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https://github.com/c64scene-ar/llvm-6502.git
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994176ad7c
TargetRegisterInfo. DebugLocEntry now holds a buffer with the raw bytes of the pre-calculated DWARF expression. Ought to be NFC, but it does slightly alter the output format of the textual assembly. This reapplies 230930 without the assertion in DebugLocEntry::finalize() because not all Machine registers can be lowered into DWARF register numbers and floating point constants cannot be expressed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231023 91177308-0d34-0410-b5e6-96231b3b80d8
101 lines
3.0 KiB
C++
101 lines
3.0 KiB
C++
//===-- llvm/CodeGen/ByteStreamer.h - ByteStreamer class --------*- 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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//
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// This file contains a class that can take bytes that would normally be
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// streamed via the AsmPrinter.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_BYTESTREAMER_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_BYTESTREAMER_H
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#include "DIEHash.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/LEB128.h"
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#include <string>
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namespace llvm {
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class ByteStreamer {
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public:
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virtual ~ByteStreamer() {}
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// For now we're just handling the calls we need for dwarf emission/hashing.
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virtual void EmitInt8(uint8_t Byte, const Twine &Comment = "") = 0;
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virtual void EmitSLEB128(uint64_t DWord, const Twine &Comment = "") = 0;
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virtual void EmitULEB128(uint64_t DWord, const Twine &Comment = "") = 0;
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};
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class APByteStreamer : public ByteStreamer {
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private:
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AsmPrinter &AP;
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public:
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APByteStreamer(AsmPrinter &Asm) : AP(Asm) {}
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void EmitInt8(uint8_t Byte, const Twine &Comment) override {
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AP.OutStreamer.AddComment(Comment);
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AP.EmitInt8(Byte);
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}
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void EmitSLEB128(uint64_t DWord, const Twine &Comment) override {
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AP.OutStreamer.AddComment(Comment);
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AP.EmitSLEB128(DWord);
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}
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void EmitULEB128(uint64_t DWord, const Twine &Comment) override {
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AP.OutStreamer.AddComment(Comment);
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AP.EmitULEB128(DWord);
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}
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};
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class HashingByteStreamer : public ByteStreamer {
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private:
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DIEHash &Hash;
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public:
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HashingByteStreamer(DIEHash &H) : Hash(H) {}
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void EmitInt8(uint8_t Byte, const Twine &Comment) override {
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Hash.update(Byte);
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}
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void EmitSLEB128(uint64_t DWord, const Twine &Comment) override {
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Hash.addSLEB128(DWord);
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}
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void EmitULEB128(uint64_t DWord, const Twine &Comment) override {
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Hash.addULEB128(DWord);
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}
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};
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class BufferByteStreamer : public ByteStreamer {
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private:
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SmallVectorImpl<char> &Buffer;
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// FIXME: This is actually only needed for textual asm output.
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SmallVectorImpl<std::string> &Comments;
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public:
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BufferByteStreamer(SmallVectorImpl<char> &Buffer,
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SmallVectorImpl<std::string> &Comments)
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: Buffer(Buffer), Comments(Comments) {}
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void EmitInt8(uint8_t Byte, const Twine &Comment) override {
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Buffer.push_back(Byte);
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Comments.push_back(Comment.str());
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}
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void EmitSLEB128(uint64_t DWord, const Twine &Comment) override {
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raw_svector_ostream OSE(Buffer);
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encodeSLEB128(DWord, OSE);
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Comments.push_back(Comment.str());
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}
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void EmitULEB128(uint64_t DWord, const Twine &Comment) override {
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raw_svector_ostream OSE(Buffer);
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encodeULEB128(DWord, OSE);
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Comments.push_back(Comment.str());
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}
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};
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}
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#endif
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