[WinEH] Update exception pointer registers

Summary:
The CLR's personality routine passes these in rdx/edx, not rax/eax.

Make getExceptionPointerRegister a virtual method parameterized by
personality function to allow making this distinction.

Similarly make getExceptionSelectorRegister a virtual method parameterized
by personality function, for symmetry.


Reviewers: pgavlin, majnemer, rnk

Subscribers: jyknight, dsanders, llvm-commits

Differential Revision: http://reviews.llvm.org/D14344

llvm-svn: 252383

include/llvm/Target/TargetLowering.h

@@ -939,15 +939,19 @@ public:
   }
 
   /// If a physical register, this returns the register that receives the
-  /// exception address on entry to a landing pad.
+  /// exception address on entry to an EH pad.
-  unsigned getExceptionPointerRegister() const {
+  virtual unsigned
-    return ExceptionPointerRegister;
+  getExceptionPointerRegister(const Constant *PersonalityFn) const {
+    // 0 is guaranteed to be the NoRegister value on all targets
+    return 0;
   }
 
   /// If a physical register, this returns the register that receives the
   /// exception typeid on entry to a landing pad.
-  unsigned getExceptionSelectorRegister() const {
+  virtual unsigned
-    return ExceptionSelectorRegister;
+  getExceptionSelectorRegister(const Constant *PersonalityFn) const {
+    // 0 is guaranteed to be the NoRegister value on all targets
+    return 0;
   }
 
   /// Returns the target's jmp_buf size in bytes (if never set, the default is
@@ -1228,18 +1232,6 @@ protected:
     StackPointerRegisterToSaveRestore = R;
   }
 
-  /// If set to a physical register, this sets the register that receives the
-  /// exception address on entry to a landing pad.
-  void setExceptionPointerRegister(unsigned R) {
-    ExceptionPointerRegister = R;
-  }
-
-  /// If set to a physical register, this sets the register that receives the
-  /// exception typeid on entry to a landing pad.
-  void setExceptionSelectorRegister(unsigned R) {
-    ExceptionSelectorRegister = R;
-  }
-
   /// Tells the code generator not to expand operations into sequences that use
   /// the select operations if possible.
   void setSelectIsExpensive(bool isExpensive = true) {
@@ -1856,14 +1848,6 @@ private:
   /// llvm.savestack/llvm.restorestack should save and restore.
   unsigned StackPointerRegisterToSaveRestore;
 
-  /// If set to a physical register, this specifies the register that receives
-  /// the exception address on entry to a landing pad.
-  unsigned ExceptionPointerRegister;
-
-  /// If set to a physical register, this specifies the register that receives
-  /// the exception typeid on entry to a landing pad.
-  unsigned ExceptionSelectorRegister;
-
   /// This indicates the default register class to use for each ValueType the
   /// target supports natively.
   const TargetRegisterClass *RegClassForVT[MVT::LAST_VALUETYPE];

lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -2184,8 +2184,9 @@ void SelectionDAGBuilder::visitLandingPad(const LandingPadInst &LP) {
   // If there aren't registers to copy the values into (e.g., during SjLj
   // exceptions), then don't bother to create these DAG nodes.
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
-  if (TLI.getExceptionPointerRegister() == 0 &&
+  const Constant *PersonalityFn = FuncInfo.Fn->getPersonalityFn();
-      TLI.getExceptionSelectorRegister() == 0)
+  if (TLI.getExceptionPointerRegister(PersonalityFn) == 0 &&
+      TLI.getExceptionSelectorRegister(PersonalityFn) == 0)
     return;
 
   SmallVector<EVT, 2> ValueVTs;

lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

@@ -938,6 +938,7 @@ static bool hasExceptionPointerOrCodeUser(const CatchPadInst *CPI) {
 /// do other setup for EH landing-pad blocks.
 bool SelectionDAGISel::PrepareEHLandingPad() {
   MachineBasicBlock *MBB = FuncInfo->MBB;
+  const Constant *PersonalityFn = FuncInfo->Fn->getPersonalityFn();
   const BasicBlock *LLVMBB = MBB->getBasicBlock();
   const TargetRegisterClass *PtrRC =
       TLI->getRegClassFor(TLI->getPointerTy(CurDAG->getDataLayout()));
@@ -948,7 +949,7 @@ bool SelectionDAGISel::PrepareEHLandingPad() {
     if (hasExceptionPointerOrCodeUser(CPI)) {
       // Get or create the virtual register to hold the pointer or code.  Mark
       // the live in physreg and copy into the vreg.
-      MCPhysReg EHPhysReg = TLI->getExceptionPointerRegister();
+      MCPhysReg EHPhysReg = TLI->getExceptionPointerRegister(PersonalityFn);
       assert(EHPhysReg && "target lacks exception pointer register");
       MBB->addLiveIn(EHPhysReg);
       unsigned VReg = FuncInfo->getCatchPadExceptionPointerVReg(CPI, PtrRC);
@@ -974,11 +975,11 @@ bool SelectionDAGISel::PrepareEHLandingPad() {
     .addSym(Label);
 
   // Mark exception register as live in.
-  if (unsigned Reg = TLI->getExceptionPointerRegister())
+  if (unsigned Reg = TLI->getExceptionPointerRegister(PersonalityFn))
     FuncInfo->ExceptionPointerVirtReg = MBB->addLiveIn(Reg, PtrRC);
 
   // Mark exception selector register as live in.
-  if (unsigned Reg = TLI->getExceptionSelectorRegister())
+  if (unsigned Reg = TLI->getExceptionSelectorRegister(PersonalityFn))
     FuncInfo->ExceptionSelectorVirtReg = MBB->addLiveIn(Reg, PtrRC);
 
   return true;

lib/CodeGen/TargetLoweringBase.cpp

@@ -765,8 +765,6 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm) : TM(tm) {
   EnableExtLdPromotion = false;
   HasFloatingPointExceptions = true;
   StackPointerRegisterToSaveRestore = 0;
-  ExceptionPointerRegister = 0;
-  ExceptionSelectorRegister = 0;
   BooleanContents = UndefinedBooleanContent;
   BooleanFloatContents = UndefinedBooleanContent;
   BooleanVectorContents = UndefinedBooleanContent;

lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -196,11 +196,6 @@ AArch64TargetLowering::AArch64TargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Expand);
 
-  // Exception handling.
-  // FIXME: These are guesses. Has this been defined yet?
-  setExceptionPointerRegister(AArch64::X0);
-  setExceptionSelectorRegister(AArch64::X1);
-
   // Constant pool entries
   setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
 

lib/Target/AArch64/AArch64ISelLowering.h

@@ -15,6 +15,7 @@
 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64ISELLOWERING_H
 #define LLVM_LIB_TARGET_AARCH64_AARCH64ISELLOWERING_H
 
+#include "AArch64.h"
 #include "llvm/CodeGen/CallingConvLower.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/IR/CallingConv.h"
@@ -366,6 +367,22 @@ public:
   /// returns the address of that location. Otherwise, returns nullptr.
   Value *getSafeStackPointerLocation(IRBuilder<> &IRB) const override;
 
+  /// If a physical register, this returns the register that receives the
+  /// exception address on entry to an EH pad.
+  unsigned
+  getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+    // FIXME: This is a guess. Has this been defined yet?
+    return AArch64::X0;
+  }
+
+  /// If a physical register, this returns the register that receives the
+  /// exception typeid on entry to a landing pad.
+  unsigned
+  getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+    // FIXME: This is a guess. Has this been defined yet?
+    return AArch64::X1;
+  }
+
 private:
   bool isExtFreeImpl(const Instruction *Ext) const override;
 

lib/Target/ARM/ARMISelLowering.cpp

@@ -813,13 +813,6 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::STACKSAVE,          MVT::Other, Expand);
   setOperationAction(ISD::STACKRESTORE,       MVT::Other, Expand);
 
-  if (!Subtarget->useSjLjEH()) {
-    // Platforms which do not use SjLj EH may return values in these registers
-    // via the personality function.
-    setExceptionPointerRegister(ARM::R0);
-    setExceptionSelectorRegister(ARM::R1);
-  }
-
   if (Subtarget->getTargetTriple().isWindowsItaniumEnvironment())
     setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
   else
@@ -12147,3 +12140,17 @@ bool ARMTargetLowering::functionArgumentNeedsConsecutiveRegisters(
   bool IsIntArray = Ty->isArrayTy() && Ty->getArrayElementType()->isIntegerTy();
   return IsHA || IsIntArray;
 }
+
+unsigned ARMTargetLowering::getExceptionPointerRegister(
+    const Constant *PersonalityFn) const {
+  // Platforms which do not use SjLj EH may return values in these registers
+  // via the personality function.
+  return Subtarget->useSjLjEH() ? ARM::NoRegister : ARM::R0;
+}
+
+unsigned ARMTargetLowering::getExceptionSelectorRegister(
+    const Constant *PersonalityFn) const {
+  // Platforms which do not use SjLj EH may return values in these registers
+  // via the personality function.
+  return Subtarget->useSjLjEH() ? ARM::NoRegister : ARM::R1;
+}

lib/Target/ARM/ARMISelLowering.h

@@ -423,6 +423,16 @@ namespace llvm {
     bool functionArgumentNeedsConsecutiveRegisters(
         Type *Ty, CallingConv::ID CallConv, bool isVarArg) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override;
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override;
+
     Instruction *makeDMB(IRBuilder<> &Builder, ARM_MB::MemBOpt Domain) const;
     Value *emitLoadLinked(IRBuilder<> &Builder, Value *Addr,
                           AtomicOrdering Ord) const override;

lib/Target/Hexagon/HexagonISelLowering.cpp

@@ -1286,8 +1286,6 @@ HexagonTargetLowering::HexagonTargetLowering(const TargetMachine &TM,
   setPrefFunctionAlignment(4);
   setMinFunctionAlignment(2);
   setInsertFencesForAtomic(false);
-  setExceptionPointerRegister(Hexagon::R0);
-  setExceptionSelectorRegister(Hexagon::R1);
   setStackPointerRegisterToSaveRestore(HRI.getStackRegister());
 
   if (EnableHexSDNodeSched)

lib/Target/Hexagon/HexagonISelLowering.h

@@ -163,6 +163,20 @@ bool isPositiveHalfWord(SDNode *N);
     MachineBasicBlock * EmitInstrWithCustomInserter(MachineInstr *MI,
         MachineBasicBlock *BB) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+      return Hexagon::R0;
+    }
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+      return Hexagon::R1;
+    }
+
     SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) const;
     SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
     EVT getSetCCResultType(const DataLayout &, LLVMContext &C,

lib/Target/Mips/MipsISelLowering.cpp

@@ -438,9 +438,6 @@ MipsTargetLowering::MipsTargetLowering(const MipsTargetMachine &TM,
 
   setStackPointerRegisterToSaveRestore(ABI.IsN64() ? Mips::SP_64 : Mips::SP);
 
-  setExceptionPointerRegister(ABI.IsN64() ? Mips::A0_64 : Mips::A0);
-  setExceptionSelectorRegister(ABI.IsN64() ? Mips::A1_64 : Mips::A1);
-
   MaxStoresPerMemcpy = 16;
 
   isMicroMips = Subtarget.inMicroMipsMode();

lib/Target/Mips/MipsISelLowering.h

@@ -267,6 +267,20 @@ namespace llvm {
     unsigned getRegisterByName(const char* RegName, EVT VT,
                                SelectionDAG &DAG) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+      return ABI.IsN64() ? Mips::A0_64 : Mips::A0;
+    }
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+      return ABI.IsN64() ? Mips::A1_64 : Mips::A1;
+    }
+
     /// Returns true if a cast between SrcAS and DestAS is a noop.
     bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
       // Mips doesn't have any special address spaces so we just reserve

lib/Target/PowerPC/PPCISelLowering.cpp

@@ -827,15 +827,7 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
     setLibcallName(RTLIB::SRA_I128, nullptr);
   }
 
-  if (isPPC64) {
+  setStackPointerRegisterToSaveRestore(isPPC64 ? PPC::X1 : PPC::R1);
-    setStackPointerRegisterToSaveRestore(PPC::X1);
-    setExceptionPointerRegister(PPC::X3);
-    setExceptionSelectorRegister(PPC::X4);
-  } else {
-    setStackPointerRegisterToSaveRestore(PPC::R1);
-    setExceptionPointerRegister(PPC::R3);
-    setExceptionSelectorRegister(PPC::R4);
-  }
 
