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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/IR/LegacyPassManager.h"
     22 #include "llvm/Analysis/TargetLibraryInfo.h"
     23 #include <cstring>
     24 
     25 using namespace llvm;
     26 
     27 // Avoid including "llvm-c/Core.h" for compile time, fwd-declare this instead.
     28 extern "C" LLVMContextRef LLVMGetGlobalContext(void);
     29 
     30 inline TargetLibraryInfoImpl *unwrap(LLVMTargetLibraryInfoRef P) {
     31   return reinterpret_cast<TargetLibraryInfoImpl*>(P);
     32 }
     33 
     34 inline LLVMTargetLibraryInfoRef wrap(const TargetLibraryInfoImpl *P) {
     35   TargetLibraryInfoImpl *X = const_cast<TargetLibraryInfoImpl*>(P);
     36   return reinterpret_cast<LLVMTargetLibraryInfoRef>(X);
     37 }
     38 
     39 void llvm::initializeTarget(PassRegistry &Registry) {
     40   initializeTargetLibraryInfoWrapperPassPass(Registry);
     41   initializeTargetTransformInfoWrapperPassPass(Registry);
     42 }
     43 
     44 void LLVMInitializeTarget(LLVMPassRegistryRef R) {
     45   initializeTarget(*unwrap(R));
     46 }
     47 
     48 LLVMTargetDataRef LLVMGetModuleDataLayout(LLVMModuleRef M) {
     49   return wrap(&unwrap(M)->getDataLayout());
     50 }
     51 
     52 void LLVMSetModuleDataLayout(LLVMModuleRef M, LLVMTargetDataRef DL) {
     53   unwrap(M)->setDataLayout(*unwrap(DL));
     54 }
     55 
     56 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep) {
     57   return wrap(new DataLayout(StringRep));
     58 }
     59 
     60 void LLVMDisposeTargetData(LLVMTargetDataRef TD) {
     61   delete unwrap(TD);
     62 }
     63 
     64 void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef TLI,
     65                               LLVMPassManagerRef PM) {
     66   unwrap(PM)->add(new TargetLibraryInfoWrapperPass(*unwrap(TLI)));
     67 }
     68 
     69 char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef TD) {
     70   std::string StringRep = unwrap(TD)->getStringRepresentation();
     71   return strdup(StringRep.c_str());
     72 }
     73 
     74 LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef TD) {
     75   return unwrap(TD)->isLittleEndian() ? LLVMLittleEndian : LLVMBigEndian;
     76 }
     77 
     78 unsigned LLVMPointerSize(LLVMTargetDataRef TD) {
     79   return unwrap(TD)->getPointerSize(0);
     80 }
     81 
     82 unsigned LLVMPointerSizeForAS(LLVMTargetDataRef TD, unsigned AS) {
     83   return unwrap(TD)->getPointerSize(AS);
     84 }
     85 
     86 LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef TD) {
     87   return wrap(unwrap(TD)->getIntPtrType(*unwrap(LLVMGetGlobalContext())));
     88 }
     89 
     90 LLVMTypeRef LLVMIntPtrTypeForAS(LLVMTargetDataRef TD, unsigned AS) {
     91   return wrap(unwrap(TD)->getIntPtrType(*unwrap(LLVMGetGlobalContext()), AS));
     92 }
     93 
     94 LLVMTypeRef LLVMIntPtrTypeInContext(LLVMContextRef C, LLVMTargetDataRef TD) {
     95   return wrap(unwrap(TD)->getIntPtrType(*unwrap(C)));
     96 }
     97 
     98 LLVMTypeRef LLVMIntPtrTypeForASInContext(LLVMContextRef C, LLVMTargetDataRef TD, unsigned AS) {
     99   return wrap(unwrap(TD)->getIntPtrType(*unwrap(C), AS));
    100 }
    101 
    102 unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    103   return unwrap(TD)->getTypeSizeInBits(unwrap(Ty));
    104 }
    105 
    106 unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    107   return unwrap(TD)->getTypeStoreSize(unwrap(Ty));
    108 }
    109 
    110 unsigned long long LLVMABISizeOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    111   return unwrap(TD)->getTypeAllocSize(unwrap(Ty));
    112 }
    113 
    114 unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    115   return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
    116 }
    117 
    118 unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    119   return unwrap(TD)->getABITypeAlignment(unwrap(Ty));
    120 }
    121 
    122 unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef TD, LLVMTypeRef Ty) {
    123   return unwrap(TD)->getPrefTypeAlignment(unwrap(Ty));
    124 }
    125 
    126 unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef TD,
    127                                         LLVMValueRef GlobalVar) {
    128   return unwrap(TD)->getPreferredAlignment(unwrap<GlobalVariable>(GlobalVar));
    129 }
    130 
    131 unsigned LLVMElementAtOffset(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
    132                              unsigned long long Offset) {
    133   StructType *STy = unwrap<StructType>(StructTy);
    134   return unwrap(TD)->getStructLayout(STy)->getElementContainingOffset(Offset);
    135 }
    136 
    137 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef TD, LLVMTypeRef StructTy,
    138                                        unsigned Element) {
    139   StructType *STy = unwrap<StructType>(StructTy);
    140   return unwrap(TD)->getStructLayout(STy)->getElementOffset(Element);
    141 }
    142