[gcc r12-9458] Revert "c++: signed __int128_t [PR108099]"

[gcc r12-9458] Revert "c++: signed __int128_t [PR108099]"

[Jason Merrill]

https://gcc.gnu.org/g:0c97fe08e46e8ccbd6a6346b62a8df78764014ac

commit r12-9458-g0c97fe08e46e8ccbd6a6346b62a8df78764014ac
Author: Jason Merrill <jason@redhat.com>
Date:   Wed Apr 19 23:25:39 2023 -0400

    Revert "c++: signed __int128_t [PR108099]"
    
    Given the remaining issues even after these patches, let's leave this bug
    alone on the GCC 12 branch for now.
    
    This reverts commit 32955c1c2246aa336d3fd2423c32546c39a6ca30.
    This reverts commit 7b30f13b904f137c77e5180357af7917a3b47af0.

Diff:
---
 gcc/cp/decl.cc                      | 15 ++++-----------
 gcc/testsuite/g++.dg/ext/int128-7.C |  4 ----
 gcc/testsuite/g++.dg/ext/int128-8.C | 24 ------------------------
 3 files changed, 4 insertions(+), 39 deletions(-)

diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
index f514377dd42..ab9a009fb7e 100644
--- a/gcc/cp/decl.cc
+++ b/gcc/cp/decl.cc
@@ -12300,18 +12300,11 @@ grokdeclarator (const cp_declarator *declarator,
 	{
 	  if (typedef_decl)
 	    {
-	      pedwarn (loc, OPT_Wpedantic, "%qs specified with %qD",
-		       key, typedef_decl);
+	      pedwarn (loc, OPT_Wpedantic, "%qs specified with %qT",
+		       key, type);
 	      ok = !flag_pedantic_errors;
-	      if (is_typedef_decl (typedef_decl))
-		{
-		  type = DECL_ORIGINAL_TYPE (typedef_decl);
-		  typedef_decl = NULL_TREE;
-		}
-	      else
-		/* PR108099: __int128_t comes from c_common_nodes_and_builtins,
-		   and is not built as a typedef.  */
-		type = TREE_TYPE (typedef_decl);
+	      type = DECL_ORIGINAL_TYPE (typedef_decl);
+	      typedef_decl = NULL_TREE;
 	    }
 	  else if (declspecs->decltype_p)
 	    error_at (loc, "%qs specified with %<decltype%>", key);
diff --git a/gcc/testsuite/g++.dg/ext/int128-7.C b/gcc/testsuite/g++.dg/ext/int128-7.C
deleted file mode 100644
index bf5e8c40a4b..00000000000
--- a/gcc/testsuite/g++.dg/ext/int128-7.C
+++ /dev/null
@@ -1,4 +0,0 @@
-// PR c++/108099
-// { dg-do compile { target { c++11 && int128 } } }
-
-using i128 = signed __int128_t;	// { dg-error "specified with" }
diff --git a/gcc/testsuite/g++.dg/ext/int128-8.C b/gcc/testsuite/g++.dg/ext/int128-8.C
deleted file mode 100644
index 7e909d50873..00000000000
--- a/gcc/testsuite/g++.dg/ext/int128-8.C
+++ /dev/null
@@ -1,24 +0,0 @@
-// PR c++/108099
-// { dg-do compile { target { c++11 && int128 } } }
-// { dg-options "" }
-
-using u128 = unsigned __int128_t;
-using s128 = signed __int128_t;
-template <typename T, T v> struct integral_constant {
-  static constexpr T value = v;
-};
-typedef integral_constant <bool, false> false_type;
-typedef integral_constant <bool, true> true_type;
-template <class T, class U>
-struct is_same : false_type {};
-template <class T>
-struct is_same <T, T> : true_type {};
-static_assert (is_same <__int128, s128>::value, "");
-static_assert (is_same <signed __int128, s128>::value, "");
-static_assert (is_same <__int128_t, s128>::value, "");
-static_assert (is_same <unsigned __int128, u128>::value, ""); // { dg-bogus "" "" { xfail *-*-* } }
-static_assert (is_same <__uint128_t, u128>::value, "");	      // { dg-bogus "" "" { xfail *-*-* } }
-static_assert (sizeof (s128) == sizeof (__int128), "");
-static_assert (sizeof (u128) == sizeof (unsigned __int128), "");
-static_assert (s128(-1) < 0, "");
-static_assert (u128(-1) > 0, "");