#define LLVM_CODEGEN_MACHINECODEEMITTER_H
#include "llvm/Support/DataTypes.h"
-#include <vector>
namespace llvm {
protected:
/// BufferBegin/BufferEnd - Pointers to the start and end of the memory
/// allocated for this code buffer.
- unsigned char *BufferBegin, *BufferEnd;
+ uint8_t *BufferBegin, *BufferEnd;
/// CurBufferPtr - Pointer to the next byte of memory to fill when emitting
/// code. This is guranteed to be in the range [BufferBegin,BufferEnd]. If
/// this pointer is at BufferEnd, it will never move due to code emission, and
/// all code emission requests will be ignored (this is the buffer overflow
/// condition).
- unsigned char *CurBufferPtr;
+ uint8_t *CurBufferPtr;
public:
virtual ~MachineCodeEmitter() {}
/// false.
///
virtual bool finishFunction(MachineFunction &F) = 0;
-
- /// startFunctionStub - This callback is invoked when the JIT needs the
- /// address of a function that has not been code generated yet. The StubSize
- /// specifies the total size required by the stub. Stubs are not allowed to
- /// have constant pools, the can only use the other emitByte*/emitWord*
- /// methods.
- ///
- virtual void startFunctionStub(const GlobalValue* F, unsigned StubSize,
- unsigned Alignment = 1) = 0;
-
- /// finishFunctionStub - This callback is invoked to terminate a function
- /// stub.
- ///
- virtual void *finishFunctionStub(const GlobalValue* F) = 0;
/// emitByte - This callback is invoked when a byte needs to be written to the
/// output stream.
///
- void emitByte(unsigned char B) {
+ void emitByte(uint8_t B) {
if (CurBufferPtr != BufferEnd)
*CurBufferPtr++ = B;
}
/// emitWordLE - This callback is invoked when a 32-bit word needs to be
/// written to the output stream in little-endian format.
///
- void emitWordLE(unsigned W) {
- if (CurBufferPtr+4 <= BufferEnd) {
- *CurBufferPtr++ = (unsigned char)(W >> 0);
- *CurBufferPtr++ = (unsigned char)(W >> 8);
- *CurBufferPtr++ = (unsigned char)(W >> 16);
- *CurBufferPtr++ = (unsigned char)(W >> 24);
+ void emitWordLE(uint32_t W) {
+ if (4 <= BufferEnd-CurBufferPtr) {
+ *CurBufferPtr++ = (uint8_t)(W >> 0);
+ *CurBufferPtr++ = (uint8_t)(W >> 8);
+ *CurBufferPtr++ = (uint8_t)(W >> 16);
+ *CurBufferPtr++ = (uint8_t)(W >> 24);
} else {
CurBufferPtr = BufferEnd;
}
/// emitWordBE - This callback is invoked when a 32-bit word needs to be
/// written to the output stream in big-endian format.
///
- void emitWordBE(unsigned W) {
- if (CurBufferPtr+4 <= BufferEnd) {
- *CurBufferPtr++ = (unsigned char)(W >> 24);
- *CurBufferPtr++ = (unsigned char)(W >> 16);
- *CurBufferPtr++ = (unsigned char)(W >> 8);
- *CurBufferPtr++ = (unsigned char)(W >> 0);
+ void emitWordBE(uint32_t W) {
+ if (4 <= BufferEnd-CurBufferPtr) {
+ *CurBufferPtr++ = (uint8_t)(W >> 24);
+ *CurBufferPtr++ = (uint8_t)(W >> 16);
+ *CurBufferPtr++ = (uint8_t)(W >> 8);
+ *CurBufferPtr++ = (uint8_t)(W >> 0);
+ } else {
+ CurBufferPtr = BufferEnd;
+ }
+ }
+
+ /// emitDWordLE - This callback is invoked when a 64-bit word needs to be
+ /// written to the output stream in little-endian format.
