r143211 - in /trunk/gcc: ChangeLog config/i386/...

[jakub at gcc dot gnu dot org]

Author: jakub
Date: Fri Jan  9 17:12:40 2009
New Revision: 143211

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143211
Log:
	PR target/38686
	PR target/38708
	* config/i386/i386.c (override_options): Reject
	-mstringop-strategy=rep_8byte with -m32.
	(ix86_expand_movmem): For size_needed == 1 set epilogue_size_needed
	to 1.  Do count comparison against epilogue_size_needed at compile
	time even when count_exp was constant forced into register.  For
	size_needed don't jump to epilogue, instead just avoid aligning
	and invoke the body algorithm.  If need_zero_guard, add zero guard
	even if count is non-zero, but smaller than size_needed + number of
	bytes that could be stored for alignment.
	(ix86_expand_setmem): For size_needed == 1 set epilogue_size_needed
	to 1.  If need_zero_guard, add zero guard even if count is non-zero,
	but smaller than size_needed + number of bytes that could be stored
	for alignment.  Compare size_needed with epilogue_size_needed instead
	of desired_align - align, don't adjust size_needed, pass
	epilogue_size_needed to the epilogue expanders.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c