Remove unnecessary fold_convert in gfc_(un)likely

This patch removes an unnecessary fold_convert to boolean_type_node at
the end of gfc_likely and gfc_unlikely.  It makes no difference to the
generated code, but makes tree dumps a little bit cleaner.

2017-09-25  Janne Blomqvist  <jb@gcc.gnu.org>
        * trans.c (gfc_unlikely): Remove unnecessary fold_convert.
        (gfc_likely): Likewise.

Regtested on x86_64-pc-linux-gnu.

From-SVN: r253132

gcc/fortran/ChangeLog

+2017-09-25  Janne Blomqvist  <jb@gcc.gnu.org>
+
+	* trans.c (gfc_unlikely): Remove unnecessary fold_convert.
+	(gfc_likely): Likewise.
+
 2017-09-24  Thomas Koenig  <tkoenig@gcc.gnu.org>
 	    Steven G. Kargl  <kargl@gcc.gnu.org>
 

gcc/fortran/trans.c

@@ -2275,7 +2275,6 @@ gfc_unlikely (tree cond, enum br_predictor predictor)
 				  build_int_cst (integer_type_node,
 						 predictor));
     }
-  cond = fold_convert (boolean_type_node, cond);
   return cond;
 }
 
@@ -2297,7 +2296,6 @@ gfc_likely (tree cond, enum br_predictor predictor)
 				  build_int_cst (integer_type_node,
 						 predictor));
     }
-  cond = fold_convert (boolean_type_node, cond);
   return cond;
 }