lib/Target/TargetMachine.cpp

   1 //===-- TargetMachine.cpp - General Target Information ---------------------==//
   2 //
   3 // This file describes the general parts of a Target machine.
   4 // This file also implements TargetCacheInfo.
   5 //
   6 //===----------------------------------------------------------------------===//
   7
   8 #include "llvm/Target/TargetMachine.h"
   9 #include "llvm/Target/TargetCacheInfo.h"
  10 #include "llvm/Type.h"
  11
  12 //---------------------------------------------------------------------------
  13 // class TargetMachine
  14 //
  15 // Purpose:
  16 //   Machine description.
  17 //
  18 //---------------------------------------------------------------------------
  19
  20
  21 // function TargetMachine::findOptimalStorageSize
  22 //
  23 unsigned TargetMachine::findOptimalStorageSize(const Type *Ty) const {
  24   // All integer types smaller than ints promote to 4 byte integers.
  25   if (Ty->isIntegral() && Ty->getPrimitiveSize() < 4)
  26     return 4;
  27
  28   return DataLayout.getTypeSize(Ty);
  29 }
  30
  31
  32 //---------------------------------------------------------------------------
  33 // class TargetCacheInfo
  34 //
  35 // Purpose:
  36 //   Describes properties of the target cache architecture.
  37 //---------------------------------------------------------------------------
  38
  39 void TargetCacheInfo::Initialize() {
  40   numLevels = 2;
  41   cacheLineSizes.push_back(16);  cacheLineSizes.push_back(32);
  42   cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20);
  43   cacheAssoc.push_back(1);       cacheAssoc.push_back(4);
  44 }