IL = ++ListNumber, OS);
+    }
   }
 
-  OS << "\nstatic const TargetInstrDescriptor " << TargetName
+  OperandInfoMapTy OperandInfoIDs;
+  
+  // Emit all of the operand info records.
+  EmitOperandInfo(OS, OperandInfoIDs);
+  
+  // Emit all of the TargetInstrDesc records in their ENUM ordering.
+  //
+  OS << "\nstatic const TargetInstrDesc " << TargetName
      << "Insts[] = {\n";
-  emitRecord(PHI, 0, InstrInfo, OS);
+  std::vector<const CodeGenInstruction*> NumberedInstructions;
+  Target.getInstructionsByEnumValue(NumberedInstructions);
 
-  for (unsigned i = 0, e = Instructions.size(); i != e; ++i)
-    if (Instructions[i] != PHI)
-      emitRecord(Instructions[i], i+1, InstrInfo, OS);
+  for (unsigned i = 0, e = NumberedInstructions.size(); i != e; ++i)
+    emitRecord(*NumberedInstructions[i], i, InstrInfo, EmittedLists,
+               BarriersMap, OperandInfoIDs, OS);
   OS << "};\n";
-  EmitSourceFileTail(OS);
+  OS << "} // End llvm namespace \n";
 }
 
-void InstrInfoEmitter::emitRecord(Record *R, unsigned Num, Record *InstrInfo,
-                                  std::ostream &OS) {
-  OS << "  { \"" << R->getValueAsString("Name")
-     << "\",\t-1, -1, 0, false, 0, 0, 0, 0";
+void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
+                                  Record *InstrInfo,
+                         std::map<std::vector<Record*>, unsigned> &EmittedLists,
+                                  std::map<Record*, unsigned> &BarriersMap,
+                                  const OperandInfoMapTy &OpInfo,
+                                  raw_ostream &OS) {
+  int MinOperands = 0;
+  if (!Inst.OperandList.empty())
+    // Each logical operand can be multiple MI operands.
+    MinOperands = Inst.OperandList.back().MIOperandNo +
+                  Inst.OperandList.back().MINumOperands;
+
+  OS << "  { ";
+  OS << Num << ",\t" << MinOperands << ",\t"
+     << Inst.NumDefs << ",\t" << getItinClassNumber(Inst.TheDef)
+     << ",\t\"" << Inst.TheDef->getName() << "\", 0";
 
   // Emit all of the target indepedent flags...
-  if (R->getValueAsBit("isReturn"))     OS << "|M_RET_FLAG";
-  if (R->getValueAsBit("isBranch"))     OS << "|M_BRANCH_FLAG";
-  if (R->getValueAsBit("isCall"  ))     OS << "|M_CALL_FLAG";
-  if (R->getValueAsBit("isTwoAddress")) OS << "|M_2_ADDR_FLAG";
-  if (R->getValueAsBit("isTerminator")) OS << "|M_TERMINATOR_FLAG";
+  if (Inst.isReturn)           OS << "|(1<<TID::Return)";
+  if (Inst.isBranch)           OS << "|(1<<TID::Branch)";
+  if (Inst.isIndirectBranch)   OS << "|(1<<TID::IndirectBranch)";
+  if (Inst.isBarrier)          OS << "|(1<<TID::Barrier)";
+  if (Inst.hasDelaySlot)       OS << "|(1<<TID::DelaySlot)";
+  if (Inst.isCall)             OS << "|(1<<TID::Call)";
+  if (Inst.canFoldAsLoad)      OS << "|(1<<TID::FoldableAsLoad)";
+  if (Inst.mayLoad)            OS << "|(1<<TID::MayLoad)";
+  if (Inst.mayStore)           OS << "|(1<<TID::MayStore)";
+  if (Inst.isPredicable)       OS << "|(1<<TID::Predicable)";
+  if (Inst.isConvertibleToThreeAddress) OS << "|(1<<TID::ConvertibleTo3Addr)";
+  if (Inst.isCommutable)       OS << "|(1<<TID::Commutable)";
+  if (Inst.isTerminator)       OS << "|(1<<TID::Terminator)";
+  if (Inst.isReMaterializable) OS << "|(1<<TID::Rematerializable)";
+  if (Inst.isNotDuplicable)    OS << "|(1<<TID::NotDuplicable)";
+  if (Inst.hasOptionalDef)     OS << "|(1<<TID::HasOptionalDef)";
+  if (Inst.usesCustomInserter) OS << "|(1<<TID::UsesCustomInserter)";
+  if (Inst.isVariadic)         OS << "|(1<<TID::Variadic)";
+  if (Inst.hasSideEffects)     OS << "|(1<<TID::UnmodeledSideEffects)";
+  if (Inst.isAsCheapAsAMove)   OS << "|(1<<TID::CheapAsAMove)";
+  if (Inst.hasExtraSrcRegAllocReq) OS << "|(1<<TID::ExtraSrcRegAllocReq)";
+  if (Inst.hasExtraDefRegAllocReq) OS << "|(1<<TID::ExtraDefRegAllocReq)";
   OS << ", 0";
 
