#define LLVM_CODEGEN_MACHINECONSTANTPOOL_H
#include "llvm/ADT/DenseSet.h"
+#include "llvm/MC/SectionKind.h"
#include <cassert>
#include <climits>
#include <vector>
class Constant;
class FoldingSetNodeID;
-class TargetData;
+class DataLayout;
class TargetMachine;
class Type;
class MachineConstantPool;
/// Abstract base class for all machine specific constantpool value subclasses.
///
class MachineConstantPoolValue {
- const Type *Ty;
+ virtual void anchor();
+ Type *Ty;
public:
- explicit MachineConstantPoolValue(const Type *ty) : Ty(ty) {}
+ explicit MachineConstantPoolValue(Type *ty) : Ty(ty) {}
virtual ~MachineConstantPoolValue() {}
/// getType - get type of this MachineConstantPoolValue.
///
- const Type *getType() const { return Ty; }
-
-
- /// getRelocationInfo - This method classifies the entry according to
- /// whether or not it may generate a relocation entry. This must be
- /// conservative, so if it might codegen to a relocatable entry, it should say
- /// so. The return values are the same as Constant::getRelocationInfo().
- virtual unsigned getRelocationInfo() const = 0;
-
+ Type *getType() const { return Ty; }
+
virtual int getExistingMachineCPValue(MachineConstantPool *CP,
unsigned Alignment) = 0;
- virtual void AddSelectionDAGCSEId(FoldingSetNodeID &ID) = 0;
+ virtual void addSelectionDAGCSEId(FoldingSetNodeID &ID) = 0;
/// print - Implement operator<<
virtual void print(raw_ostream &O) const = 0;
V.print(OS);
return OS;
}
-
/// This class is a data container for one entry in a MachineConstantPool.
/// It contains a pointer to the value and an offset from the start of
} Val;
/// The required alignment for this entry. The top bit is set when Val is
- /// a MachineConstantPoolValue.
+ /// a target specific MachineConstantPoolValue.
unsigned Alignment;
MachineConstantPoolEntry(const Constant *V, unsigned A)
Val.ConstVal = V;
}
MachineConstantPoolEntry(MachineConstantPoolValue *V, unsigned A)
- : Alignment(A) {
- Val.MachineCPVal = V;
- Alignment |= 1U << (sizeof(unsigned)*CHAR_BIT-1);
+ : Alignment(A) {
+ Val.MachineCPVal = V;
+ Alignment |= 1U << (sizeof(unsigned) * CHAR_BIT - 1);
}
+ /// isMachineConstantPoolEntry - Return true if the MachineConstantPoolEntry
+ /// is indeed a target specific constantpool entry, not a wrapper over a
+ /// Constant.
bool isMachineConstantPoolEntry() const {
return (int)Alignment < 0;
}
- int getAlignment() const {
- return Alignment & ~(1 << (sizeof(unsigned)*CHAR_BIT-1));
+ int getAlignment() const {
+ return Alignment & ~(1 << (sizeof(unsigned) * CHAR_BIT - 1));
}
- const Type *getType() const;
-
- /// getRelocationInfo - This method classifies the entry according to
- /// whether or not it may generate a relocation entry. This must be
- /// conservative, so if it might codegen to a relocatable entry, it should say
- /// so. The return values are:
- ///
- /// 0: This constant pool entry is guaranteed to never have a relocation
- /// applied to it (because it holds a simple constant like '4').
- /// 1: This entry has relocations, but the entries are guaranteed to be
- /// resolvable by the static linker, so the dynamic linker will never see
- /// them.
- /// 2: This entry may have arbitrary relocations.
- unsigned getRelocationInfo() const;
+ Type *getType() const;
+
+ /// This method classifies the entry according to whether or not it may
+ /// generate a relocation entry. This must be conservative, so if it might
+ /// codegen to a relocatable entry, it should say so.
+ bool needsRelocation() const;
+
+ SectionKind getSectionKind(const DataLayout *DL) const;
};
-
+
/// The MachineConstantPool class keeps track of constants referenced by a
/// function which must be spilled to memory. This is used for constants which
/// are unable to be used directly as operands to instructions, which typically
/// address of the function constant pool values.
/// @brief The machine constant pool.
class MachineConstantPool {
- const TargetData *TD; ///< The machine's TargetData.
- unsigned PoolAlignment; ///< The alignment for the pool.
+ unsigned PoolAlignment; ///< The alignment for the pool.
std::vector<MachineConstantPoolEntry> Constants; ///< The pool of constants.
/// MachineConstantPoolValues that use an existing MachineConstantPoolEntry.
DenseSet<MachineConstantPoolValue*> MachineCPVsSharingEntries;
+ const DataLayout &DL;
+
+ const DataLayout &getDataLayout() const { return DL; }
+
public:
/// @brief The only constructor.
- explicit MachineConstantPool(const TargetData *td)
- : TD(td), PoolAlignment(1) {}
+ explicit MachineConstantPool(const DataLayout &DL)
+ : PoolAlignment(1), DL(DL) {}
~MachineConstantPool();
-
+
/// getConstantPoolAlignment - Return the alignment required by
/// the whole constant pool, of which the first element must be aligned.
unsigned getConstantPoolAlignment() const { return PoolAlignment; }
-
+
/// getConstantPoolIndex - Create a new entry in the constant pool or return
/// an existing one. User must specify the minimum required alignment for
/// the object.
unsigned getConstantPoolIndex(const Constant *C, unsigned Alignment);
- unsigned getConstantPoolIndex(MachineConstantPoolValue *V,unsigned Alignment);
-
+ unsigned getConstantPoolIndex(MachineConstantPoolValue *V,
+ unsigned Alignment);
+
/// isEmpty - Return true if this constant pool contains no constants.
bool isEmpty() const { return Constants.empty(); }
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