Revert "Implement _ExtInt as an extended int type specifier."

This reverts commit 61ba1481e200b5b35baa81ffcff81acb678e8508.

I'm reverting this because it breaks the lldb build with
incomplete switch coverage warnings. I would fix it forward,
but am not familiar enough with lldb to determine the correct
fix.

lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp:3958:11: error: enumeration values 'DependentExtInt' and 'ExtInt' not handled in switch [-Werror,-Wswitch]
  switch (qual_type->getTypeClass()) {
          ^
lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp:4633:11: error: enumeration values 'DependentExtInt' and 'ExtInt' not handled in switch [-Werror,-Wswitch]
  switch (qual_type->getTypeClass()) {
          ^
lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp:4889:11: error: enumeration values 'DependentExtInt' and 'ExtInt' not handled in switch [-Werror,-Wswitch]
  switch (qual_type->getTypeClass()) {

1 files changed, 0 insertions, 30 deletions

diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index fe00199..8bd7571 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -2880,25 +2880,6 @@ void Parser::ParseAlignmentSpecifier(ParsedAttributes &Attrs,
                ParsedAttr::AS_Keyword, EllipsisLoc);
 }
 
-ExprResult Parser::ParseExtIntegerArgument() {
-  assert(Tok.is(tok::kw__ExtInt) && "Not an extended int type");
-  ConsumeToken();
-
-  BalancedDelimiterTracker T(*this, tok::l_paren);
-  if (T.expectAndConsume())
-    return ExprError();
-
-  ExprResult ER = ParseConstantExpression();
-  if (ER.isInvalid()) {
-    T.skipToEnd();
-    return ExprError();
-  }
-
-  if(T.consumeClose())
-    return ExprError();
-  return ER;
-}
-
 /// Determine whether we're looking at something that might be a declarator
 /// in a simple-declaration. If it can't possibly be a declarator, maybe
 /// diagnose a missing semicolon after a prior tag definition in the decl
@@ -3826,14 +3807,6 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
       isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec,
                                      DiagID, Policy);
       break;
-    case tok::kw__ExtInt: {
-      ExprResult ER = ParseExtIntegerArgument();
-      if (ER.isInvalid())
-        continue;
-      isInvalid = DS.SetExtIntType(Loc, ER.get(), PrevSpec, DiagID, Policy);
-      ConsumedEnd = PrevTokLocation;
-      break;
-    }
     case tok::kw___int128:
       isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int128, Loc, PrevSpec,
                                      DiagID, Policy);
@@ -4917,7 +4890,6 @@ bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const {
   case tok::kw_char16_t:
   case tok::kw_char32_t:
   case tok::kw_int:
-  case tok::kw__ExtInt:
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double:
@@ -4997,7 +4969,6 @@ bool Parser::isTypeSpecifierQualifier() {
   case tok::kw_char16_t:
   case tok::kw_char32_t:
   case tok::kw_int:
-  case tok::kw__ExtInt:
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double:
@@ -5164,7 +5135,6 @@ bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) {
   case tok::kw_char32_t:
 
   case tok::kw_int:
-  case tok::kw__ExtInt:
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_double: