[llvm] r229735 - dos2unix the WinEH file and tests

Reid Kleckner reid at kleckner.net
Wed Feb 18 11:52:47 PST 2015


Author: rnk
Date: Wed Feb 18 13:52:46 2015
New Revision: 229735

URL: http://llvm.org/viewvc/llvm-project?rev=229735&view=rev
Log:
dos2unix the WinEH file and tests

Modified:
    llvm/trunk/lib/CodeGen/WinEHPrepare.cpp
    llvm/trunk/test/CodeGen/X86/cppeh-catch-all.ll
    llvm/trunk/test/CodeGen/X86/cppeh-catch-scalar.ll

Modified: llvm/trunk/lib/CodeGen/WinEHPrepare.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/WinEHPrepare.cpp?rev=229735&r1=229734&r2=229735&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/WinEHPrepare.cpp (original)
+++ llvm/trunk/lib/CodeGen/WinEHPrepare.cpp Wed Feb 18 13:52:46 2015
@@ -1,391 +1,391 @@
-//===-- WinEHPrepare - Prepare exception handling for code generation ---===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This pass lowers LLVM IR exception handling into something closer to what the
-// backend wants. It snifs the personality function to see which kind of
-// preparation is necessary. If the personality function uses the Itanium LSDA,
-// this pass delegates to the DWARF EH preparation pass.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/Analysis/LibCallSemantics.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/IRBuilder.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/PatternMatch.h"
-#include "llvm/Pass.h"
-#include "llvm/Transforms/Utils/Cloning.h"
-#include "llvm/Transforms/Utils/Local.h"
-#include <memory>
-
-using namespace llvm;
-using namespace llvm::PatternMatch;
-
-#define DEBUG_TYPE "winehprepare"
-
-namespace {
-class WinEHPrepare : public FunctionPass {
-  std::unique_ptr<FunctionPass> DwarfPrepare;
-
-public:
-  static char ID; // Pass identification, replacement for typeid.
-  WinEHPrepare(const TargetMachine *TM = nullptr)
-      : FunctionPass(ID), DwarfPrepare(createDwarfEHPass(TM)) {}
-
-  bool runOnFunction(Function &Fn) override;
-
-  bool doFinalization(Module &M) override;
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override;
-
-  const char *getPassName() const override {
-    return "Windows exception handling preparation";
-  }
-
-private:
-  bool prepareCPPEHHandlers(Function &F,
-                            SmallVectorImpl<LandingPadInst *> &LPads);
-  bool outlineCatchHandler(Function *SrcFn, Constant *SelectorType,
-                           LandingPadInst *LPad, StructType *EHDataStructTy);
-};
-
-class WinEHCatchDirector : public CloningDirector {
-public:
-  WinEHCatchDirector(LandingPadInst *LPI, Value *Selector, Value *EHObj)
-      : LPI(LPI), CurrentSelector(Selector->stripPointerCasts()), EHObj(EHObj),
-        SelectorIDType(Type::getInt32Ty(LPI->getContext())),
-        Int8PtrType(Type::getInt8PtrTy(LPI->getContext())) {}
-  virtual ~WinEHCatchDirector() {}
-
-  CloningAction handleInstruction(ValueToValueMapTy &VMap,
-                                  const Instruction *Inst,
-                                  BasicBlock *NewBB) override;
-
-private:
-  LandingPadInst *LPI;
-  Value *CurrentSelector;
-  Value *EHObj;
-  Type *SelectorIDType;
-  Type *Int8PtrType;
-
-  const Value *ExtractedEHPtr;
-  const Value *ExtractedSelector;
-  const Value *EHPtrStoreAddr;
-  const Value *SelectorStoreAddr;
-};
-} // end anonymous namespace
-
-char WinEHPrepare::ID = 0;
-INITIALIZE_TM_PASS(WinEHPrepare, "winehprepare", "Prepare Windows exceptions",
-                   false, false)
-
-FunctionPass *llvm::createWinEHPass(const TargetMachine *TM) {
-  return new WinEHPrepare(TM);
-}
-
-static bool isMSVCPersonality(EHPersonality Pers) {
-  return Pers == EHPersonality::MSVC_Win64SEH ||
-         Pers == EHPersonality::MSVC_CXX;
-}
-
-bool WinEHPrepare::runOnFunction(Function &Fn) {
-  SmallVector<LandingPadInst *, 4> LPads;
-  SmallVector<ResumeInst *, 4> Resumes;
-  for (BasicBlock &BB : Fn) {
-    if (auto *LP = BB.getLandingPadInst())
-      LPads.push_back(LP);
-    if (auto *Resume = dyn_cast<ResumeInst>(BB.getTerminator()))
-      Resumes.push_back(Resume);
-  }
-
-  // No need to prepare functions that lack landing pads.
-  if (LPads.empty())
-    return false;
-
-  // Classify the personality to see what kind of preparation we need.
-  EHPersonality Pers = classifyEHPersonality(LPads.back()->getPersonalityFn());
-
-  // Delegate through to the DWARF pass if this is unrecognized.
-  if (!isMSVCPersonality(Pers))
-    return DwarfPrepare->runOnFunction(Fn);
-
-  // FIXME: This only returns true if the C++ EH handlers were outlined.
-  //        When that code is complete, it should always return whatever
-  //        prepareCPPEHHandlers returns.
-  if (Pers == EHPersonality::MSVC_CXX && prepareCPPEHHandlers(Fn, LPads))
-    return true;
-
-  // FIXME: SEH Cleanups are unimplemented. Replace them with unreachable.
-  if (Resumes.empty())
-    return false;
-
-  for (ResumeInst *Resume : Resumes) {
-    IRBuilder<>(Resume).CreateUnreachable();
-    Resume->eraseFromParent();
-  }
-
-  return true;
-}
-
-bool WinEHPrepare::doFinalization(Module &M) {
-  return DwarfPrepare->doFinalization(M);
-}
-
-void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const {
-  DwarfPrepare->getAnalysisUsage(AU);
-}
-
-bool WinEHPrepare::prepareCPPEHHandlers(
-    Function &F, SmallVectorImpl<LandingPadInst *> &LPads) {
-  // FIXME: Find all frame variable references in the handlers
-  //        to populate the structure elements.
