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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   return getInfo(Id).TempSuffix;
     51 }
     52 
     53 bool types::onlyAssembleType(ID Id) {
     54   return strchr(getInfo(Id).Flags, 'a');
     55 }
     56 
     57 bool types::onlyPrecompileType(ID Id) {
     58   return strchr(getInfo(Id).Flags, 'p');
     59 }
     60 
     61 bool types::canTypeBeUserSpecified(ID Id) {
     62   return strchr(getInfo(Id).Flags, 'u');
     63 }
     64 
     65 bool types::appendSuffixForType(ID Id) {
     66   return strchr(getInfo(Id).Flags, 'A');
     67 }
     68 
     69 bool types::canLipoType(ID Id) {
     70   return (Id == TY_Nothing ||
     71           Id == TY_Image ||
     72           Id == TY_Object ||
     73           Id == TY_LTO_BC);
     74 }
     75 
     76 bool types::isAcceptedByClang(ID Id) {
     77   switch (Id) {
     78   default:
     79     return false;
     80 
     81   case TY_Asm:
     82   case TY_C: case TY_PP_C:
     83   case TY_CL:
     84   case TY_CUDA:
     85   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
     86   case TY_CXX: case TY_PP_CXX:
     87   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
     88   case TY_CHeader: case TY_PP_CHeader:
     89   case TY_CLHeader:
     90   case TY_ObjCHeader: case TY_PP_ObjCHeader:
     91   case TY_CXXHeader: case TY_PP_CXXHeader:
     92   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
     93   case TY_AST: case TY_ModuleFile:
     94   case TY_LLVM_IR: case TY_LLVM_BC:
     95     return true;
     96   }
     97 }
     98 
     99 bool types::isObjC(ID Id) {
    100   switch (Id) {
    101   default:
    102     return false;
    103 
    104   case TY_ObjC: case TY_PP_ObjC: case TY_PP_ObjC_Alias:
    105   case TY_ObjCXX: case TY_PP_ObjCXX:
    106   case TY_ObjCHeader: case TY_PP_ObjCHeader:
    107   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader: case TY_PP_ObjCXX_Alias:
    108     return true;
    109   }
    110 }
    111 
    112 bool types::isCXX(ID Id) {
    113   switch (Id) {
    114   default:
    115     return false;
    116 
    117   case TY_CXX: case TY_PP_CXX:
    118   case TY_ObjCXX: case TY_PP_ObjCXX: case TY_PP_ObjCXX_Alias:
    119   case TY_CXXHeader: case TY_PP_CXXHeader:
    120   case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader:
    121   case TY_CUDA:
    122     return true;
    123   }
    124 }
    125 
    126 types::ID types::lookupTypeForExtension(const char *Ext) {
    127   return llvm::StringSwitch<types::ID>(Ext)
    128            .Case("c", TY_C)
    129            .Case("i", TY_PP_C)
    130            .Case("m", TY_ObjC)
    131            .Case("M", TY_ObjCXX)
    132            .Case("h", TY_CHeader)
    133            .Case("C", TY_CXX)
    134            .Case("H", TY_CXXHeader)
    135            .Case("f", TY_PP_Fortran)
    136            .Case("F", TY_Fortran)
    137            .Case("s", TY_PP_Asm)
    138            .Case("S", TY_Asm)
    139            .Case("o", TY_Object)
    140            .Case("obj", TY_Object)
    141            .Case("ii", TY_PP_CXX)
    142            .Case("mi", TY_PP_ObjC)
    143            .Case("mm", TY_ObjCXX)
    144            .Case("bc", TY_LLVM_BC)
    145            .Case("cc", TY_CXX)
    146            .Case("CC", TY_CXX)
    147            .Case("cl", TY_CL)
    148            .Case("cp", TY_CXX)
    149            .Case("cu", TY_CUDA)
    150            .Case("hh", TY_CXXHeader)
    151            .Case("ll", TY_LLVM_IR)
    152            .Case("hpp", TY_CXXHeader)
    153            .Case("ads", TY_Ada)
    154            .Case("adb", TY_Ada)
    155            .Case("ast", TY_AST)
    156            .Case("c++", TY_CXX)
    157            .Case("C++", TY_CXX)
    158            .Case("cxx", TY_CXX)
    159            .Case("cpp", TY_CXX)
    160            .Case("CPP", TY_CXX)
    161            .Case("CXX", TY_CXX)
    162            .Case("for", TY_PP_Fortran)
    163            .Case("FOR", TY_PP_Fortran)
    164            .Case("fpp", TY_Fortran)
    165            .Case("FPP", TY_Fortran)
    166            .Case("f90", TY_PP_Fortran)
    167            .Case("f95", TY_PP_Fortran)
    168            .Case("F90", TY_Fortran)
    169            .Case("F95", TY_Fortran)
    170            .Case("mii", TY_PP_ObjCXX)
    171            .Case("pcm", TY_ModuleFile)
    172            .Default(TY_INVALID);
    173 }
    174 
    175 types::ID types::lookupTypeForTypeSpecifier(const char *Name) {
    176   for (unsigned i=0; i<numTypes; ++i) {
    177     types::ID Id = (types::ID) (i + 1);
    178     if (canTypeBeUserSpecified(Id) &&
    179         strcmp(Name, getInfo(Id).Name) == 0)
    180       return Id;
    181   }
    182 
    183   return TY_INVALID;
    184 }
    185 
    186 // FIXME: Why don't we just put this list in the defs file, eh.
    187 void types::getCompilationPhases(ID Id, llvm::SmallVectorImpl<phases::ID> &P) {
    188   if (Id != TY_Object) {
    189     if (getPreprocessedType(Id) != TY_INVALID) {
    190       P.push_back(phases::Preprocess);
    191     }
    192 
    193     if (onlyPrecompileType(Id)) {
    194       P.push_back(phases::Precompile);
    195     } else {
    196       if (!onlyAssembleType(Id)) {
    197         P.push_back(phases::Compile);
    198       }
    199       P.push_back(phases::Assemble);
    200     }
    201   }
    202   if (!onlyPrecompileType(Id)) {
    203     P.push_back(phases::Link);
    204   }
    205   assert(0 < P.size() && "Not enough phases in list");
    206   assert(P.size() <= phases::MaxNumberOfPhases && "Too many phases in list");
    207   return;
    208 }
    209 
    210 ID types::lookupCXXTypeForCType(ID Id) {
    211   switch (Id) {
    212   default:
    213     return Id;
    214 
    215   case types::TY_C:
    216     return types::TY_CXX;
    217   case types::TY_PP_C:
    218     return types::TY_PP_CXX;
    219   case types::TY_CHeader:
    220     return types::TY_CXXHeader;
    221   case types::TY_PP_CHeader:
    222     return types::TY_PP_CXXHeader;
    223   }
    224 }
    225