Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

external/llvm/lib/CodeGen/AsmPrinter/MonoException.cpp

@@ -254,8 +254,7 @@ MonoException::~MonoException()
 void
 MonoException::beginFunction(const MachineFunction *MF)
 {
-  if (DisableGNUEH && Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
-    static_cast<ARMTargetStreamer*>(Asm->OutStreamer->getTargetStreamer())->emitFnStart();
+  EmitFnStart();
   EHLabels.clear();
 }
 
@@ -363,6 +362,20 @@ MonoException::PrepareMonoLSDA(EHInfo *info)
   }
 }
 
+void
+MonoException::EmitFnStart(void)
+{
+  if (DisableGNUEH && Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+    static_cast<ARMTargetStreamer*>(Asm->OutStreamer->getTargetStreamer())->emitFnStart();
+}
+
+void
+MonoException::EmitFnEnd(void)
+{
+  if (DisableGNUEH && Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+    static_cast<ARMTargetStreamer*>(Asm->OutStreamer->getTargetStreamer())->emitFnEnd();
+}
+
 void
 MonoException::endFunction(const MachineFunction *MF)
 {
@@ -390,8 +403,10 @@ MonoException::endFunction(const MachineFunction *MF)
 
   int monoMethodIdx = FuncIndexes.lookup (Asm->MF->getFunction ().getName ()) - 1;
 
-  if (monoMethodIdx == -1)
+  if (monoMethodIdx == -1) {
+    EmitFnEnd ();
     return;
+  }
 
   //outs () << "D: " << Asm->MF->getFunction()->getName() << " " << monoMethodIdx << "\n";
 
@@ -416,8 +431,7 @@ MonoException::endFunction(const MachineFunction *MF)
   Frames.push_back(info);
   EHLabels.clear();
 
-  if (DisableGNUEH && Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
-    static_cast<ARMTargetStreamer*>(Asm->OutStreamer->getTargetStreamer())->emitFnEnd();
+  EmitFnEnd ();
 }
 
 /// EmitMonoLSDA - Mono's version of EmitExceptionTable

external/llvm/lib/CodeGen/AsmPrinter/MonoException.h

@@ -67,6 +67,8 @@ private:
 
   void PrepareMonoLSDA(EHInfo *info);
   void EmitMonoLSDA(const EHInfo *info);
+  void EmitFnStart();
+  void EmitFnEnd();
 
   std::vector<MCSymbol*> EHLabels;
   std::vector<EHInfo> Frames;

external/llvm/lib/CodeGen/BuiltinGCs.cpp

@@ -122,6 +122,20 @@ public:
   }
 };
 
+/// A GCStrategy for the Mono Runtime.
+class MonoGC : public GCStrategy {
+public:
+  MonoGC() {
+    UseStatepoints = true;
+    // These options are all gc.root specific, we specify them so that the
+    // gc.root lowering code doesn't run.
+    InitRoots = false;
+    NeededSafePoints = 0;
+    UsesMetadata = false;
+    CustomRoots = false;
+  }
+};
+
 } // end anonymous namespace
 
 // Register all the above so that they can be found at runtime.  Note that
@@ -135,6 +149,7 @@ static GCRegistry::Add<ShadowStackGC>
 static GCRegistry::Add<StatepointGC> D("statepoint-example",
                                        "an example strategy for statepoint");
 static GCRegistry::Add<CoreCLRGC> E("coreclr", "CoreCLR-compatible GC");
+static GCRegistry::Add<MonoGC> F("mono", "Mono-compatible GC");
 
 // Provide hooks to ensure the containing library is fully loaded.
 void llvm::linkErlangGC() {}
@@ -142,3 +157,4 @@ void llvm::linkOcamlGC() {}
 void llvm::linkShadowStackGC() {}
 void llvm::linkStatepointExampleGC() {}
 void llvm::linkCoreCLRGC() {}
+void llvm::linkMonoGC() {}

external/llvm/lib/CodeGen/IfConversion.cpp

@@ -1714,20 +1714,25 @@ bool IfConverter::IfConvertDiamondCommon(
   }
 
   // Remove the duplicated instructions at the beginnings of both paths.
-  // Skip dbg_value instructions
+  // Skip dbg_value instructions.
   MachineBasicBlock::iterator DI1 = MBB1.getFirstNonDebugInstr();
   MachineBasicBlock::iterator DI2 = MBB2.getFirstNonDebugInstr();
   BBI1->NonPredSize -= NumDups1;
   BBI2->NonPredSize -= NumDups1;
 
