1 files changed, 320 insertions, 0 deletions
diff --git a/lib/VMCore/Function.cpp b/lib/VMCore/Function.cpp
new file mode 100644
index 0000000..ab12ae8
--- /dev/null
+++ b/lib/VMCore/Function.cpp
@@ -0,0 +1,320 @@
+//===-- Function.cpp - Implement the Global object classes ----------------===//
+//
+//                     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 implements the Function class for the VMCore library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Module.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/ParameterAttributes.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/Support/LeakDetector.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "SymbolTableListTraitsImpl.h"
+#include "llvm/ADT/StringExtras.h"
+using namespace llvm;
+
+BasicBlock *ilist_traits<BasicBlock>::createSentinel() {
+  BasicBlock *Ret = new BasicBlock();
+  // This should not be garbage monitored.
+  LeakDetector::removeGarbageObject(Ret);
+  return Ret;
+}
+
+iplist<BasicBlock> &ilist_traits<BasicBlock>::getList(Function *F) {
+  return F->getBasicBlockList();
+}
+
+Argument *ilist_traits<Argument>::createSentinel() {
+  Argument *Ret = new Argument(Type::Int32Ty);
+  // This should not be garbage monitored.
+  LeakDetector::removeGarbageObject(Ret);
+  return Ret;
+}
+
+iplist<Argument> &ilist_traits<Argument>::getList(Function *F) {
+  return F->getArgumentList();
+}
+
+// Explicit instantiations of SymbolTableListTraits since some of the methods
+// are not in the public header file...
+template class SymbolTableListTraits<Argument, Function>;
+template class SymbolTableListTraits<BasicBlock, Function>;
+
+//===----------------------------------------------------------------------===//
+// Argument Implementation
+//===----------------------------------------------------------------------===//
+
+Argument::Argument(const Type *Ty, const std::string &Name, Function *Par)
+  : Value(Ty, Value::ArgumentVal) {
+  Parent = 0;
+
+  // Make sure that we get added to a function
+  LeakDetector::addGarbageObject(this);
+
+  if (Par)
+    Par->getArgumentList().push_back(this);
+  setName(Name);
+}
+
+void Argument::setParent(Function *parent) {
+  if (getParent())
+    LeakDetector::addGarbageObject(this);
+  Parent = parent;
+  if (getParent())
+    LeakDetector::removeGarbageObject(this);
+}
+
+//===----------------------------------------------------------------------===//
+// ParamAttrsList Implementation
+//===----------------------------------------------------------------------===//
+
+uint16_t
+ParamAttrsList::getParamAttrs(uint16_t Index) const {
+  unsigned limit = attrs.size();
+  for (unsigned i = 0; i < limit; ++i)
+    if (attrs[i].index == Index)
+      return attrs[i].attrs;
+  return ParamAttr::None;
+}
+
+
+std::string 
+ParamAttrsList::getParamAttrsText(uint16_t Attrs) {
+  std::string Result;
+  if (Attrs & ParamAttr::ZExt)
+    Result += "zext ";
+  if (Attrs & ParamAttr::SExt)
+    Result += "sext ";
+  if (Attrs & ParamAttr::NoReturn)
+    Result += "noreturn ";
+  if (Attrs & ParamAttr::NoUnwind)
+    Result += "nounwind ";
+  if (Attrs & ParamAttr::InReg)
+    Result += "inreg ";
+  if (Attrs & ParamAttr::NoAlias)
+    Result += "noalias ";
+  if (Attrs & ParamAttr::StructRet)
+    Result += "sret ";  
+  if (Attrs & ParamAttr::ByVal)
+    Result += "byval ";
+  return Result;
+}
+
+void 
+ParamAttrsList::Profile(FoldingSetNodeID &ID) const {
+  for (unsigned i = 0; i < attrs.size(); ++i) {
+    unsigned val = attrs[i].attrs << 16 | attrs[i].index;
+    ID.AddInteger(val);
+  }
+}
+
+static ManagedStatic<FoldingSet<ParamAttrsList> > ParamAttrsLists;
+
+ParamAttrsList *
+ParamAttrsList::get(const ParamAttrsVector &attrVec) {
+  assert(!attrVec.empty() && "Illegal to create empty ParamAttrsList");
+  ParamAttrsList key(attrVec);
+  FoldingSetNodeID ID;
+  key.Profile(ID);
+  void *InsertPos;
+  ParamAttrsList* PAL = ParamAttrsLists->FindNodeOrInsertPos(ID, InsertPos);
+  if (!PAL) {
+    PAL = new ParamAttrsList(attrVec);
+    ParamAttrsLists->InsertNode(PAL, InsertPos);
+  }
+  return PAL;
+}
+
+ParamAttrsList::~ParamAttrsList() {
+  ParamAttrsLists->RemoveNode(this);
+}
+
+//===----------------------------------------------------------------------===//
+// Function Implementation
+//===----------------------------------------------------------------------===//
+
+Function::Function(const FunctionType *Ty, LinkageTypes Linkage,
+                   const std::string &name, Module *ParentModule)
+  : GlobalValue(PointerType::get(Ty), Value::FunctionVal, 0, 0, Linkage, name) {
+  ParamAttrs = 0;
+  SymTab = new ValueSymbolTable();
+
+  assert((getReturnType()->isFirstClassType() ||getReturnType() == Type::VoidTy)
+         && "LLVM functions cannot return aggregate values!");
+
+  // Create the arguments vector, all arguments start out unnamed.
+  for (unsigned i = 0, e = Ty->getNumParams(); i != e; ++i) {
+    assert(Ty->getParamType(i) != Type::VoidTy &&
+           "Cannot have void typed arguments!");
+    ArgumentList.push_back(new Argument(Ty->getParamType(i)));
+  }
+
+  // Make sure that we get added to a function
+  LeakDetector::addGarbageObject(this);
+
+  if (ParentModule)
+    ParentModule->getFunctionList().push_back(this);
+}
+
+Function::~Function() {
+  dropAllReferences();    // After this it is safe to delete instructions.
+
+  // Delete all of the method arguments and unlink from symbol table...
+  ArgumentList.clear();
+  delete SymTab;
+
+  // Drop our reference to the parameter attributes, if any.
+  if (ParamAttrs)
+    ParamAttrs->dropRef();
+}
+
+void Function::setParent(Module *parent) {
+  if (getParent())
+    LeakDetector::addGarbageObject(this);
+  Parent = parent;
+  if (getParent())
+    LeakDetector::removeGarbageObject(this);
+}
+
+void Function::setParamAttrs(ParamAttrsList *attrs) { 
+  if (ParamAttrs)
+    ParamAttrs->dropRef();
+
+  if (attrs)
+    attrs->addRef();
+
+  ParamAttrs = attrs; 
+}
+
+const FunctionType *Function::getFunctionType() const {
+  return cast<FunctionType>(getType()->getElementType());
+}
+
+bool Function::isVarArg() const {
+  return getFunctionType()->isVarArg();
+}
+
+const Type *Function::getReturnType() const {
+  return getFunctionType()->getReturnType();
+}
+
+void Function::removeFromParent() {
+  getParent()->getFunctionList().remove(this);
+}
+
+void Function::eraseFromParent() {
+  getParent()->getFunctionList().erase(this);
+}
+
+// dropAllReferences() - This function causes all the subinstructions to "let
+// go" of all references that they are maintaining.  This allows one to
+// 'delete' a whole class at a time, even though there may be circular
+// references... first all references are dropped, and all use counts go to
+// zero.  Then everything is deleted for real.  Note that no operations are
+// valid on an object that has "dropped all references", except operator
+// delete.
+//
+void Function::dropAllReferences() {
+  for (iterator I = begin(), E = end(); I != E; ++I)
+    I->dropAllReferences();
+  BasicBlocks.clear();    // Delete all basic blocks...
+}
+
+/// getIntrinsicID - This method returns the ID number of the specified
+/// function, or Intrinsic::not_intrinsic if the function is not an
+/// intrinsic, or if the pointer is null.  This value is always defined to be
+/// zero to allow easy checking for whether a function is intrinsic or not.  The
+/// particular intrinsic functions which correspond to this value are defined in
+/// llvm/Intrinsics.h.
+///
+unsigned Function::getIntrinsicID(bool noAssert) const {
+  const ValueName *ValName = this->getValueName();
+  if (!ValName)
+    return 0;
+  unsigned Len = ValName->getKeyLength();
+  const char *Name = ValName->getKeyData();
+  
+  if (Len < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l'
+      || Name[2] != 'v' || Name[3] != 'm')
+    return 0;  // All intrinsics start with 'llvm.'
+
+  assert((Len != 5 || noAssert) && "'llvm.' is an invalid intrinsic name!");
+
+#define GET_FUNCTION_RECOGNIZER
+#include "llvm/Intrinsics.gen"
+#undef GET_FUNCTION_RECOGNIZER
+  assert(noAssert && "Invalid LLVM intrinsic name");
+  return 0;
+}
+
+std::string Intrinsic::getName(ID id, const Type **Tys, unsigned numTys) { 
+  assert(id < num_intrinsics && "Invalid intrinsic ID!");
+  const char * const Table[] = {
+    "not_intrinsic",
+#define GET_INTRINSIC_NAME_TABLE
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_NAME_TABLE
+  };
+  if (numTys == 0)
+    return Table[id];
+  std::string Result(Table[id]);
+  for (unsigned i = 0; i < numTys; ++i) 
+    if (Tys[i])
+      Result += "." + Tys[i]->getDescription();
+  return Result;
+}
+
+const FunctionType *Intrinsic::getType(ID id, const Type **Tys, 
+                                       unsigned numTys) {
+  const Type *ResultTy = NULL;
+  std::vector<const Type*> ArgTys;
+  bool IsVarArg = false;
+  
+#define GET_INTRINSIC_GENERATOR
+#include "llvm/Intrinsics.gen"
+#undef GET_INTRINSIC_GENERATOR
+
+  return FunctionType::get(ResultTy, ArgTys, IsVarArg); 
+}
+
+Function *Intrinsic::getDeclaration(Module *M, ID id, const Type **Tys, 
+                                    unsigned numTys) {
+// There can never be multiple globals with the same name of different types,
+// because intrinsics must be a specific type.
+  return cast<Function>(M->getOrInsertFunction(getName(id, Tys, numTys), 
+                                               getType(id, Tys, numTys)));
+}
+
+Value *IntrinsicInst::StripPointerCasts(Value *Ptr) {
+  if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Ptr)) {
+    if (CE->getOpcode() == Instruction::BitCast) {
+      if (isa<PointerType>(CE->getOperand(0)->getType()))
+        return StripPointerCasts(CE->getOperand(0));
+    } else if (CE->getOpcode() == Instruction::GetElementPtr) {
+      for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
+        if (!CE->getOperand(i)->isNullValue())
+          return Ptr;
+      return StripPointerCasts(CE->getOperand(0));
+    }
+    return Ptr;
+  }
+
+  if (BitCastInst *CI = dyn_cast<BitCastInst>(Ptr)) {
+    if (isa<PointerType>(CI->getOperand(0)->getType()))
+      return StripPointerCasts(CI->getOperand(0));
+  } else if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Ptr)) {
+    if (GEP->hasAllZeroIndices())
+      return StripPointerCasts(GEP->getOperand(0));
+  }
+  return Ptr;
+}
+
+// vim: sw=2 ai