#define LLVM_TARGET_TARGETDATA_H
#include "llvm/Pass.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/Support/ErrorHandling.h"
#include "llvm/ADT/SmallVector.h"
-#include <string>
+#include "llvm/Support/DataTypes.h"
namespace llvm {
/// padding and make the structure slightly more cache friendly.
struct TargetAlignElem {
AlignTypeEnum AlignType : 8; //< Alignment type (AlignTypeEnum)
- unsigned char ABIAlign; //< ABI alignment for this type/bitw
- unsigned char PrefAlign; //< Pref. alignment for this type/bitw
+ unsigned ABIAlign; //< ABI alignment for this type/bitw
+ unsigned PrefAlign; //< Pref. alignment for this type/bitw
uint32_t TypeBitWidth; //< Type bit width
/// Initializer
- static TargetAlignElem get(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, uint32_t bit_width);
+ static TargetAlignElem get(AlignTypeEnum align_type, unsigned abi_align,
+ unsigned pref_align, uint32_t bit_width);
/// Equality predicate
bool operator==(const TargetAlignElem &rhs) const;
- /// output stream operator
- std::ostream &dump(std::ostream &os) const;
};
class TargetData : public ImmutablePass {
private:
bool LittleEndian; ///< Defaults to false
- unsigned char PointerMemSize; ///< Pointer size in bytes
- unsigned char PointerABIAlign; ///< Pointer ABI alignment
- unsigned char PointerPrefAlign; ///< Pointer preferred alignment
-
- //! Where the primitive type alignment data is stored.
- /*!
- @sa init().
- @note Could support multiple size pointer alignments, e.g., 32-bit pointers
- vs. 64-bit pointers by extending TargetAlignment, but for now, we don't.
- */
+ unsigned PointerMemSize; ///< Pointer size in bytes
+ unsigned PointerABIAlign; ///< Pointer ABI alignment
+ unsigned PointerPrefAlign; ///< Pointer preferred alignment
+
+ SmallVector<unsigned char, 8> LegalIntWidths; ///< Legal Integers.
+
+ /// Alignments- Where the primitive type alignment data is stored.
+ ///
+ /// @sa init().
+ /// @note Could support multiple size pointer alignments, e.g., 32-bit
+ /// pointers vs. 64-bit pointers by extending TargetAlignment, but for now,
+ /// we don't.
SmallVector<TargetAlignElem, 16> Alignments;
- //! Alignment iterator shorthand
- typedef SmallVector<TargetAlignElem, 16>::iterator align_iterator;
- //! Constant alignment iterator shorthand
- typedef SmallVector<TargetAlignElem, 16>::const_iterator align_const_iterator;
- //! Invalid alignment.
- /*!
- This member is a signal that a requested alignment type and bit width were
- not found in the SmallVector.
- */
+
+ /// InvalidAlignmentElem - This member is a signal that a requested alignment
+ /// type and bit width were not found in the SmallVector.
static const TargetAlignElem InvalidAlignmentElem;
+ // The StructType -> StructLayout map.
+ mutable void *LayoutMap;
+
//! Set/initialize target alignments
- void setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
- unsigned char pref_align, uint32_t bit_width);
+ void setAlignment(AlignTypeEnum align_type, unsigned abi_align,
+ unsigned pref_align, uint32_t bit_width);
unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width,
bool ABIAlign, const Type *Ty) const;
//! Internal helper method that returns requested alignment for type.
- unsigned char getAlignment(const Type *Ty, bool abi_or_pref) const;
+ unsigned getAlignment(const Type *Ty, bool abi_or_pref) const;
/// Valid alignment predicate.
///
/// Predicate that tests a TargetAlignElem reference returned by get() against
/// InvalidAlignmentElem.
- inline bool validAlignment(const TargetAlignElem &align) const {
- return (&align != &InvalidAlignmentElem);
+ bool validAlignment(const TargetAlignElem &align) const {
+ return &align != &InvalidAlignmentElem;
}
public:
///
/// @note This has to exist, because this is a pass, but it should never be
/// used.
