Revert "Emit the CodeView `S_ARMSWITCHTABLE` debug symbol for jump tables"

This reverts commit 8d0c3db388143f4e058b5f513a70fd5d089d51c3.

Causes crashes, see comments in https://reviews.llvm.org/D149367.

Some follow-up fixes are also reverted:

This reverts commit 636269f4fca44693bfd787b0a37bb0328ffcc085.
This reverts commit 5966079cf4d4de0285004eef051784d0d9f7a3a6.
This reverts commit e7294dbc85d24a08c716d9babbe7f68390cf219b.

4 files changed, 0 insertions, 46 deletions

diff --git a/llvm/lib/DebugInfo/CodeView/EnumTables.cpp b/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
index 7e3087373bfa..b2f0099bd01c 100644
--- a/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
+++ b/llvm/lib/DebugInfo/CodeView/EnumTables.cpp
@@ -434,20 +434,6 @@ static const EnumEntry<uint16_t> LabelTypeEnum[] = {
     CV_ENUM_CLASS_ENT(LabelType, Far),
 };
 
-static const EnumEntry<uint16_t> JumpTableEntrySizeNames[] = {
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Int8),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, UInt8),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Int16),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, UInt16),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Int32),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, UInt32),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Pointer),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, UInt8ShiftLeft),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, UInt16ShiftLeft),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Int8ShiftLeft),
-    CV_ENUM_CLASS_ENT(JumpTableEntrySize, Int16ShiftLeft),
-};
-
 namespace llvm {
 namespace codeview {
 
@@ -573,9 +559,5 @@ ArrayRef<EnumEntry<uint16_t>> getLabelTypeEnum() {
   return ArrayRef(LabelTypeEnum);
 }
 
-ArrayRef<EnumEntry<uint16_t>> getJumpTableEntrySizeNames() {
-  return ArrayRef(JumpTableEntrySizeNames);
-}
-
 } // end namespace codeview
 } // end namespace llvm
diff --git a/llvm/lib/DebugInfo/CodeView/SymbolDumper.cpp b/llvm/lib/DebugInfo/CodeView/SymbolDumper.cpp
index c86fb244f688..cfb12dbae845 100644
--- a/llvm/lib/DebugInfo/CodeView/SymbolDumper.cpp
+++ b/llvm/lib/DebugInfo/CodeView/SymbolDumper.cpp
@@ -643,20 +643,6 @@ Error CVSymbolDumperImpl::visitKnownRecord(CVSymbol &CVR,
   return Error::success();
 }
 
-Error CVSymbolDumperImpl::visitKnownRecord(CVSymbol &CVR,
-                                           JumpTableSym &JumpTable) {
-  W.printHex("BaseOffset", JumpTable.BaseOffset);
-  W.printNumber("BaseSegment", JumpTable.BaseSegment);
-  W.printEnum("SwitchType", static_cast<uint16_t>(JumpTable.SwitchType),
-              getJumpTableEntrySizeNames());
-  W.printHex("BranchOffset", JumpTable.BranchOffset);
-  W.printHex("TableOffset", JumpTable.TableOffset);
-  W.printNumber("BranchSegment", JumpTable.BranchSegment);
-  W.printNumber("TableSegment", JumpTable.TableSegment);
-  W.printNumber("EntriesCount", JumpTable.EntriesCount);
-  return Error::success();
-}
-
 Error CVSymbolDumperImpl::visitUnknownSymbol(CVSymbol &CVR) {
   W.printNumber("Length", CVR.length());
   return Error::success();
diff --git a/llvm/lib/DebugInfo/CodeView/SymbolRecordMapping.cpp b/llvm/lib/DebugInfo/CodeView/SymbolRecordMapping.cpp
index b5e366b965a9..3b627930e271 100644
--- a/llvm/lib/DebugInfo/CodeView/SymbolRecordMapping.cpp
+++ b/llvm/lib/DebugInfo/CodeView/SymbolRecordMapping.cpp
@@ -483,19 +483,6 @@ Error SymbolRecordMapping::visitKnownRecord(CVSymbol &CVR,
   return Error::success();
 }
 
-Error SymbolRecordMapping::visitKnownRecord(CVSymbol &CVR,
-                                            JumpTableSym &JumpTable) {
-  error(IO.mapInteger(JumpTable.BaseOffset));
-  error(IO.mapInteger(JumpTable.BaseSegment));
-  error(IO.mapEnum(JumpTable.SwitchType));
-  error(IO.mapInteger(JumpTable.BranchOffset));
-  error(IO.mapInteger(JumpTable.TableOffset));
-  error(IO.mapInteger(JumpTable.BranchSegment));
-  error(IO.mapInteger(JumpTable.TableSegment));
-  error(IO.mapInteger(JumpTable.EntriesCount));
-  return Error::success();
-}
-
 RegisterId codeview::decodeFramePtrReg(EncodedFramePtrReg EncodedReg,
                                        CPUType CPU) {
   assert(unsigned(EncodedReg) < 4);
diff --git a/llvm/lib/DebugInfo/CodeView/TypeIndexDiscovery.cpp b/llvm/lib/DebugInfo/CodeView/TypeIndexDiscovery.cpp
index e903a37a8c8e..682747a2b81f 100644
--- a/llvm/lib/DebugInfo/CodeView/TypeIndexDiscovery.cpp
+++ b/llvm/lib/DebugInfo/CodeView/TypeIndexDiscovery.cpp
@@ -442,7 +442,6 @@ static bool discoverTypeIndices(ArrayRef<uint8_t> Content, SymbolKind Kind,
   case SymbolKind::S_THUNK32:
   case SymbolKind::S_FRAMECOOKIE:
   case SymbolKind::S_UNAMESPACE:
-  case SymbolKind::S_ARMSWITCHTABLE:
     break;
   // Scope ending symbols.
   case SymbolKind::S_END: