+Sat Oct 10 17:01:42 1998 Jeffrey A Law (law@cygnus.com)
+
+ * regmove.c (optimize_reg_copy_3): Honor TRULY_NOOP_TRUNCATION.
+
Fri Oct 9 22:08:05 1998 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* fp-bit.c (SFtype): Don't implicitly use int in declaration.
|| GET_CODE (SET_SRC (set)) != MEM
|| SET_DEST (set) != src_reg)
return;
+
+ /* Do not use a SUBREG to truncate from one mode to another if truncation
+ is not a nop. */
+ if (GET_MODE_BITSIZE (GET_MODE (src_reg)) <= GET_MODE_BITSIZE (GET_MODE (src))
+ && !TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (GET_MODE (src)),
+ GET_MODE_BITSIZE (GET_MODE (src_reg))))
+ return;
+
old_mode = GET_MODE (src_reg);
PUT_MODE (src_reg, GET_MODE (src));
XEXP (src, 0) = SET_SRC (set);