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