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      1 /*===-- llvm-c/Target.h - Target Lib C Iface --------------------*- C++ -*-===*/
      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 header declares the C interface to libLLVMTarget.a, which             */
     11 /* implements target information.                                             */
     12 /*                                                                            */
     13 /* Many exotic languages can interoperate with C code but have a harder time  */
     14 /* with C++ due to name mangling. So in addition to C, this interface enables */
     15 /* tools written in such languages.                                           */
     16 /*                                                                            */
     17 /*===----------------------------------------------------------------------===*/
     18 
     19 #ifndef LLVM_C_TARGET_H
     20 #define LLVM_C_TARGET_H
     21 
     22 #include "llvm-c/Core.h"
     23 #include "llvm/Config/llvm-config.h"
     24 
     25 #ifdef __cplusplus
     26 extern "C" {
     27 #endif
     28 
     29 enum LLVMByteOrdering { LLVMBigEndian, LLVMLittleEndian };
     30 
     31 typedef struct LLVMOpaqueTargetData *LLVMTargetDataRef;
     32 typedef struct LLVMOpaqueTargetLibraryInfotData *LLVMTargetLibraryInfoRef;
     33 typedef struct LLVMStructLayout *LLVMStructLayoutRef;
     34 
     35 /* Declare all of the target-initialization functions that are available. */
     36 #define LLVM_TARGET(TargetName) \
     37   void LLVMInitialize##TargetName##TargetInfo(void);
     38 #include "llvm/Config/Targets.def"
     39 #undef LLVM_TARGET  /* Explicit undef to make SWIG happier */
     40 
     41 #define LLVM_TARGET(TargetName) void LLVMInitialize##TargetName##Target(void);
     42 #include "llvm/Config/Targets.def"
     43 #undef LLVM_TARGET  /* Explicit undef to make SWIG happier */
     44 
     45 #define LLVM_TARGET(TargetName) \
     46   void LLVMInitialize##TargetName##TargetMC(void);
     47 #include "llvm/Config/Targets.def"
     48 #undef LLVM_TARGET  /* Explicit undef to make SWIG happier */
     49 
     50 /** LLVMInitializeAllTargetInfos - The main program should call this function if
     51     it wants access to all available targets that LLVM is configured to
     52     support. */
     53 static inline void LLVMInitializeAllTargetInfos(void) {
     54 #define LLVM_TARGET(TargetName) LLVMInitialize##TargetName##TargetInfo();
     55 #include "llvm/Config/Targets.def"
     56 #undef LLVM_TARGET  /* Explicit undef to make SWIG happier */
     57 }
     58 
     59 /** LLVMInitializeAllTargets - The main program should call this function if it
     60     wants to link in all available targets that LLVM is configured to
     61     support. */
     62 static inline void LLVMInitializeAllTargets(void) {
     63 #define LLVM_TARGET(TargetName) LLVMInitialize##TargetName##Target();
     64 #include "llvm/Config/Targets.def"
     65 #undef LLVM_TARGET  /* Explicit undef to make SWIG happier */
     66 }
     67 
     68 /** LLVMInitializeNativeTarget - The main program should call this function to
     69     initialize the native target corresponding to the host.  This is useful
     70     for JIT applications to ensure that the target gets linked in correctly. */
     71 static inline LLVMBool LLVMInitializeNativeTarget(void) {
     72   /* If we have a native target, initialize it to ensure it is linked in. */
     73 #ifdef LLVM_NATIVE_TARGET
     74   LLVM_NATIVE_TARGETINFO();
     75   LLVM_NATIVE_TARGET();
     76   LLVM_NATIVE_TARGETMC();
     77   return 0;
     78 #else
     79   return 1;
     80 #endif
     81 }
     82 
     83 /*===-- Target Data -------------------------------------------------------===*/
     84 
     85 /** Creates target data from a target layout string.
     86     See the constructor llvm::TargetData::TargetData. */
     87 LLVMTargetDataRef LLVMCreateTargetData(const char *StringRep);
     88 
     89 /** Adds target data information to a pass manager. This does not take ownership
     90     of the target data.
     91     See the method llvm::PassManagerBase::add. */
     92 void LLVMAddTargetData(LLVMTargetDataRef, LLVMPassManagerRef);
     93 
     94 /** Adds target library information to a pass manager. This does not take
     95     ownership of the target library info.
     96     See the method llvm::PassManagerBase::add. */
     97 void LLVMAddTargetLibraryInfo(LLVMTargetLibraryInfoRef, LLVMPassManagerRef);
     98 
     99 /** Converts target data to a target layout string. The string must be disposed
    100     with LLVMDisposeMessage.