   // Skip past the dups on each side separately since there may be
-  // differing dbg_value entries.
+  // differing dbg_value entries. NumDups1 can include a "return"
+  // instruction, if it's not marked as "branch".
   for (unsigned i = 0; i < NumDups1; ++DI1) {
+    if (DI1 == MBB1.end())
+      break;
     if (!DI1->isDebugValue())
       ++i;
   }
   while (NumDups1 != 0) {
     ++DI2;
+    if (DI2 == MBB2.end())
+      break;
     if (!DI2->isDebugValue())
       --NumDups1;
   }
@@ -1738,11 +1743,16 @@ bool IfConverter::IfConvertDiamondCommon(
       Redefs.stepForward(MI, Dummy);
     }
   }
+
   BBI.BB->splice(BBI.BB->end(), &MBB1, MBB1.begin(), DI1);
   MBB2.erase(MBB2.begin(), DI2);
 
-  // The branches have been checked to match, so it is safe to remove the branch
-  // in BB1 and rely on the copy in BB2
+  // The branches have been checked to match, so it is safe to remove the
+  // branch in BB1 and rely on the copy in BB2. The complication is that
+  // the blocks may end with a return instruction, which may or may not
+  // be marked as "branch". If it's not, then it could be included in
+  // "dups1", leaving the blocks potentially empty after moving the common
+  // duplicates.
 #ifndef NDEBUG
   // Unanalyzable branches must match exactly. Check that now.
   if (!BBI1->IsBrAnalyzable)
@@ -1768,11 +1778,14 @@ bool IfConverter::IfConvertDiamondCommon(
   if (RemoveBranch)
     BBI2->NonPredSize -= TII->removeBranch(*BBI2->BB);
   else {
-    do {
-      assert(DI2 != MBB2.begin());
-      DI2--;
-    } while (DI2->isBranch() || DI2->isDebugValue());
-    DI2++;
+    // Make DI2 point to the end of the range where the common "tail"
+    // instructions could be found.
+    while (DI2 != MBB2.begin()) {
+      MachineBasicBlock::iterator Prev = std::prev(DI2);
+      if (!Prev->isBranch() && !Prev->isDebugValue())
+        break;
+      DI2 = Prev;
+    }
   }
   while (NumDups2 != 0) {
     // NumDups2 only counted non-dbg_value instructions, so this won't
@@ -1833,11 +1846,15 @@ bool IfConverter::IfConvertDiamondCommon(
   // a non-predicated in BBI2, then we don't want to predicate the one from
   // BBI2. The reason is that if we merged these blocks, we would end up with
   // two predicated terminators in the same block.
+  // Also, if the branches in MBB1 and MBB2 were non-analyzable, then don't
+  // predicate them either. They were checked to be identical, and so the
+  // same branch would happen regardless of which path was taken.
   if (!MBB2.empty() && (DI2 == MBB2.end())) {
     MachineBasicBlock::iterator BBI1T = MBB1.getFirstTerminator();
     MachineBasicBlock::iterator BBI2T = MBB2.getFirstTerminator();
-    if (BBI1T != MBB1.end() && TII->isPredicated(*BBI1T) &&
-        BBI2T != MBB2.end() && !TII->isPredicated(*BBI2T))
+    bool BB1Predicated = BBI1T != MBB1.end() && TII->isPredicated(*BBI1T);
+    bool BB2NonPredicated = BBI2T != MBB2.end() && !TII->isPredicated(*BBI2T);
+    if (BB2NonPredicated && (BB1Predicated || !BBI2->IsBrAnalyzable))
       --DI2;
   }
 

external/llvm/lib/CodeGen/MachineBasicBlock.cpp

@@ -646,6 +646,14 @@ void MachineBasicBlock::replaceSuccessor(MachineBasicBlock *Old,
   removeSuccessor(OldI);
 }
 
+void MachineBasicBlock::copySuccessor(MachineBasicBlock *Orig,
+                                      succ_iterator I) {
+  if (Orig->Probs.empty())
+    addSuccessor(*I, Orig->getSuccProbability(I));
+  else
+    addSuccessorWithoutProb(*I);
+}
+
 void MachineBasicBlock::addPredecessor(MachineBasicBlock *Pred) {
   Predecessors.push_back(Pred);
 }

external/llvm/lib/CodeGen/MachineBlockPlacement.cpp.REMOVED.git-id

@@ -1 +1 @@
-84c808ee79384e97d654aaf92c19da99349d5089
+167135b56ec08d4c417c661972e2470f2d2270fc

