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https://github.com/c64scene-ar/llvm-6502.git
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68498cefe6
there are probably more to kill git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@261 91177308-0d34-0410-b5e6-96231b3b80d8
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
// $Id$
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//***************************************************************************
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// File:
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// TargetMachine.cpp
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//
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// Purpose:
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//
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// History:
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// 7/12/01 - Vikram Adve - Created
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//**************************************************************************/
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//*************************** User Include Files ***************************/
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#include "llvm/CodeGen/TargetMachine.h"
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#include "llvm/DerivedTypes.h"
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//************************ Class Implementations **************************/
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//---------------------------------------------------------------------------
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// function TargetMachine::findOptimalMemberOffsets
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//
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// Purpose:
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// Compute optimal offsets for the members of a structure.
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// Returns a vector of unsigned ints, one per member.
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// Caller is responsible for freeing the vector.
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//---------------------------------------------------------------------------
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unsigned int
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TargetMachine::findOptimalStorageSize(const Type* ty) const
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{
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switch(ty->getPrimitiveID())
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{
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case Type::BoolTyID:
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case Type::UByteTyID: case Type::SByteTyID:
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case Type::UShortTyID: case Type::ShortTyID:
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return optSizeForSubWordData;
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break;
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case Type::UIntTyID: case Type::IntTyID:
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return intSize;
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break;
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case Type::FloatTyID:
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return floatSize;
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break;
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case Type::ULongTyID: case Type::LongTyID:
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return longSize;
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break;
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case Type::DoubleTyID:
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return doubleSize;
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break;
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case Type::PointerTyID:
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case Type::LabelTyID: case Type::MethodTyID:
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return pointerSize;
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break;
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case Type::ArrayTyID:
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{
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ArrayType* aty = (ArrayType*) ty;
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assert(aty->getNumElements() >= 0 &&
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"Attempting to compute size for unknown-size array");
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return (unsigned) aty->getNumElements() *
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this->findOptimalStorageSize(aty->getElementType());
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break;
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}
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case Type::StructTyID:
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{// This code should be invoked only from StructType::getStorageSize().
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StructType* sty = (StructType*) ty;
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unsigned lastMemberIdx = sty->getElementTypes().size() - 1;
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unsigned lastMemberOffset = sty->getElementOffset(lastMemberIdx, *this);
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unsigned storageSize = lastMemberOffset
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+ this->findOptimalStorageSize(sty->getElementTypes()[lastMemberIdx]);
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return storageSize;
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break;
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}
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default:
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assert(0 && "Unexpected type in `findOptimalStorageSize'");
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return 0;
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break;
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}
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}
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unsigned int*
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TargetMachine::findOptimalMemberOffsets(const StructType* stype) const
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{
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int numMembers = stype->getElementTypes().size();
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unsigned int* offsetVec = new unsigned int[numMembers];
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unsigned int netOffset = 0;
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for (int i = 0; i < numMembers; i++)
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{
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offsetVec[i] = netOffset;
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const Type* memberType = stype->getElementTypes()[i];
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netOffset += this->findOptimalStorageSize(memberType);
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}
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return offsetVec;
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}
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//---------------------------------------------------------------------------
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