-  SmallVector<Type *, 2> AllocStructTys;
-  AllocStructTys.push_back(Type::getInt32Ty(F.getContext()));   // EH state
-  AllocStructTys.push_back(Type::getInt8PtrTy(F.getContext())); // EH object
-  StructType *EHDataStructTy =
-      StructType::create(F.getContext(), AllocStructTys, 
-                         "struct." + F.getName().str() + ".ehdata");
-  bool HandlersOutlined = false;
-
-  for (LandingPadInst *LPad : LPads) {
-    // Look for evidence that this landingpad has already been processed.
-    bool LPadHasActionList = false;
-    BasicBlock *LPadBB = LPad->getParent();
-    for (Instruction &Inst : LPadBB->getInstList()) {
-      // FIXME: Make this an intrinsic.
-      if (auto *Call = dyn_cast<CallInst>(&Inst))
-        if (Call->getCalledFunction()->getName() == "llvm.eh.actions") {
-          LPadHasActionList = true;
-          break;
-        }
-    }
-
-    // If we've already outlined the handlers for this landingpad,
-    // there's nothing more to do here.
-    if (LPadHasActionList)
-      continue;
-
-    for (unsigned Idx = 0, NumClauses = LPad->getNumClauses(); Idx < NumClauses;
-         ++Idx) {
-      if (LPad->isCatch(Idx))
-        HandlersOutlined =
-            outlineCatchHandler(&F, LPad->getClause(Idx), LPad, EHDataStructTy);
-    } // End for each clause
-  }   // End for each landingpad
-
-  return HandlersOutlined;
-}
-
-bool WinEHPrepare::outlineCatchHandler(Function *SrcFn, Constant *SelectorType,
-                                       LandingPadInst *LPad,
-                                       StructType *EHDataStructTy) {
-  Module *M = SrcFn->getParent();
-  LLVMContext &Context = M->getContext();
-
-  // Create a new function to receive the handler contents.
-  Type *Int8PtrType = Type::getInt8PtrTy(Context);
-  std::vector<Type *> ArgTys;
-  ArgTys.push_back(Int8PtrType);
-  ArgTys.push_back(Int8PtrType);
-  FunctionType *FnType = FunctionType::get(Int8PtrType, ArgTys, false);
-  Function *CatchHandler = Function::Create(
-      FnType, GlobalVariable::ExternalLinkage, SrcFn->getName() + ".catch", M);
-
-  // Generate a standard prolog to setup the frame recovery structure.
-  IRBuilder<> Builder(Context);
-  BasicBlock *Entry = BasicBlock::Create(Context, "catch.entry");
-  CatchHandler->getBasicBlockList().push_front(Entry);
-  Builder.SetInsertPoint(Entry);
-  Builder.SetCurrentDebugLocation(LPad->getDebugLoc());
-
-  // The outlined handler will be called with the parent's frame pointer as
-  // its second argument. To enable the handler to access variables from
-  // the parent frame, we use that pointer to get locate a special block
-  // of memory that was allocated using llvm.eh.allocateframe for this
-  // purpose.  During the outlining process we will determine which frame
-  // variables are used in handlers and create a structure that maps these
-  // variables into the frame allocation block.
-  //
-  // The frame allocation block also contains an exception state variable
-  // used by the runtime and a pointer to the exception object pointer
-  // which will be filled in by the runtime for use in the handler.
-  Function *RecoverFrameFn =
-      Intrinsic::getDeclaration(M, Intrinsic::framerecover);
-  Value *RecoverArgs[] = {Builder.CreateBitCast(SrcFn, Int8PtrType, ""),
-                          &(CatchHandler->getArgumentList().back())};
-  CallInst *EHAlloc =
-      Builder.CreateCall(RecoverFrameFn, RecoverArgs, "eh.alloc");
-  Value *EHData =
-      Builder.CreateBitCast(EHAlloc, EHDataStructTy->getPointerTo(), "ehdata");
-  Value *EHObjPtr =
-      Builder.CreateConstInBoundsGEP2_32(EHData, 0, 1, "eh.obj.ptr");
-
-  // This will give us a raw pointer to the exception object, which
-  // corresponds to the formal parameter of the catch statement.  If the
-  // handler uses this object, we will generate code during the outlining
-  // process to cast the pointer to the appropriate type and deference it
-  // as necessary.  The un-outlined landing pad code represents the
-  // exception object as the result of the llvm.eh.begincatch call.
-  Value *EHObj = Builder.CreateLoad(EHObjPtr, false, "eh.obj");
-
-  ValueToValueMapTy VMap;
-
-  // FIXME: Map other values referenced in the filter handler.
-
-  WinEHCatchDirector Director(LPad, SelectorType, EHObj);
-
-  SmallVector<ReturnInst *, 8> Returns;
-  ClonedCodeInfo InlinedFunctionInfo;
-
-  BasicBlock::iterator II = LPad;
-
-  CloneAndPruneIntoFromInst(CatchHandler, SrcFn, ++II, VMap,
-                            /*ModuleLevelChanges=*/false, Returns, "",
-                            &InlinedFunctionInfo,
-                            SrcFn->getParent()->getDataLayout(), &Director);
-
-  // Move all the instructions in the first cloned block into our entry block.
-  BasicBlock *FirstClonedBB = std::next(Function::iterator(Entry));
-  Entry->getInstList().splice(Entry->end(), FirstClonedBB->getInstList());
-  FirstClonedBB->eraseFromParent();
-
-  return true;
-}
-
-CloningDirector::CloningAction WinEHCatchDirector::handleInstruction(
-    ValueToValueMapTy &VMap, const Instruction *Inst, BasicBlock *NewBB) {
-  // Intercept instructions which extract values from the landing pad aggregate.
