mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-20 03:23:01 +02:00
Initial checkin of TargetData code
llvm-svn: 384
This commit is contained in:
Chris Lattner
parent
eaebbaf5bc
commit
6336546710
85
include/llvm/CodeGen/TargetData.h
Normal file
85
include/llvm/CodeGen/TargetData.h
Normal file
@ -0,0 +1,85 @@
|
||||
//===-- llvm/TargetData.h - Data size & alignment routines -------*- C++ -*-==//
|
||||
//
|
||||
// This file defines target properties related to datatype size/offset/alignment
|
||||
// information. It uses lazy annotations to cache information about how
|
||||
// structure types are laid out and used.
|
||||
//
|
||||
// This structure should be created once, filled in if the defaults are not
|
||||
// correct and then passed around by const&. None of the members functions
|
||||
// require modification to the object.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef LLVM_CODEGEN_TARGETDATA_H
|
||||
#define LLVM_CODEGEN_TARGETDATA_H
|
||||
|
||||
#include "llvm/Type.h"
|
||||
#include <vector>
|
||||
|
||||
class StructType;
|
||||
class StructLayout;
|
||||
|
||||
class TargetData {
|
||||
unsigned char ByteAlignment; // Defaults to 1 bytes
|
||||
unsigned char ShortAlignment; // Defaults to 2 bytes
|
||||
unsigned char IntAlignment; // Defaults to 4 bytes
|
||||
unsigned char LongAlignment; // Defaults to 8 bytes
|
||||
unsigned char FloatAlignment; // Defaults to 4 bytes
|
||||
unsigned char DoubleAlignment; // Defaults to 8 bytes
|
||||
unsigned char PointerSize; // Defaults to 8 bytes
|
||||
unsigned char PointerAlignment; // Defaults to 8 bytes
|
||||
AnnotationID AID; // AID for structure layout annotation
|
||||
|
||||
static Annotation *TypeAnFactory(AnnotationID, Annotable *, void *);
|
||||
public:
|
||||
TargetData(const string &TargetName, unsigned char PtrSize = 8,
|
||||
unsigned char PtrAl = 8, unsigned char DoubleAl = 8,
|
||||
unsigned char FloatAl = 4, unsigned char LongAl = 8,
|
||||
unsigned char IntAl = 4, unsigned char ShortAl = 2,
|
||||
unsigned char ByteAl = 1);
|
||||
~TargetData(); // Not virtual, do not subclass this class
|
||||
|
||||
unsigned char getByteAlignment() const { return ByteAlignment; }
|
||||
unsigned char getShortAlignment() const { return ShortAlignment; }
|
||||
unsigned char getIntAlignment() const { return IntAlignment; }
|
||||
unsigned char getLongAlignment() const { return LongAlignment; }
|
||||
unsigned char getFloatAlignment() const { return FloatAlignment; }
|
||||
unsigned char getDoubleAlignment() const { return DoubleAlignment; }
|
||||
unsigned char getPointerAlignment() const { return PointerAlignment; }
|
||||
unsigned char getPointerSize() const { return PointerSize; }
|
||||
AnnotationID getStructLayoutAID() const { return AID; }
|
||||
|
||||
// getTypeSize - Return the number of bytes neccesary to hold the specified
|
||||
// type
|
||||
unsigned getTypeSize (const Type *Ty) const;
|
||||
|
||||
// getTypeAlignment - Return the minimum required alignment for the specified
|
||||
// type
|
||||
unsigned char getTypeAlignment(const Type *Ty) const;
|
||||
|
||||
// getIndexOffset - return the offset from the beginning of the type for the
|
||||
// specified indices. This is used to implement getElementPtr and load and
|
||||
// stores that include the implicit form of getelementptr.
|
||||
//
|
||||
unsigned getIndexedOffset(const Type *Ty,
|
||||
const vector<ConstPoolVal*> &Indices) const;
|
||||
|
||||
inline const StructLayout *getStructLayout(const StructType *Ty) const {
|
||||
return (const StructLayout*)((Value*)Ty)->getOrCreateAnnotation(AID);
|
||||
}
|
||||
};
|
||||
|
||||
// This annotation (attached ONLY to StructType classes) is used to lazily
|
||||
// calculate structure layout information for a target machine, based on the
|
||||
// TargetData structure.
|
||||
//
|
||||
struct StructLayout : public Annotation {
|
||||
vector<unsigned> MemberOffsets;
|
||||
unsigned StructSize;
|
||||
unsigned StructAlignment;
|
||||
private:
|
||||
friend class TargetData; // Only TargetData can create this class
|
||||
inline StructLayout(const StructType *ST, const TargetData &TD);
|
||||
};
|
||||
|
||||
#endif
|
||||
181
lib/CodeGen/TargetMachine/TargetData.cpp
Normal file
181
lib/CodeGen/TargetMachine/TargetData.cpp
Normal file
@ -0,0 +1,181 @@
|
||||
//===-- TargetData.cpp - Data size & alignment routines --------------------==//
|
||||
//
|
||||
// This file defines target properties related to datatype size/offset/alignment
|
||||
// information. It uses lazy annotations to cache information about how
|
||||
// structure types are laid out and used.
|
||||
//
|
||||
// This structure should be created once, filled in if the defaults are not
|
||||
// correct and then passed around by const&. None of the members functions
|
||||
// require modification to the object.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#include "llvm/CodeGen/TargetData.h"
|
||||
#include "llvm/DerivedTypes.h"
|
||||
#include "llvm/ConstPoolVals.h"
|
||||
|
||||
static inline void getTypeInfo(const Type *Ty, const TargetData *TD,
|
||||
unsigned &Size, unsigned char &Alignment);
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
// Support for StructLayout Annotation
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
StructLayout::StructLayout(const StructType *ST, const TargetData &TD)
|
||||
: Annotation(TD.getStructLayoutAID()) {
|
||||
StructAlignment = 0;
|
||||
StructSize = 0;
|
||||
|
||||
// Loop over each of the elements, placing them in memory...
|
||||
for (StructType::ElementTypes::const_iterator
|
||||
TI = ST->getElementTypes().begin(),
|
||||
TE = ST->getElementTypes().end(); TI != TE; ++TI) {
|
||||
const Type *Ty = *TI;
|
||||
unsigned char A;
|
||||
unsigned TySize, TyAlign;
|
||||
getTypeInfo(Ty, &TD, TySize, A); TyAlign = A;
|
||||
|
||||
// Add padding if neccesary to make the data element aligned properly...
|
||||
if (StructSize % TyAlign != 0)
|
||||
StructSize = (StructSize/TyAlign + 1) * TyAlign; // Add padding...
|
||||
|
||||
// Keep track of maximum alignment constraint
|
||||
StructAlignment = max(TyAlign, StructAlignment);
|
||||
|
||||
MemberOffsets.push_back(StructSize);
|
||||
StructSize += TySize; // Consume space for this data item...
|
||||
}
|
||||
|
||||
// Add padding to the end of the struct so that it could be put in an array
|
||||
// and all array elements would be aligned correctly.
|
||||
if (StructSize % StructAlignment != 0)
|
||||
StructSize = (StructSize/StructAlignment + 1) * StructAlignment;
|
||||
|
||||
if (StructSize == 0) {
|
||||
StructSize = 1; // Empty struct is 1 byte
|
||||
StructAlignment = 1;
|
||||
}
|
||||
}
|
||||
|
||||
Annotation *TargetData::TypeAnFactory(AnnotationID AID, Annotable *T, void *D) {
|
||||
const TargetData &TD = *(const TargetData*)D;
|
||||
assert(AID == TD.AID && "Target data annotation ID mismatch!");
|
||||
const Type *Ty = ((const Value *)T)->castTypeAsserting();
|
||||
assert(Ty->isStructType() &&
|
||||
"Can only create StructLayout annotation on structs!");
|
||||
return new StructLayout((const StructType *)Ty, TD);
|
||||
}
|
||||
|
||||
//===----------------------------------------------------------------------===//
|
||||
// TargetData Class Implementation
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
TargetData::TargetData(const string &TargetName, unsigned char PtrSize = 8,
|
||||
unsigned char PtrAl = 8, unsigned char DoubleAl = 8,
|
||||
unsigned char FloatAl = 4, unsigned char LongAl = 8,
|
||||
unsigned char IntAl = 4, unsigned char ShortAl = 2,
|
||||
unsigned char ByteAl = 1)
|
||||
: AID(AnnotationManager::getID("TargetData::" + TargetName)) {
|
||||
AnnotationManager::registerAnnotationFactory(AID, TypeAnFactory, this);
|
||||
