1 files changed, 8 insertions, 39 deletions

diff --git a/llvm/lib/CodeGen/WinEHPrepare.cpp b/llvm/lib/CodeGen/WinEHPrepare.cpp
index 05de6bf39fa..bc3cc6b9b85 100644
--- a/llvm/lib/CodeGen/WinEHPrepare.cpp
+++ b/llvm/lib/CodeGen/WinEHPrepare.cpp
@@ -20,8 +20,6 @@
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/TinyPtrVector.h"
 #include "llvm/Analysis/LibCallSemantics.h"
-#include "llvm/Analysis/TargetTransformInfo.h"
-#include "llvm/IR/Dominators.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/Instructions.h"
@@ -63,12 +61,10 @@ typedef DenseMap<const BasicBlock *, CatchHandler *> CatchHandlerMapTy;
 typedef DenseMap<const BasicBlock *, CleanupHandler *> CleanupHandlerMapTy;
 
 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)) {}
+      : FunctionPass(ID) {}
 
   bool runOnFunction(Function &Fn) override;
 
@@ -323,23 +319,13 @@ private:
 } // end anonymous namespace
 
 char WinEHPrepare::ID = 0;
-INITIALIZE_TM_PASS_BEGIN(WinEHPrepare, "winehprepare",
-                         "Prepare Windows exceptions", false, false)
-INITIALIZE_PASS_DEPENDENCY(DwarfEHPrepare)
-INITIALIZE_PASS_DEPENDENCY(DominatorTreeWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(TargetTransformInfoWrapperPass)
-INITIALIZE_TM_PASS_END(WinEHPrepare, "winehprepare",
-                       "Prepare Windows exceptions", false, false)
+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;
@@ -357,24 +343,9 @@ bool WinEHPrepare::runOnFunction(Function &Fn) {
   // 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)) {
-    if (!DwarfPrepare->getResolver()) {
-      // Build an AnalysisResolver with the analyses needed by DwarfEHPrepare.
-      // It will take ownership of the AnalysisResolver.
-      assert(getResolver());
-      auto *AR = new AnalysisResolver(getResolver()->getPMDataManager());
-      AR->addAnalysisImplsPair(
-          &TargetTransformInfoWrapperPass::ID,
-          getResolver()->findImplPass(&TargetTransformInfoWrapperPass::ID));
-      AR->addAnalysisImplsPair(
-          &DominatorTreeWrapperPass::ID,
-          getResolver()->findImplPass(&DominatorTreeWrapperPass::ID));
-      DwarfPrepare->setResolver(AR);
-    }
-
-    return DwarfPrepare->runOnFunction(Fn);
-  }
+  // Do nothing if this is not an MSVC personality.
+  if (!isMSVCEHPersonality(Pers))
+    return false;
 
   // FIXME: This only returns true if the C++ EH handlers were outlined.
   //        When that code is complete, it should always return whatever
@@ -395,12 +366,10 @@ bool WinEHPrepare::runOnFunction(Function &Fn) {
 }
 
 bool WinEHPrepare::doFinalization(Module &M) {
-  return DwarfPrepare->doFinalization(M);
+  return false;
 }
 
-void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const {
-  DwarfPrepare->getAnalysisUsage(AU);
-}
+void WinEHPrepare::getAnalysisUsage(AnalysisUsage &AU) const {}
 
 bool WinEHPrepare::prepareCPPEHHandlers(
     Function &F, SmallVectorImpl<LandingPadInst *> &LPads) {