136 lines
5.2 KiB
C++
136 lines
5.2 KiB
C++
//=====- NVPTXTargetStreamer.cpp - NVPTXTargetStreamer class ------------=====//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the NVPTXTargetStreamer class.
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//
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//===----------------------------------------------------------------------===//
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#include "NVPTXTargetStreamer.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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using namespace llvm;
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//
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// NVPTXTargetStreamer Implemenation
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//
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NVPTXTargetStreamer::NVPTXTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
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NVPTXTargetStreamer::~NVPTXTargetStreamer() = default;
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void NVPTXTargetStreamer::outputDwarfFileDirectives() {
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for (const std::string &S : DwarfFiles)
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getStreamer().emitRawText(S.data());
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DwarfFiles.clear();
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}
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void NVPTXTargetStreamer::closeLastSection() {
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if (HasSections)
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getStreamer().emitRawText("\t}");
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}
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void NVPTXTargetStreamer::emitDwarfFileDirective(StringRef Directive) {
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DwarfFiles.emplace_back(Directive);
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}
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static bool isDwarfSection(const MCObjectFileInfo *FI,
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const MCSection *Section) {
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// FIXME: the checks for the DWARF sections are very fragile and should be
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// fixed up in a followup patch.
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if (!Section || Section->getKind().isText() ||
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Section->getKind().isWriteable())
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return false;
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return Section == FI->getDwarfAbbrevSection() ||
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Section == FI->getDwarfInfoSection() ||
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Section == FI->getDwarfMacinfoSection() ||
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Section == FI->getDwarfFrameSection() ||
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Section == FI->getDwarfAddrSection() ||
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Section == FI->getDwarfRangesSection() ||
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Section == FI->getDwarfARangesSection() ||
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Section == FI->getDwarfLocSection() ||
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Section == FI->getDwarfStrSection() ||
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Section == FI->getDwarfLineSection() ||
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Section == FI->getDwarfStrOffSection() ||
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Section == FI->getDwarfLineStrSection() ||
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Section == FI->getDwarfPubNamesSection() ||
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Section == FI->getDwarfPubTypesSection() ||
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Section == FI->getDwarfSwiftASTSection() ||
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Section == FI->getDwarfTypesDWOSection() ||
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Section == FI->getDwarfAbbrevDWOSection() ||
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Section == FI->getDwarfAccelObjCSection() ||
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Section == FI->getDwarfAccelNamesSection() ||
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Section == FI->getDwarfAccelTypesSection() ||
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Section == FI->getDwarfAccelNamespaceSection() ||
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Section == FI->getDwarfLocDWOSection() ||
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Section == FI->getDwarfStrDWOSection() ||
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Section == FI->getDwarfCUIndexSection() ||
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Section == FI->getDwarfInfoDWOSection() ||
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Section == FI->getDwarfLineDWOSection() ||
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Section == FI->getDwarfTUIndexSection() ||
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Section == FI->getDwarfStrOffDWOSection() ||
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Section == FI->getDwarfDebugNamesSection() ||
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Section == FI->getDwarfDebugInlineSection() ||
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Section == FI->getDwarfGnuPubNamesSection() ||
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Section == FI->getDwarfGnuPubTypesSection();
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}
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void NVPTXTargetStreamer::changeSection(const MCSection *CurSection,
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MCSection *Section,
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const MCExpr *SubSection,
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raw_ostream &OS) {
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assert(!SubSection && "SubSection is not null!");
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const MCObjectFileInfo *FI = getStreamer().getContext().getObjectFileInfo();
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// Emit closing brace for DWARF sections only.
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if (isDwarfSection(FI, CurSection))
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OS << "\t}\n";
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if (isDwarfSection(FI, Section)) {
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// Emit DWARF .file directives in the outermost scope.
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outputDwarfFileDirectives();
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OS << "\t.section";
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Section->PrintSwitchToSection(*getStreamer().getContext().getAsmInfo(),
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FI->getTargetTriple(), OS, SubSection);
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// DWARF sections are enclosed into braces - emit the open one.
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OS << "\t{\n";
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HasSections = true;
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}
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}
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void NVPTXTargetStreamer::emitRawBytes(StringRef Data) {
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MCTargetStreamer::emitRawBytes(Data);
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// TODO: enable this once the bug in the ptxas with the packed bytes is
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// resolved. Currently, (it is confirmed by NVidia) it causes a crash in
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// ptxas.
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#if 0
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const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo();
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const char *Directive = MAI->getData8bitsDirective();
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unsigned NumElements = Data.size();
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const unsigned MaxLen = 40;
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unsigned NumChunks = 1 + ((NumElements - 1) / MaxLen);
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// Split the very long directives into several parts if the limit is
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// specified.
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for (unsigned I = 0; I < NumChunks; ++I) {
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SmallString<128> Str;
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raw_svector_ostream OS(Str);
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const char *Label = Directive;
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for (auto It = std::next(Data.bytes_begin(), I * MaxLen),
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End = (I == NumChunks - 1)
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? Data.bytes_end()
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: std::next(Data.bytes_begin(), (I + 1) * MaxLen);
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It != End; ++It) {
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OS << Label << (unsigned)*It;
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if (Label == Directive)
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Label = ",";
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}
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Streamer.emitRawText(OS.str());
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}
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#endif
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}
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