Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 123 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/MC/MCObjectWriter.h b/clang-r353983/include/llvm/MC/MCObjectWriter.h
new file mode 100644
index 00000000..2547b2b7
--- /dev/null
+++ b/clang-r353983/include/llvm/MC/MCObjectWriter.h
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+//===- llvm/MC/MCObjectWriter.h - Object File Writer Interface --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_MC_MCOBJECTWRITER_H
+#define LLVM_MC_MCOBJECTWRITER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.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().
+class MCObjectWriter {
+protected:
+  MCObjectWriter() = default;
+
+public:
+  MCObjectWriter(const MCObjectWriter &) = delete;
+  MCObjectWriter &operator=(const MCObjectWriter &) = delete;
+  virtual ~MCObjectWriter();
+
+  /// lifetime management
+  virtual void reset() {}
+
+  /// \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;
+
+  /// Tell the object writer to emit an address-significance table during
+  /// writeObject(). If this function is not called, all symbols are treated as
+  /// address-significant.
+  virtual void emitAddrsigSection() {}
+
+  /// Record the given symbol in the address-significance table to be written
+  /// diring writeObject().
+  virtual void addAddrsigSymbol(const MCSymbol *Sym) {}
+
+  /// Write the object file and returns the number of bytes written.
+  ///
+  /// This routine is called by the assembler after layout and relaxation is
+  /// complete, fixups have been evaluated and applied, and relocations
+  /// generated.
+  virtual uint64_t writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) = 0;
+
+  /// @}
+};
+
+/// Base class for classes that define behaviour that is specific to both the
+/// target and the object format.
+class MCObjectTargetWriter {
+public:
+  virtual ~MCObjectTargetWriter() = default;
+  virtual Triple::ObjectFormatType getFormat() const = 0;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_MC_MCOBJECTWRITER_H