   // Emit all of the target-specific flags...
@@ -120,36 +291,65 @@ void InstrInfoEmitter::emitRecord(Record *R, unsigned Num, Record *InstrInfo,
           ":(TargetInfoFields, TargetInfoPositions) must be equal!";
 
   for (unsigned i = 0, e = LI->getSize(); i != e; ++i)
-    emitShiftedValue(R, dynamic_cast<StringInit*>(LI->getElement(i)),
+    emitShiftedValue(Inst.TheDef, dynamic_cast<StringInit*>(LI->getElement(i)),
                      dynamic_cast<IntInit*>(Shift->getElement(i)), OS);
 
   OS << ", ";
 
   // Emit the implicit uses and defs lists...
-  LI = R->getValueAsListInit("Uses");
-  if (!LI->getSize())
-    OS << "EmptyImpUses, ";
-  else 
-    OS << R->getName() << "ImpUses, ";
-
-  LI = R->getValueAsListInit("Defs");
-  if (!LI->getSize())
-    OS << "EmptyImpDefs ";
-  else 
-    OS << R->getName() << "ImpDefs ";
-
-  OS << " },  // Inst #" << Num << " = " << R->getName() << "\n";
+  std::vector<Record*> UseList = Inst.TheDef->getValueAsListOfDefs("Uses");
+  if (UseList.empty())
+    OS << "NULL, ";
+  else
+    OS << "ImplicitList" << EmittedLists[UseList] << ", ";
+
+  std::vector<Record*> DefList = Inst.TheDef->getValueAsListOfDefs("Defs");
+  if (DefList.empty())
+    OS << "NULL, ";
+  else
+    OS << "ImplicitList" << EmittedLists[DefList] << ", ";
+
+  std::map<Record*, unsigned>::iterator BI = BarriersMap.find(Inst.TheDef);
+  if (BI == BarriersMap.end())
+    OS << "NULL, ";
+  else
+    OS << "Barriers" << BI->second << ", ";
+
+  // Emit the operand info.
+  std::vector<std::string> OperandInfo = GetOperandInfo(Inst);
+  if (OperandInfo.empty())
+    OS << "0";
+  else
+    OS << "OperandInfo" << OpInfo.find(OperandInfo)->second;
+  
+  OS << " },  // Inst #" << Num << " = " << Inst.TheDef->getName() << "\n";
 }
 
+
 void InstrInfoEmitter::emitShiftedValue(Record *R, StringInit *Val,
-                                        IntInit *ShiftInt, std::ostream &OS) {
+                                        IntInit *ShiftInt, raw_ostream &OS) {
   if (Val == 0 || ShiftInt == 0)
     throw std::string("Illegal value or shift amount in TargetInfo*!");
   RecordVal *RV = R->getValue(Val->getValue());
   int Shift = ShiftInt->getValue();
 
-  if (RV == 0 || RV->getValue() == 0)
-    throw R->getName() + " doesn't have a field named '" + Val->getValue()+"'!";
+  if (RV == 0 || RV->getValue() == 0) {
+    // This isn't an error if this is a builtin instruction.
+    if (R->getName() != "PHI" &&
+        R->getName() != "INLINEASM" &&
+        R->getName() != "DBG_LABEL" &&
+        R->getName() != "EH_LABEL" &&
+        R->getName() != "GC_LABEL" &&
+        R->getName() != "KILL" &&
+        R->getName() != "EXTRACT_SUBREG" &&
+        R->getName() != "INSERT_SUBREG" &&
+        R->getName() != "IMPLICIT_DEF" &&
+        R->getName() != "SUBREG_TO_REG" &&
+        R->getName() != "COPY_TO_REGCLASS")
+      throw R->getName() + " doesn't have a field named '" + 
+            Val->getValue() + "'!";
+    return;
+  }
 
   Init *Value = RV->getValue();
   if (BitInit *BI = dynamic_cast<BitInit*>(Value)) {
@@ -160,18 +360,26 @@ void InstrInfoEmitter::emitShiftedValue(Record *R, StringInit *Val,
     Init *I = BI->convertInitializerTo(new IntRecTy());
     if (I)
       if (IntInit *II = dynamic_cast<IntInit*>(I)) {
-        if (II->getValue())
-          OS << "|(" << II->getValue() << "<<" << Shift << ")";
+        if (II->getValue()) {
+          if (Shift)
+            OS << "|(" << II->getValue() << "<<" << Shift << ")";
+          else
+            OS << "|" << II->getValue();
+        }
         return;
       }
 
   } else if (IntInit *II = dynamic_cast<IntInit*>(Value)) {
-    if (II->getValue()) OS << "|(" << II->getValue() << "<<" << Shift << ")";
+    if (II->getValue()) {
+      if (Shift)
+        OS << "|(" << II->getValue() << "<<" << Shift << ")";
+      else
+        OS << II->getValue();
+    }
     return;
   }
 
-  std::cerr << "Unhandled initializer: " << *Val << "\n";
+  errs() << "Unhandled initializer: " << *Val << "\n";
   throw "In record '" + R->getName() + "' for TSFlag emission.";
 }
 
-} // End llvm namespace