+ case MEM:
+ {
+ rtx base = NULL_RTX, offset = 0;
+ rtx addr = XEXP (x, 0);
+
+ if (GET_CODE (addr) == PRE_DEC || GET_CODE (addr) == PRE_INC
+ || GET_CODE (addr) == POST_DEC || GET_CODE (addr) == POST_INC)
+ {
+ val.base = XEXP (addr, 0);
+ val.start = -GET_MODE_SIZE (GET_MODE (x));
+ val.end = GET_MODE_SIZE (GET_MODE (x));
+ val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
+ return val;
+ }
+
+ if (GET_CODE (addr) == PRE_MODIFY || GET_CODE (addr) == POST_MODIFY)
+ {
+ if (GET_CODE (XEXP (addr, 1)) == PLUS
+ && XEXP (addr, 0) == XEXP (XEXP (addr, 1), 0)
+ && CONSTANT_P (XEXP (XEXP (addr, 1), 1)))
+ {
+ val.base = XEXP (addr, 0);
+ val.start = -INTVAL (XEXP (XEXP (addr, 1), 1));
+ val.end = INTVAL (XEXP (XEXP (addr, 1), 1));
+ val.safe = REGNO (val.base) == STACK_POINTER_REGNUM;
+ return val;
+ }
+ }
+
+ if (GET_CODE (addr) == CONST)
+ {
+ addr = XEXP (addr, 0);
+ all_const = 1;
+ }
+ if (GET_CODE (addr) == PLUS)
+ {
+ if (CONSTANT_P (XEXP (addr, 0)))
+ {
+ base = XEXP (addr, 1);
+ offset = XEXP (addr, 0);
+ }
+ else if (CONSTANT_P (XEXP (addr, 1)))
+ {
+ base = XEXP (addr, 0);
+ offset = XEXP (addr, 1);
+ }
+ }
+
+ if (offset == 0)
+ {
+ base = addr;
+ offset = const0_rtx;
+ }
+ if (GET_CODE (offset) == CONST)
+ offset = XEXP (offset, 0);
+ if (GET_CODE (offset) == PLUS)
+ {
+ if (GET_CODE (XEXP (offset, 0)) == CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 1));
+ offset = XEXP (offset, 0);
+ }
+ else if (GET_CODE (XEXP (offset, 1)) == CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, XEXP (offset, 0));
+ offset = XEXP (offset, 1);
+ }
+ else
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, offset);
+ offset = const0_rtx;
+ }
+ }
+ else if (GET_CODE (offset) != CONST_INT)
+ {
+ base = gen_rtx_PLUS (GET_MODE (base), base, offset);
+ offset = const0_rtx;
+ }
+
+ if (all_const && GET_CODE (base) == PLUS)
+ base = gen_rtx_CONST (GET_MODE (base), base);
+
+ gcc_assert (GET_CODE (offset) == CONST_INT);
+
+ val.start = INTVAL (offset);
+ val.end = val.start + GET_MODE_SIZE (GET_MODE (x));
+ val.base = base;
+ }
+ break;
+
+ case REG: