utils/TableGen/TGValueTypes.cpp

   1 //===- ValueTypes.cpp - Tablegen extended ValueType implementation --------===//
   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 // The MVT type is used by tablegen as well as in LLVM. In order to handle
  11 // extended types, the MVT type uses support functions that call into
  12 // LLVM's type system code. These aren't accessible in tablegen, so this
  13 // file provides simple replacements.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #include "llvm/CodeGen/ValueTypes.h"
  18 #include <map>
  19 #include <vector>
  20 using namespace llvm;
  21
  22 namespace llvm {
  23
  24 class Type {
  25 public:
  26   virtual unsigned getSizeInBits() const = 0;
  27   virtual ~Type() {}
  28 };
  29
  30 }
  31
  32 class ExtendedIntegerType : public Type {
  33   unsigned BitWidth;
  34 public:
  35   explicit ExtendedIntegerType(unsigned bits)
  36     : BitWidth(bits) {}
  37   unsigned getSizeInBits() const {
  38     return getBitWidth();
  39   }
  40   unsigned getBitWidth() const {
  41     return BitWidth;
  42   }
  43 };
  44
  45 class ExtendedVectorType : public Type {
  46   MVT ElementType;
  47   unsigned NumElements;
  48 public:
  49   ExtendedVectorType(MVT elty, unsigned num)
  50     : ElementType(elty), NumElements(num) {}
  51   unsigned getSizeInBits() const {
  52     return getNumElements() * getElementType().getSizeInBits();
  53   }
  54   MVT getElementType() const {
  55     return ElementType;
  56   }
  57   unsigned getNumElements() const {
  58     return NumElements;
  59   }
  60 };
  61
  62 static std::map<unsigned, const Type *>
  63   ExtendedIntegerTypeMap;
  64 static std::map<std::pair<uintptr_t, uintptr_t>, const Type *>
  65   ExtendedVectorTypeMap;
  66
  67 MVT MVT::getExtendedIntegerVT(unsigned BitWidth) {
  68   const Type *&ET = ExtendedIntegerTypeMap[BitWidth];
  69   if (!ET) ET = new ExtendedIntegerType(BitWidth);
  70   MVT VT;
  71   VT.LLVMTy = ET;
  72   assert(VT.isExtended() && "Type is not extended!");
  73   return VT;
  74 }
  75
  76 MVT MVT::getExtendedVectorVT(MVT VT, unsigned NumElements) {
  77   const Type *&ET = ExtendedVectorTypeMap[std::make_pair(VT.getRawBits(),
  78                                                          NumElements)];
  79   if (!ET) ET = new ExtendedVectorType(VT, NumElements);
  80   MVT ResultVT;
  81   ResultVT.LLVMTy = ET;
  82   assert(ResultVT.isExtended() && "Type is not extended!");
  83   return ResultVT;
  84 }
  85
  86 bool MVT::isExtendedFloatingPoint() const {
  87   assert(isExtended() && "Type is not extended!");
  88   // Extended floating-point types are not supported yet.
  89   return false;
  90 }
  91
  92 bool MVT::isExtendedInteger() const {
  93   assert(isExtended() && "Type is not extended!");
  94   return dynamic_cast<const ExtendedIntegerType *>(LLVMTy) != 0;
  95 }
  96
  97 bool MVT::isExtendedVector() const {
  98   assert(isExtended() && "Type is not extended!");
  99   return dynamic_cast<const ExtendedVectorType *>(LLVMTy) != 0;
 100 }
 101
 102 bool MVT::isExtended64BitVector() const {
 103   assert(isExtended() && "Type is not extended!");
 104   return isExtendedVector() && getSizeInBits() == 64;
 105 }
 106
 107 bool MVT::isExtended128BitVector() const {
 108   assert(isExtended() && "Type is not extended!");
 109   return isExtendedVector() && getSizeInBits() == 128;
 110 }
 111
 112 MVT MVT::getExtendedVectorElementType() const {
 113   assert(isExtendedVector() && "Type is not an extended vector!");
 114   return static_cast<const ExtendedVectorType *>(LLVMTy)->getElementType();
 115 }
 116
 117 unsigned MVT::getExtendedVectorNumElements() const {
 118   assert(isExtendedVector() && "Type is not an extended vector!");
 119   return static_cast<const ExtendedVectorType *>(LLVMTy)->getNumElements();
 120 }
 121
 122 unsigned MVT::getExtendedSizeInBits() const {
 123   assert(isExtended() && "Type is not extended!");
 124   return LLVMTy->getSizeInBits();
 125 }