   // We have target-specific dag combine patterns for the following nodes:
   setTargetDAGCombine(ISD::SINT_TO_FP);
@@ -11532,6 +11524,16 @@ PPCTargetLowering::getScratchRegisters(CallingConv::ID) const {
   return ScratchRegs;
 }
 
+unsigned PPCTargetLowering::getExceptionPointerRegister(
+    const Constant *PersonalityFn) const {
+  return Subtarget.isPPC64() ? PPC::X3 : PPC::R3;
+}
+
+unsigned PPCTargetLowering::getExceptionSelectorRegister(
+    const Constant *PersonalityFn) const {
+  return Subtarget.isPPC64() ? PPC::X4 : PPC::R4;
+}
+
 bool
 PPCTargetLowering::shouldExpandBuildVectorWithShuffles(
                      EVT VT , unsigned DefinedValues) const {

lib/Target/PowerPC/PPCISelLowering.h

@@ -655,8 +655,17 @@ namespace llvm {
       return Ty->isArrayTy();
     }
 
-  private:
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override;
+
+  private:
     struct ReuseLoadInfo {
       SDValue Ptr;
       SDValue Chain;

lib/Target/Sparc/SparcISelLowering.cpp

@@ -1674,9 +1674,6 @@ SparcTargetLowering::SparcTargetLowering(TargetMachine &TM,
   setOperationAction(ISD::STACKRESTORE      , MVT::Other, Expand);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32  , Custom);
 
-  setExceptionPointerRegister(SP::I0);
-  setExceptionSelectorRegister(SP::I1);
-
   setStackPointerRegisterToSaveRestore(SP::O6);
 
   setOperationAction(ISD::CTPOP, MVT::i32,

lib/Target/Sparc/SparcISelLowering.h

@@ -89,6 +89,20 @@ namespace llvm {
       return MVT::i32;
     }
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+      return SP::I0;
+    }
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+      return SP::I1;
+    }
+
     /// getSetCCResultType - Return the ISD::SETCC ValueType
     EVT getSetCCResultType(const DataLayout &DL, LLVMContext &Context,
                            EVT VT) const override;

lib/Target/SystemZ/SystemZISelLowering.cpp

@@ -114,8 +114,6 @@ SystemZTargetLowering::SystemZTargetLowering(const TargetMachine &TM,
   computeRegisterProperties(Subtarget.getRegisterInfo());
 
   // Set up special registers.
-  setExceptionPointerRegister(SystemZ::R6D);
-  setExceptionSelectorRegister(SystemZ::R7D);
   setStackPointerRegisterToSaveRestore(SystemZ::R15D);
 
   // TODO: It may be better to default to latency-oriented scheduling, however

lib/Target/SystemZ/SystemZISelLowering.h

@@ -409,6 +409,20 @@ public:
     return TargetLowering::getInlineAsmMemConstraint(ConstraintCode);
   }
 
+  /// If a physical register, this returns the register that receives the
+  /// exception address on entry to an EH pad.
+  unsigned
+  getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+    return SystemZ::R6D;
+  }
+
+  /// If a physical register, this returns the register that receives the
+  /// exception typeid on entry to a landing pad.
+  unsigned
+  getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+    return SystemZ::R7D;
+  }
+
   MachineBasicBlock *EmitInstrWithCustomInserter(MachineInstr *MI,
                                                  MachineBasicBlock *BB) const
     override;

lib/Target/X86/X86ISelLowering.cpp

@@ -25,6 +25,7 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
+#include "llvm/Analysis/LibCallSemantics.h"
 #include "llvm/CodeGen/IntrinsicLowering.h"
 #include "llvm/CodeGen/MachineFrameInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
@@ -476,13 +477,6 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
     setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
   }
 
-  if (Subtarget->isTarget64BitLP64()) {
-    setExceptionPointerRegister(X86::RAX);
-    setExceptionSelectorRegister(X86::RDX);
-  } else {
-    setExceptionPointerRegister(X86::EAX);
-    setExceptionSelectorRegister(X86::EDX);
-  }
   setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
   setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i64, Custom);
 
