-/* Clear RTX_UNCHANGING_P flag of incoming argument MEMs. */
-
-static void
-purge_mem_unchanging_flag (rtx x)
-{
- RTX_CODE code;
- int i, j;
- const char *fmt;
-
- if (x == NULL_RTX)
- return;
-
- code = GET_CODE (x);
-
- if (code == MEM)
- {
- if (RTX_UNCHANGING_P (x)
- && (XEXP (x, 0) == current_function_internal_arg_pointer
- || (GET_CODE (XEXP (x, 0)) == PLUS
- && XEXP (XEXP (x, 0), 0) ==
- current_function_internal_arg_pointer
- && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT)))
- RTX_UNCHANGING_P (x) = 0;
- return;
- }
-
- /* Scan all subexpressions. */
- fmt = GET_RTX_FORMAT (code);
- for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++)
- {
- if (*fmt == 'e')
- purge_mem_unchanging_flag (XEXP (x, i));
- else if (*fmt == 'E')
- for (j = 0; j < XVECLEN (x, i); j++)
- purge_mem_unchanging_flag (XVECEXP (x, i, j));
- }
-}
-
-