-//===-- llvm/Target/TargetData.h - Data size & alignment info ---*- C++ -*-===//
+//===--------- llvm/DataLayout.h - Data size & alignment info ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file defines target properties related to datatype size/offset/alignment
+// This file defines layout properties related to datatype size/offset/alignment
// information. It uses lazy annotations to cache information about how
// structure types are laid out and used.
//
//
//===----------------------------------------------------------------------===//
-#ifndef LLVM_TARGET_TARGETDATA_H
-#define LLVM_TARGET_TARGETDATA_H
+#ifndef LLVM_DATALAYOUT_H
+#define LLVM_DATALAYOUT_H
#include "llvm/Pass.h"
#include "llvm/ADT/SmallVector.h"
template<typename T>
class ArrayRef;
-/// Enum used to categorize the alignment types stored by TargetAlignElem
+/// Enum used to categorize the alignment types stored by LayoutAlignElem
enum AlignTypeEnum {
INTEGER_ALIGN = 'i', ///< Integer type alignment
VECTOR_ALIGN = 'v', ///< Vector type alignment
STACK_ALIGN = 's' ///< Stack objects alignment
};
-/// Target alignment element.
+/// Layout alignment element.
///
/// Stores the alignment data associated with a given alignment type (pointer,
/// integer, vector, float) and type bit width.
///
/// @note The unusual order of elements in the structure attempts to reduce
/// padding and make the structure slightly more cache friendly.
-struct TargetAlignElem {
+struct LayoutAlignElem {
unsigned AlignType : 8; ///< Alignment type (AlignTypeEnum)
unsigned TypeBitWidth : 24; ///< Type bit width
unsigned ABIAlign : 16; ///< ABI alignment for this type/bitw
unsigned PrefAlign : 16; ///< Pref. alignment for this type/bitw
/// Initializer
- static TargetAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
+ static LayoutAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
unsigned pref_align, uint32_t bit_width);
/// Equality predicate
- bool operator==(const TargetAlignElem &rhs) const;
+ bool operator==(const LayoutAlignElem &rhs) const;
};
-/// TargetData - This class holds a parsed version of the target data layout
+/// DataLayout - This class holds a parsed version of the target data layout
/// string in a module and provides methods for querying it. The target data
/// layout string is specified *by the target* - a frontend generating LLVM IR
/// is required to generate the right target data for the target being codegen'd
/// to. If some measure of portability is desired, an empty string may be
/// specified in the module.
-class TargetData : public ImmutablePass {
+class DataLayout : public ImmutablePass {
private:
bool LittleEndian; ///< Defaults to false
unsigned PointerMemSize; ///< Pointer size in bytes
///
/// @sa init().
/// @note Could support multiple size pointer alignments, e.g., 32-bit
- /// pointers vs. 64-bit pointers by extending TargetAlignment, but for now,
+ /// pointers vs. 64-bit pointers by extending LayoutAlignment, but for now,
/// we don't.
- SmallVector<TargetAlignElem, 16> Alignments;
+ SmallVector<LayoutAlignElem, 16> Alignments;
/// InvalidAlignmentElem - This member is a signal that a requested alignment
/// type and bit width were not found in the SmallVector.
- static const TargetAlignElem InvalidAlignmentElem;
+ static const LayoutAlignElem InvalidAlignmentElem;
// The StructType -> StructLayout map.
mutable void *LayoutMap;
/// Valid alignment predicate.
///
- /// Predicate that tests a TargetAlignElem reference returned by get() against
+ /// Predicate that tests a LayoutAlignElem reference returned by get() against
/// InvalidAlignmentElem.
- bool validAlignment(const TargetAlignElem &align) const {
+ bool validAlignment(const LayoutAlignElem &align) const {
return &align != &InvalidAlignmentElem;
}
- /// Initialise a TargetData object with default values, ensure that the
+ /// Initialise a DataLayout object with default values, ensure that the
/// target data pass is registered.
void init();
///
/// @note This has to exist, because this is a pass, but it should never be
/// used.
- TargetData();
+ DataLayout();
- /// Constructs a TargetData from a specification string. See init().
- explicit TargetData(StringRef TargetDescription)
+ /// Constructs a DataLayout from a specification string. See init().
+ explicit DataLayout(StringRef LayoutDescription)
: ImmutablePass(ID) {
- std::string errMsg = parseSpecifier(TargetDescription, this);
+ std::string errMsg = parseSpecifier(LayoutDescription, this);
assert(errMsg == "" && "Invalid target data layout string.");
(void)errMsg;
}
/// Parses a target data specification string. Returns an error message
/// if the string is malformed, or the empty string on success. Optionally
- /// initialises a TargetData object if passed a non-null pointer.