-  if (auto *Extract = dyn_cast<ExtractValueInst>(Inst)) {
-    if (Extract->getAggregateOperand() == LPI) {
-      assert(Extract->getNumIndices() == 1 &&
-             "Unexpected operation: extracting both landing pad values");
-      assert((*(Extract->idx_begin()) == 0 || *(Extract->idx_begin()) == 1) &&
-             "Unexpected operation: extracting an unknown landing pad element");
-
-      if (*(Extract->idx_begin()) == 0) {
-        // Element 0 doesn't directly corresponds to anything in the WinEH scheme.
-        // It will be stored to a memory location, then later loaded and finally
-        // the loaded value will be used as the argument to an llvm.eh.begincatch
-        // call.  We're tracking it here so that we can skip the store and load.
-        ExtractedEHPtr = Inst;
-      } else {
-        // Element 1 corresponds to the filter selector.  We'll map it to 1 for
-        // matching purposes, but it will also probably be stored to memory and
-        // reloaded, so we need to track the instuction so that we can map the
-        // loaded value too.
-        VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
-        ExtractedSelector = Inst;
-      }
-
-      // Tell the caller not to clone this instruction.
-      return CloningDirector::SkipInstruction;
-    }
-    // Other extract value instructions just get cloned.
-    return CloningDirector::CloneInstruction;
-  }
-
-  if (auto *Store = dyn_cast<StoreInst>(Inst)) {
-    // Look for and suppress stores of the extracted landingpad values.
-    const Value *StoredValue = Store->getValueOperand();
-    if (StoredValue == ExtractedEHPtr) {
-      EHPtrStoreAddr = Store->getPointerOperand();
-      return CloningDirector::SkipInstruction;
-    }
-    if (StoredValue == ExtractedSelector) {
-      SelectorStoreAddr = Store->getPointerOperand();
-      return CloningDirector::SkipInstruction;
-    }
-
-    // Any other store just gets cloned.
-    return CloningDirector::CloneInstruction;
-  }
-
-  if (auto *Load = dyn_cast<LoadInst>(Inst)) {
-    // Look for loads of (previously suppressed) landingpad values.
-    // The EHPtr load can be ignored (it should only be used as
-    // an argument to llvm.eh.begincatch), but the selector value
-    // needs to be mapped to a constant value of 1 to be used to
-    // simplify the branching to always flow to the current handler.
-    const Value *LoadAddr = Load->getPointerOperand();
-    if (LoadAddr == EHPtrStoreAddr) {
-      VMap[Inst] = UndefValue::get(Int8PtrType);
-      return CloningDirector::SkipInstruction;
-    }
-    if (LoadAddr == SelectorStoreAddr) {
-      VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
-      return CloningDirector::SkipInstruction;
-    }
-
-    // Any other loads just get cloned.
-    return CloningDirector::CloneInstruction;
-  }
-
-  if (match(Inst, m_Intrinsic<Intrinsic::eh_begincatch>())) {
-    // The argument to the call is some form of the first element of the
-    // landingpad aggregate value, but that doesn't matter.  It isn't used
-    // here.
-    // The return value of this instruction, however, is used to access the
-    // EH object pointer.  We have generated an instruction to get that value
-    // from the EH alloc block, so we can just map to that here.
-    VMap[Inst] = EHObj;
-    return CloningDirector::SkipInstruction;
-  }
-  if (match(Inst, m_Intrinsic<Intrinsic::eh_endcatch>())) {
-    auto *IntrinCall = dyn_cast<IntrinsicInst>(Inst);
-    // It might be interesting to track whether or not we are inside a catch
-    // function, but that might make the algorithm more brittle than it needs
-    // to be.
-
-    // The end catch call can occur in one of two places: either in a
-    // landingpad
-    // block that is part of the catch handlers exception mechanism, or at the
-    // end of the catch block.  If it occurs in a landing pad, we must skip it
-    // and continue so that the landing pad gets cloned.
-    // FIXME: This case isn't fully supported yet and shouldn't turn up in any
-    //        of the test cases until it is.
-    if (IntrinCall->getParent()->isLandingPad())
-      return CloningDirector::SkipInstruction;
-
-    // If an end catch occurs anywhere else the next instruction should be an
-    // unconditional branch instruction that we want to replace with a return
-    // to the the address of the branch target.
-    const BasicBlock *EndCatchBB = IntrinCall->getParent();
-    const TerminatorInst *Terminator = EndCatchBB->getTerminator();
-    const BranchInst *Branch = dyn_cast<BranchInst>(Terminator);
-    assert(Branch && Branch->isUnconditional());
-    assert(std::next(BasicBlock::const_iterator(IntrinCall)) ==
-            BasicBlock::const_iterator(Branch));
-
-    ReturnInst::Create(NewBB->getContext(),
-                        BlockAddress::get(Branch->getSuccessor(0)), NewBB);
-
-    // We just added a terminator to the cloned block.
-    // Tell the caller to stop processing the current basic block so that
-    // the branch instruction will be skipped.
-    return CloningDirector::StopCloningBB;
-  }
-  if (match(Inst, m_Intrinsic<Intrinsic::eh_typeid_for>())) {
-    auto *IntrinCall = dyn_cast<IntrinsicInst>(Inst);
-    Value *Selector = IntrinCall->getArgOperand(0)->stripPointerCasts();
-    // This causes a replacement that will collapse the landing pad CFG based
-    // on the filter function we intend to match.
-    if (Selector == CurrentSelector)
-      VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
-    else
-      VMap[Inst] = ConstantInt::get(SelectorIDType, 0);
-    // Tell the caller not to clone this instruction.
-    return CloningDirector::SkipInstruction;
-  }
-
-  // Continue with the default cloning behavior.
