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      1 //===-- Target.cpp --------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file implements the common infrastructure (including C bindings) for
     11 // libLLVMTarget.a, which implements target information.
     12 //
     13 //===----------------------------------------------------------------------===//
     14 
     15 #include "llvm-c/Target.h"
     16 #include "llvm-c/Initialization.h"
     17 #include "llvm/IR/DataLayout.h"
     18 #include "llvm/IR/LLVMContext.h"
     19 #include "llvm/IR/Value.h"
     20 #include "llvm/InitializePasses.h"
     21 #include "llvm/PassManager.h"
     22 #include "llvm/Target/TargetLibraryInfo.h"
     23 #include <cstring>
     24 
     25 using namespace llvm;
     26 
     27 inline DataLayout *unwrap(LLVMTargetDataRef P) {
     28   return reinterpret_cast<DataLayout*>(P);
     29 }
     30 
     31 inline LLVMTargetDataRef wrap(const DataLayout *P) {
     32   return reinterpret_cast<LLVMTargetDataRef>(const_cast<DataLayout*>(P));
     33 }
     34 
     35 inline TargetLibraryInfo *unwrap(LLVMTargetLibraryInfoRef P) {
     36   return reinterpret_cast<TargetLibraryInfo*>(P);
     37 }
     38 
     39 inline LLVMTargetLibraryInfoRef wrap(const TargetLibraryInfo *P) {
     40   TargetLibraryInfo *X = const_cast<TargetLibraryInfo*>(P);
     41   return reinterpret_cast<LLVMTargetLibraryInfoRef>(X);
     42 }
     43 
     44 void llvm::initializeTarget(PassRegistry &Registry) {
     45   initializeDataLayoutPass(Registry);
     46   initializeTargetLibraryInfoPass(Registry);
     47 }
     48 
     49 void LLVMInitializeTarget(LLVMPassRegistryRef R) {
     50   initializeTarget(*unwrap(R));
     51 }
     52 
     53 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
     54   return wrap(new DataLayout(StringRep));
     55 }
     56 
     57 void LLVMAddTargetData(LLVMTargetDataRef TD, LLVMPassManagerRef PM) {
     58   unwrap(PM)->add(new DataLayout(*unwrap(TD)));
     59 }
     60 
     61 void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef TLI,
     62                               LLVMPassManagerRef PM) {
     63   unwrap(PM)->add(new TargetLibraryInfo(*unwrap(TLI)));
     64 }
     65 
     66 char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef TD) {
     67   std::string StringRep = unwrap(TD)->getStringRepresentation();
     68   return strdup(StringRep.c_str());
     69 }
     70 
     71 LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef TD) {
     72   return unwrap(TD)->isLittleEndian() ? LLVMLittleEndian : LLVMBigEndian;
     73 }
     74 
     75 unsigned LLVMPointerSize(LLVMTargetDataRef TD) {
     76   return unwrap(TD)->getPointerSize(0);
     77 }
     78 
     79 unsigned LLVMPointerSizeForAS(LLVMTargetDataRef TD, unsigned AS) {
     80   return unwrap(TD)->getPointerSize(AS);
     81 }
     82 
     83 LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef TD) {
     84   return wrap(unwrap(TD)->getIntPtrType(getGlobalContext()));
     85 }
     86 
     87 LLVMTypeRef LLVMIntPtrTypeForAS(LLVMTargetDataRef TD, unsigned AS) {
     88   return wrap(unwrap(TD)->getIntPtrType(getGlobalContext(), AS));
     89 }
     90 
     91 unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
     92   return unwrap(TD)->getTypeSizeInBits(unwrap(Ty));
     93 }
     94 
     95 unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
     96   return unwrap(TD)->getTypeStoreSize(unwrap(Ty));
     97 }
     98 
     99 unsigned long long LLVMABISizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    100   return unwrap(TD)->getTypeAllocSize(unwrap(Ty));
    101 }
    102 
    103 unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    104   return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
    105 }
    106 
    107 unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    108   return unwrap(TD)->getCallFrameTypeAlignment(unwrap(Ty));
    109 }
    110 
    111 unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    112   return unwrap(TD)->getPrefTypeAlignment(unwrap(Ty));
    113 }
    114 
    115 unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef TD,
    116                                         LLVMValueRef GlobalVar) {
    117   return unwrap(TD)->getPreferredAlignment(unwrap<GlobalVariable>(GlobalVar));
    118 }
    119 
    120 unsigned LLVMElementAtOffset(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
    121                              unsigned long long Offset) {
    122   StructType *STy = unwrap<StructType>(StructTy);
    123   return unwrap(TD)->getStructLayout(STy)->getElementContainingOffset(Offset);
    124 }
    125 
    126 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
    127                                        unsigned Element) {
    128   StructType *STy = unwrap<StructType>(StructTy);
    129   return unwrap(TD)->getStructLayout(STy)->getElementOffset(Element);
    130 }
    131 
    132 void LLVMDisposeTargetData(LLVMTargetDataRef TD) {
    133   delete unwrap(TD);
    134 }
    135