X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineMemOperand.h;h=eb5086cbe5a5f5fe5f3210bb1b47148029f2efa2;hb=4c2a2ac1965714a3201c26868984c9364df9eb51;hp=de238e48d10a84000e6917ce18f625f21c7e473b;hpb=c43fd5a68ff77c1d996b520dc494336a9d3beaa0;p=oota-llvm.git diff --git a/include/llvm/CodeGen/MachineMemOperand.h b/include/llvm/CodeGen/MachineMemOperand.h index de238e48d10..eb5086cbe5a 100644 --- a/include/llvm/CodeGen/MachineMemOperand.h +++ b/include/llvm/CodeGen/MachineMemOperand.h @@ -16,10 +16,69 @@ #ifndef LLVM_CODEGEN_MACHINEMEMOPERAND_H #define LLVM_CODEGEN_MACHINEMEMOPERAND_H +#include "llvm/ADT/PointerUnion.h" +#include "llvm/CodeGen/PseudoSourceValue.h" +#include "llvm/IR/Metadata.h" +#include "llvm/IR/Value.h" // PointerLikeTypeTraits +#include "llvm/Support/DataTypes.h" + namespace llvm { -class Value; class FoldingSetNodeID; +class MDNode; +class raw_ostream; + +/// MachinePointerInfo - This class contains a discriminated union of +/// information about pointers in memory operands, relating them back to LLVM IR +/// or to virtual locations (such as frame indices) that are exposed during +/// codegen. +struct MachinePointerInfo { + /// V - This is the IR pointer value for the access, or it is null if unknown. + /// If this is null, then the access is to a pointer in the default address + /// space. + PointerUnion V; + + /// Offset - This is an offset from the base Value*. + int64_t Offset; + + explicit MachinePointerInfo(const Value *v = nullptr, int64_t offset = 0) + : V(v), Offset(offset) {} + + explicit MachinePointerInfo(const PseudoSourceValue *v, + int64_t offset = 0) + : V(v), Offset(offset) {} + + MachinePointerInfo getWithOffset(int64_t O) const { + if (V.isNull()) return MachinePointerInfo(); + if (V.is()) + return MachinePointerInfo(V.get(), Offset+O); + return MachinePointerInfo(V.get(), Offset+O); + } + + /// getAddrSpace - Return the LLVM IR address space number that this pointer + /// points into. + unsigned getAddrSpace() const; + + /// getConstantPool - Return a MachinePointerInfo record that refers to the + /// constant pool. + static MachinePointerInfo getConstantPool(); + + /// getFixedStack - Return a MachinePointerInfo record that refers to the + /// the specified FrameIndex. + static MachinePointerInfo getFixedStack(int FI, int64_t offset = 0); + + /// getJumpTable - Return a MachinePointerInfo record that refers to a + /// jump table entry. + static MachinePointerInfo getJumpTable(); + + /// getGOT - Return a MachinePointerInfo record that refers to a + /// GOT entry. + static MachinePointerInfo getGOT(); + + /// getStack - stack pointer relative access. + static MachinePointerInfo getStack(int64_t Offset); +}; + //===----------------------------------------------------------------------===// /// MachineMemOperand - A description of a memory reference used in the backend. @@ -30,10 +89,11 @@ class FoldingSetNodeID; /// that aren't explicit in the regular LLVM IR. /// class MachineMemOperand { - int64_t Offset; + MachinePointerInfo PtrInfo; uint64_t Size; - const Value *V; - unsigned int Flags; + unsigned Flags; + AAMDNodes AAInfo; + const MDNode *Ranges; public: /// Flags values. These may be or'd together. @@ -43,13 +103,26 @@ public: /// The memory access writes data. MOStore = 2, /// The memory access is volatile. - MOVolatile = 4 + MOVolatile = 4, + /// The memory access is non-temporal. + MONonTemporal = 8, + /// The memory access is invariant. + MOInvariant = 16, + // Target hints allow target passes to annotate memory operations. + MOTargetStartBit = 5, + MOTargetNumBits = 3, + // This is the number of bits we need to represent flags. + MOMaxBits = 8 }; /// MachineMemOperand - Construct an MachineMemOperand object with the - /// specified address Value, flags, offset, size, and alignment. - MachineMemOperand(const Value *v, unsigned int f, int64_t o, uint64_t s, - unsigned int a); + /// specified PtrInfo, flags, size, and base alignment. + MachineMemOperand(MachinePointerInfo PtrInfo, unsigned flags, uint64_t s, + unsigned base_alignment, + const AAMDNodes &AAInfo = AAMDNodes(), + const MDNode *Ranges = nullptr); + + const MachinePointerInfo &getPointerInfo() const { return PtrInfo; } /// getValue - Return the base address of the memory access. This may either /// be a normal LLVM IR Value, or one of the special values used in CodeGen. @@ -58,32 +131,78 @@ public: /// other PseudoSourceValue member functions which return objects which stand /// for frame/stack pointer relative references and other special references /// which are not representable in the high-level IR. - const Value *getValue() const { return V; } + const Value *getValue() const { return PtrInfo.V.dyn_cast(); } + + const PseudoSourceValue *getPseudoValue() const { + return PtrInfo.V.dyn_cast(); + } + + const void *getOpaqueValue() const { return PtrInfo.V.getOpaqueValue(); } /// getFlags - Return the raw flags of the source value, \see MemOperandFlags. - unsigned int getFlags() const { return Flags & 7; } + unsigned int getFlags() const { return Flags & ((1 << MOMaxBits) - 1); } + + /// Bitwise OR the current flags with the given flags. + void setFlags(unsigned f) { Flags |= (f & ((1 << MOMaxBits) - 1)); } /// getOffset - For normal values, this is a byte offset added to the base /// address. For PseudoSourceValue::FPRel values, this is the FrameIndex /// number. - int64_t getOffset() const { return Offset; } + int64_t getOffset() const { return PtrInfo.Offset; } + + unsigned getAddrSpace() const { return PtrInfo.getAddrSpace(); } /// getSize - Return the size in bytes of the memory reference. uint64_t getSize() const { return Size; } /// getAlignment - Return the minimum known alignment in bytes of the - /// memory reference. - unsigned int getAlignment() const { return (1u << (Flags >> 3)) >> 1; } + /// actual memory reference. + uint64_t getAlignment() const; + + /// getBaseAlignment - Return the minimum known alignment in bytes of the + /// base address, without the offset. + uint64_t getBaseAlignment() const { return (1u << (Flags >> MOMaxBits)) >> 1; } + + /// getAAInfo - Return the AA tags for the memory reference. + AAMDNodes getAAInfo() const { return AAInfo; } + + /// getRanges - Return the range tag for the memory reference. + const MDNode *getRanges() const { return Ranges; } bool isLoad() const { return Flags & MOLoad; } bool isStore() const { return Flags & MOStore; } bool isVolatile() const { return Flags & MOVolatile; } + bool isNonTemporal() const { return Flags & MONonTemporal; } + bool isInvariant() const { return Flags & MOInvariant; } + + /// isUnordered - Returns true if this memory operation doesn't have any + /// ordering constraints other than normal aliasing. Volatile and atomic + /// memory operations can't be reordered. + /// + /// Currently, we don't model the difference between volatile and atomic + /// operations. They should retain their ordering relative to all memory + /// operations. + bool isUnordered() const { return !isVolatile(); } + + /// refineAlignment - Update this MachineMemOperand to reflect the alignment + /// of MMO, if it has a greater alignment. This must only be used when the + /// new alignment applies to all users of this MachineMemOperand. + void refineAlignment(const MachineMemOperand *MMO); + + /// setValue - Change the SourceValue for this MachineMemOperand. This + /// should only be used when an object is being relocated and all references + /// to it are being updated. + void setValue(const Value *NewSV) { PtrInfo.V = NewSV; } + void setValue(const PseudoSourceValue *NewSV) { PtrInfo.V = NewSV; } + void setOffset(int64_t NewOffset) { PtrInfo.Offset = NewOffset; } /// Profile - Gather unique data for the object. /// void Profile(FoldingSetNodeID &ID) const; }; +raw_ostream &operator<<(raw_ostream &OS, const MachineMemOperand &MRO); + } // End llvm namespace #endif