-  return CloningDirector::CloneInstruction;
-}
+//===-- WinEHPrepare - Prepare exception handling for code generation ---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass lowers LLVM IR exception handling into something closer to what the
+// backend wants. It snifs the personality function to see which kind of
+// preparation is necessary. If the personality function uses the Itanium LSDA,
+// this pass delegates to the DWARF EH preparation pass.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/Analysis/LibCallSemantics.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/PatternMatch.h"
+#include "llvm/Pass.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+#include "llvm/Transforms/Utils/Local.h"
+#include <memory>
+
+using namespace llvm;
+using namespace llvm::PatternMatch;
+
+#define DEBUG_TYPE "winehprepare"
+
+namespace {
+class WinEHPrepare : public FunctionPass {
+  std::unique_ptr<FunctionPass> DwarfPrepare;
+
+public:
+  static char ID; // Pass identification, replacement for typeid.
+  WinEHPrepare(const TargetMachine *TM = nullptr)
+      : FunctionPass(ID), DwarfPrepare(createDwarfEHPass(TM)) {}
+
+  bool runOnFunction(Function &Fn) override;
+
+  bool doFinalization(Module &M) override;
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+
+  const char *getPassName() const override {
+    return "Windows exception handling preparation";
+  }
+
+private:
+  bool prepareCPPEHHandlers(Function &F,
+                            SmallVectorImpl<LandingPadInst *> &LPads);
+  bool outlineCatchHandler(Function *SrcFn, Constant *SelectorType,
+                           LandingPadInst *LPad, StructType *EHDataStructTy);
+};
+
+class WinEHCatchDirector : public CloningDirector {
+public:
+  WinEHCatchDirector(LandingPadInst *LPI, Value *Selector, Value *EHObj)
+      : LPI(LPI), CurrentSelector(Selector->stripPointerCasts()), EHObj(EHObj),
+        SelectorIDType(Type::getInt32Ty(LPI->getContext())),
+        Int8PtrType(Type::getInt8PtrTy(LPI->getContext())) {}
+  virtual ~WinEHCatchDirector() {}
+
+  CloningAction handleInstruction(ValueToValueMapTy &VMap,
+                                  const Instruction *Inst,
+                                  BasicBlock *NewBB) override;
+
+private:
+  LandingPadInst *LPI;
+  Value *CurrentSelector;
+  Value *EHObj;
+  Type *SelectorIDType;
+  Type *Int8PtrType;
+
+  const Value *ExtractedEHPtr;
+  const Value *ExtractedSelector;
+  const Value *EHPtrStoreAddr;
+  const Value *SelectorStoreAddr;
+};
+} // end anonymous namespace
+
+char WinEHPrepare::ID = 0;
+INITIALIZE_TM_PASS(WinEHPrepare, "winehprepare", "Prepare Windows exceptions",
+                   false, false)
+
+FunctionPass *llvm::createWinEHPass(const TargetMachine *TM) {
+  return new WinEHPrepare(TM);
+}
+
+static bool isMSVCPersonality(EHPersonality Pers) {
+  return Pers == EHPersonality::MSVC_Win64SEH ||
+         Pers == EHPersonality::MSVC_CXX;
+}
+
+bool WinEHPrepare::runOnFunction(Function &Fn) {
+  SmallVector<LandingPadInst *, 4> LPads;
+  SmallVector<ResumeInst *, 4> Resumes;
+  for (BasicBlock &BB : Fn) {
+    if (auto *LP = BB.getLandingPadInst())
+      LPads.push_back(LP);
+    if (auto *Resume = dyn_cast<ResumeInst>(BB.getTerminator()))
+      Resumes.push_back(Resume);
+  }
+
+  // No need to prepare functions that lack landing pads.
+  if (LPads.empty())
+    return false;
+
+  // Classify the personality to see what kind of preparation we need.
+  EHPersonality Pers = classifyEHPersonality(LPads.back()->getPersonalityFn());
+
+  // Delegate through to the DWARF pass if this is unrecognized.
+  if (!isMSVCPersonality(Pers))
+    return DwarfPrepare->runOnFunction(Fn);
+
+  // FIXME: This only returns true if the C++ EH handlers were outlined.
+  //        When that code is complete, it should always return whatever
+  //        prepareCPPEHHandlers returns.
+  if (Pers == EHPersonality::MSVC_CXX && prepareCPPEHHandlers(Fn, LPads))
+    return true;
+
+  // FIXME: SEH Cleanups are unimplemented. Replace them with unreachable.
+  if (Resumes.empty())
+    return false;
+
+  for (ResumeInst *Resume : Resumes) {
+    IRBuilder<>(Resume).CreateUnreachable();
+    Resume->eraseFromParent();
+  }
+
+  return true;
+}
+
+bool WinEHPrepare::doFinalization(Module &M) {
+  return DwarfPrepare->doFinalization(M);
+}
+
+void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const {
+  DwarfPrepare->getAnalysisUsage(AU);
+}
+
+bool WinEHPrepare::prepareCPPEHHandlers(
+    Function &F, SmallVectorImpl<LandingPadInst *> &LPads) {
+  // FIXME: Find all frame variable references in the handlers
+  //        to populate the structure elements.
+  SmallVector<Type *, 2> AllocStructTys;
+  AllocStructTys.push_back(Type::getInt32Ty(F.getContext()));   // EH state
+  AllocStructTys.push_back(Type::getInt8PtrTy(F.getContext())); // EH object
+  StructType *EHDataStructTy =
+      StructType::create(F.getContext(), AllocStructTys, 
+                         "struct." + F.getName().str() + ".ehdata");
+  bool HandlersOutlined = false;
+
+  for (LandingPadInst *LPad : LPads) {
+    // Look for evidence that this landingpad has already been processed.
+    bool LPadHasActionList = false;
+    BasicBlock *LPadBB = LPad->getParent();
+    for (Instruction &Inst : LPadBB->getInstList()) {
+      // FIXME: Make this an intrinsic.
+      if (auto *Call = dyn_cast<CallInst>(&Inst))
+        if (Call->getCalledFunction()->getName() == "llvm.eh.actions") {
+          LPadHasActionList = true;
+          break;
+        }
+    }
+
+    // If we've already outlined the handlers for this landingpad,
+    // there's nothing more to do here.
