[Hexagon] Adding MC ELF streamer and updating addend relocation test which shows correct ELF symbol.
llvm-svn: 239876
diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCELFStreamer.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCELFStreamer.cpp
new file mode 100644
index 0000000..bf51c35
--- /dev/null
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCELFStreamer.cpp
@@ -0,0 +1,152 @@
+//=== HexagonMCELFStreamer.cpp - Hexagon subclass of MCELFStreamer -------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a stub that parses a MCInst bundle and passes the
+// instructions on to the real streamer.
+//
+//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "hexagonmcelfstreamer"
+
+#include "Hexagon.h"
+#include "HexagonMCELFStreamer.h"
+#include "MCTargetDesc/HexagonBaseInfo.h"
+#include "MCTargetDesc/HexagonMCShuffler.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/MC/MCAssembler.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCSymbolELF.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+
+static cl::opt<unsigned>
+ GPSize("gpsize", cl::NotHidden,
+ cl::desc("Global Pointer Addressing Size. The default size is 8."),
+ cl::Prefix, cl::init(8));
+
+void HexagonMCELFStreamer::EmitInstruction(const MCInst &MCK,
+ const MCSubtargetInfo &STI) {
+ MCInst HMI;
+ HMI.setOpcode(Hexagon::BUNDLE);
+ HMI.addOperand(MCOperand::createImm(0));
+ MCInst *MCB;
+
+ if (MCK.getOpcode() != Hexagon::BUNDLE) {
+ HMI.addOperand(MCOperand::createInst(&MCK));
+ MCB = &HMI;
+ } else
+ MCB = const_cast<MCInst *>(&MCK);
+
+ // Examines packet and pad the packet, if needed, when an
+ // end-loop is in the bundle.
+ HexagonMCInstrInfo::padEndloop(*MCB);
+ HexagonMCShuffle(*MCII, STI, *MCB);
+
+ assert(HexagonMCInstrInfo::bundleSize(*MCB) <= HEXAGON_PACKET_SIZE);
+ bool Extended = false;
+ for (auto &I : HexagonMCInstrInfo::bundleInstructions(*MCB)) {
+ MCInst *MCI = const_cast<MCInst *>(I.getInst());
+ if (Extended) {
+ if (HexagonMCInstrInfo::isDuplex(*MCII, *MCI)) {
+ MCInst *SubInst = const_cast<MCInst *>(MCI->getOperand(1).getInst());
+ HexagonMCInstrInfo::clampExtended(*MCII, *SubInst);
+ } else {
+ HexagonMCInstrInfo::clampExtended(*MCII, *MCI);
+ }
+ Extended = false;
+ } else {
+ Extended = HexagonMCInstrInfo::isImmext(*MCI);
+ }
+ }
+
+ // At this point, MCB is a bundle
+ // Iterate through the bundle and assign addends for the instructions
+ for (auto const &I : HexagonMCInstrInfo::bundleInstructions(*MCB)) {
+ MCInst *MCI = const_cast<MCInst *>(I.getInst());
+ EmitSymbol(*MCI);
+ }
+ MCObjectStreamer::EmitInstruction(*MCB, STI);
+}
+
+void HexagonMCELFStreamer::EmitSymbol(const MCInst &Inst) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--;)
+ if (Inst.getOperand(i).isExpr())
+ visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+// EmitCommonSymbol and EmitLocalCommonSymbol are extended versions of the
+// functions found in MCELFStreamer.cpp taking AccessSize as an additional
+// parameter.
+void HexagonMCELFStreamer::HexagonMCEmitCommonSymbol(MCSymbol *Symbol,
+ uint64_t Size,
+ unsigned ByteAlignment,
+ unsigned AccessSize) {
+ getAssembler().registerSymbol(*Symbol);
+ StringRef sbss[4] = {".sbss.1", ".sbss.2", ".sbss.4", ".sbss.8"};
+
+ auto ELFSymbol = cast<MCSymbolELF>(Symbol);
+ if (!ELFSymbol->isBindingSet()) {
+ ELFSymbol->setBinding(ELF::STB_GLOBAL);
+ ELFSymbol->setExternal(true);
+ }
+
+ ELFSymbol->setType(ELF::STT_OBJECT);
+
+ if (ELFSymbol->getBinding() == ELF::STB_LOCAL) {
+ StringRef SectionName =
+ ((AccessSize == 0) || (Size == 0) || (Size > GPSize))
+ ? ".bss"
+ : sbss[(Log2_64(AccessSize))];
+
+ MCSection *CrntSection = getCurrentSection().first;
+ MCSection *Section = getAssembler().getContext().getELFSection(
+ SectionName, ELF::SHT_NOBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
+ SwitchSection(Section);
+ AssignSection(Symbol, Section);
+
+ MCELFStreamer::EmitCommonSymbol(Symbol, Size, ByteAlignment);
+ SwitchSection(CrntSection);
+ } else {
+ if (ELFSymbol->declareCommon(Size, ByteAlignment))
+ report_fatal_error("Symbol: " + Symbol->getName() +
+ " redeclared as different type");
+ if ((AccessSize) && (Size <= GPSize)) {
+ uint64_t SectionIndex =
+ (AccessSize <= GPSize)
+ ? ELF::SHN_HEXAGON_SCOMMON + (Log2_64(AccessSize) + 1)
+ : (unsigned)ELF::SHN_HEXAGON_SCOMMON;
+ ELFSymbol->setIndex(SectionIndex);
+ }
+ }
+
+ ELFSymbol->setSize(MCConstantExpr::create(Size, getContext()));
+}
+
+void HexagonMCELFStreamer::HexagonMCEmitLocalCommonSymbol(
+ MCSymbol *Symbol, uint64_t Size, unsigned ByteAlignment,
+ unsigned AccessSize) {
+ getAssembler().registerSymbol(*Symbol);
+ auto ELFSymbol = cast<MCSymbolELF>(Symbol);
+ ELFSymbol->setBinding(ELF::STB_LOCAL);
+ ELFSymbol->setExternal(false);
+ HexagonMCEmitCommonSymbol(Symbol, Size, ByteAlignment, AccessSize);
+}
+
+namespace llvm {
+MCStreamer *createHexagonELFStreamer(MCContext &Context, MCAsmBackend &MAB,
+ raw_pwrite_stream &OS, MCCodeEmitter *CE) {
+ return new HexagonMCELFStreamer(Context, MAB, OS, CE);
+}
+}