- static std::string parseSpecifier(StringRef TargetDescription, TargetData* td = 0);
+ /// initialises a DataLayout object if passed a non-null pointer.
+ static std::string parseSpecifier(StringRef LayoutDescription,
+ DataLayout* td = 0);
/// Initialize target data from properties stored in the module.
- explicit TargetData(const Module *M);
+ explicit DataLayout(const Module *M);
- TargetData(const TargetData &TD) :
+ DataLayout(const DataLayout &TD) :
ImmutablePass(ID),
LittleEndian(TD.isLittleEndian()),
PointerMemSize(TD.PointerMemSize),
LayoutMap(0)
{ }
- ~TargetData(); // Not virtual, do not subclass this class
+ ~DataLayout(); // Not virtual, do not subclass this class
- /// Target endianness...
+ /// Layout endianness...
bool isLittleEndian() const { return LittleEndian; }
bool isBigEndian() const { return !LittleEndian; }
/// getStringRepresentation - Return the string representation of the
- /// TargetData. This representation is in the same format accepted by the
+ /// DataLayout. This representation is in the same format accepted by the
/// string constructor above.
std::string getStringRepresentation() const;
return false;
}
- /// Target pointer alignment
+ /// Layout pointer alignment
unsigned getPointerABIAlignment() const { return PointerABIAlign; }
- /// Return target's alignment for stack-based pointers
+ /// Return layout's alignment for stack-based pointers
unsigned getPointerPrefAlignment() const { return PointerPrefAlign; }
- /// Target pointer size
+ /// Layout pointer size
unsigned getPointerSize() const { return PointerMemSize; }
- /// Target pointer size, in bits
+ /// Layout pointer size, in bits
unsigned getPointerSizeInBits() const { return 8*PointerMemSize; }
/// Size examples:
};
/// StructLayout - used to lazily calculate structure layout information for a
-/// target machine, based on the TargetData structure.
+/// target machine, based on the DataLayout structure.
///
class StructLayout {
uint64_t StructSize;
}
private:
- friend class TargetData; // Only TargetData can create this class
- StructLayout(StructType *ST, const TargetData &TD);
+ friend class DataLayout; // Only DataLayout can create this class
+ StructLayout(StructType *ST, const DataLayout &TD);
};
} // End llvm namespace
-//===-- TargetData.cpp - Data size & alignment routines --------------------==//
+//===-- DataLayout.cpp - Data size & alignment routines --------------------==//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file defines target properties related to datatype size/offset/alignment
+// This file defines layout properties related to datatype size/offset/alignment
// information.
//
// This structure should be created once, filled in if the defaults are not
//
//===----------------------------------------------------------------------===//
-#include "llvm/Target/TargetData.h"
+#include "llvm/DataLayout.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include <cstdlib>
using namespace llvm;
-// Handle the Pass registration stuff necessary to use TargetData's.
+// Handle the Pass registration stuff necessary to use DataLayout's.
// Register the default SparcV9 implementation...
-INITIALIZE_PASS(TargetData, "targetdata", "Target Data Layout", false, true)
-char TargetData::ID = 0;
+INITIALIZE_PASS(DataLayout, "datalayout", "Data Layout", false, true)
+char DataLayout::ID = 0;
//===----------------------------------------------------------------------===//
// Support for StructLayout
//===----------------------------------------------------------------------===//
-StructLayout::StructLayout(StructType *ST, const TargetData &TD) {
+StructLayout::StructLayout(StructType *ST, const DataLayout &TD) {
assert(!ST->isOpaque() && "Cannot get layout of opaque structs");
StructAlignment = 0;
StructSize = 0;
// Add padding if necessary to align the data element properly.
if ((StructSize & (TyAlign-1)) != 0)
- StructSize = TargetData::RoundUpAlignment(StructSize, TyAlign);
+ StructSize = DataLayout::RoundUpAlignment(StructSize, TyAlign);
// Keep track of maximum alignment constraint.
