1 files changed, 25 insertions, 15 deletions

diff --git a/lib/Target/AArch64/AArch64AsmPrinter.cpp b/lib/Target/AArch64/AArch64AsmPrinter.cpp
index 8bee4f5..d64d851 100644
--- a/lib/Target/AArch64/AArch64AsmPrinter.cpp
+++ b/lib/Target/AArch64/AArch64AsmPrinter.cpp
@@ -43,19 +43,13 @@ using namespace llvm;
 namespace {
 
 class AArch64AsmPrinter : public AsmPrinter {
-  /// Subtarget - Keep a pointer to the AArch64Subtarget around so that we can
-  /// make the right decision when printing asm code for different targets.
-  const AArch64Subtarget *Subtarget;
-
   AArch64MCInstLower MCInstLowering;
   StackMaps SM;
 
 public:
-  AArch64AsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
-      : AsmPrinter(TM, Streamer),
-        Subtarget(&TM.getSubtarget<AArch64Subtarget>()),
-        MCInstLowering(OutContext, *this), SM(*this), AArch64FI(nullptr),
-        LOHLabelCounter(0) {}
+  AArch64AsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
+      : AsmPrinter(TM, std::move(Streamer)), MCInstLowering(OutContext, *this),
+        SM(*this), AArch64FI(nullptr), LOHLabelCounter(0) {}
 
   const char *getPassName() const override {
     return "AArch64 Assembly Printer";
@@ -124,7 +118,8 @@ private:
 //===----------------------------------------------------------------------===//
 
 void AArch64AsmPrinter::EmitEndOfAsmFile(Module &M) {
-  if (Subtarget->isTargetMachO()) {
+  Triple TT(TM.getTargetTriple());
+  if (TT.isOSBinFormatMachO()) {
     // Funny Darwin hack: This flag tells the linker that no global symbols
     // contain code that falls through to other global symbols (e.g. the obvious
     // implementation of multiple entry points).  If this doesn't occur, the
@@ -135,7 +130,7 @@ void AArch64AsmPrinter::EmitEndOfAsmFile(Module &M) {
   }
 
   // Emit a .data.rel section containing any stubs that were created.
-  if (Subtarget->isTargetELF()) {
+  if (TT.isOSBinFormatELF()) {
     const TargetLoweringObjectFileELF &TLOFELF =
       static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
 
@@ -145,7 +140,7 @@ void AArch64AsmPrinter::EmitEndOfAsmFile(Module &M) {
     MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
     if (!Stubs.empty()) {
       OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
-      const DataLayout *TD = TM.getSubtargetImpl()->getDataLayout();
+      const DataLayout *TD = TM.getDataLayout();
 
       for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
         OutStreamer.EmitLabel(Stubs[i].first);
@@ -252,8 +247,8 @@ bool AArch64AsmPrinter::printAsmRegInClass(const MachineOperand &MO,
                                            const TargetRegisterClass *RC,
                                            bool isVector, raw_ostream &O) {
   assert(MO.isReg() && "Should only get here with a register!");
-  const AArch64RegisterInfo *RI = static_cast<const AArch64RegisterInfo *>(
-      TM.getSubtargetImpl()->getRegisterInfo());
+  const AArch64RegisterInfo *RI =
+      MF->getSubtarget<AArch64Subtarget>().getRegisterInfo();
   unsigned Reg = MO.getReg();
   unsigned RegToPrint = RC->getRegister(RI->getEncodingValue(Reg));
   assert(RI->regsOverlap(RegToPrint, Reg));
@@ -381,8 +376,23 @@ void AArch64AsmPrinter::LowerSTACKMAP(MCStreamer &OutStreamer, StackMaps &SM,
   unsigned NumNOPBytes = MI.getOperand(1).getImm();
 
   SM.recordStackMap(MI);
-  // Emit padding.
   assert(NumNOPBytes % 4 == 0 && "Invalid number of NOP bytes requested!");
+
+  // Scan ahead to trim the shadow.
+  const MachineBasicBlock &MBB = *MI.getParent();
+  MachineBasicBlock::const_iterator MII(MI);
+  ++MII;
+  while (NumNOPBytes > 0) {
+    if (MII == MBB.end() || MII->isCall() ||
+        MII->getOpcode() == AArch64::DBG_VALUE ||
+        MII->getOpcode() == TargetOpcode::PATCHPOINT ||
+        MII->getOpcode() == TargetOpcode::STACKMAP)
+      break;
+    ++MII;
+    NumNOPBytes -= 4;
+  }
+
+  // Emit nops.
   for (unsigned i = 0; i < NumNOPBytes; i += 4)
     EmitToStreamer(OutStreamer, MCInstBuilder(AArch64::HINT).addImm(0));
 }