+ ///
+ void emitDWordLE(uint64_t W) {
+ if (8 <= BufferEnd-CurBufferPtr) {
+ *CurBufferPtr++ = (uint8_t)(W >> 0);
+ *CurBufferPtr++ = (uint8_t)(W >> 8);
+ *CurBufferPtr++ = (uint8_t)(W >> 16);
+ *CurBufferPtr++ = (uint8_t)(W >> 24);
+ *CurBufferPtr++ = (uint8_t)(W >> 32);
+ *CurBufferPtr++ = (uint8_t)(W >> 40);
+ *CurBufferPtr++ = (uint8_t)(W >> 48);
+ *CurBufferPtr++ = (uint8_t)(W >> 56);
+ } else {
+ CurBufferPtr = BufferEnd;
+ }
+ }
+
+ /// emitDWordBE - This callback is invoked when a 64-bit word needs to be
+ /// written to the output stream in big-endian format.
+ ///
+ void emitDWordBE(uint64_t W) {
+ if (8 <= BufferEnd-CurBufferPtr) {
+ *CurBufferPtr++ = (uint8_t)(W >> 56);
+ *CurBufferPtr++ = (uint8_t)(W >> 48);
+ *CurBufferPtr++ = (uint8_t)(W >> 40);
+ *CurBufferPtr++ = (uint8_t)(W >> 32);
+ *CurBufferPtr++ = (uint8_t)(W >> 24);
+ *CurBufferPtr++ = (uint8_t)(W >> 16);
+ *CurBufferPtr++ = (uint8_t)(W >> 8);
+ *CurBufferPtr++ = (uint8_t)(W >> 0);
} else {
CurBufferPtr = BufferEnd;
}
/// alignment (saturated to BufferEnd of course).
void emitAlignment(unsigned Alignment) {
if (Alignment == 0) Alignment = 1;
- // Move the current buffer ptr up to the specified alignment.
- CurBufferPtr =
- (unsigned char*)(((intptr_t)CurBufferPtr+Alignment-1) &
- ~(intptr_t)(Alignment-1));
- if (CurBufferPtr > BufferEnd)
+
+ if(Alignment <= (uintptr_t)(BufferEnd-CurBufferPtr)) {
+ // Move the current buffer ptr up to the specified alignment.
+ CurBufferPtr =
+ (uint8_t*)(((uintptr_t)CurBufferPtr+Alignment-1) &
+ ~(uintptr_t)(Alignment-1));
+ } else {
CurBufferPtr = BufferEnd;
+ }
}
/// emitULEB128Bytes - This callback is invoked when a ULEB128 needs to be
/// written to the output stream.
- void emitULEB128Bytes(unsigned Value) {
+ void emitULEB128Bytes(uint64_t Value) {
do {
- unsigned char Byte = Value & 0x7f;
+ uint8_t Byte = Value & 0x7f;
Value >>= 7;
if (Value) Byte |= 0x80;
emitByte(Byte);
/// emitSLEB128Bytes - This callback is invoked when a SLEB128 needs to be
/// written to the output stream.
- void emitSLEB128Bytes(int Value) {
- int Sign = Value >> (8 * sizeof(Value) - 1);
+ void emitSLEB128Bytes(uint64_t Value) {
+ uint64_t Sign = Value >> (8 * sizeof(Value) - 1);
bool IsMore;
do {
- unsigned char Byte = Value & 0x7f;
+ uint8_t Byte = Value & 0x7f;
Value >>= 7;
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
if (IsMore) Byte |= 0x80;
void emitString(const std::string &String) {
for (unsigned i = 0, N = static_cast<unsigned>(String.size());
i < N; ++i) {
- unsigned char C = String[i];
+ uint8_t C = String[i];
emitByte(C);
}
emitByte(0);
}
/// emitInt32 - Emit a int32 directive.
