[mips][XRay] Use the base version of emitXRayTable

[sdardis]

Summary

Follow up rL290858 by removing the MIPS specific version of XRayTable
emission in favour of the basic version.

This resolves a buildbot failure where the ELF sections were malformed
causing the linker to reject the object files with xray related sections.

[dberris]

LGTM -- thanks, @sdardis!

[slthakur]

LGTM

[sdardis]

Thanks for the review.

llvm/trunk/lib/Target/Mips/MipsAsmPrinter.cpp

bool MipsAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
   MCP = MF.getConstantPool();
 
   // In NaCl, all indirect jump targets must be aligned to bundle size.
   if (Subtarget->isTargetNaCl())
     NaClAlignIndirectJumpTargets(MF);
 
   AsmPrinter::runOnMachineFunction(MF);
 
-  EmitXRayTable();
+  emitXRayTable();
 
   return true;
 }
 
 bool MipsAsmPrinter::lowerOperand(const MachineOperand &MO, MCOperand &MCOp) {
   MCOp = MCInstLowering.LowerOperand(MO);
   return MCOp.isValid();
 }
EmitToStreamer(*OutStreamer,
                        .addReg(Mips::T9)
                        .addReg(Mips::T9)
                        .addImm(0x34));
   }
 
   recordSled(CurSled, MI, Kind);
 }
 
-void MipsAsmPrinter::EmitXRayTable() {
-  if (Sleds.empty())
-    return;
-  if (Subtarget->isTargetELF()) {
-    auto PrevSection = OutStreamer->getCurrentSectionOnly();
-    auto Fn = MF->getFunction();
-    MCSection *Section;
-
-    if (Fn->hasComdat())
-      Section = OutContext.getELFSection("xray_instr_map", ELF::SHT_PROGBITS,
-                                         ELF::SHF_ALLOC | ELF::SHF_GROUP, 0,
-                                         Fn->getComdat()->getName());
-    else
-      Section =
-          OutContext.getELFSection("xray_instr_map", ELF::SHT_PROGBITS,
-                                   ELF::SHF_ALLOC, 0, CurrentFnSym->getName());
-
-    OutStreamer->SwitchSection(Section);
-    for (const auto &Sled : Sleds) {
-      OutStreamer->EmitSymbolValue(Sled.Sled, Subtarget->isGP64bit() ? 8 : 4);
-      OutStreamer->EmitSymbolValue(CurrentFnSym, Subtarget->isGP64bit() ? 8 : 4);
-      auto Kind = static_cast<uint8_t>(Sled.Kind);
-      OutStreamer->EmitBytes(
-          StringRef(reinterpret_cast<const char *>(&Kind), 1));
-      OutStreamer->EmitBytes(
-          StringRef(reinterpret_cast<const char *>(&Sled.AlwaysInstrument), 1));
-      OutStreamer->EmitZeros(Subtarget->isGP64bit() ? 14 : 6);
-    }
-    OutStreamer->SwitchSection(PrevSection);
-  }
-  Sleds.clear();
-}
-
 void MipsAsmPrinter::LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI) {
   EmitSled(MI, SledKind::FUNCTION_ENTER);
 }
 
 void MipsAsmPrinter::LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI) {
   EmitSled(MI, SledKind::FUNCTION_EXIT);
 }