+    if (LPadHasActionList)
+      continue;
+
+    for (unsigned Idx = 0, NumClauses = LPad->getNumClauses(); Idx < NumClauses;
+         ++Idx) {
+      if (LPad->isCatch(Idx))
+        HandlersOutlined =
+            outlineCatchHandler(&F, LPad->getClause(Idx), LPad, EHDataStructTy);
+    } // End for each clause
+  }   // End for each landingpad
+
+  return HandlersOutlined;
+}
+
+bool WinEHPrepare::outlineCatchHandler(Function *SrcFn, Constant *SelectorType,
+                                       LandingPadInst *LPad,
+                                       StructType *EHDataStructTy) {
+  Module *M = SrcFn->getParent();
+  LLVMContext &Context = M->getContext();
+
+  // Create a new function to receive the handler contents.
+  Type *Int8PtrType = Type::getInt8PtrTy(Context);
+  std::vector<Type *> ArgTys;
+  ArgTys.push_back(Int8PtrType);
+  ArgTys.push_back(Int8PtrType);
+  FunctionType *FnType = FunctionType::get(Int8PtrType, ArgTys, false);
+  Function *CatchHandler = Function::Create(
+      FnType, GlobalVariable::ExternalLinkage, SrcFn->getName() + ".catch", M);
+
+  // Generate a standard prolog to setup the frame recovery structure.
+  IRBuilder<> Builder(Context);
+  BasicBlock *Entry = BasicBlock::Create(Context, "catch.entry");
+  CatchHandler->getBasicBlockList().push_front(Entry);
+  Builder.SetInsertPoint(Entry);
+  Builder.SetCurrentDebugLocation(LPad->getDebugLoc());
+
+  // The outlined handler will be called with the parent's frame pointer as
+  // its second argument. To enable the handler to access variables from
+  // the parent frame, we use that pointer to get locate a special block
+  // of memory that was allocated using llvm.eh.allocateframe for this
+  // purpose.  During the outlining process we will determine which frame
+  // variables are used in handlers and create a structure that maps these
+  // variables into the frame allocation block.
+  //
+  // The frame allocation block also contains an exception state variable
+  // used by the runtime and a pointer to the exception object pointer
+  // which will be filled in by the runtime for use in the handler.
+  Function *RecoverFrameFn =
+      Intrinsic::getDeclaration(M, Intrinsic::framerecover);
+  Value *RecoverArgs[] = {Builder.CreateBitCast(SrcFn, Int8PtrType, ""),
+                          &(CatchHandler->getArgumentList().back())};
+  CallInst *EHAlloc =
+      Builder.CreateCall(RecoverFrameFn, RecoverArgs, "eh.alloc");
+  Value *EHData =
+      Builder.CreateBitCast(EHAlloc, EHDataStructTy->getPointerTo(), "ehdata");
+  Value *EHObjPtr =
+      Builder.CreateConstInBoundsGEP2_32(EHData, 0, 1, "eh.obj.ptr");
+
+  // This will give us a raw pointer to the exception object, which
+  // corresponds to the formal parameter of the catch statement.  If the
+  // handler uses this object, we will generate code during the outlining
+  // process to cast the pointer to the appropriate type and deference it
+  // as necessary.  The un-outlined landing pad code represents the
+  // exception object as the result of the llvm.eh.begincatch call.
+  Value *EHObj = Builder.CreateLoad(EHObjPtr, false, "eh.obj");
+
+  ValueToValueMapTy VMap;
+
+  // FIXME: Map other values referenced in the filter handler.
+
+  WinEHCatchDirector Director(LPad, SelectorType, EHObj);
+
+  SmallVector<ReturnInst *, 8> Returns;
+  ClonedCodeInfo InlinedFunctionInfo;
+
+  BasicBlock::iterator II = LPad;
+
+  CloneAndPruneIntoFromInst(CatchHandler, SrcFn, ++II, VMap,
+                            /*ModuleLevelChanges=*/false, Returns, "",
+                            &InlinedFunctionInfo,
+                            SrcFn->getParent()->getDataLayout(), &Director);
+
+  // Move all the instructions in the first cloned block into our entry block.
+  BasicBlock *FirstClonedBB = std::next(Function::iterator(Entry));
+  Entry->getInstList().splice(Entry->end(), FirstClonedBB->getInstList());
+  FirstClonedBB->eraseFromParent();
+
+  return true;
+}
+
+CloningDirector::CloningAction WinEHCatchDirector::handleInstruction(
+    ValueToValueMapTy &VMap, const Instruction *Inst, BasicBlock *NewBB) {
+  // Intercept instructions which extract values from the landing pad aggregate.
+  if (auto *Extract = dyn_cast<ExtractValueInst>(Inst)) {
+    if (Extract->getAggregateOperand() == LPI) {
+      assert(Extract->getNumIndices() == 1 &&
+             "Unexpected operation: extracting both landing pad values");
+      assert((*(Extract->idx_begin()) == 0 || *(Extract->idx_begin()) == 1) &&
+             "Unexpected operation: extracting an unknown landing pad element");
+
+      if (*(Extract->idx_begin()) == 0) {
+        // Element 0 doesn't directly corresponds to anything in the WinEH scheme.
+        // It will be stored to a memory location, then later loaded and finally
+        // the loaded value will be used as the argument to an llvm.eh.begincatch
+        // call.  We're tracking it here so that we can skip the store and load.
+        ExtractedEHPtr = Inst;
+      } else {
+        // Element 1 corresponds to the filter selector.  We'll map it to 1 for
+        // matching purposes, but it will also probably be stored to memory and
+        // reloaded, so we need to track the instuction so that we can map the
+        // loaded value too.
+        VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
+        ExtractedSelector = Inst;
+      }
+
+      // Tell the caller not to clone this instruction.
+      return CloningDirector::SkipInstruction;
+    }
+    // Other extract value instructions just get cloned.
+    return CloningDirector::CloneInstruction;
+  }
+
+  if (auto *Store = dyn_cast<StoreInst>(Inst)) {
+    // Look for and suppress stores of the extracted landingpad values.