- void emitInt32(int Value) {
- if (CurBufferPtr+4 <= BufferEnd) {
+ void emitInt32(int32_t Value) {
+ if (4 <= BufferEnd-CurBufferPtr) {
*((uint32_t*)CurBufferPtr) = Value;
CurBufferPtr += 4;
} else {
/// emitInt64 - Emit a int64 directive.
void emitInt64(uint64_t Value) {
- if (CurBufferPtr+8 <= BufferEnd) {
+ if (8 <= BufferEnd-CurBufferPtr) {
*((uint64_t*)CurBufferPtr) = Value;
CurBufferPtr += 8;
} else {
}
}
- /// emitAt - Emit Value in Addr
- void emitAt(uintptr_t *Addr, uintptr_t Value) {
+ /// emitInt32At - Emit the Int32 Value in Addr.
+ void emitInt32At(uintptr_t *Addr, uintptr_t Value) {
+ if (Addr >= (uintptr_t*)BufferBegin && Addr < (uintptr_t*)BufferEnd)
+ (*(uint32_t*)Addr) = (uint32_t)Value;
+ }
+
+ /// emitInt64At - Emit the Int64 Value in Addr.
+ void emitInt64At(uintptr_t *Addr, uintptr_t Value) {
if (Addr >= (uintptr_t*)BufferBegin && Addr < (uintptr_t*)BufferEnd)
- (*Addr) = Value;
+ (*(uint64_t*)Addr) = (uint64_t)Value;
}
+
/// emitLabel - Emits a label
virtual void emitLabel(uint64_t LabelID) = 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.
- void *allocateSpace(intptr_t Size, unsigned Alignment) {
+ virtual void *allocateSpace(uintptr_t Size, unsigned Alignment) {
emitAlignment(Alignment);
- void *Result = CurBufferPtr;
-
- // Allocate the space.
- CurBufferPtr += Size;
+ void *Result;
// Check for buffer overflow.
- if (CurBufferPtr >= BufferEnd) {
+ if (Size >= (uintptr_t)(BufferEnd-CurBufferPtr)) {
CurBufferPtr = BufferEnd;
Result = 0;
+ } else {
+ // Allocate the space.
+ Result = CurBufferPtr;
+ CurBufferPtr += Size;
}
+
return Result;
}
/// getCurrentPCValue - This returns the address that the next emitted byte
/// will be output to.
///
- virtual intptr_t getCurrentPCValue() const {
- return (intptr_t)CurBufferPtr;
+ virtual uintptr_t getCurrentPCValue() const {
+ return (uintptr_t)CurBufferPtr;
}
/// getCurrentPCOffset - Return the offset from the start of the emitted
/// buffer that we are currently writing to.
- intptr_t getCurrentPCOffset() const {
+ virtual uintptr_t getCurrentPCOffset() const {
return CurBufferPtr-BufferBegin;
}
/// addRelocation - Whenever a relocatable address is needed, it should be
/// noted with this interface.
virtual void addRelocation(const MachineRelocation &MR) = 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 intptr_t getConstantPoolEntryAddress(unsigned Index) const = 0;
+ virtual uintptr_t getConstantPoolEntryAddress(unsigned Index) const = 0;
/// getJumpTableEntryAddress - Return the address of the jump table with index
/// 'Index' in the function that last called initJumpTableInfo.
///
- virtual intptr_t getJumpTableEntryAddress(unsigned Index) const = 0;
+ virtual uintptr_t getJumpTableEntryAddress(unsigned Index) const = 0;
/// getMachineBasicBlockAddress - Return the address of the specified
/// MachineBasicBlock, only usable after the label for the MBB has been
/// emitted.
///
- virtual intptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const= 0;
+ virtual uintptr_t getMachineBasicBlockAddress(MachineBasicBlock *MBB) const= 0;
/// getLabelAddress - Return the address of the specified LabelID, only usable
/// after the LabelID has been emitted.
///
- virtual intptr_t getLabelAddress(uint64_t LabelID) const = 0;
+ virtual uintptr_t getLabelAddress(uint64_t LabelID) const = 0;
/// Specifies the MachineModuleInfo object. This is used for exception handling
/// purposes.
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