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 uint32_t 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 class NVPTXAsmTargetStreamer : public NVPTXTargetStreamer { 54 public: 55 NVPTXAsmTargetStreamer(MCStreamer &S); 56 ~NVPTXAsmTargetStreamer() override; 57 }; 58 59 } // end namespace llvm 60 61 #endif 62