+2001-09-10 Richard Sandiford <rsandifo@redhat.com>
+
+ * calls.c (store_one_arg): Expand comment.
+
2001-09-10 Roman Lechtchinsky <rl@cs.tu-berlin.de>
* calls.c (store_one_arg): Make sure that the entire argument is
}
}
- /* If parm is passed both in stack and in register and offset is
- greater than reg_parm_stack_space, split the offset. */
+ /* Special handling is required if part of the parameter lies in the
+ register parameter area. The argument may be copied into the stack
+ slot using memcpy(), but the original contents of the register
+ parameter area will be restored after the memcpy() call.
+
+ To ensure that the part that lies in the register parameter area
+ is copied correctly, we emit a separate push for that part. This
+ push should be small enough to avoid a call to memcpy(). */
#ifndef STACK_PARMS_IN_REG_PARM_AREA
if (arg->reg && arg->pass_on_stack)
#else