[Bug fortran/96711] Internal Compiler Error on NINT() Function

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96711

--- Comment #8 from anlauf at gcc dot gnu.org ---
A very quick hack seems to solve the issue for me.  For some reason the
final fold_convert seems to create a problem.  Does anybody know why?
It there a shorter solution?

diff --git a/gcc/fortran/trans-intrinsic.c b/gcc/fortran/trans-intrinsic.c
index 2483f016d8e..deb3030b75d 100644
--- a/gcc/fortran/trans-intrinsic.c
+++ b/gcc/fortran/trans-intrinsic.c
@@ -395,11 +395,26 @@ build_round_expr (tree arg, tree restype)
     fn = builtin_decl_for_precision (BUILT_IN_LROUND, argprec);
   else if (resprec <= LONG_LONG_TYPE_SIZE)
     fn = builtin_decl_for_precision (BUILT_IN_LLROUND, argprec);
+  else if (resprec >= argprec && resprec == 128)
+    {
+      /* Search for a real kind suitable as temporary for conversion.  */
+      int kind = -1;
+      for (int i = 0; kind < 0 && gfc_real_kinds[i].kind != 0; i++)
+       if (gfc_real_kinds[i].mode_precision >= resprec)
+         kind = gfc_real_kinds[i].kind;
+      if (kind < 0)
+       gfc_internal_error ("Could not find real kind with at least %d bits",
+                           resprec);
+      arg = fold_convert (gfc_float128_type_node, arg);
+      fn = gfc_builtin_decl_for_float_kind (BUILT_IN_ROUND, kind);
+    }
   else
     gcc_unreachable ();

-  return fold_convert (restype, build_call_expr_loc (input_location,
-                                                fn, 1, arg));
+  return convert (restype, build_call_expr_loc (input_location,
+                                               fn, 1, arg));
+  /* return fold_convert (restype, build_call_expr_loc (input_location, */
+  /*                                            fn, 1, arg)); */
 }