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, 20 deletions

diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index 61a8266..529e3f3 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -1141,7 +1141,6 @@ Parser::isExpressionOrTypeSpecifierSimple(tok::TokenKind Kind) {
   case tok::kw_half:
   case tok::kw_float:
   case tok::kw_int:
-  case tok::kw__ExtInt:
   case tok::kw_long:
   case tok::kw___int64:
   case tok::kw___int128:
@@ -1779,24 +1778,6 @@ Parser::isCXXDeclarationSpecifier(Parser::TPResult BracedCastResult,
   case tok::kw__Atomic:
     return TPResult::True;
 
-  case tok::kw__ExtInt: {
-    if (NextToken().isNot(tok::l_paren))
-      return TPResult::Error;
-    RevertingTentativeParsingAction PA(*this);
-    ConsumeToken();
-    ConsumeParen();
-
-    if (!SkipUntil(tok::r_paren, StopAtSemi))
-      return TPResult::Error;
-
-    if (Tok.is(tok::l_paren))
-      return TPResult::Ambiguous;
-
-    if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace))
-      return BracedCastResult;
-
-    return TPResult::True;
-  }
   default:
     return TPResult::False;
   }
@@ -1829,7 +1810,6 @@ bool Parser::isCXXDeclarationSpecifierAType() {
   case tok::kw_bool:
   case tok::kw_short:
   case tok::kw_int:
-  case tok::kw__ExtInt:
   case tok::kw_long:
   case tok::kw___int64:
   case tok::kw___int128: