Make a new llvm/Target #include directory.

Move files from lib/CodeGen/TargetMachine to lib/Target
Move TargetData.h and TargetMachine.h to Target/{Data.h|Machine.h}
Prepare to split TargetMachine.h into several smaller files


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@566 91177308-0d34-0410-b5e6-96231b3b80d8

8 files changed, 466 insertions, 14 deletions

diff --git a/lib/Target/Makefile b/lib/Target/Makefile
index ebcd23a242..7fd02c6672 100644
--- a/lib/Target/Makefile
+++ b/lib/Target/Makefile
@@ -1,5 +1,5 @@
 LEVEL = ../..
 DIRS = Sparc
+LIBRARYNAME = target
 
 include $(LEVEL)/Makefile.common
-
diff --git a/lib/Target/SparcV9/InstrSched/InstrScheduling.cpp b/lib/Target/SparcV9/InstrSched/InstrScheduling.cpp
index 2358687065..0987572ac3 100644
--- a/lib/Target/SparcV9/InstrSched/InstrScheduling.cpp
+++ b/lib/Target/SparcV9/InstrSched/InstrScheduling.cpp
@@ -12,7 +12,7 @@
 #include "llvm/CodeGen/InstrScheduling.h"
 #include "llvm/CodeGen/SchedPriorities.h"
 #include "llvm/Analysis/LiveVar/BBLiveVar.h"
-#include "llvm/CodeGen/TargetMachine.h"
+#include "llvm/Target/Machine.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Instruction.h"
diff --git a/lib/Target/SparcV9/InstrSched/SchedGraph.cpp b/lib/Target/SparcV9/InstrSched/SchedGraph.cpp
index 05109cb852..3c819f6bc7 100644
--- a/lib/Target/SparcV9/InstrSched/SchedGraph.cpp
+++ b/lib/Target/SparcV9/InstrSched/SchedGraph.cpp
@@ -18,7 +18,7 @@
 #include "llvm/Method.h"
 #include "llvm/CodeGen/SchedGraph.h"
 #include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/TargetMachine.h"
+#include "llvm/Target/Machine.h"
 #include "llvm/Support/StringExtras.h"
 #include <algorithm>
 
diff --git a/lib/Target/SparcV9/RegAlloc/RegClass.h b/lib/Target/SparcV9/RegAlloc/RegClass.h
index 1d08502445..efe174617c 100644
--- a/lib/Target/SparcV9/RegAlloc/RegClass.h
+++ b/lib/Target/SparcV9/RegAlloc/RegClass.h
@@ -16,19 +16,14 @@
 
 */
 
-
-
 #ifndef REG_CLASS_H
 #define REG_CLASS_H
 
 #include "llvm/CodeGen/IGNode.h"
 #include "llvm/CodeGen/InterferenceGraph.h"
-#include "llvm/CodeGen/TargetMachine.h"
-
-
+#include "llvm/Target/Machine.h"
 #include <stack>
 
-
 typedef vector<unsigned int> ReservedColorListType;
 
 
diff --git a/lib/Target/SparcV9/SparcV9Internals.h b/lib/Target/SparcV9/SparcV9Internals.h
index 606966db73..f9a344b37a 100644
--- a/lib/Target/SparcV9/SparcV9Internals.h
+++ b/lib/Target/SparcV9/SparcV9Internals.h
@@ -8,7 +8,7 @@
 #ifndef SPARC_INTERNALS_H
 #define SPARC_INTERNALS_H
 
-#include "llvm/CodeGen/TargetMachine.h"
+#include "llvm/Target/Machine.h"
 #include "SparcRegInfo.h"
 
 #include <sys/types.h>
diff --git a/lib/Target/SparcV9/SparcV9RegInfo.h b/lib/Target/SparcV9/SparcV9RegInfo.h
index 41a6d00a08..3ebef550f0 100644
--- a/lib/Target/SparcV9/SparcV9RegInfo.h
+++ b/lib/Target/SparcV9/SparcV9RegInfo.h
@@ -4,19 +4,17 @@
    Purpose: Contains the description of integer register class of Sparc
 */
 
-
 #ifndef SPARC_INT_REG_CLASS_H
 #define SPARC_INT_REG_CLASS_H
 
-#include "llvm/CodeGen/TargetMachine.h"
+#include "llvm/Target/Machine.h"
 
 //-----------------------------------------------------------------------------
 // Integer Register Class
 //-----------------------------------------------------------------------------
 