+    const Value *StoredValue = Store->getValueOperand();
+    if (StoredValue == ExtractedEHPtr) {
+      EHPtrStoreAddr = Store->getPointerOperand();
+      return CloningDirector::SkipInstruction;
+    }
+    if (StoredValue == ExtractedSelector) {
+      SelectorStoreAddr = Store->getPointerOperand();
+      return CloningDirector::SkipInstruction;
+    }
+
+    // Any other store just gets cloned.
+    return CloningDirector::CloneInstruction;
+  }
+
+  if (auto *Load = dyn_cast<LoadInst>(Inst)) {
+    // Look for loads of (previously suppressed) landingpad values.
+    // The EHPtr load can be ignored (it should only be used as
+    // an argument to llvm.eh.begincatch), but the selector value
+    // needs to be mapped to a constant value of 1 to be used to
+    // simplify the branching to always flow to the current handler.
+    const Value *LoadAddr = Load->getPointerOperand();
+    if (LoadAddr == EHPtrStoreAddr) {
+      VMap[Inst] = UndefValue::get(Int8PtrType);
+      return CloningDirector::SkipInstruction;
+    }
+    if (LoadAddr == SelectorStoreAddr) {
+      VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
+      return CloningDirector::SkipInstruction;
+    }
+
+    // Any other loads just get cloned.
+    return CloningDirector::CloneInstruction;
+  }
+
+  if (match(Inst, m_Intrinsic<Intrinsic::eh_begincatch>())) {
+    // The argument to the call is some form of the first element of the
+    // landingpad aggregate value, but that doesn't matter.  It isn't used
+    // here.
+    // The return value of this instruction, however, is used to access the
+    // EH object pointer.  We have generated an instruction to get that value
+    // from the EH alloc block, so we can just map to that here.
+    VMap[Inst] = EHObj;
+    return CloningDirector::SkipInstruction;
+  }
+  if (match(Inst, m_Intrinsic<Intrinsic::eh_endcatch>())) {
+    auto *IntrinCall = dyn_cast<IntrinsicInst>(Inst);
+    // It might be interesting to track whether or not we are inside a catch
+    // function, but that might make the algorithm more brittle than it needs
+    // to be.
+
+    // The end catch call can occur in one of two places: either in a
+    // landingpad
+    // block that is part of the catch handlers exception mechanism, or at the
+    // end of the catch block.  If it occurs in a landing pad, we must skip it
+    // and continue so that the landing pad gets cloned.
+    // FIXME: This case isn't fully supported yet and shouldn't turn up in any
+    //        of the test cases until it is.
+    if (IntrinCall->getParent()->isLandingPad())
+      return CloningDirector::SkipInstruction;
+
+    // If an end catch occurs anywhere else the next instruction should be an
+    // unconditional branch instruction that we want to replace with a return
+    // to the the address of the branch target.
+    const BasicBlock *EndCatchBB = IntrinCall->getParent();
+    const TerminatorInst *Terminator = EndCatchBB->getTerminator();
+    const BranchInst *Branch = dyn_cast<BranchInst>(Terminator);
+    assert(Branch && Branch->isUnconditional());
+    assert(std::next(BasicBlock::const_iterator(IntrinCall)) ==
+            BasicBlock::const_iterator(Branch));
+
+    ReturnInst::Create(NewBB->getContext(),
+                        BlockAddress::get(Branch->getSuccessor(0)), NewBB);
+
+    // We just added a terminator to the cloned block.
+    // Tell the caller to stop processing the current basic block so that
+    // the branch instruction will be skipped.
+    return CloningDirector::StopCloningBB;
+  }
+  if (match(Inst, m_Intrinsic<Intrinsic::eh_typeid_for>())) {
+    auto *IntrinCall = dyn_cast<IntrinsicInst>(Inst);
+    Value *Selector = IntrinCall->getArgOperand(0)->stripPointerCasts();
+    // This causes a replacement that will collapse the landing pad CFG based
+    // on the filter function we intend to match.
+    if (Selector == CurrentSelector)
+      VMap[Inst] = ConstantInt::get(SelectorIDType, 1);
+    else
+      VMap[Inst] = ConstantInt::get(SelectorIDType, 0);
+    // Tell the caller not to clone this instruction.
+    return CloningDirector::SkipInstruction;
+  }
+
+  // Continue with the default cloning behavior.
+  return CloningDirector::CloneInstruction;
+}

Modified: llvm/trunk/test/CodeGen/X86/cppeh-catch-all.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/cppeh-catch-all.ll?rev=229735&r1=229734&r2=229735&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/cppeh-catch-all.ll (original)
+++ llvm/trunk/test/CodeGen/X86/cppeh-catch-all.ll Wed Feb 18 13:52:46 2015
@@ -1,83 +1,83 @@
-; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
-
-; This test is based on the following code:
-;
-; void test()
-; {
-;   try {
-;     may_throw();
-;   } catch (...) {
-;     handle_exception();
-;   }
-; }
-;
-; Parts of the IR have been hand-edited to simplify the test case.
-; The full IR will be restored when Windows C++ EH support is complete.
