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      1 //===--- Types.cpp - Driver input & temporary type information ------------===//
      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 #include "clang/Driver/Types.h"
     11 #include "llvm/ADT/STLExtras.h"
     12 #include "llvm/ADT/StringSwitch.h"
     13 #include <cassert>
     14 #include <string.h>
     15 
     16 using namespace clang::driver;
     17 using namespace clang::driver::types;
     18 
     19 struct TypeInfo {
     20   const char *Name;
     21   const char *Flags;
     22   const char *TempSuffix;
     23   ID PreprocessedType;
     24 };
     25 
     26 static const TypeInfo TypeInfos[] = {
     27 #define TYPE(NAME, ID, PP_TYPE, TEMP_SUFFIX, FLAGS) \
     28   { NAME, FLAGS, TEMP_SUFFIX, TY_##PP_TYPE, },
     29 #include "clang/Driver/Types.def"
     30 #undef TYPE
     31 };
     32 static const unsigned numTypes = llvm::array_lengthof(TypeInfos);
     33 
     34 static const TypeInfo &getInfo(unsigned id) {
     35   assert(id > 0 && id - 1 < numTypes && "Invalid Type ID.");
     36   return TypeInfos[id - 1];
     37 }
     38 
     39 const char *types::getTypeName(ID Id) {
     40   return getInfo(Id).Name;
     41 }
     42 
     43 types::ID types::getPreprocessedType(ID Id) {
     44   return getInfo(Id).PreprocessedType;
     45 }
     46 
     47 const char *types::getTypeTempSuffix(ID Id, bool CLMode) {
     48   if (Id == TY_Object && CLMode)
     49     return "obj";
     50   if (Id == TY_Image && CLMode)
     51     return "exe";
     52   if (Id == TY_PP_Asm && CLMode)
     53     return "asm";
     54   return getInfo(Id).TempSuffix;
     55 }
     56 
     57 bool types::onlyAssembleType(ID Id) {
     58   return strchr(getInfo(Id).Flags, 'a');
     59 }
     60 
     61 bool types::onlyPrecompileType(ID Id) {
     62   return strchr(getInfo(Id).Flags, 'p');
     63 }
     64 
     65 bool types::canTypeBeUserSpecified(ID Id) {
     66   return strchr(getInfo(Id).Flags, 'u');
     67 }
     68 
     69 bool types::appendSuffixForType(ID Id) {
     70   return strchr(getInfo(Id).Flags, 'A');
     71 }
     72 
     73 bool types::canLipoType(ID Id) {
     74   return (Id == TY_Nothing ||
     75           Id == TY_Image ||
     76           Id == TY_Object ||
     77           Id == TY_LTO_BC);
     78 }
     79 
     80 bool types::isAcceptedByClang(ID Id) {
     81   switch (Id) {
     82   default:
     83     return false;
     84 
     85   case TY_Asm:
     86   case TY_C: case TY_PP_C:
     87   case TY_CL:
     88   case TY_CUDA: case TY_PP_CUDA:
     89   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
     90   case TY_CXX: case TY_PP_CXX:
     91   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
     92   case TY_CHeader: case TY_PP_CHeader:
     93   case TY_CLHeader:
     94   case TY_ObjCHeader: case TY_PP_ObjCHeader:
     95   case TY_CXXHeader: case TY_PP_CXXHeader:
     96   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
     97   case TY_AST: case TY_ModuleFile:
     98   case TY_LLVM_IR: case TY_LLVM_BC:
     99     return true;
    100   }
    101 }
    102 
    103 bool types::isObjC(ID Id) {
    104   switch (Id) {
    105   default:
    106     return false;
    107 
    108   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
    109   case TY_ObjCXX: case TY_PP_ObjCXX:
    110   case TY_ObjCHeader: case TY_PP_ObjCHeader:
    111   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader: case TY_PP_ObjCXX_Alias:
    112     return true;
    113   }
    114 }
    115 
    116 bool types::isCXX(ID Id) {
    117   switch (Id) {
    118   default:
    119     return false;
    120 
    121   case TY_CXX: case TY_PP_CXX:
    122   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
    123   case TY_CXXHeader: case TY_PP_CXXHeader:
    124   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
    125   case TY_CUDA: case TY_PP_CUDA:
    126     return true;
