BU_FUTURE_MISC_2 is (currently) only used for instructions that require
64-bit registers.
2020-05-15  Segher Boessenkool  <segher@kernel.crashing.org>
	* config/rs6000/rs6000-builtin.def (BU_FUTURE_MISC_2): Also require
	RS6000_BTM_POWERPC64.
+2020-05-15  Segher Boessenkool  <segher@kernel.crashing.org>
+
+       * config/rs6000/rs6000-builtin.def (BU_FUTURE_MISC_2): Also require
+       RS6000_BTM_POWERPC64.
+
 2020-05-15  Uroš Bizjak  <ubizjak@gmail.com>
 
        * config/i386/i386.md (SWI48DWI): New mode iterator.
 
 #define BU_FUTURE_MISC_2(ENUM, NAME, ATTR, ICODE)                      \
   RS6000_BUILTIN_2 (FUTURE_BUILTIN_ ## ENUM,           /* ENUM */      \
                    "__builtin_" NAME,                  /* NAME */      \
-                   RS6000_BTM_FUTURE,                  /* MASK */      \
+                   RS6000_BTM_FUTURE                                   \
+                   | RS6000_BTM_POWERPC64,             /* MASK */      \
                    (RS6000_BTC_ ## ATTR                /* ATTR */      \
                     | RS6000_BTC_BINARY),                              \
                    CODE_FOR_ ## ICODE)                 /* ICODE */