    101     See the constructor llvm::TargetData::TargetData. */
    102 char *LLVMCopyStringRepOfTargetData(LLVMTargetDataRef);
    103 
    104 /** Returns the byte order of a target, either LLVMBigEndian or
    105     LLVMLittleEndian.
    106     See the method llvm::TargetData::isLittleEndian. */
    107 enum LLVMByteOrdering LLVMByteOrder(LLVMTargetDataRef);
    108 
    109 /** Returns the pointer size in bytes for a target.
    110     See the method llvm::TargetData::getPointerSize. */
    111 unsigned LLVMPointerSize(LLVMTargetDataRef);
    112 
    113 /** Returns the integer type that is the same size as a pointer on a target.
    114     See the method llvm::TargetData::getIntPtrType. */
    115 LLVMTypeRef LLVMIntPtrType(LLVMTargetDataRef);
    116 
    117 /** Computes the size of a type in bytes for a target.
    118     See the method llvm::TargetData::getTypeSizeInBits. */
    119 unsigned long long LLVMSizeOfTypeInBits(LLVMTargetDataRef, LLVMTypeRef);
    120 
    121 /** Computes the storage size of a type in bytes for a target.
    122     See the method llvm::TargetData::getTypeStoreSize. */
    123 unsigned long long LLVMStoreSizeOfType(LLVMTargetDataRef, LLVMTypeRef);
    124 
    125 /** Computes the ABI size of a type in bytes for a target.
    126     See the method llvm::TargetData::getTypeAllocSize. */
    127 unsigned long long LLVMABISizeOfType(LLVMTargetDataRef, LLVMTypeRef);
    128 
    129 /** Computes the ABI alignment of a type in bytes for a target.
    130     See the method llvm::TargetData::getTypeABISize. */
    131 unsigned LLVMABIAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
    132 
    133 /** Computes the call frame alignment of a type in bytes for a target.
    134     See the method llvm::TargetData::getTypeABISize. */
    135 unsigned LLVMCallFrameAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
    136 
    137 /** Computes the preferred alignment of a type in bytes for a target.
    138     See the method llvm::TargetData::getTypeABISize. */
    139 unsigned LLVMPreferredAlignmentOfType(LLVMTargetDataRef, LLVMTypeRef);
    140 
    141 /** Computes the preferred alignment of a global variable in bytes for a target.
    142     See the method llvm::TargetData::getPreferredAlignment. */
    143 unsigned LLVMPreferredAlignmentOfGlobal(LLVMTargetDataRef,
    144                                         LLVMValueRef GlobalVar);
    145 
    146 /** Computes the structure element that contains the byte offset for a target.
    147     See the method llvm::StructLayout::getElementContainingOffset. */
    148 unsigned LLVMElementAtOffset(LLVMTargetDataRef, LLVMTypeRef StructTy,
    149                              unsigned long long Offset);
    150 
    151 /** Computes the byte offset of the indexed struct element for a target.
    152     See the method llvm::StructLayout::getElementContainingOffset. */
    153 unsigned long long LLVMOffsetOfElement(LLVMTargetDataRef, LLVMTypeRef StructTy,
    154                                        unsigned Element);
    155 
    156 /** Deallocates a TargetData.
    157     See the destructor llvm::TargetData::~TargetData. */
    158 void LLVMDisposeTargetData(LLVMTargetDataRef);
    159 
    160 
    161 #ifdef __cplusplus
    162 }
    163 
    164 namespace llvm {
    165   class TargetData;
    166   class TargetLibraryInfo;
    167 
    168   inline TargetData *unwrap(LLVMTargetDataRef P) {
    169     return reinterpret_cast<TargetData*>(P);
    170   }
    171 
    172   inline LLVMTargetDataRef wrap(const TargetData *P) {
    173     return reinterpret_cast<LLVMTargetDataRef>(const_cast<TargetData*>(P));
    174   }
    175 
    176   inline TargetLibraryInfo *unwrap(LLVMTargetLibraryInfoRef P) {
    177     return reinterpret_cast<TargetLibraryInfo*>(P);
    178   }
    179 
    180   inline LLVMTargetLibraryInfoRef wrap(const TargetLibraryInfo *P) {
    181     TargetLibraryInfo *X = const_cast<TargetLibraryInfo*>(P);
    182     return reinterpret_cast<LLVMTargetLibraryInfoRef>(X);
    183   }
    184 }
    185 
    186 #endif /* defined(__cplusplus) */
    187 
    188 #endif
    189