Fix PR 93568 (thinko)

2020-02-05  Michael Meissner  <meissner@linux.ibm.com>

	PR target/93568
	* config/rs6000/rs6000.c (get_vector_offset): Fix

gcc/ChangeLog

+2020-02-05  Michael Meissner  <meissner@linux.ibm.com>
+
+	PR target/93568
+	* config/rs6000/rs6000.c (get_vector_offset): Fix
+
 2020-02-05  Andrew Stubbs  <ams@codesourcery.com>
 
 	* config/gcn/t-gcn-hsa (MULTILIB_OPTIONS): Use / not space.

gcc/config/rs6000/rs6000.c

@@ -6744,8 +6744,7 @@ get_vector_offset (rtx mem, rtx element, rtx base_tmp, unsigned scalar_size)
 
   /* All insns should use the 'Q' constraint (address is a single register) if
      the element number is not a constant.  */
-  rtx addr = XEXP (mem, 0);
-  gcc_assert (satisfies_constraint_Q (addr));
+  gcc_assert (satisfies_constraint_Q (mem));
 
   /* Mask the element to make sure the element number is between 0 and the
      maximum number of elements - 1 so that we don't generate an address