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https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74814 91177308-0d34-0410-b5e6-96231b3b80d8
143 lines
5.3 KiB
C++
143 lines
5.3 KiB
C++
//===-- llvm/CodeGen/ObjectCodeEmitter.cpp -------------------- -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/BinaryObject.h"
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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/MachineRelocation.h"
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#include "llvm/CodeGen/ObjectCodeEmitter.h"
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//===----------------------------------------------------------------------===//
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// ObjectCodeEmitter Implementation
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//===----------------------------------------------------------------------===//
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namespace llvm {
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ObjectCodeEmitter::ObjectCodeEmitter() : BO(0) {}
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ObjectCodeEmitter::ObjectCodeEmitter(BinaryObject *bo) : BO(bo) {}
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ObjectCodeEmitter::~ObjectCodeEmitter() {}
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/// setBinaryObject - set the BinaryObject we are writting to
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void ObjectCodeEmitter::setBinaryObject(BinaryObject *bo) { BO = bo; }
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/// emitByte - This callback is invoked when a byte needs to be
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/// written to the data stream, without buffer overflow testing.
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void ObjectCodeEmitter::emitByte(uint8_t B) {
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BO->emitByte(B);
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}
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/// emitWordLE - This callback is invoked when a 32-bit word needs to be
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/// written to the data stream in little-endian format.
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void ObjectCodeEmitter::emitWordLE(uint32_t W) {
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BO->emitWordLE(W);
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}
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/// emitWordBE - This callback is invoked when a 32-bit word needs to be
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/// written to the data stream in big-endian format.
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void ObjectCodeEmitter::emitWordBE(uint32_t W) {
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BO->emitWordBE(W);
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}
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/// emitDWordLE - This callback is invoked when a 64-bit word needs to be
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/// written to the data stream in little-endian format.
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void ObjectCodeEmitter::emitDWordLE(uint64_t W) {
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BO->emitDWordLE(W);
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}
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/// emitDWordBE - This callback is invoked when a 64-bit word needs to be
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/// written to the data stream in big-endian format.
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void ObjectCodeEmitter::emitDWordBE(uint64_t W) {
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BO->emitDWordBE(W);
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}
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/// emitAlignment - Move the CurBufferPtr pointer up the the specified
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/// alignment (saturated to BufferEnd of course).
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void ObjectCodeEmitter::emitAlignment(unsigned Alignment /* 0 */,
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uint8_t fill /* 0 */) {
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BO->emitAlignment(Alignment, fill);
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}
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/// emitULEB128Bytes - This callback is invoked when a ULEB128 needs to be
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/// written to the data stream.
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void ObjectCodeEmitter::emitULEB128Bytes(uint64_t Value) {
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BO->emitULEB128Bytes(Value);
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}
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/// emitSLEB128Bytes - This callback is invoked when a SLEB128 needs to be
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/// written to the data stream.
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void ObjectCodeEmitter::emitSLEB128Bytes(uint64_t Value) {
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BO->emitSLEB128Bytes(Value);
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}
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/// emitString - This callback is invoked when a String needs to be
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/// written to the data stream.
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void ObjectCodeEmitter::emitString(const std::string &String) {
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BO->emitString(String);
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}
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/// getCurrentPCValue - This returns the address that the next emitted byte
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/// will be output to.
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uintptr_t ObjectCodeEmitter::getCurrentPCValue() const {
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return BO->getCurrentPCOffset();
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}
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/// getCurrentPCOffset - Return the offset from the start of the emitted
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/// buffer that we are currently writing to.
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uintptr_t ObjectCodeEmitter::getCurrentPCOffset() const {
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return BO->getCurrentPCOffset();
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}
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/// addRelocation - Whenever a relocatable address is needed, it should be
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/// noted with this interface.
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void ObjectCodeEmitter::addRelocation(const MachineRelocation& relocation) {
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BO->addRelocation(relocation);
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}
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/// StartMachineBasicBlock - This should be called by the target when a new
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/// basic block is about to be emitted. This way the MCE knows where the
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/// start of the block is, and can implement getMachineBasicBlockAddress.
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void ObjectCodeEmitter::StartMachineBasicBlock(MachineBasicBlock *MBB) {
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if (MBBLocations.size() <= (unsigned)MBB->getNumber())
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MBBLocations.resize((MBB->getNumber()+1)*2);
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MBBLocations[MBB->getNumber()] = getCurrentPCOffset();
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}
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/// getMachineBasicBlockAddress - Return the address of the specified
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/// MachineBasicBlock, only usable after the label for the MBB has been
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/// emitted.
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uintptr_t
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ObjectCodeEmitter::getMachineBasicBlockAddress(MachineBasicBlock *MBB) const {
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assert(MBBLocations.size() > (unsigned)MBB->getNumber() &&
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MBBLocations[MBB->getNumber()] && "MBB not emitted!");
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return MBBLocations[MBB->getNumber()];
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}
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/// getJumpTableEntryAddress - Return the address of the jump table with index
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/// 'Index' in the function that last called initJumpTableInfo.
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uintptr_t ObjectCodeEmitter::getJumpTableEntryAddress(unsigned Index) const {
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assert(JTLocations.size() > Index && "JT not emitted!");
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return JTLocations[Index];
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}
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/// getConstantPoolEntryAddress - Return the address of the 'Index' entry in
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/// the constant pool that was last emitted with the emitConstantPool method.
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uintptr_t ObjectCodeEmitter::getConstantPoolEntryAddress(unsigned Index) const {
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assert(CPLocations.size() > Index && "CP not emitted!");
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return CPLocations[Index];
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}
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/// getConstantPoolEntrySection - Return the section of the 'Index' entry in
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/// the constant pool that was last emitted with the emitConstantPool method.
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uintptr_t ObjectCodeEmitter::getConstantPoolEntrySection(unsigned Index) const {
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assert(CPSections.size() > Index && "CP not emitted!");
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return CPSections[Index];
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}
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} // end namespace llvm
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