(eliminate_regs): Use new macros LOAD_EXTEND_OP and
WORD_REGISTER_OPERATION instead of BYTE_LOADS_*_EXTEND and
LOAD_EXTEND.
From-SVN: r5476
if (GET_CODE (new) == MEM
&& (GET_MODE_SIZE (GET_MODE (x))
<= GET_MODE_SIZE (GET_MODE (new)))
-#if defined(BYTE_LOADS_ZERO_EXTEND) || defined(BYTE_LOADS_SIGN_EXTEND)
+#ifdef LOAD_EXTEND_OP
/* On these machines we will be reloading what is
inside the SUBREG if it originally was a pseudo and
the inner and outer modes are both a word or