StructAlignment = std::max(TyAlign, StructAlignment);
// 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-1)) != 0)
- StructSize = TargetData::RoundUpAlignment(StructSize, StructAlignment);
+ StructSize = DataLayout::RoundUpAlignment(StructSize, StructAlignment);
}
}
//===----------------------------------------------------------------------===//
-// TargetAlignElem, TargetAlign support
+// LayoutAlignElem, LayoutAlign support
//===----------------------------------------------------------------------===//
-TargetAlignElem
-TargetAlignElem::get(AlignTypeEnum align_type, unsigned abi_align,
+LayoutAlignElem
+LayoutAlignElem::get(AlignTypeEnum align_type, unsigned abi_align,
unsigned pref_align, uint32_t bit_width) {
assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
- TargetAlignElem retval;
+ LayoutAlignElem retval;
retval.AlignType = align_type;
retval.ABIAlign = abi_align;
retval.PrefAlign = pref_align;
}
bool
-TargetAlignElem::operator==(const TargetAlignElem &rhs) const {
+LayoutAlignElem::operator==(const LayoutAlignElem &rhs) const {
return (AlignType == rhs.AlignType
&& ABIAlign == rhs.ABIAlign
&& PrefAlign == rhs.PrefAlign
&& TypeBitWidth == rhs.TypeBitWidth);
}
-const TargetAlignElem
-TargetData::InvalidAlignmentElem = { (AlignTypeEnum)0xFF, 0, 0, 0 };
+const LayoutAlignElem
+DataLayout::InvalidAlignmentElem = { (AlignTypeEnum)0xFF, 0, 0, 0 };
//===----------------------------------------------------------------------===//
-// TargetData Class Implementation
+// DataLayout Class Implementation
//===----------------------------------------------------------------------===//
/// getInt - Get an integer ignoring errors.
return Result;
}
-void TargetData::init() {
- initializeTargetDataPass(*PassRegistry::getPassRegistry());
+void DataLayout::init() {
+ initializeDataLayoutPass(*PassRegistry::getPassRegistry());
LayoutMap = 0;
LittleEndian = false;
setAlignment(AGGREGATE_ALIGN, 0, 8, 0); // struct
}
-std::string TargetData::parseSpecifier(StringRef Desc, TargetData *td) {
+std::string DataLayout::parseSpecifier(StringRef Desc, DataLayout *td) {
if (td)
td->init();
unsigned PrefAlign = PrefAlignBits / 8;
if (PrefAlign == 0)
PrefAlign = ABIAlign;
-
+
if (td)
td->setAlignment(AlignType, ABIAlign, PrefAlign, Size);
break;
do {
int Width = getInt(Specifier);
if (Width <= 0) {
- return std::string("invalid native integer size \'") + Specifier.str() +
- "\', must be a positive integer.";
+ return std::string("invalid native integer size \'") +
+ Specifier.str() + "\', must be a positive integer.";
}
if (td && Width != 0)
td->LegalIntWidths.push_back(Width);
///
/// @note This has to exist, because this is a pass, but it should never be
/// used.
-TargetData::TargetData() : ImmutablePass(ID) {
- report_fatal_error("Bad TargetData ctor used. "
- "Tool did not specify a TargetData to use?");
+DataLayout::DataLayout() : ImmutablePass(ID) {
+ report_fatal_error("Bad DataLayout ctor used. "
+ "Tool did not specify a DataLayout to use?");
}
-TargetData::TargetData(const Module *M)
+DataLayout::DataLayout(const Module *M)
: ImmutablePass(ID) {
std::string errMsg = parseSpecifier(M->getDataLayout(), this);
- assert(errMsg == "" && "Module M has malformed target data layout string.");
+ assert(errMsg == "" && "Module M has malformed data layout string.");
(void)errMsg;
}
void
-TargetData::setAlignment(AlignTypeEnum align_type, unsigned abi_align,
+DataLayout::setAlignment(AlignTypeEnum align_type, unsigned abi_align,
unsigned pref_align, uint32_t bit_width) {
assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
assert(pref_align < (1 << 16) && "Alignment doesn't fit in bitfield");
}
}
- Alignments.push_back(TargetAlignElem::get(align_type, abi_align,
+ Alignments.push_back(LayoutAlignElem::get(align_type, abi_align,
pref_align, bit_width));
}
/// getAlignmentInfo - Return the alignment (either ABI if ABIInfo = true or
-/// preferred if ABIInfo = false) the target wants for the specified datatype.
-unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType,
+/// preferred if ABIInfo = false) the layout wants for the specified datatype.
+unsigned DataLayout::getAlignmentInfo(AlignTypeEnum AlignType,
uint32_t BitWidth, bool ABIInfo,
Type *Ty) const {
// Check to see if we have an exact match and remember the best match we see.