-
-; ModuleID = 'catch-all.cpp'
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-pc-windows-msvc"
-
-; Function Attrs: uwtable
-define void @_Z4testv() #0 {
-entry:
-  %exn.slot = alloca i8*
-  %ehselector.slot = alloca i32
-  invoke void @_Z9may_throwv()
-          to label %invoke.cont unwind label %lpad
-
-invoke.cont:                                      ; preds = %entry
-  br label %try.cont
-
-lpad:                                             ; preds = %entry
-  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
-          catch i8* null
-  %1 = extractvalue { i8*, i32 } %0, 0
-  store i8* %1, i8** %exn.slot
-  %2 = extractvalue { i8*, i32 } %0, 1
-  store i32 %2, i32* %ehselector.slot
-  br label %catch
-
-catch:                                            ; preds = %lpad
-  %exn = load i8** %exn.slot
-  %3 = call i8* @llvm.eh.begincatch(i8* %exn) #3
-  call void @_Z16handle_exceptionv()
-  br label %invoke.cont2
-
-invoke.cont2:                                     ; preds = %catch
-  call void @llvm.eh.endcatch()
-  br label %try.cont
-
-try.cont:                                         ; preds = %invoke.cont2, %invoke.cont
-  ret void
-}
-
-; CHECK: define i8* @_Z4testv.catch(i8*, i8*) {
-; CHECK: catch.entry:
-; CHECK:   %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1)
-; CHECK:   %ehdata = bitcast i8* %eh.alloc to %struct._Z4testv.ehdata*
-; CHECK:   %eh.obj.ptr = getelementptr inbounds %struct._Z4testv.ehdata* %ehdata, i32 0, i32 1
-; CHECK:   %eh.obj = load i8** %eh.obj.ptr
-; CHECK:   call void @_Z16handle_exceptionv()
-; CHECK:   ret i8* blockaddress(@_Z4testv, %try.cont)
-; CHECK: }
-
-declare void @_Z9may_throwv() #1
-
-declare i32 @__CxxFrameHandler3(...)
-
-declare i8* @llvm.eh.begincatch(i8*)
-
-declare void @_Z16handle_exceptionv() #1
-
-declare void @llvm.eh.endcatch()
-
-attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #2 = { noinline noreturn nounwind }
-attributes #3 = { nounwind }
-attributes #4 = { noreturn nounwind }
-
-!llvm.ident = !{!0}
-
-!0 = !{!"clang version 3.7.0 (trunk 226027)"}
+; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
+
+; This test is based on the following code:
+;
+; void test()
+; {
+;   try {
+;     may_throw();
+;   } catch (...) {
+;     handle_exception();
+;   }
+; }
+;
+; Parts of the IR have been hand-edited to simplify the test case.
+; The full IR will be restored when Windows C++ EH support is complete.
+
+; ModuleID = 'catch-all.cpp'
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+; Function Attrs: uwtable
+define void @_Z4testv() #0 {
+entry:
+  %exn.slot = alloca i8*
+  %ehselector.slot = alloca i32
+  invoke void @_Z9may_throwv()
+          to label %invoke.cont unwind label %lpad
+
+invoke.cont:                                      ; preds = %entry
+  br label %try.cont
+
+lpad:                                             ; preds = %entry
+  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+          catch i8* null
+  %1 = extractvalue { i8*, i32 } %0, 0
+  store i8* %1, i8** %exn.slot
+  %2 = extractvalue { i8*, i32 } %0, 1
+  store i32 %2, i32* %ehselector.slot
+  br label %catch
+
+catch:                                            ; preds = %lpad
+  %exn = load i8** %exn.slot
+  %3 = call i8* @llvm.eh.begincatch(i8* %exn) #3
+  call void @_Z16handle_exceptionv()
+  br label %invoke.cont2
+
+invoke.cont2:                                     ; preds = %catch
+  call void @llvm.eh.endcatch()
+  br label %try.cont
+
+try.cont:                                         ; preds = %invoke.cont2, %invoke.cont
+  ret void
+}
+
+; CHECK: define i8* @_Z4testv.catch(i8*, i8*) {
+; CHECK: catch.entry:
+; CHECK:   %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1)
+; CHECK:   %ehdata = bitcast i8* %eh.alloc to %struct._Z4testv.ehdata*
+; CHECK:   %eh.obj.ptr = getelementptr inbounds %struct._Z4testv.ehdata* %ehdata, i32 0, i32 1
+; CHECK:   %eh.obj = load i8** %eh.obj.ptr
+; CHECK:   call void @_Z16handle_exceptionv()
+; CHECK:   ret i8* blockaddress(@_Z4testv, %try.cont)
+; CHECK: }
+
+declare void @_Z9may_throwv() #1
+
+declare i32 @__CxxFrameHandler3(...)
+
+declare i8* @llvm.eh.begincatch(i8*)
+
+declare void @_Z16handle_exceptionv() #1
+
+declare void @llvm.eh.endcatch()
+
+attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { noinline noreturn nounwind }
+attributes #3 = { nounwind }
+attributes #4 = { noreturn nounwind }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"clang version 3.7.0 (trunk 226027)"}

Modified: llvm/trunk/test/CodeGen/X86/cppeh-catch-scalar.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/cppeh-catch-scalar.ll?rev=229735&r1=229734&r2=229735&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/cppeh-catch-scalar.ll (original)
+++ llvm/trunk/test/CodeGen/X86/cppeh-catch-scalar.ll Wed Feb 18 13:52:46 2015
@@ -1,102 +1,102 @@
-; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
-
-; This test is based on the following code:
-;
-; void test()
-; {
-;   try {
-;     may_throw();
-;   } catch (int) {
-;     handle_int();
-;   }
-; }
-;
-; Parts of the IR have been hand-edited to simplify the test case.
-; The full IR will be restored when Windows C++ EH support is complete.
