X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FJITCodeEmitter.h;h=dc2a0272db4e22919df23c4adfe06a4b0e4329b4;hb=7ad7c75048eb32f95eae04847908793e0183802f;hp=792fb5992336e86ad17838a38664c0d9dd9ade2e;hpb=8b67f774e9c38b7718b2b300b628388f966df4e0;p=oota-llvm.git diff --git a/include/llvm/CodeGen/JITCodeEmitter.h b/include/llvm/CodeGen/JITCodeEmitter.h index 792fb599233..dc2a0272db4 100644 --- a/include/llvm/CodeGen/JITCodeEmitter.h +++ b/include/llvm/CodeGen/JITCodeEmitter.h @@ -17,12 +17,11 @@ #ifndef LLVM_CODEGEN_JITCODEEMITTER_H #define LLVM_CODEGEN_JITCODEEMITTER_H -#include -#include "llvm/System/DataTypes.h" -#include "llvm/Support/MathExtras.h" +#include "llvm/ADT/DenseMap.h" #include "llvm/CodeGen/MachineCodeEmitter.h" - -using namespace std; +#include "llvm/Support/DataTypes.h" +#include "llvm/Support/MathExtras.h" +#include namespace llvm { @@ -35,9 +34,9 @@ class MachineRelocation; class Value; class GlobalValue; class Function; - + /// JITCodeEmitter - This class defines two sorts of methods: those for -/// emitting the actual bytes of machine code, and those for emitting auxillary +/// emitting the actual bytes of machine code, and those for emitting auxiliary /// structures, such as jump tables, relocations, etc. /// /// Emission of machine code is complicated by the fact that we don't (in @@ -52,6 +51,7 @@ class Function; /// occurred, more memory is allocated, and we reemit the code into it. /// class JITCodeEmitter : public MachineCodeEmitter { + void anchor() override; public: virtual ~JITCodeEmitter() {} @@ -59,32 +59,20 @@ public: /// about to be code generated. This initializes the BufferBegin/End/Ptr /// fields. /// - virtual void startFunction(MachineFunction &F) = 0; + void startFunction(MachineFunction &F) override = 0; /// finishFunction - This callback is invoked when the specified function has /// finished code generation. If a buffer overflow has occurred, this method /// returns true (the callee is required to try again), otherwise it returns /// false. /// - virtual bool finishFunction(MachineFunction &F) = 0; - - /// startGVStub - This callback is invoked when the JIT needs the - /// address of a GV (e.g. function) that has not been code generated yet. - /// The StubSize specifies the total size required by the stub. - /// - virtual void startGVStub(const GlobalValue* GV, unsigned StubSize, - unsigned Alignment = 1) = 0; + bool finishFunction(MachineFunction &F) override = 0; - /// startGVStub - This callback is invoked when the JIT needs the address of a - /// GV (e.g. function) that has not been code generated yet. Buffer points to - /// memory already allocated for this stub. - /// - virtual void startGVStub(const GlobalValue* GV, void *Buffer, - unsigned StubSize) = 0; - - /// finishGVStub - This callback is invoked to terminate a GV stub. - /// - virtual void *finishGVStub(const GlobalValue* F) = 0; + /// allocIndirectGV - Allocates and fills storage for an indirect + /// GlobalValue, and returns the address. + virtual void *allocIndirectGV(const GlobalValue *GV, + const uint8_t *Buffer, size_t Size, + unsigned Alignment) = 0; /// emitByte - This callback is invoked when a byte needs to be written to the /// output stream. @@ -158,7 +146,7 @@ public: } } - /// emitAlignment - Move the CurBufferPtr pointer up the the specified + /// emitAlignment - Move the CurBufferPtr pointer up to the specified /// alignment (saturated to BufferEnd of course). void emitAlignment(unsigned Alignment) { if (Alignment == 0) Alignment = 1; @@ -185,13 +173,20 @@ public: /// emitULEB128Bytes - This callback is invoked when a ULEB128 needs to be /// written to the output stream. - void emitULEB128Bytes(uint64_t Value) { + void emitULEB128Bytes(uint64_t Value, unsigned PadTo = 0) { do { uint8_t Byte = Value & 0x7f; Value >>= 7; - if (Value) Byte |= 0x80; + if (Value || PadTo != 0) Byte |= 0x80; emitByte(Byte); } while (Value); + + if (PadTo) { + do { + uint8_t Byte = (PadTo > 1) ? 0x80 : 0x0; + emitByte(Byte); + } while (--PadTo); + } } /// emitSLEB128Bytes - This callback is invoked when a SLEB128 needs to be @@ -212,8 +207,7 @@ public: /// emitString - This callback is invoked when a String needs to be /// written to the output stream. void emitString(const std::string &String) { - for (unsigned i = 0, N = static_cast(String.size()); - i < N; ++i) { + for (size_t i = 0, N = String.size(); i < N; ++i) { uint8_t C = String[i]; emitByte(C); } @@ -254,19 +248,19 @@ public: /// emitLabel - Emits a label - virtual void emitLabel(uint64_t LabelID) = 0; + void emitLabel(MCSymbol *Label) override = 0; /// allocateSpace - Allocate a block of space in the current output buffer, /// returning null (and setting conditions to indicate buffer overflow) on /// failure. Alignment is the alignment in bytes of the buffer desired. - virtual void *allocateSpace(uintptr_t Size, unsigned Alignment) { + void *allocateSpace(uintptr_t Size, unsigned Alignment) override { emitAlignment(Alignment); void *Result; // Check for buffer overflow. if (Size >= (uintptr_t)(BufferEnd-CurBufferPtr)) { CurBufferPtr = BufferEnd; - Result = 0; + Result = nullptr; } else { // Allocate the space. Result = CurBufferPtr; @@ -284,18 +278,18 @@ public: /// StartMachineBasicBlock - This should be called by the target when a new /// basic block is about to be emitted. This way the MCE knows where the /// start of the block is, and can implement getMachineBasicBlockAddress. - virtual void StartMachineBasicBlock(MachineBasicBlock *MBB) = 0; - + void StartMachineBasicBlock(MachineBasicBlock *MBB) override = 0; + /// getCurrentPCValue - This returns the address that the next emitted byte /// will be output to. /// - virtual uintptr_t getCurrentPCValue() const { + uintptr_t getCurrentPCValue() const override { return (uintptr_t)CurBufferPtr; } /// getCurrentPCOffset - Return the offset from the start of the emitted /// buffer that we are currently writing to. - uintptr_t getCurrentPCOffset() const { + uintptr_t getCurrentPCOffset() const override { return CurBufferPtr-BufferBegin; } @@ -304,38 +298,45 @@ public: /// creates jump tables or constant pools in memory on the fly while the /// object code emitters rely on a linker to have real addresses and should /// use relocations instead. - bool earlyResolveAddresses() const { return true; } + bool earlyResolveAddresses() const override { return true; } /// addRelocation - Whenever a relocatable address is needed, it should be /// noted with this interface. - virtual void addRelocation(const MachineRelocation &MR) = 0; - + void addRelocation(const MachineRelocation &MR) override = 0; + /// FIXME: These should all be handled with relocations! /// getConstantPoolEntryAddress - Return the address of the 'Index' entry in /// the constant pool that was last emitted with the emitConstantPool method. /// - virtual uintptr_t getConstantPoolEntryAddress(unsigned Index) const = 0; + uintptr_t getConstantPoolEntryAddress(unsigned Index) const override = 0; /// getJumpTableEntryAddress - Return the address of the jump table with index /// 'Index' in the function that last called initJumpTableInfo. /// - virtual uintptr_t getJumpTableEntryAddress(unsigned Index) const = 0; - + uintptr_t getJumpTableEntryAddress(unsigned Index) const override = 0; + /// getMachineBasicBlockAddress - Return the address of the specified /// MachineBasicBlock, only usable after the label for the MBB has been /// emitted. /// - virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const= 0; + uintptr_t + getMachineBasicBlockAddress(MachineBasicBlock *MBB) const override = 0; - /// getLabelAddress - Return the address of the specified LabelID, only usable - /// after the LabelID has been emitted. + /// getLabelAddress - Return the address of the specified Label, only usable + /// after the Label has been emitted. /// - virtual uintptr_t getLabelAddress(uint64_t LabelID) const = 0; - + uintptr_t getLabelAddress(MCSymbol *Label) const override = 0; + /// Specifies the MachineModuleInfo object. This is used for exception handling /// purposes. - virtual void setModuleInfo(MachineModuleInfo* Info) = 0; + void setModuleInfo(MachineModuleInfo* Info) override = 0; + + /// getLabelLocations - Return the label locations map of the label IDs to + /// their address. + virtual DenseMap *getLabelLocations() { + return nullptr; + } }; } // End llvm namespace