+2006-02-14 Adam Nemet <anemet@caviumnetworks.com>
+
+ * simplify-rtx.c (simplify_subreg): Combine SUBREG and TRUNCATE.
+
2006-02-14 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE>
PR bootstrap/26053
return NULL_RTX;
}
+ /* Merge implicit and explicit truncations. */
+
+ if (GET_CODE (op) == TRUNCATE
+ && GET_MODE_SIZE (outermode) < GET_MODE_SIZE (innermode)
+ && subreg_lowpart_offset (outermode, innermode) == byte)
+ return simplify_gen_unary (TRUNCATE, outermode, XEXP (op, 0),
+ GET_MODE (XEXP (op, 0)));
+
/* SUBREG of a hard register => just change the register number
and/or mode. If the hard register is not valid in that mode,
suppress this simplification. If the hard register is the stack,