-
 // Int register names in same order as enum in class SparcIntRegOrder
-
+//
 static string const IntRegNames[] = 
   {       "g1", "g2", "g3", "g4", "g5", "g6", "g7",
     "o0", "o1", "o2", "o3", "o4", "o5",       "o7",
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
new file mode 100644
index 0000000000..2e2ffd84cd
--- /dev/null
+++ b/lib/Target/TargetData.cpp
@@ -0,0 +1,180 @@
+//===-- TargetData.cpp - Data size & alignment routines --------------------==//
+//
+// This file defines target properties related to datatype size/offset/alignment
+// information.  It uses lazy annotations to cache information about how 
+// structure types are laid out and used.
+//
+// This structure should be created once, filled in if the defaults are not
+// correct and then passed around by const&.  None of the members functions
+// require modification to the object.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Target/Data.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ConstPoolVals.h"
+
+static inline void getTypeInfo(const Type *Ty, const TargetData *TD,
+			       unsigned &Size, unsigned char &Alignment);
+
+//===----------------------------------------------------------------------===//
+// Support for StructLayout Annotation
+//===----------------------------------------------------------------------===//
+
+StructLayout::StructLayout(const StructType *ST, const TargetData &TD) 
+  : Annotation(TD.getStructLayoutAID()) {
+  StructAlignment = 0;
+  StructSize = 0;
+
+  // Loop over each of the elements, placing them in memory...
+  for (StructType::ElementTypes::const_iterator
+	 TI = ST->getElementTypes().begin(), 
+	 TE = ST->getElementTypes().end(); TI != TE; ++TI) {
+    const Type *Ty = *TI;
+    unsigned char A;
+    unsigned TySize, TyAlign;
+    getTypeInfo(Ty, &TD, TySize, A);  TyAlign = A;
+
+    // Add padding if neccesary to make the data element aligned properly...
+    if (StructSize % TyAlign != 0)
+      StructSize = (StructSize/TyAlign + 1) * TyAlign;   // Add padding...
+
+    // Keep track of maximum alignment constraint
+    StructAlignment = max(TyAlign, StructAlignment);
+
+    MemberOffsets.push_back(StructSize);
+    StructSize += TySize;                 // Consume space for this data item...
+  }
+
+  // Add padding to the end of the struct so that it could be put in an array
+  // and all array elements would be aligned correctly.
+  if (StructSize % StructAlignment != 0)
+    StructSize = (StructSize/StructAlignment + 1) * StructAlignment;
+
+  if (StructSize == 0) {
+    StructSize = 1;           // Empty struct is 1 byte
+    StructAlignment = 1;
+  }
+}
+
+Annotation *TargetData::TypeAnFactory(AnnotationID AID, const Annotable *T,
+				      void *D) {
+  const TargetData &TD = *(const TargetData*)D;
+  assert(AID == TD.AID && "Target data annotation ID mismatch!");
+  const Type *Ty = ((const Value *)T)->castTypeAsserting();
+  assert(Ty->isStructType() && 
+	 "Can only create StructLayout annotation on structs!");
+  return new StructLayout((const StructType *)Ty, TD);
+}
+
+//===----------------------------------------------------------------------===//
+//                       TargetData Class Implementation
+//===----------------------------------------------------------------------===//
+
+TargetData::TargetData(const string &TargetName, unsigned char PtrSize = 8,
+	     unsigned char PtrAl = 8, unsigned char DoubleAl = 8,
+	     unsigned char FloatAl = 4, unsigned char LongAl = 8, 
+	     unsigned char IntAl = 4, unsigned char ShortAl = 2,
+	     unsigned char ByteAl = 1)
+  : AID(AnnotationManager::getID("TargetData::" + TargetName)) {
+  AnnotationManager::registerAnnotationFactory(AID, TypeAnFactory, this);
+
+  PointerSize      = PtrSize;
+  PointerAlignment = PtrAl;
+  DoubleAlignment  = DoubleAl;
+  FloatAlignment   = FloatAl;
+  LongAlignment    = LongAl;
+  IntAlignment     = IntAl;
+  ShortAlignment   = ShortAl;
+  ByteAlignment    = ByteAl;
+}
+
+TargetData::~TargetData() {
+  AnnotationManager::registerAnnotationFactory(AID, 0);   // Deregister factory
+}
+
+static inline void getTypeInfo(const Type *Ty, const TargetData *TD,
+			       unsigned &Size, unsigned char &Alignment) {
+  switch (Ty->getPrimitiveID()) {
+  case Type::VoidTyID:
+  case Type::BoolTyID:
+  case Type::UByteTyID:
+  case Type::SByteTyID:  Size = 1; Alignment = TD->getByteAlignment(); return;
+  case Type::UShortTyID:
+  case Type::ShortTyID:  Size = 2; Alignment = TD->getShortAlignment(); return;
+  case Type::UIntTyID:
+  case Type::IntTyID:    Size = 4; Alignment = TD->getIntAlignment(); return;
+  case Type::ULongTyID:
+  case Type::LongTyID:   Size = 8; Alignment = TD->getLongAlignment(); return;
+  case Type::FloatTyID:  Size = 4; Alignment = TD->getFloatAlignment(); return;
+  case Type::DoubleTyID: Size = 8; Alignment = TD->getDoubleAlignment(); return;
+  case Type::LabelTyID:
+  case Type::PointerTyID:
+    Size = TD->getPointerSize(); Alignment = TD->getPointerAlignment();
+    return;
+  case Type::ArrayTyID: {
+    const ArrayType *ATy = (const ArrayType *)Ty;
+    assert(ATy->isSized() && "Can't get TypeInfo of an unsized array!");
+    getTypeInfo(ATy->getElementType(), TD, Size, Alignment);
+    Size *= ATy->getNumElements();
+    return;
+  }
+  case Type::StructTyID: {
+    // Get the layout annotation... which is lazily created on demand.
+    const StructLayout *Layout = TD->getStructLayout((const StructType*)Ty);
+    Size = Layout->StructSize; Alignment = Layout->StructAlignment;
+    return;
+  }
+    
+  case Type::TypeTyID:
+  default:
+    assert(0 && "Bad type for getTypeInfo!!!");
+    return;
+  }
+}
+
+unsigned TargetData::getTypeSize(const Type *Ty) const {
+  unsigned Size; unsigned char Align;
+  getTypeInfo(Ty, this, Size, Align);
+  return Size;
+}
+
+unsigned char TargetData::getTypeAlignment(const Type *Ty) const {
+  unsigned Size; unsigned char Align;
+  getTypeInfo(Ty, this, Size, Align);
+  return Align;
+}
+
+unsigned TargetData::getIndexedOffset(const Type *ptrTy,
+				      const vector<ConstPoolVal*> &Idx) const {
+  const PointerType *PtrTy = ptrTy->castPointerType();
+  unsigned Result = 0;
+
+  // Get the type pointed to...
+  const Type *Ty = PtrTy->getValueType();
+
+  for (unsigned CurIDX = 0; CurIDX < Idx.size(); ++CurIDX) {
+    if (const StructType *STy = Ty->dyncastStructType()) {
+      assert(Idx[CurIDX]->getType() == Type::UByteTy && "Illegal struct idx");
+      unsigned FieldNo = ((ConstPoolUInt*)Idx[CurIDX++])->getValue();
+
+      // Get structure layout information...
+      const StructLayout *Layout = getStructLayout(STy);
+
+      // Add in the offset, as calculated by the structure layout info...
+      assert(FieldNo < Layout->MemberOffsets.size() && "FieldNo out of range!");
+      Result += Layout->MemberOffsets[FieldNo];
+      
+      // Update Ty to refer to current element
+      Ty = STy->getElementTypes()[FieldNo];
+
+    } else if (const ArrayType *ATy = Ty->dyncastArrayType()) {
+      assert(0 && "Loading from arrays not implemented yet!");
+    } else {
+      assert(0 && "Indexing type that is not struct or array?");
+      return 0;                         // Load directly through ptr
+    }
+  }
+
+  return Result;
+}
diff --git a/lib/Target/TargetMachine.cpp b/lib/Target/TargetMachine.cpp
new file mode 100644
index 0000000000..a9e376e10a
--- /dev/null
+++ b/lib/Target/TargetMachine.cpp
@@ -0,0 +1,279 @@
+//===-- TargetMachine.cpp - General Target Information ---------------------==//
+//
+// This file describes the general parts of a Target machine.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Target/Machine.h"
+#include "llvm/DerivedTypes.h"
+
+// External object describing the machine instructions
+// Initialized only when the TargetMachine class is created
+// and reset when that class is destroyed.
+// 
+const MachineInstrDescriptor* TargetInstrDescriptors = NULL;
+
+resourceId_t MachineResource::nextId = 0;
+
+static cycles_t	ComputeMinGap		(const InstrRUsage& fromRU,
+					 const InstrRUsage& toRU);
+
+static bool	RUConflict		(const vector<resourceId_t>& fromRVec,
+					 const vector<resourceId_t>& fromRVec);
+
+//---------------------------------------------------------------------------
+// class TargetMachine
+// 
+// Purpose:
+//   Machine description.
+// 
+//---------------------------------------------------------------------------
+
+
+// function TargetMachine::findOptimalStorageSize 
+// 
+// Purpose:
+//   This default implementation assumes that all sub-word data items use
+//   space equal to optSizeForSubWordData, and all other primitive data
+//   items use space according to the type.
+//   
+unsigned int TargetMachine::findOptimalStorageSize(const Type* ty) const {
+  switch(ty->getPrimitiveID()) {
+  case Type::BoolTyID:
+  case Type::UByteTyID:
+  case Type::SByteTyID:     
+  case Type::UShortTyID:
+  case Type::ShortTyID:     
+    return optSizeForSubWordData;
+    
+  default:
+    return DataLayout.getTypeSize(ty);
+  }
+}
+
+
+//---------------------------------------------------------------------------
+// class MachineInstructionInfo
+//	Interface to description of machine instructions
+//---------------------------------------------------------------------------
+
+
+/*ctor*/
+MachineInstrInfo::MachineInstrInfo(const MachineInstrDescriptor* _desc,
+				   unsigned int _descSize,
+				   unsigned int _numRealOpCodes)
+  : desc(_desc), descSize(_descSize), numRealOpCodes(_numRealOpCodes)
+{
+  assert(TargetInstrDescriptors == NULL && desc != NULL);
+  TargetInstrDescriptors = desc;	// initialize global variable
+}  
+
+
+/*dtor*/
+MachineInstrInfo::~MachineInstrInfo()
+{
+  TargetInstrDescriptors = NULL;	// reset global variable
+}
+
+
+bool
+MachineInstrInfo::constantFitsInImmedField(MachineOpCode opCode,
+					   int64_t intValue) const
+{
+  // First, check if opCode has an immed field.
+  bool isSignExtended;
+  uint64_t maxImmedValue = this->maxImmedConstant(opCode, isSignExtended);
+  if (maxImmedValue != 0)
+    {
+      // Now check if the constant fits
+      if (intValue <= (int64_t) maxImmedValue &&
+	  intValue >= -((int64_t) maxImmedValue+1))
+	return true;
+    }
+  
+  return false;
+}
+
+
+//---------------------------------------------------------------------------
+// class MachineSchedInfo
+//	Interface to machine description for instruction scheduling
+//---------------------------------------------------------------------------
+
+/*ctor*/
+MachineSchedInfo::MachineSchedInfo(int                     _numSchedClasses,
+				   const MachineInstrInfo* _mii,
+				   const InstrClassRUsage* _classRUsages,
+				   const InstrRUsageDelta* _usageDeltas,
+				   const InstrIssueDelta*  _issueDeltas,
+				   unsigned int		   _numUsageDeltas,
+				   unsigned int		   _numIssueDeltas)
+  : numSchedClasses(_numSchedClasses),
+    mii(_mii),
+    classRUsages(_classRUsages),
+    usageDeltas(_usageDeltas),
+    issueDeltas(_issueDeltas),
+    numUsageDeltas(_numUsageDeltas),
+    numIssueDeltas(_numIssueDeltas)
+{
+}
+
+void
+MachineSchedInfo::initializeResources()
+{
+  assert(MAX_NUM_SLOTS >= (int) getMaxNumIssueTotal()
+	 && "Insufficient slots for static data! Increase MAX_NUM_SLOTS");
+  
+  // First, compute common resource usage info for each class because
+  // most instructions will probably behave the same as their class.
+  // Cannot allocate a vector of InstrRUsage so new each one.
+  // 
+  vector<InstrRUsage> instrRUForClasses;
+  instrRUForClasses.resize(numSchedClasses);
+  for (InstrSchedClass sc=0; sc < numSchedClasses; sc++)
+    {
+      // instrRUForClasses.push_back(new InstrRUsage);
+      instrRUForClasses[sc].setMaxSlots(getMaxNumIssueTotal());
+      instrRUForClasses[sc] = classRUsages[sc];
+    }
+  
+  computeInstrResources(instrRUForClasses);
+  
+  computeIssueGaps(instrRUForClasses);
+}
+
+
+void
+MachineSchedInfo::computeInstrResources(const vector<InstrRUsage>& instrRUForClasses)
+{
+  int numOpCodes =  mii->getNumRealOpCodes();
+  instrRUsages.resize(numOpCodes);
+  
+  // First get the resource usage information from the class resource usages.
+  for (MachineOpCode op=0; op < numOpCodes; op++)
+    {
+      InstrSchedClass sc = getSchedClass(op);
+      assert(sc >= 0 && sc < numSchedClasses);
+      instrRUsages[op] = instrRUForClasses[sc];
+    }
+  
+  // Now, modify the resource usages as specified in the deltas.
+  for (unsigned i=0; i < numUsageDeltas; i++)
+    {
+      MachineOpCode op = usageDeltas[i].opCode;
+      assert(op < numOpCodes);
+      instrRUsages[op].addUsageDelta(usageDeltas[i]);
+    }
+  
+  // Then modify the issue restrictions as specified in the deltas.
+  for (unsigned i=0; i < numIssueDeltas; i++)
+    {
+      MachineOpCode op = issueDeltas[i].opCode;
+      assert(op < numOpCodes);
+      instrRUsages[issueDeltas[i].opCode].addIssueDelta(issueDeltas[i]);
+    }
+}
+
+
+void
+MachineSchedInfo::computeIssueGaps(const vector<InstrRUsage>& instrRUForClasses)
+{
+  int numOpCodes =  mii->getNumRealOpCodes();
+  instrRUsages.resize(numOpCodes);
+  
+  assert(numOpCodes < (1 << MAX_OPCODE_SIZE) - 1
+	 && "numOpCodes invalid for implementation of class OpCodePair!");
+  
+  // First, compute issue gaps between pairs of classes based on common
+  // resources usages for each class, because most instruction pairs will
+  // usually behave the same as their class.
+  // 
+  int classPairGaps[numSchedClasses][numSchedClasses];
+  for (InstrSchedClass fromSC=0; fromSC < numSchedClasses; fromSC++)
+    for (InstrSchedClass toSC=0; toSC < numSchedClasses; toSC++)
+      {
+	int classPairGap = ComputeMinGap(instrRUForClasses[fromSC],
+				      instrRUForClasses[toSC]);
+	classPairGaps[fromSC][toSC] = classPairGap; 
+      }
+  
+  // Now, for each pair of instructions, use the class pair gap if both
+  // instructions have identical resource usage as their respective classes.
+  // If not, recompute the gap for the pair from scratch.
+
+  longestIssueConflict = 0;
+  
+  for (MachineOpCode fromOp=0; fromOp < numOpCodes; fromOp++)
+    for (MachineOpCode toOp=0; toOp < numOpCodes; toOp++)
+    {
+      int instrPairGap = 
+	(instrRUsages[fromOp].sameAsClass && instrRUsages[toOp].sameAsClass)
+	? classPairGaps[getSchedClass(fromOp)][getSchedClass(toOp)]
+	: ComputeMinGap(instrRUsages[fromOp], instrRUsages[toOp]);
+      
+      if (instrPairGap > 0)
+	{
+	  issueGaps[OpCodePair(fromOp,toOp)] = instrPairGap;
+	  conflictLists[fromOp].push_back(toOp);
+	  longestIssueConflict = max(longestIssueConflict, instrPairGap);
+	}
+    }
+}
+
+
+// Check if fromRVec and toRVec have *any* common entries.
+// Assume the vectors are sorted in increasing order.
+// Algorithm copied from function set_intersection() for sorted ranges (stl_algo.h).
+inline static bool 
+RUConflict(const vector<resourceId_t>& fromRVec,
+	   const vector<resourceId_t>& toRVec)
+{
+  bool commonElementFound = false;
+  
+  unsigned fN = fromRVec.size(), tN = toRVec.size(); 
+  unsigned fi = 0, ti = 0;
+  while (fi < fN && ti < tN)
+    if (fromRVec[fi] < toRVec[ti])
+      ++fi;
+    else if (toRVec[ti] < fromRVec[fi])
+      ++ti;
+    else
+      {
+	commonElementFound = true;
+	break;
+      }
+  
+  return commonElementFound; 
+}
+
+
+static cycles_t
+ComputeMinGap(const InstrRUsage& fromRU, const InstrRUsage& toRU)
+{
+  cycles_t minGap = 0;
+  
+  if (fromRU.numBubbles > 0)
+    minGap = fromRU.numBubbles;
+  
+  if (minGap < fromRU.numCycles)
+    {
+      // only need to check from cycle `minGap' onwards
+      for (cycles_t gap=minGap; gap <= fromRU.numCycles-1; gap++)
+	{
+	  // check if instr. #2 can start executing `gap' cycles after #1
+	  // by checking for resource conflicts in each overlapping cycle
+	  cycles_t numOverlap = min(fromRU.numCycles - gap, toRU.numCycles);
+	  for (cycles_t c = 0; c <= numOverlap-1; c++)
+	    if (RUConflict(fromRU.resourcesByCycle[gap + c],
+			   toRU.resourcesByCycle[c]))
+	      {// conflict found so minGap must be more than `gap'
+		minGap = gap+1;
+		break;
+	      }
+	}
+    }
+  
+  return minGap;
+}
+
+//---------------------------------------------------------------------------