llvm/lib/Target/TargetMachine.cpp
2002-10-29 21:47:50 +00:00

51 lines
1.7 KiB
C++

//===-- TargetMachine.cpp - General Target Information ---------------------==//
//
// This file describes the general parts of a Target machine.
// This file also implements MachineCacheInfo.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/MachineCacheInfo.h"
#include "llvm/Type.h"
//---------------------------------------------------------------------------
// class TargetMachine
//
// Purpose:
// Machine description.
//
//---------------------------------------------------------------------------
// function TargetMachine::findOptimalStorageSize
//
// Purpose:
// This default implementation assumes that all sub-word data items use
// space equal to optSizeForSubWordData, and all other primitive data
// items use space according to the type.
//
unsigned TargetMachine::findOptimalStorageSize(const Type *Ty) const {
// Round integral values smaller than SubWordDataSize up to SubWordDataSize
if (Ty->isIntegral() &&
Ty->getPrimitiveSize() < DataLayout.getSubWordDataSize())
return DataLayout.getSubWordDataSize();
return DataLayout.getTypeSize(Ty);
}
//---------------------------------------------------------------------------
// class MachineCacheInfo
//
// Purpose:
// Describes properties of the target cache architecture.
//---------------------------------------------------------------------------
void MachineCacheInfo::Initialize() {
numLevels = 2;
cacheLineSizes.push_back(16); cacheLineSizes.push_back(32);
cacheSizes.push_back(1 << 15); cacheSizes.push_back(1 << 20);
cacheAssoc.push_back(1); cacheAssoc.push_back(4);
}