text: //===-- Target.cpp --------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file implements the common infrastructure (including C bindings) for 
  // libLLVMTarget.a, which implements target information.
  //
  //===----------------------------------------------------------------------===//
  
  #include "llvm-c/Target.h"
  #include "llvm-c/Initialization.h"
  #include "llvm/IR/DataLayout.h"
  #include "llvm/IR/LLVMContext.h"
  #include "llvm/IR/Value.h"
  #include "llvm/InitializePasses.h"
  #include "llvm/PassManager.h"
  #include "llvm/Target/TargetLibraryInfo.h"
  #include <cstring>
  
  using namespace llvm;
  
  inline TargetLibraryInfo *unwrap(LLVMTargetLibraryInfoRef P) {
    return reinterpret_cast<TargetLibraryInfo*>(P);
  }
  
  inline LLVMTargetLibraryInfoRef wrap(const TargetLibraryInfo *P) {
    TargetLibraryInfo *X = const_cast<TargetLibraryInfo*>(P);
    return reinterpret_cast<LLVMTargetLibraryInfoRef>(X);
  }
  
  void llvm::initializeTarget(PassRegistry &Registry) {
    initializeDataLayoutPassPass(Registry);
    initializeTargetLibraryInfoPass(Registry);
  }
  
  void LLVMInitializeTarget(LLVMPassRegistryRef R) {
    initializeTarget(*unwrap(R));
  }
  
  LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
    return wrap(new DataLayout(StringRep));
  }
  
  void LLVMAddTargetData(LLVMTargetDataRef TD, LLVMPassManagerRef PM) {
    // The DataLayoutPass must now be in sync with the module. Unfortunatelly we
    // cannot enforce that from the C api.
    unwrap(PM)->add(new DataLayoutPass(*unwrap(TD)));
  }
  
  void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef TLI,
                                LLVMPassManagerRef PM) {
    unwrap(PM)->add(new TargetLibraryInfo(*unwrap(TLI)));
  }
  
  char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef TD) {
    std::string StringRep = unwrap(TD)->getStringRepresentation();
    return strdup(StringRep.c_str());
  }
  
  LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef TD) {
    return unwrap(TD)->isLittleEndian() ? LLVMLittleEndian : LLVMBigEndian;
  }
  
  unsigned LLVMPointerSize(LLVMTargetDataRef TD) {
    return unwrap(TD)->getPointerSize(0);
  }
  
  unsigned LLVMPointerSizeForAS(LLVMTargetDataRef TD, unsigned AS) {
    return unwrap(TD)->getPointerSize(AS);
  }
  
  LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef TD) {
    return wrap(unwrap(TD)->getIntPtrType(getGlobalContext()));
  }
  
  LLVMTypeRef LLVMIntPtrTypeForAS(LLVMTargetDataRef TD, unsigned AS) {
    return wrap(unwrap(TD)->getIntPtrType(getGlobalContext(), AS));
  }
  
  LLVMTypeRef LLVMIntPtrTypeInContext(LLVMContextRef C, LLVMTargetDataRef TD) {
    return wrap(unwrap(TD)->getIntPtrType(*unwrap(C)));
  }
  
  LLVMTypeRef LLVMIntPtrTypeForASInContext(LLVMContextRef C, LLVMTargetDataRef TD, unsigned AS) {
    return wrap(unwrap(TD)->getIntPtrType(*unwrap(C), AS));
  }
  
  unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getTypeSizeInBits(unwrap(Ty));
  }
  
  unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getTypeStoreSize(unwrap(Ty));
  }
  
  unsigned long long LLVMABISizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getTypeAllocSize(unwrap(Ty));
  }
  
  unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
  }
  
  unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
  }
  
  unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    return unwrap(TD)->getPrefTypeAlignment(unwrap(Ty));
  }
  
  unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef TD,
                                          LLVMValueRef GlobalVar) {
    return unwrap(TD)->getPreferredAlignment(unwrap<GlobalVariable>(GlobalVar));
  }
  
  unsigned LLVMElementAtOffset(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
                               unsigned long long Offset) {
    StructType *STy = unwrap<StructType>(StructTy);
    return unwrap(TD)->getStructLayout(STy)->getElementContainingOffset(Offset);
  }
  
  unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
                                         unsigned Element) {
    StructType *STy = unwrap<StructType>(StructTy);
    return unwrap(TD)->getStructLayout(STy)->getElementOffset(Element);
  }
  
  void LLVMDisposeTargetData(LLVMTargetDataRef TD) {
    delete unwrap(TD);
  }
  