external/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp

@@ -1422,7 +1422,8 @@ RuntimeDyldELF::processRelocationRef(
       SectionEntry &Section = Sections[SectionID];
       uint8_t *Target = Section.getAddressWithOffset(Offset);
       bool RangeOverflow = false;
-      if (!Value.SymbolName && SymType != SymbolRef::ST_Unknown) {
+      bool IsExtern = Value.SymbolName || SymType == SymbolRef::ST_Unknown;
+      if (!IsExtern) {
         if (AbiVariant != 2) {
           // In the ELFv1 ABI, a function call may point to the .opd entry,
           // so the final symbol value is calculated based on the relocation
@@ -1432,21 +1433,24 @@ RuntimeDyldELF::processRelocationRef(
         } else {
           // In the ELFv2 ABI, a function symbol may provide a local entry
           // point, which must be used for direct calls.
-          uint8_t SymOther = Symbol->getOther();
-          Value.Addend += ELF::decodePPC64LocalEntryOffset(SymOther);
+          if (Value.SectionID == SectionID){
+            uint8_t SymOther = Symbol->getOther();
+            Value.Addend += ELF::decodePPC64LocalEntryOffset(SymOther);
+          }
         }
         uint8_t *RelocTarget =
             Sections[Value.SectionID].getAddressWithOffset(Value.Addend);
         int64_t delta = static_cast<int64_t>(Target - RelocTarget);
         // If it is within 26-bits branch range, just set the branch target
-        if (SignExtend64<26>(delta) == delta) {
+        if (SignExtend64<26>(delta) != delta) {
+          RangeOverflow = true;
+        } else if ((AbiVariant != 2) ||
+                   (AbiVariant == 2  && Value.SectionID == SectionID)) {
           RelocationEntry RE(SectionID, Offset, RelType, Value.Addend);
           addRelocationForSection(RE, Value.SectionID);
-        } else {
-          RangeOverflow = true;
         }
       }
-      if (Value.SymbolName || SymType == SymbolRef::ST_Unknown ||
+      if (IsExtern || (AbiVariant == 2 && Value.SectionID != SectionID) ||
           RangeOverflow) {
         // It is an external symbol (either Value.SymbolName is set, or
         // SymType is SymbolRef::ST_Unknown) or out of range.
@@ -1503,10 +1507,10 @@ RuntimeDyldELF::processRelocationRef(
                             RelType, 0);
           Section.advanceStubOffset(getMaxStubSize());
         }
-        if (Value.SymbolName || SymType == SymbolRef::ST_Unknown) {
+        if (IsExtern || (AbiVariant == 2 && Value.SectionID != SectionID)) {
           // Restore the TOC for external calls
           if (AbiVariant == 2)
-            writeInt32BE(Target + 4, 0xE8410018); // ld r2,28(r1)
+            writeInt32BE(Target + 4, 0xE8410018); // ld r2,24(r1)
           else
             writeInt32BE(Target + 4, 0xE8410028); // ld r2,40(r1)
         }

external/llvm/lib/IR/Core.cpp.REMOVED.git-id

@@ -1 +1 @@
-d3c33edec18678ed71afabbb48c58ea7cf935cd9
+743e3710fd68217eb6053cdcfb0d36bee2993927

external/llvm/lib/MC/MCObjectFileInfo.cpp

@@ -289,6 +289,8 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
   case Triple::mips64el:
     FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
     break;
+  case Triple::ppc64:
+  case Triple::ppc64le:
   case Triple::x86_64:
     FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
                      (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);

external/llvm/lib/Support/CMakeLists.txt

@@ -13,8 +13,13 @@ elseif( CMAKE_HOST_UNIX )
   if( HAVE_LIBDL )
     set(system_libs ${system_libs} ${CMAKE_DL_LIBS})
   endif()
-  if( HAVE_BACKTRACE )
-    set(system_libs ${system_libs} ${Backtrace_LIBRARIES})
+  if( HAVE_BACKTRACE AND NOT "${Backtrace_LIBRARIES}" STREQUAL "" )
+    # On BSDs, CMake returns a fully qualified path to the backtrace library.
+    # We need to remove the path and the 'lib' prefix, to make it look like a
+    # regular short library name, suitable for appending to a -l link flag.
+    get_filename_component(Backtrace_LIBFILE ${Backtrace_LIBRARIES} NAME_WE)
+    STRING(REGEX REPLACE "^lib" "" Backtrace_LIBFILE ${Backtrace_LIBFILE})
+    set(system_libs ${system_libs} ${Backtrace_LIBFILE})
   endif()
   if(LLVM_ENABLE_TERMINFO)
     if(HAVE_TERMINFO)

