#include "llvm/Pass.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
/// Layout alignment element.
///
-/// Stores the alignment data associated with a given alignment type (pointer,
-/// integer, vector, float) and type bit width.
+/// Stores the alignment data associated with a given alignment type (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.
bool operator==(const LayoutAlignElem &rhs) const;
};
+/// Layout pointer alignment element.
+///
+/// Stores the alignment data associated with a given pointer and address space.
+///
+/// @note The unusual order of elements in the structure attempts to reduce
+/// padding and make the structure slightly more cache friendly.
+struct PointerAlignElem {
+ unsigned ABIAlign; ///< ABI alignment for this type/bitw
+ unsigned PrefAlign; ///< Pref. alignment for this type/bitw
+ uint32_t TypeBitWidth; ///< Type bit width
+ uint32_t AddressSpace; ///< Address space for the pointer type
+
+ /// Initializer
+ static PointerAlignElem get(uint32_t addr_space, unsigned abi_align,
+ unsigned pref_align, uint32_t bit_width);
+ /// Equality predicate
+ bool operator==(const PointerAlignElem &rhs) const;
+};
+
+
/// 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
class DataLayout : public ImmutablePass {
private:
bool LittleEndian; ///< Defaults to false
- unsigned PointerMemSize; ///< Pointer size in bytes
- unsigned PointerABIAlign; ///< Pointer ABI alignment
- unsigned PointerPrefAlign; ///< Pointer preferred alignment
unsigned StackNaturalAlign; ///< Stack natural alignment
SmallVector<unsigned char, 8> LegalIntWidths; ///< Legal Integers.
/// pointers vs. 64-bit pointers by extending LayoutAlignment, but for now,
/// we don't.
SmallVector<LayoutAlignElem, 16> Alignments;
+ DenseMap<unsigned, PointerAlignElem> Pointers;
/// InvalidAlignmentElem - This member is a signal that a requested alignment
/// type and bit width were not found in the SmallVector.
static const LayoutAlignElem InvalidAlignmentElem;
+ /// InvalidPointerElem - This member is a signal that a requested pointer
+ /// type and bit width were not found in the DenseSet.
+ static const PointerAlignElem InvalidPointerElem;
+
// The StructType -> StructLayout map.
mutable void *LayoutMap;
unsigned pref_align, uint32_t bit_width);
unsigned getAlignmentInfo(AlignTypeEnum align_type, uint32_t bit_width,
bool ABIAlign, Type *Ty) const;
+
+ //! Set/initialize pointer alignments
+ void setPointerAlignment(uint32_t addr_space, unsigned abi_align,
+ unsigned pref_align, uint32_t bit_width);
+
//! Internal helper method that returns requested alignment for type.
unsigned getAlignment(Type *Ty, bool abi_or_pref) const;
return &align != &InvalidAlignmentElem;
}
+ /// Valid pointer predicate.
+ ///
+ /// Predicate that tests a PointerAlignElem reference returned by get() against
+ /// InvalidPointerElem.
+ bool validPointer(const PointerAlignElem &align) const {
+ return &align != &InvalidPointerElem;
+ }
+
/// Initialise a DataLayout object with default values, ensure that the
/// target data pass is registered.
void init();
DataLayout(const DataLayout &TD) :
ImmutablePass(ID),
LittleEndian(TD.isLittleEndian()),
- PointerMemSize(TD.PointerMemSize),
- PointerABIAlign(TD.PointerABIAlign),
- PointerPrefAlign(TD.PointerPrefAlign),
LegalIntWidths(TD.LegalIntWidths),
Alignments(TD.Alignments),
+ Pointers(TD.Pointers),
LayoutMap(0)
{ }
}
/// Layout pointer alignment
- unsigned getPointerABIAlignment() const { return PointerABIAlign; }
- /// Return layout's alignment for stack-based pointers
- unsigned getPointerPrefAlignment() const { return PointerPrefAlign; }
+ /// FIXME: The defaults need to be removed once all of
+ /// the backends/clients are updated.
+ unsigned getPointerABIAlignment(unsigned AS = 0) const {
+ DenseMap<unsigned, PointerAlignElem>::const_iterator val = Pointers.find(AS);
+ if (val == Pointers.end()) {
+ val = Pointers.find(0);
+ }
+ return val->second.ABIAlign;
+ }
+ /// Return target's alignment for stack-based pointers
+ /// FIXME: The defaults need to be removed once all of
+ /// the backends/clients are updated.
+ unsigned getPointerPrefAlignment(unsigned AS = 0) const {
+ DenseMap<unsigned, PointerAlignElem>::const_iterator val = Pointers.find(AS);
+ if (val == Pointers.end()) {
+ val = Pointers.find(0);
+ }
+ return val->second.PrefAlign;
+ }
/// Layout pointer size
- unsigned getPointerSize() const { return PointerMemSize; }
+ /// FIXME: The defaults need to be removed once all of
+ /// the backends/clients are updated.
+ unsigned getPointerSize(unsigned AS = 0) const {
+ DenseMap<unsigned, PointerAlignElem>::const_iterator val = Pointers.find(AS);
+ if (val == Pointers.end()) {
+ val = Pointers.find(0);
+ }
+ return val->second.TypeBitWidth;
+ }
/// Layout pointer size, in bits
- unsigned getPointerSizeInBits() const { return 8*PointerMemSize; }
-
+ /// FIXME: The defaults need to be removed once all of
+ /// the backends/clients are updated.
+ unsigned getPointerSizeInBits(unsigned AS = 0) const {
+ DenseMap<unsigned, PointerAlignElem>::const_iterator val = Pointers.find(AS);
+ if (val == Pointers.end()) {
+ val = Pointers.find(0);
+ }
+ return 8*val->second.TypeBitWidth;
+ }
/// Size examples:
///
/// Type SizeInBits StoreSizeInBits AllocSizeInBits[*]
/// getIntPtrType - Return an unsigned integer type that is the same size or
/// greater to the host pointer size.
- ///
- IntegerType *getIntPtrType(LLVMContext &C) const;
+ /// FIXME: Need to remove the default argument when the rest of the LLVM code
+ /// base has been updated.
+ IntegerType *getIntPtrType(LLVMContext &C, unsigned AddressSpace = 0) const;
/// getIndexedOffset - return the offset from the beginning of the type for
/// the specified indices. This is used to implement getelementptr.
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