    127   }
    128 }
    129 
    130 types::ID types::lookupTypeForExtension(const char *Ext) {
    131   return llvm::StringSwitch<types::ID>(Ext)
    132            .Case("c", TY_C)
    133            .Case("i", TY_PP_C)
    134            .Case("m", TY_ObjC)
    135            .Case("M", TY_ObjCXX)
    136            .Case("h", TY_CHeader)
    137            .Case("C", TY_CXX)
    138            .Case("H", TY_CXXHeader)
    139            .Case("f", TY_PP_Fortran)
    140            .Case("F", TY_Fortran)
    141            .Case("s", TY_PP_Asm)
    142            .Case("asm", TY_PP_Asm)
    143            .Case("S", TY_Asm)
    144            .Case("o", TY_Object)
    145            .Case("obj", TY_Object)
    146            .Case("lib", TY_Object)
    147            .Case("ii", TY_PP_CXX)
    148            .Case("mi", TY_PP_ObjC)
    149            .Case("mm", TY_ObjCXX)
    150            .Case("bc", TY_LLVM_BC)
    151            .Case("cc", TY_CXX)
    152            .Case("CC", TY_CXX)
    153            .Case("cl", TY_CL)
    154            .Case("cp", TY_CXX)
    155            .Case("cu", TY_CUDA)
    156            .Case("cui", TY_PP_CUDA)
    157            .Case("hh", TY_CXXHeader)
    158            .Case("ll", TY_LLVM_IR)
    159            .Case("hpp", TY_CXXHeader)
    160            .Case("ads", TY_Ada)
    161            .Case("adb", TY_Ada)
    162            .Case("ast", TY_AST)
    163            .Case("c++", TY_CXX)
    164            .Case("C++", TY_CXX)
    165            .Case("cxx", TY_CXX)
    166            .Case("cpp", TY_CXX)
    167            .Case("CPP", TY_CXX)
    168            .Case("CXX", TY_CXX)
    169            .Case("for", TY_PP_Fortran)
    170            .Case("FOR", TY_PP_Fortran)
    171            .Case("fpp", TY_Fortran)
    172            .Case("FPP", TY_Fortran)
    173            .Case("f90", TY_PP_Fortran)
    174            .Case("f95", TY_PP_Fortran)
    175            .Case("F90", TY_Fortran)
    176            .Case("F95", TY_Fortran)
    177            .Case("mii", TY_PP_ObjCXX)
    178            .Case("pcm", TY_ModuleFile)
    179            .Case("pch", TY_PCH)
    180            .Case("gch", TY_PCH)
    181            .Default(TY_INVALID);
    182 }
    183 
    184 types::ID types::lookupTypeForTypeSpecifier(const char *Name) {
    185   for (unsigned i=0; i<numTypes; ++i) {
    186     types::ID Id = (types::ID) (i + 1);
    187     if (canTypeBeUserSpecified(Id) &&
    188         strcmp(Name, getInfo(Id).Name) == 0)
    189       return Id;
    190   }
    191 
    192   return TY_INVALID;
    193 }
    194 
    195 // FIXME: Why don't we just put this list in the defs file, eh.
    196 void types::getCompilationPhases(ID Id, llvm::SmallVectorImpl<phases::ID> &P) {
    197   if (Id != TY_Object) {
    198     if (getPreprocessedType(Id) != TY_INVALID) {
    199       P.push_back(phases::Preprocess);
    200     }
    201 
    202     if (onlyPrecompileType(Id)) {
    203       P.push_back(phases::Precompile);
    204     } else {
    205       if (!onlyAssembleType(Id)) {
    206         P.push_back(phases::Compile);
    207         P.push_back(phases::Backend);
    208       }
    209       P.push_back(phases::Assemble);
    210     }
    211   }
    212   if (!onlyPrecompileType(Id)) {
    213     P.push_back(phases::Link);
    214   }
    215   assert(0 < P.size() && "Not enough phases in list");
    216   assert(P.size() <= phases::MaxNumberOfPhases && "Too many phases in list");
    217   return;
    218 }
    219 
    220 ID types::lookupCXXTypeForCType(ID Id) {
    221   switch (Id) {
    222   default:
    223     return Id;
    224 
    225   case types::TY_C:
    226     return types::TY_CXX;
    227   case types::TY_PP_C:
    228     return types::TY_PP_CXX;
    229   case types::TY_CHeader:
    230     return types::TY_CXXHeader;
    231   case types::TY_PP_CHeader:
    232     return types::TY_PP_CXXHeader;
    233   }
    234 }
    235