|
||||
PointerSize = PtrSize;
|
||||
PointerAlignment = PtrAl;
|
||||
DoubleAlignment = DoubleAl;
|
||||
FloatAlignment = FloatAl;
|
||||
LongAlignment = LongAl;
|
||||
IntAlignment = IntAl;
|
||||
ShortAlignment = ShortAl;
|
||||
ByteAlignment = ByteAl;
|
||||
}
|
||||
|
||||
TargetData::~TargetData() {
|
||||
AnnotationManager::registerAnnotationFactory(AID, 0); // Deregister factory
|
||||
}
|
||||
|
||||
static inline void getTypeInfo(const Type *Ty, const TargetData *TD,
|
||||
unsigned &Size, unsigned char &Alignment) {
|
||||
switch (Ty->getPrimitiveID()) {
|
||||
case Type::VoidTyID:
|
||||
case Type::BoolTyID:
|
||||
case Type::UByteTyID:
|
||||
case Type::SByteTyID: Size = 1; Alignment = TD->getByteAlignment(); return;
|
||||
case Type::UShortTyID:
|
||||
case Type::ShortTyID: Size = 2; Alignment = TD->getShortAlignment(); return;
|
||||
case Type::UIntTyID:
|
||||
case Type::IntTyID: Size = 4; Alignment = TD->getIntAlignment(); return;
|
||||
case Type::ULongTyID:
|
||||
case Type::LongTyID: Size = 8; Alignment = TD->getLongAlignment(); return;
|
||||
case Type::FloatTyID: Size = 4; Alignment = TD->getFloatAlignment(); return;
|
||||
case Type::DoubleTyID: Size = 8; Alignment = TD->getDoubleAlignment(); return;
|
||||
case Type::LabelTyID:
|
||||
case Type::PointerTyID:
|
||||
Size = TD->getPointerSize(); Alignment = TD->getPointerAlignment();
|
||||
return;
|
||||
case Type::ArrayTyID: {
|
||||
const ArrayType *ATy = (const ArrayType *)Ty;
|
||||
assert(ATy->isSized() && "Can't get TypeInfo of an unsized array!");
|
||||
getTypeInfo(ATy->getElementType(), TD, Size, Alignment);
|
||||
Size *= ATy->getNumElements();
|
||||
return;
|
||||
}
|
||||
case Type::StructTyID: {
|
||||
// Get the layout annotation... which is lazily created on demand.
|
||||
const StructLayout *Layout = TD->getStructLayout((const StructType*)Ty);
|
||||
Size = Layout->StructSize; Alignment = Layout->StructAlignment;
|
||||
return;
|
||||
}
|
||||
|
||||
case Type::TypeTyID:
|
||||
default:
|
||||
assert(0 && "Bad type for getTypeInfo!!!");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
unsigned TargetData::getTypeSize(const Type *Ty) const {
|
||||
unsigned Size; unsigned char Align;
|
||||
getTypeInfo(Ty, this, Size, Align);
|
||||
return Size;
|
||||
}
|
||||
|
||||
unsigned char TargetData::getTypeAlignment(const Type *Ty) const {
|
||||
unsigned Size; unsigned char Align;
|
||||
getTypeInfo(Ty, this, Size, Align);
|
||||
return Align;
|
||||
}
|
||||
|
||||
unsigned TargetData::getIndexedOffset(const Type *ptrTy,
|
||||
const vector<ConstPoolVal*> &Idx) const {
|
||||
const PointerType *PtrTy = PtrTy->isPointerType(); // Returns null if not
|
||||
assert(PtrTy && "getIndexedOffset on nonpointer!");
|
||||
|
||||
unsigned Result = 0;
|
||||
|
||||
// Get the type pointed to...
|
||||
const Type *Ty = PtrTy->getValueType();
|
||||
|
||||
for (unsigned CurIDX = 0; CurIDX < Idx.size(); ++CurIDX) {
|
||||
if (const StructType *STy = Ty->isStructType()) {
|
||||
assert(Idx[CurIDX]->getType() == Type::UByteTy && "Illegal struct idx");
|
||||
unsigned FieldNo = ((ConstPoolUInt*)Idx[CurIDX++])->getValue();
|
||||
|
||||
// Get structure layout information...
|
||||
const StructLayout *Layout = getStructLayout(STy);
|
||||
|
||||
// Add in the offset, as calculated by the structure layout info...
|
||||
assert(FieldNo < Layout->MemberOffsets.size() && "FieldNo out of range!");
|
||||
Result += Layout->MemberOffsets[FieldNo];
|
||||
|
||||
// Update Ty to refer to current element
|
||||
Ty = STy->getElementTypes()[FieldNo];
|
||||
|
||||
} else if (const ArrayType *ATy = Ty->isArrayType()) {
|
||||
assert(0 && "Loading from arrays not implemented yet!");
|
||||
} else {
|
||||
assert(0 && "Indexing type that is not struct or array?");
|
||||
return 0; // Load directly through ptr
|
||||
}
|
||||
}
|
||||
|
||||
return Result;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user