@@ -17246,6 +17240,21 @@ SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,
   return DAG.getIntPtrConstant(2 * RegInfo->getSlotSize(), SDLoc(Op));
 }
 
+unsigned X86TargetLowering::getExceptionPointerRegister(
+    const Constant *PersonalityFn) const {
+  if (classifyEHPersonality(PersonalityFn) == EHPersonality::CoreCLR)
+    return Subtarget->isTarget64BitLP64() ? X86::RDX : X86::EDX;
+
+  return Subtarget->isTarget64BitLP64() ? X86::RAX : X86::EAX;
+}
+
+unsigned X86TargetLowering::getExceptionSelectorRegister(
+    const Constant *PersonalityFn) const {
+  // Funclet personalities don't use selectors (the runtime does the selection).
+  assert(!isFuncletEHPersonality(classifyEHPersonality(PersonalityFn)));
+  return Subtarget->isTarget64BitLP64() ? X86::RDX : X86::EDX;
+}
+
 SDValue X86TargetLowering::LowerEH_RETURN(SDValue Op, SelectionDAG &DAG) const {
   SDValue Chain     = Op.getOperand(0);
   SDValue Offset    = Op.getOperand(1);

lib/Target/X86/X86ISelLowering.h

@@ -889,6 +889,16 @@ namespace llvm {
     unsigned getRegisterByName(const char* RegName, EVT VT,
                                SelectionDAG &DAG) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override;
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override;
+
     /// This method returns a target specific FastISel object,
     /// or null if the target does not support "fast" ISel.
     FastISel *createFastISel(FunctionLoweringInfo &funcInfo,

lib/Target/XCore/XCoreFrameLowering.cpp

@@ -160,19 +160,19 @@ static void GetSpillList(SmallVectorImpl<StackSlotInfo> &SpillList,
 /// As offsets are negative, the largest offsets will be first.
 static void GetEHSpillList(SmallVectorImpl<StackSlotInfo> &SpillList,
                            MachineFrameInfo *MFI, XCoreFunctionInfo *XFI,
+                           const Constant *PersonalityFn,
                            const TargetLowering *TL) {
   assert(XFI->hasEHSpillSlot() && "There are no EH register spill slots");
   const int *EHSlot = XFI->getEHSpillSlot();
-  SpillList.push_back(StackSlotInfo(EHSlot[0],
+  SpillList.push_back(
-                                    MFI->getObjectOffset(EHSlot[0]),
+      StackSlotInfo(EHSlot[0], MFI->getObjectOffset(EHSlot[0]),
-                                    TL->getExceptionPointerRegister()));
+                    TL->getExceptionPointerRegister(PersonalityFn)));
-  SpillList.push_back(StackSlotInfo(EHSlot[0],
+  SpillList.push_back(
-                                    MFI->getObjectOffset(EHSlot[1]),
+      StackSlotInfo(EHSlot[0], MFI->getObjectOffset(EHSlot[1]),
-                                    TL->getExceptionSelectorRegister()));
+                    TL->getExceptionSelectorRegister(PersonalityFn)));
   std::sort(SpillList.begin(), SpillList.end(), CompareSSIOffset);
 }
 
-
 static MachineMemOperand *
 getFrameIndexMMO(MachineBasicBlock &MBB, int FrameIndex, unsigned flags) {
   MachineFunction *MF = MBB.getParent();
@@ -322,8 +322,11 @@ void XCoreFrameLowering::emitPrologue(MachineFunction &MF,
     if (XFI->hasEHSpillSlot()) {
       // The unwinder requires stack slot & CFI offsets for the exception info.
       // We do not save/spill these registers.
+      const Function *Fn = MF.getFunction();
+      const Constant *PersonalityFn =
+          Fn->hasPersonalityFn() ? Fn->getPersonalityFn() : nullptr;
       SmallVector<StackSlotInfo, 2> SpillList;
-      GetEHSpillList(SpillList, MFI, XFI,
+      GetEHSpillList(SpillList, MFI, XFI, PersonalityFn,
                      MF.getSubtarget().getTargetLowering());
       assert(SpillList.size()==2 && "Unexpected SpillList size");
       EmitCfiOffset(MBB, MBBI, dl, TII, MMI,
@@ -354,8 +357,12 @@ void XCoreFrameLowering::emitEpilogue(MachineFunction &MF,
   if (RetOpcode == XCore::EH_RETURN) {
     // 'Restore' the exception info the unwinder has placed into the stack
     // slots.
+    const Function *Fn = MF.getFunction();
+    const Constant *PersonalityFn =
+        Fn->hasPersonalityFn() ? Fn->getPersonalityFn() : nullptr;
     SmallVector<StackSlotInfo, 2> SpillList;
-    GetEHSpillList(SpillList, MFI, XFI, MF.getSubtarget().getTargetLowering());
+    GetEHSpillList(SpillList, MFI, XFI, PersonalityFn,
+                   MF.getSubtarget().getTargetLowering());
     RestoreSpillList(MBB, MBBI, dl, TII, RemainingAdj, SpillList);
 