external/llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp

@@ -299,6 +299,11 @@ void AArch64AsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNum,
     printOffset(MO.getOffset(), O);
     break;
   }
+  case MachineOperand::MO_BlockAddress: {
+    MCSymbol *Sym = GetBlockAddressSymbol(MO.getBlockAddress());
+    Sym->print(O, MAI);
+    break;
+  }
   }
 }
 

external/llvm/lib/Target/AArch64/AArch64FalkorHWPFFix.cpp

@@ -46,6 +46,7 @@
 #include "llvm/Pass.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/Debug.h"
+#include "llvm/Support/DebugCounter.h"
 #include "llvm/Support/raw_ostream.h"
 #include <cassert>
 #include <iterator>
@@ -60,6 +61,8 @@ STATISTIC(NumCollisionsAvoided,
           "Number of HW prefetch tag collisions avoided");
 STATISTIC(NumCollisionsNotAvoided,
           "Number of HW prefetch tag collisions not avoided due to lack of regsiters");
+DEBUG_COUNTER(FixCounter, "falkor-hwpf",
+              "Controls which tag collisions are avoided");
 
 namespace {
 
@@ -729,6 +732,21 @@ void FalkorHWPFFix::runOnLoop(MachineLoop &L, MachineFunction &Fn) {
       bool Fixed = false;
       DEBUG(dbgs() << "Attempting to fix tag collision: " << MI);
 
+      if (!DebugCounter::shouldExecute(FixCounter)) {
+        DEBUG(dbgs() << "Skipping fix due to debug counter:\n  " << MI);
+        continue;
+      }
+
+      // Add the non-base registers of MI as live so we don't use them as
+      // scratch registers.
+      for (unsigned OpI = 0, OpE = MI.getNumOperands(); OpI < OpE; ++OpI) {
+        if (OpI == static_cast<unsigned>(LdI.BaseRegIdx))
+          continue;
+        MachineOperand &MO = MI.getOperand(OpI);
+        if (MO.isReg() && MO.readsReg())
+          LR.addReg(MO.getReg());
+      }
+
       for (unsigned ScratchReg : AArch64::GPR64RegClass) {
         if (!LR.available(ScratchReg) || MRI.isReserved(ScratchReg))
           continue;

external/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp

@@ -917,6 +917,8 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
   int FPOffset = MFI.getObjectOffset(FI) + FixedObject + 16;
   int Offset = MFI.getObjectOffset(FI) + MFI.getStackSize();
   bool isFixed = MFI.isFixedObjectIndex(FI);
+  bool isCSR = !isFixed && MFI.getObjectOffset(FI) >=
+                               -((int)AFI->getCalleeSavedStackSize());
 
   // Use frame pointer to reference fixed objects. Use it for locals if
   // there are VLAs or a dynamically realigned SP (and thus the SP isn't
@@ -930,6 +932,12 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
     // Argument access should always use the FP.
     if (isFixed) {
       UseFP = hasFP(MF);
+    } else if (isCSR && RegInfo->needsStackRealignment(MF)) {
+      // References to the CSR area must use FP if we're re-aligning the stack
+      // since the dynamically-sized alignment padding is between the SP/BP and
+      // the CSR area.
+      assert(hasFP(MF) && "Re-aligned stack must have frame pointer");
+      UseFP = true;
     } else if (hasFP(MF) && !RegInfo->hasBasePointer(MF) &&
                !RegInfo->needsStackRealignment(MF)) {
       // Use SP or FP, whichever gives us the best chance of the offset
@@ -947,9 +955,9 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
     }
   }
 
-  assert((isFixed || !RegInfo->needsStackRealignment(MF) || !UseFP) &&
+  assert(((isFixed || isCSR) || !RegInfo->needsStackRealignment(MF) || !UseFP) &&
          "In the presence of dynamic stack pointer realignment, "
-         "non-argument objects cannot be accessed through the frame pointer");
+         "non-argument/CSR objects cannot be accessed through the frame pointer");
 
   if (UseFP) {
     FrameReg = RegInfo->getFrameRegister(MF);

external/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp.REMOVED.git-id

@@ -1 +1 @@
-9a021c751eec90145bb1ee521df8e93258028de5
+3fa5457b4e0cd4affafb6c28aff7b0e1156bc74c

external/llvm/lib/Target/AArch64/AArch64InstrInfo.td.REMOVED.git-id

@@ -1 +1 @@
-79826ca2ed8dc6f3d0f111508f3cb638fe2f4281
+040011d858e771021341f098d0f852310aba87f1

external/llvm/lib/Target/ARM/ARMFrameLowering.cpp

@@ -355,6 +355,7 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF,
   unsigned ArgRegsSaveSize = AFI->getArgRegsSaveSize();
   unsigned NumBytes = MFI.getStackSize();
   const std::vector<CalleeSavedInfo> &CSI = MFI.getCalleeSavedInfo();
+  bool AvoidNonfpCFA = false;
 
   // Debug location must be unknown since the first debug location is used
   // to determine the end of the prologue.
@@ -580,6 +581,7 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF,
                          dl, TII, FramePtr, ARM::SP,
                          PushSize + FramePtrOffsetInPush,
                          MachineInstr::FrameSetup);
+#if 0
     if (FramePtrOffsetInPush + PushSize != 0) {
       unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(
           nullptr, MRI->getDwarfRegNum(FramePtr, true),
@@ -595,6 +597,15 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF,
           .addCFIIndex(CFIIndex)
           .setMIFlags(MachineInstr::FrameSetup);
     }
+#else
+    /* on iOS `r7 + 8` is always the previous stack pointer */
+    unsigned CFIIndex = MF.addFrameInst(MCCFIInstruction::createDefCfa(nullptr, MRI->getDwarfRegNum(FramePtr, true), -8));
+    BuildMI(MBB, AfterPush, dl, TII.get(TargetOpcode::CFI_INSTRUCTION))
+      .addCFIIndex(CFIIndex)
+      .setMIFlags(MachineInstr::FrameSetup);
+
+    AvoidNonfpCFA = true;
+#endif
   }
 
   // Now that the prologue's actual instructions are finalised, we can insert
@@ -683,7 +694,8 @@ void ARMFrameLowering::emitPrologue(MachineFunction &MF,
   // throughout the process. If we have a frame pointer, it takes over the job
   // half-way through, so only the first few .cfi_def_cfa_offset instructions
   // actually get emitted.
-  DefCFAOffsetCandidates.emitDefCFAOffsets(MBB, dl, TII, HasFP);
+  if (!AvoidNonfpCFA)
+    DefCFAOffsetCandidates.emitDefCFAOffsets(MBB, dl, TII, HasFP);
 
   if (STI.isTargetELF() && hasFP(MF))
     MFI.setOffsetAdjustment(MFI.getOffsetAdjustment() -

external/llvm/lib/Target/Mips/MCTargetDesc/MipsELFObjectWriter.cpp

@@ -225,6 +225,8 @@ unsigned MipsELFObjectWriter::getRelocType(MCContext &Ctx,
   switch (Kind) {
   case Mips::fixup_Mips_NONE:
     return ELF::R_MIPS_NONE;
+  case FK_Data_1:
+    report_fatal_error("MIPS does not support one byte relocations");
   case Mips::fixup_Mips_16:
   case FK_Data_2:
     return IsPCRel ? ELF::R_MIPS_PC16 : ELF::R_MIPS_16;

external/llvm/lib/Target/Mips/MipsISelLowering.cpp.REMOVED.git-id

@@ -1 +1 @@
-ba05b0f48df79816f8fb55249b06a9b4ddbf9ba8
+3d383b3dfe3e476d0a59da5df71e4f1baac71288

external/llvm/lib/Target/Mips/MipsSEISelLowering.cpp.REMOVED.git-id

@@ -1 +1 @@
-f7d7e2af85e476555070b6045488a799d7022d3c
+eee5b23117f6fba5f0536879d0ab7f3b0fdc892c

external/llvm/lib/Target/NVPTX/NVPTXTargetMachine.cpp

@@ -44,6 +44,14 @@ static cl::opt<bool>
                                cl::desc("Disable load/store vectorizer"),
                                cl::init(false), cl::Hidden);
 
+// TODO: Remove this flag when we are confident with no regressions.
+static cl::opt<bool> DisableRequireStructuredCFG(
+    "disable-nvptx-require-structured-cfg",
+    cl::desc("Transitional flag to turn off NVPTX's requirement on preserving "
+             "structured CFG. The requirement should be disabled only when "
+             "unexpected regressions happen."),
+    cl::init(false), cl::Hidden);
+
 namespace llvm {
 
 void initializeNVVMIntrRangePass(PassRegistry&);
@@ -108,6 +116,8 @@ NVPTXTargetMachine::NVPTXTargetMachine(const Target &T, const Triple &TT,
     drvInterface = NVPTX::NVCL;
   else
     drvInterface = NVPTX::CUDA;
+  if (!DisableRequireStructuredCFG)
+    setRequiresStructuredCFG(true);
   initAsmInfo();
 }