I've committed the trivial patch of removing the redundant
conditional.

2017-05-15  Steven G. Kargl  <ka...@gcc.gnu.org>

        PR fortran/80674
        * trans-stmt.c (gfc_trans_integer_select): Remove redundant condition.

Index: trans-stmt.c
===================================================================
--- trans-stmt.c        (revision 248078)
+++ trans-stmt.c        (working copy)
@@ -2575,9 +2575,8 @@ gfc_trans_integer_select (gfc_code * cod
                 to represent unbounded cases.  */
 
              if (!cp->low
-                 || (cp->low
-                     && mpz_cmp (cp->low->value.integer,
-                                 cp->high->value.integer) != 0))
+                 || (mpz_cmp (cp->low->value.integer,
+                               cp->high->value.integer) != 0))
                high = gfc_conv_mpz_to_tree (cp->high->value.integer,
                                             cp->high->ts.kind);
 
-- 
Steve
20170425 https://www.youtube.com/watch?v=VWUpyCsUKR4
20161221 https://www.youtube.com/watch?v=IbCHE-hONow

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