re PR inline-asm/85022 (internal compiler error: in write_dependence_p, at alias.c:3003)

	PR inline-asm/85022
	* emit-rtl.c (init_emit_regs): Indicate that VOIDmode MEMs don't have
	known size by default.

From-SVN: r258823

gcc/ChangeLog

+2018-03-23  Jakub Jelinek  <jakub@redhat.com>
+
+	PR inline-asm/85022
+	* emit-rtl.c (init_emit_regs): Indicate that VOIDmode MEMs don't have
+	known size by default.
+
 2018-03-23  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR inline-asm/85030

gcc/emit-rtl.c

@@ -6152,7 +6152,7 @@ init_emit_regs (void)
       attrs = ggc_cleared_alloc<mem_attrs> ();
       attrs->align = BITS_PER_UNIT;
       attrs->addrspace = ADDR_SPACE_GENERIC;
-      if (mode != BLKmode)
+      if (mode != BLKmode && mode != VOIDmode)
 	{
 	  attrs->size_known_p = true;
 	  attrs->size = GET_MODE_SIZE (mode);