- TargetData() : ImmutablePass(&ID) {
- llvm_report_error("Bad TargetData ctor used. "
- "Tool did not specify a TargetData to use?");
- }
-
+ TargetData();
+
/// Constructs a TargetData from a specification string. See init().
- explicit TargetData(const std::string &TargetDescription)
- : ImmutablePass(&ID) {
+ explicit TargetData(StringRef TargetDescription)
+ : ImmutablePass(ID) {
init(TargetDescription);
}
explicit TargetData(const Module *M);
TargetData(const TargetData &TD) :
- ImmutablePass(&ID),
+ ImmutablePass(ID),
LittleEndian(TD.isLittleEndian()),
PointerMemSize(TD.PointerMemSize),
PointerABIAlign(TD.PointerABIAlign),
PointerPrefAlign(TD.PointerPrefAlign),
- Alignments(TD.Alignments)
+ LegalIntWidths(TD.LegalIntWidths),
+ Alignments(TD.Alignments),
+ LayoutMap(0)
{ }
~TargetData(); // Not virtual, do not subclass this class
//! Parse a target data layout string and initialize TargetData alignments.
- void init(const std::string &TargetDescription);
+ void init(StringRef TargetDescription);
/// Target endianness...
- bool isLittleEndian() const { return LittleEndian; }
- bool isBigEndian() const { return !LittleEndian; }
+ 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
/// string constructor above.
std::string getStringRepresentation() const;
+
+ /// isLegalInteger - This function returns true if the specified type is
+ /// known tobe a native integer type supported by the CPU. For example,
+ /// i64 is not native on most 32-bit CPUs and i37 is not native on any known
+ /// one. This returns false if the integer width is not legal.
+ ///
+ /// The width is specified in bits.
+ ///
+ bool isLegalInteger(unsigned Width) const {
+ for (unsigned i = 0, e = (unsigned)LegalIntWidths.size(); i != e; ++i)
+ if (LegalIntWidths[i] == Width)
+ return true;
+ return false;
+ }
+
+ bool isIllegalInteger(unsigned Width) const {
+ return !isLegalInteger(Width);
+ }
+
/// Target pointer alignment
- unsigned char getPointerABIAlignment() const { return PointerABIAlign; }
+ unsigned getPointerABIAlignment() const { return PointerABIAlign; }
/// Return target's alignment for stack-based pointers
- unsigned char getPointerPrefAlignment() const { return PointerPrefAlign; }
+ unsigned getPointerPrefAlignment() const { return PointerPrefAlign; }
/// Target pointer size
- unsigned char getPointerSize() const { return PointerMemSize; }
+ unsigned getPointerSize() const { return PointerMemSize; }
/// Target pointer size, in bits
- unsigned char getPointerSizeInBits() const { return 8*PointerMemSize; }
+ unsigned getPointerSizeInBits() const { return 8*PointerMemSize; }
/// Size examples:
///
/// getABITypeAlignment - Return the minimum ABI-required alignment for the
/// specified type.
- unsigned char getABITypeAlignment(const Type *Ty) const;
+ unsigned getABITypeAlignment(const Type *Ty) const;
+
+ /// getABIIntegerTypeAlignment - Return the minimum ABI-required alignment for
+ /// an integer type of the specified bitwidth.
+ unsigned getABIIntegerTypeAlignment(unsigned BitWidth) const;
+
/// getCallFrameTypeAlignment - Return the minimum ABI-required alignment
/// for the specified type when it is part of a call frame.
- unsigned char getCallFrameTypeAlignment(const Type *Ty) const;
+ unsigned getCallFrameTypeAlignment(const Type *Ty) const;
/// getPrefTypeAlignment - Return the preferred stack/global alignment for
/// the specified type. This is always at least as good as the ABI alignment.
- unsigned char getPrefTypeAlignment(const Type *Ty) const;
+ unsigned getPrefTypeAlignment(const Type *Ty) const;
/// getPreferredTypeAlignmentShift - Return the preferred alignment for the
/// specified type, returned as log2 of the value (a shift amount).
///
- unsigned char getPreferredTypeAlignmentShift(const Type *Ty) const;
+ unsigned getPreferredTypeAlignmentShift(const Type *Ty) const;
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.