Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/MC/MCObjectWriter.h b/linux-x64/clang/include/llvm/MC/MCObjectWriter.h
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+//===- llvm/MC/MCObjectWriter.h - Object File Writer Interface --*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCOBJECTWRITER_H
+#define LLVM_MC_MCOBJECTWRITER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/EndianStream.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+#include <cstdint>
+
+namespace llvm {
+
+class MCAsmLayout;
+class MCAssembler;
+class MCFixup;
+class MCFragment;
+class MCSymbol;
+class MCSymbolRefExpr;
+class MCValue;
+
+/// Defines the object file and target independent interfaces used by the
+/// assembler backend to write native file format object files.
+///
+/// The object writer contains a few callbacks used by the assembler to allow
+/// the object writer to modify the assembler data structures at appropriate
+/// points. Once assembly is complete, the object writer is given the
+/// MCAssembler instance, which contains all the symbol and section data which
+/// should be emitted as part of writeObject().
+///
+/// The object writer also contains a number of helper methods for writing
+/// binary data to the output stream.
+class MCObjectWriter {
+ raw_pwrite_stream *OS;
+
+protected:
+ unsigned IsLittleEndian : 1;
+
+ // Can only create subclasses.
+ MCObjectWriter(raw_pwrite_stream &OS, bool IsLittleEndian)
+ : OS(&OS), IsLittleEndian(IsLittleEndian) {}
+
+ unsigned getInitialOffset() {
+ return OS->tell();
+ }
+
+public:
+ MCObjectWriter(const MCObjectWriter &) = delete;
+ MCObjectWriter &operator=(const MCObjectWriter &) = delete;
+ virtual ~MCObjectWriter();
+
+ /// lifetime management
+ virtual void reset() {}
+
+ bool isLittleEndian() const { return IsLittleEndian; }
+
+ raw_pwrite_stream &getStream() { return *OS; }
+ void setStream(raw_pwrite_stream &NewOS) { OS = &NewOS; }
+
+ /// \name High-Level API
+ /// @{
+
+ /// Perform any late binding of symbols (for example, to assign symbol
+ /// indices for use when generating relocations).
+ ///
+ /// This routine is called by the assembler after layout and relaxation is
+ /// complete.
+ virtual void executePostLayoutBinding(MCAssembler &Asm,
+ const MCAsmLayout &Layout) = 0;
+
+ /// Record a relocation entry.
+ ///
+ /// This routine is called by the assembler after layout and relaxation, and
+ /// post layout binding. The implementation is responsible for storing
+ /// information about the relocation so that it can be emitted during
+ /// writeObject().
+ virtual void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
+ const MCFragment *Fragment,
+ const MCFixup &Fixup, MCValue Target,
+ uint64_t &FixedValue) = 0;
+
+ /// Check whether the difference (A - B) between two symbol references is
+ /// fully resolved.
+ ///
+ /// Clients are not required to answer precisely and may conservatively return
+ /// false, even when a difference is fully resolved.
+ bool isSymbolRefDifferenceFullyResolved(const MCAssembler &Asm,
+ const MCSymbolRefExpr *A,
+ const MCSymbolRefExpr *B,
+ bool InSet) const;
+
+ virtual bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
+ const MCSymbol &A,
+ const MCSymbol &B,
+ bool InSet) const;
+
+ virtual bool isSymbolRefDifferenceFullyResolvedImpl(const MCAssembler &Asm,
+ const MCSymbol &SymA,
+ const MCFragment &FB,
+ bool InSet,
+ bool IsPCRel) const;
+
+ /// Write the object file.
+ ///
+ /// This routine is called by the assembler after layout and relaxation is
+ /// complete, fixups have been evaluated and applied, and relocations
+ /// generated.
+ virtual void writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) = 0;
+
+ /// @}
+ /// \name Binary Output
+ /// @{
+
+ void write8(uint8_t Value) { *OS << char(Value); }
+
+ void writeLE16(uint16_t Value) {
+ support::endian::Writer<support::little>(*OS).write(Value);
+ }
+
+ void writeLE32(uint32_t Value) {
+ support::endian::Writer<support::little>(*OS).write(Value);
+ }
+
+ void writeLE64(uint64_t Value) {
+ support::endian::Writer<support::little>(*OS).write(Value);
+ }
+
+ void writeBE16(uint16_t Value) {
+ support::endian::Writer<support::big>(*OS).write(Value);
+ }
+
+ void writeBE32(uint32_t Value) {
+ support::endian::Writer<support::big>(*OS).write(Value);
+ }
+
+ void writeBE64(uint64_t Value) {
+ support::endian::Writer<support::big>(*OS).write(Value);
+ }
+
+ void write16(uint16_t Value) {
+ if (IsLittleEndian)
+ writeLE16(Value);
+ else
+ writeBE16(Value);
+ }
+
+ void write32(uint32_t Value) {
+ if (IsLittleEndian)
+ writeLE32(Value);
+ else
+ writeBE32(Value);
+ }
+
+ void write64(uint64_t Value) {
+ if (IsLittleEndian)
+ writeLE64(Value);
+ else
+ writeBE64(Value);
+ }
+
+ void WriteZeros(unsigned N) {
+ const char Zeros[16] = {0};
+
+ for (unsigned i = 0, e = N / 16; i != e; ++i)
+ *OS << StringRef(Zeros, 16);
+
+ *OS << StringRef(Zeros, N % 16);
+ }
+
+ void writeBytes(const SmallVectorImpl<char> &ByteVec,
+ unsigned ZeroFillSize = 0) {
+ writeBytes(StringRef(ByteVec.data(), ByteVec.size()), ZeroFillSize);
+ }
+
+ void writeBytes(StringRef Str, unsigned ZeroFillSize = 0) {
+ // TODO: this version may need to go away once all fragment contents are
+ // converted to SmallVector<char, N>
+ assert(
+ (ZeroFillSize == 0 || Str.size() <= ZeroFillSize) &&
+ "data size greater than fill size, unexpected large write will occur");
+ *OS << Str;
+ if (ZeroFillSize)
+ WriteZeros(ZeroFillSize - Str.size());
+ }
+
+ /// @}
+};
+
+} // end namespace llvm
+
+#endif // LLVM_MC_MCOBJECTWRITER_H