} // end anonymous namespace
-TargetData::~TargetData() {
+DataLayout::~DataLayout() {
delete static_cast<StructLayoutMap*>(LayoutMap);
}
-const StructLayout *TargetData::getStructLayout(StructType *Ty) const {
+const StructLayout *DataLayout::getStructLayout(StructType *Ty) const {
if (!LayoutMap)
LayoutMap = new StructLayoutMap();
return L;
}
-std::string TargetData::getStringRepresentation() const {
+std::string DataLayout::getStringRepresentation() const {
std::string Result;
raw_string_ostream OS(Result);
<< "-S" << StackNaturalAlign*8;
for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
- const TargetAlignElem &AI = Alignments[i];
+ const LayoutAlignElem &AI = Alignments[i];
OS << '-' << (char)AI.AlignType << AI.TypeBitWidth << ':'
<< AI.ABIAlign*8 << ':' << AI.PrefAlign*8;
}
}
-uint64_t TargetData::getTypeSizeInBits(Type *Ty) const {
+uint64_t DataLayout::getTypeSizeInBits(Type *Ty) const {
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
switch (Ty->getTypeID()) {
case Type::LabelTyID:
case Type::VectorTyID:
return cast<VectorType>(Ty)->getBitWidth();
default:
- llvm_unreachable("TargetData::getTypeSizeInBits(): Unsupported type");
+ llvm_unreachable("DataLayout::getTypeSizeInBits(): Unsupported type");
}
}
Get the ABI (\a abi_or_pref == true) or preferred alignment (\a abi_or_pref
== false) for the requested type \a Ty.
*/
-unsigned TargetData::getAlignment(Type *Ty, bool abi_or_pref) const {
+unsigned DataLayout::getAlignment(Type *Ty, bool abi_or_pref) const {
int AlignType = -1;
assert(Ty->isSized() && "Cannot getTypeInfo() on a type that is unsized!");
abi_or_pref, Ty);
}
-unsigned TargetData::getABITypeAlignment(Type *Ty) const {
+unsigned DataLayout::getABITypeAlignment(Type *Ty) const {
return getAlignment(Ty, true);
}
/// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for
/// an integer type of the specified bitwidth.
-unsigned TargetData::getABIIntegerTypeAlignment(unsigned BitWidth) const {
+unsigned DataLayout::getABIIntegerTypeAlignment(unsigned BitWidth) const {
return getAlignmentInfo(INTEGER_ALIGN, BitWidth, true, 0);
}
-unsigned TargetData::getCallFrameTypeAlignment(Type *Ty) const {
+unsigned DataLayout::getCallFrameTypeAlignment(Type *Ty) const {
for (unsigned i = 0, e = Alignments.size(); i != e; ++i)
if (Alignments[i].AlignType == STACK_ALIGN)
return Alignments[i].ABIAlign;
return getABITypeAlignment(Ty);
}
-unsigned TargetData::getPrefTypeAlignment(Type *Ty) const {
+unsigned DataLayout::getPrefTypeAlignment(Type *Ty) const {
return getAlignment(Ty, false);
}
-unsigned TargetData::getPreferredTypeAlignmentShift(Type *Ty) const {
+unsigned DataLayout::getPreferredTypeAlignmentShift(Type *Ty) const {
unsigned Align = getPrefTypeAlignment(Ty);
assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
return Log2_32(Align);
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.
-IntegerType *TargetData::getIntPtrType(LLVMContext &C) const {
+IntegerType *DataLayout::getIntPtrType(LLVMContext &C) const {
return IntegerType::get(C, getPointerSizeInBits());
}
-uint64_t TargetData::getIndexedOffset(Type *ptrTy,
+uint64_t DataLayout::getIndexedOffset(Type *ptrTy,
ArrayRef<Value *> Indices) const {
Type *Ty = ptrTy;
assert(Ty->isPointerTy() && "Illegal argument for getIndexedOffset()");
/// getPreferredAlignment - Return the preferred alignment of the specified
/// global. This includes an explicitly requested alignment (if the global
/// has one).
-unsigned TargetData::getPreferredAlignment(const GlobalVariable *GV) const {
+unsigned DataLayout::getPreferredAlignment(const GlobalVariable *GV) const {
Type *ElemType = GV->getType()->getElementType();
unsigned Alignment = getPrefTypeAlignment(ElemType);
unsigned GVAlignment = GV->getAlignment();
/// getPreferredAlignmentLog - Return the preferred alignment of the
/// specified global, returned in log form. This includes an explicitly
/// requested alignment (if the global has one).
-unsigned TargetData::getPreferredAlignmentLog(const GlobalVariable *GV) const {
+unsigned DataLayout::getPreferredAlignmentLog(const GlobalVariable *GV) const {
return Log2_32(getPreferredAlignment(GV));
}
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