lib/Target/NVPTX/MCTargetDesc/NVPTXTargetStreamer.h

   1 //=====-- NVPTXTargetStreamer.h - NVPTX Target Streamer ------*- C++ -*--=====//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLVM_LIB_TARGET_NVPTX_MCTARGETDESC_NVPTXTARGETSTREAMER_H
  10 #define LLVM_LIB_TARGET_NVPTX_MCTARGETDESC_NVPTXTARGETSTREAMER_H
  11
  12 #include "llvm/MC/MCStreamer.h"
  13
  14 namespace llvm {
  15 class MCSection;
  16
  17 /// Implments NVPTX-specific streamer.
  18 class NVPTXTargetStreamer : public MCTargetStreamer {
  19 private:
  20   SmallVector<std::string, 4> DwarfFiles;
  21   bool HasSections = false;
  22
  23 public:
  24   NVPTXTargetStreamer(MCStreamer &S);
  25   ~NVPTXTargetStreamer() override;
  26
  27   /// Outputs the list of the DWARF '.file' directives to the streamer.
  28   void outputDwarfFileDirectives();
  29   /// Close last section.
  30   void closeLastSection();
  31
  32   /// Record DWARF file directives for later output.
  33   /// According to PTX ISA, CUDA Toolkit documentation, 11.5.3. Debugging
  34   /// Directives: .file
  35   /// (http://docs.nvidia.com/cuda/parallel-thread-execution/index.html#debugging-directives-file),
  36   /// The .file directive is allowed only in the outermost scope, i.e., at the
  37   /// same level as kernel and device function declarations. Also, the order of
  38   /// the .loc and .file directive does not matter, .file directives may follow
  39   /// the .loc directives where the file is referenced.
  40   /// LLVM emits .file directives immediately the location debug info is
  41   /// emitted, i.e. they may be emitted inside functions. We gather all these
  42   /// directives and emit them outside of the sections and, thus, outside of the
  43   /// functions.
  44   void emitDwarfFileDirective(StringRef Directive) override;
  45   void changeSection(const MCSection *CurSection, MCSection *Section,
  46                      const MCExpr *SubSection, raw_ostream &OS) override;
  47   /// Emit the bytes in \p Data into the output.
  48   ///
  49   /// This is used to emit bytes in \p Data as sequence of .byte directives.
  50   void emitRawBytes(StringRef Data) override;
  51 };
  52
  53 } // end namespace llvm
  54
  55 #endif