Revert "[ORC] Enable JIT support for the compact-unwind frame info format..."

This reverts 4f03258 and follow-up patches
(see below) while I investigate some ongoing failures on the buildbots.

---

Revert "[clang-repl] Try to XFAIL testcase on arm32 without affecting arm64
darwin."

This reverts commit fd174f0.

Revert "[clang-repl] The simple-exception test now passes on arm64-darwin."

This reverts commit c9bc242.

Revert "[ORC] Destroy defunct MaterializationUnits outside the session lock."

This reverts commit a001cc0.

Revert "[ORC] Add explicit narrowing casts to fix build errors."

This reverts commit 26fc07d.

Revert "[ORC] Enable JIT support for the compact-unwind frame info format on
Darwin."

This reverts commit 4f03258.

Author: lhames

clang/test/Interpreter/simple-exception.cpp

@@ -1,7 +1,7 @@
 // clang-format off
 // UNSUPPORTED: system-aix
-// XFAIL for arm, or running on Windows.
-// XFAIL: target=arm-{{.*}}, target=armv{{.*}}, system-windows
+// XFAIL for arm and arm64, or running on Windows.
+// XFAIL: target=arm{{.*}}, system-windows
 // RUN: cat %s | clang-repl | FileCheck %s
 
 // Incompatible with msan. It passes with -O3 but fail -Oz. Interpreter

compiler-rt/lib/orc/macho_platform.cpp

@@ -557,12 +557,6 @@ Error MachOPlatformRuntimeState::registerObjectPlatformSections(
     return make_error<StringError>(ErrStream.str());
   }
 
-  ORC_RT_DEBUG({
-    printdbg("  UnwindInfo: %s, UseCallbackStyleUnwindInfo: %s\n",
-             UnwindInfo ? "true" : "false",
-             UseCallbackStyleUnwindInfo ? "true" : "false");
-  });
-
   if (UnwindInfo && UseCallbackStyleUnwindInfo) {
     ORC_RT_DEBUG({
       printdbg("  Registering new-style unwind info for:\n"

compiler-rt/test/orc/TestCases/Darwin/Generic/exceptions.cpp

@@ -1204,13 +1204,8 @@ class JITDylib : public ThreadSafeRefCountedBase<JITDylib>,
 
   JITDylib(ExecutionSession &ES, std::string Name);
 
-  struct RemoveTrackerResult {
-    AsynchronousSymbolQuerySet QueriesToFail;
-    std::shared_ptr<SymbolDependenceMap> FailedSymbols;
-    std::vector<std::unique_ptr<MaterializationUnit>> DefunctMUs;
-  };
-
-  RemoveTrackerResult IL_removeTracker(ResourceTracker &RT);
+  std::pair<AsynchronousSymbolQuerySet, std::shared_ptr<SymbolDependenceMap>>
+  IL_removeTracker(ResourceTracker &RT);
 
   void transferTracker(ResourceTracker &DstRT, ResourceTracker &SrcRT);
 

llvm/include/llvm/ExecutionEngine/Orc/Core.h

@@ -20,7 +20,6 @@
 #include "llvm/ExecutionEngine/Orc/Shared/TargetProcessControlTypes.h"
 #include "llvm/ExecutionEngine/Orc/Shared/WrapperFunctionUtils.h"
 #include "llvm/ExecutionEngine/Orc/SymbolStringPool.h"
-#include "llvm/ExecutionEngine/Orc/TargetProcess/UnwindInfoManager.h"
 #include "llvm/ExecutionEngine/Orc/TaskDispatch.h"
 #include "llvm/Support/DynamicLibrary.h"
 #include "llvm/Support/MSVCErrorWorkarounds.h"
@@ -508,7 +507,6 @@ class SelfExecutorProcessControl : public ExecutorProcessControl,
                           SymbolLookupCompleteFn F) override;
 
   std::unique_ptr<jitlink::JITLinkMemoryManager> OwnedMemMgr;
-  std::unique_ptr<UnwindInfoManager> UnwindInfoMgr;
   char GlobalManglingPrefix = 0;
 };
 

llvm/include/llvm/ExecutionEngine/Orc/ExecutorProcessControl.h

@@ -88,15 +88,6 @@ using SPSRunAsMainSignature = int64_t(shared::SPSExecutorAddr,
 using SPSRunAsVoidFunctionSignature = int32_t(shared::SPSExecutorAddr);
 using SPSRunAsIntFunctionSignature = int32_t(shared::SPSExecutorAddr, int32_t);
 } // end namespace rt
-
-namespace rt_alt {
-extern const char *UnwindInfoManagerInstanceName;
-extern const char *UnwindInfoManagerFindSectionsHelperName;
-extern const char *UnwindInfoManagerEnableWrapperName;
-extern const char *UnwindInfoManagerDisableWrapperName;
-extern const char *UnwindInfoManagerRegisterActionName;
-extern const char *UnwindInfoManagerDeregisterActionName;
-} // end namespace rt_alt
 } // end namespace orc
 } // end namespace llvm
 

llvm/include/llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h

@@ -3,7 +3,6 @@ tablegen(LLVM COFFOptions.inc -gen-opt-parser-defs)
 add_public_tablegen_target(JITLinkTableGen)
 
 add_llvm_component_library(LLVMJITLink
-  CompactUnwindSupport.cpp
   DWARFRecordSectionSplitter.cpp
   EHFrameSupport.cpp
   JITLink.cpp