#ifndef LLVM_CODEGEN_JITCODEEMITTER_H
#define LLVM_CODEGEN_JITCODEEMITTER_H
-#include <string>
-#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 <string>
namespace llvm {
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
/// occurred, more memory is allocated, and we reemit the code into it.
///
class JITCodeEmitter : public MachineCodeEmitter {
+ virtual void anchor();
public:
virtual ~JITCodeEmitter() {}
///
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. The BufferState must be
- /// passed to finishGVStub, and start/finish pairs with the same BufferState
- /// must be properly nested.
- ///
- virtual void startGVStub(BufferState &BS, const GlobalValue* GV,
- unsigned StubSize, unsigned Alignment = 1) = 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. The BufferState must be passed to
- /// finishGVStub, and start/finish pairs with the same BufferState must be
- /// properly nested.
- ///
- virtual void startGVStub(BufferState &BS, void *Buffer,
- unsigned StubSize) = 0;
-
- /// finishGVStub - This callback is invoked to terminate a GV stub and returns
- /// the start address of the stub. The BufferState must first have been
- /// passed to startGVStub.
- ///
- virtual void *finishGVStub(BufferState &BS) = 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.
}
}
- /// 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;
/// 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
/// emitLabel - Emits a label
- virtual void emitLabel(uint64_t LabelID) = 0;
+ virtual void emitLabel(MCSymbol *Label) = 0;
/// allocateSpace - Allocate a block of space in the current output buffer,
/// returning null (and setting conditions to indicate buffer overflow) on
///
virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const= 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;
+ virtual uintptr_t getLabelAddress(MCSymbol *Label) const = 0;
/// Specifies the MachineModuleInfo object. This is used for exception handling
/// purposes.
virtual void setModuleInfo(MachineModuleInfo* Info) = 0;
+
+ /// getLabelLocations - Return the label locations map of the label IDs to
+ /// their address.
+ virtual DenseMap<MCSymbol*, uintptr_t> *getLabelLocations() { return 0; }
};
} // End llvm namespace