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
14namespace llvm {
15class MCSection;
16
17/// Implments NVPTX-specific streamer.
18class NVPTXTargetStreamer : public MCTargetStreamer {
19private:
20 SmallVector<std::string, 4> DwarfFiles;
21 bool HasSections = false;
22
23public:
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 /// Makes sure that labels are mangled the same way as the actual symbols.
52 void emitValue(const MCExpr *Value) override;
53};
54
55class NVPTXAsmTargetStreamer : public NVPTXTargetStreamer {
56public:
57 NVPTXAsmTargetStreamer(MCStreamer &S);
58 ~NVPTXAsmTargetStreamer() override;
59};
60
61} // end namespace llvm
62
63#endif
64