-
-;ModuleID = 'cppeh-catch-scalar.cpp'
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-pc-windows-msvc"
-
- at _ZTIi = external constant i8*
-
-; Function Attrs: uwtable
-define void @_Z4testv() #0 {
-entry:
-  %exn.slot = alloca i8*
-  %ehselector.slot = alloca i32
-  invoke void @_Z9may_throwv()
-          to label %invoke.cont unwind label %lpad
-
-invoke.cont:                                      ; preds = %entry
-  br label %try.cont
-
-lpad:                                             ; preds = %entry
-  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
-          catch i8* bitcast (i8** @_ZTIi to i8*)
-  %1 = extractvalue { i8*, i32 } %0, 0
-  store i8* %1, i8** %exn.slot
-  %2 = extractvalue { i8*, i32 } %0, 1
-  store i32 %2, i32* %ehselector.slot
-  br label %catch.dispatch
-
-catch.dispatch:                                   ; preds = %lpad
-  %sel = load i32* %ehselector.slot
-  %3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #3
-  %matches = icmp eq i32 %sel, %3
-  br i1 %matches, label %catch, label %eh.resume
-
-catch:                                            ; preds = %catch.dispatch
-  %exn11 = load i8** %exn.slot
-  %4 = call i8* @llvm.eh.begincatch(i8* %exn11) #3
-  %5 = bitcast i8* %4 to i32*
-  call void @_Z10handle_intv()
-  br label %invoke.cont2
-
-invoke.cont2:                                     ; preds = %catch
-  call void @llvm.eh.endcatch() #3
-  br label %try.cont
-
-try.cont:                                         ; preds = %invoke.cont2, %invoke.cont
-  ret void
-
-eh.resume:                                        ; preds = %catch.dispatch
-  %exn3 = load i8** %exn.slot
-  %sel4 = load i32* %ehselector.slot
-  %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn3, 0
-  %lpad.val5 = insertvalue { i8*, i32 } %lpad.val, i32 %sel4, 1
-  resume { i8*, i32 } %lpad.val5
-}
-
-; CHECK: define i8* @_Z4testv.catch(i8*, i8*) {
-; CHECK: catch.entry:
-; CHECK:   %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1)
-; CHECK:   %ehdata = bitcast i8* %eh.alloc to %struct._Z4testv.ehdata*
-; CHECK:   %eh.obj.ptr = getelementptr inbounds %struct._Z4testv.ehdata* %ehdata, i32 0, i32 1
-; CHECK:   %eh.obj = load i8** %eh.obj.ptr
-; CHECK:   %2 = bitcast i8* %eh.obj to i32*
-; CHECK:   call void @_Z10handle_intv()
-; CHECK:   ret i8* blockaddress(@_Z4testv, %try.cont)
-; CHECK: }
-
-declare void @_Z9may_throwv() #1
-
-declare i32 @__CxxFrameHandler3(...)
-
-; Function Attrs: nounwind readnone
-declare i32 @llvm.eh.typeid.for(i8*) #2
-
-declare i8* @llvm.eh.begincatch(i8*)
-
-declare void @llvm.eh.endcatch()
-
-declare void @_Z10handle_intv() #1
-
-attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
-attributes #2 = { nounwind readnone }
-attributes #3 = { nounwind }
-
-!llvm.ident = !{!0}
-
-!0 = !{!"clang version 3.7.0 (trunk 227474) (llvm/trunk 227508)"}
+; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
+
+; This test is based on the following code:
+;
+; void test()
+; {
+;   try {
+;     may_throw();
+;   } catch (int) {
+;     handle_int();
+;   }
+; }
+;
+; Parts of the IR have been hand-edited to simplify the test case.
+; The full IR will be restored when Windows C++ EH support is complete.
+
+;ModuleID = 'cppeh-catch-scalar.cpp'
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+ at _ZTIi = external constant i8*
+
+; Function Attrs: uwtable
+define void @_Z4testv() #0 {
+entry:
+  %exn.slot = alloca i8*
+  %ehselector.slot = alloca i32
+  invoke void @_Z9may_throwv()
+          to label %invoke.cont unwind label %lpad
+
+invoke.cont:                                      ; preds = %entry
+  br label %try.cont
+
+lpad:                                             ; preds = %entry
+  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+          catch i8* bitcast (i8** @_ZTIi to i8*)
+  %1 = extractvalue { i8*, i32 } %0, 0
+  store i8* %1, i8** %exn.slot
+  %2 = extractvalue { i8*, i32 } %0, 1
+  store i32 %2, i32* %ehselector.slot
+  br label %catch.dispatch
+
+catch.dispatch:                                   ; preds = %lpad
+  %sel = load i32* %ehselector.slot
+  %3 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #3
+  %matches = icmp eq i32 %sel, %3
+  br i1 %matches, label %catch, label %eh.resume
+
+catch:                                            ; preds = %catch.dispatch
+  %exn11 = load i8** %exn.slot
+  %4 = call i8* @llvm.eh.begincatch(i8* %exn11) #3
+  %5 = bitcast i8* %4 to i32*
+  call void @_Z10handle_intv()
+  br label %invoke.cont2
+
+invoke.cont2:                                     ; preds = %catch
+  call void @llvm.eh.endcatch() #3
+  br label %try.cont
+
+try.cont:                                         ; preds = %invoke.cont2, %invoke.cont
+  ret void
+
+eh.resume:                                        ; preds = %catch.dispatch
+  %exn3 = load i8** %exn.slot
+  %sel4 = load i32* %ehselector.slot
+  %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn3, 0
+  %lpad.val5 = insertvalue { i8*, i32 } %lpad.val, i32 %sel4, 1
+  resume { i8*, i32 } %lpad.val5
+}
+
+; CHECK: define i8* @_Z4testv.catch(i8*, i8*) {
+; CHECK: catch.entry:
+; CHECK:   %eh.alloc = call i8* @llvm.framerecover(i8* bitcast (void ()* @_Z4testv to i8*), i8* %1)
+; CHECK:   %ehdata = bitcast i8* %eh.alloc to %struct._Z4testv.ehdata*
+; CHECK:   %eh.obj.ptr = getelementptr inbounds %struct._Z4testv.ehdata* %ehdata, i32 0, i32 1
+; CHECK:   %eh.obj = load i8** %eh.obj.ptr
+; CHECK:   %2 = bitcast i8* %eh.obj to i32*
+; CHECK:   call void @_Z10handle_intv()
+; CHECK:   ret i8* blockaddress(@_Z4testv, %try.cont)
+; CHECK: }
+
+declare void @_Z9may_throwv() #1
+
+declare i32 @__CxxFrameHandler3(...)
+
+; Function Attrs: nounwind readnone
+declare i32 @llvm.eh.typeid.for(i8*) #2
+
+declare i8* @llvm.eh.begincatch(i8*)
+
+declare void @llvm.eh.endcatch()
+
+declare void @_Z10handle_intv() #1
+
+attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind readnone }
+attributes #3 = { nounwind }
+
+!llvm.ident = !{!0}
+
+!0 = !{!"clang version 3.7.0 (trunk 227474) (llvm/trunk 227508)"}





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