Fix AArch64 ILP32 ICE.

Ensure that the address really is the correct mode for an address.

2018-09-25  Andrew Stubbs  <ams@codesourcery.com>

	gcc/
	* builtins.c (get_builtin_sync_mem): Force address mode conversion.

From-SVN: r264650

gcc/ChangeLog

+2018-09-25  Andrew Stubbs  <ams@codesourcery.com>
+
+	* builtins.c (get_builtin_sync_mem): Force address mode conversion.
+
 2018-09-26  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.h (enum reg_class): Remove FP_TOP_SSE_REGS

gcc/builtins.c

@@ -5850,6 +5850,7 @@ get_builtin_sync_mem (tree loc, machine_mode mode)
   scalar_int_mode addr_mode = targetm.addr_space.address_mode (addr_space);
 
   addr = expand_expr (loc, NULL_RTX, addr_mode, EXPAND_SUM);
+  addr = convert_memory_address (addr_mode, addr);
 
   /* Note that we explicitly do not want any alias information for this
      memory, so that we kill all other live memories.  Otherwise we don't