     // Return to the landing pad.

lib/Target/XCore/XCoreISelLowering.cpp

@@ -151,8 +151,6 @@ XCoreTargetLowering::XCoreTargetLowering(const TargetMachine &TM,
 
   // Exception handling
   setOperationAction(ISD::EH_RETURN, MVT::Other, Custom);
-  setExceptionPointerRegister(XCore::R0);
-  setExceptionSelectorRegister(XCore::R1);
   setOperationAction(ISD::FRAME_TO_ARGS_OFFSET, MVT::i32, Custom);
 
   // Atomic operations

lib/Target/XCore/XCoreISelLowering.h

@@ -125,6 +125,20 @@ namespace llvm {
     bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM,
                                Type *Ty, unsigned AS) const override;
 
+    /// If a physical register, this returns the register that receives the
+    /// exception address on entry to an EH pad.
+    unsigned
+    getExceptionPointerRegister(const Constant *PersonalityFn) const override {
+      return XCore::R0;
+    }
+
+    /// If a physical register, this returns the register that receives the
+    /// exception typeid on entry to a landing pad.
+    unsigned
+    getExceptionSelectorRegister(const Constant *PersonalityFn) const override {
+      return XCore::R1;
+    }
+
   private:
     const TargetMachine &TM;
     const XCoreSubtarget &Subtarget;

test/CodeGen/WinEH/wineh-coreclr.ll

@@ -2,6 +2,8 @@
 
 declare void @ProcessCLRException()
 declare void @f(i32)
+declare void @g(i8 addrspace(1)*)
+declare i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token)
 
 ; Simplified IR for pseudo-C# like the following:
 ; void test1() {
@@ -53,6 +55,11 @@ catch1.body:
 ; CHECK: leaq {{[0-9]+}}(%rcx), %rbp
 ;                        ^ establisher frame pointer passed in rcx
 ; CHECK: .seh_endprologue
+; CHECK: movq %rdx, %rcx
+;             ^ exception pointer passed in rdx
+; CHECK-NEXT: callq g
+  %exn1 = call i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token %catch1)
+  call void @g(i8 addrspace(1)* %exn1)
 ; CHECK: [[L_before_f3:.+]]:
 ; CHECK-NEXT: movl $3, %ecx
 ; CHECK-NEXT: callq f
@@ -69,6 +76,11 @@ catch2.body:
 ; CHECK: leaq {{[0-9]+}}(%rcx), %rbp
 ;                        ^ establisher frame pointer passed in rcx
 ; CHECK: .seh_endprologue
+; CHECK: movq %rdx, %rcx
+;             ^ exception pointer passed in rdx
+; CHECK-NEXT: callq g
+  %exn2 = call i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token %catch2)
+  call void @g(i8 addrspace(1)* %exn2)
 ; CHECK: [[L_before_f4:.+]]:
 ; CHECK-NEXT: movl $4, %ecx
 ; CHECK-NEXT: callq f

test/CodeGen/WinEH/wineh-exceptionpointer.ll

@@ -17,7 +17,7 @@ catch.pad:
 catch.body:
   %exn = call i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token %catch)
   %cast_exn = bitcast i8 addrspace(1)* %exn to i32 addrspace(1)*
-  ; CHECK: movq %rax, %rcx
+  ; CHECK: movq %rdx, %rcx
   ; CHECK-NEXT: callq g
   call void @g(i32 addrspace(1)* %cast_exn)
   catchret %catch to label %exit