Check ARC patches into arc-20081210-branch.arc-20081210-branch

git-svn-id: https://gcc.gnu.org/svn/gcc/branches/arc-20081210-branch@144652 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 7dfb46b3a0d..5e9a2792337 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -2758,6 +2758,12 @@ Do not define this macro if you do not define
 is @code{BITS_PER_WORD} bits wide is correct for your machine.
 @end defmac
 
+@deftypefn {Target Hook} bool TARGET_PRESERVE_RELOAD_P (rtx @var{in})
+Called when doing an input reload using the value @var{in}.  Return true
+if the reload register should be available for inheritance later.  This
+might increase the spill pressure, but enhances reload inheritance.
+@end deftypefn
+
 @defmac SMALL_REGISTER_CLASSES
 On some machines, it is risky to let hard registers live across arbitrary
 insns.  Typically, these machines have instructions that require values
@@ -5962,6 +5968,13 @@ will be used.  Defaults to 1 if @code{move_by_pieces_ninsns} returns less
 than @code{MOVE_RATIO}.
 @end defmac
 
+@defmac CAN_MOVE_BY_PIECES (@var{size}, @var{alignment})
+A C expression used to determine whether a chunk of memory is to be copied
+in pieces either by @code{move_by_pieces}, or by a movmem expander.  This
+is used by other optimizers that want to anticipate how a block copy is
+going to be done.  If not defined, MOVE_BY_PIECES_P is used instead.
+@end defmac
+
 @defmac MOVE_MAX_PIECES
 A C expression used by @code{move_by_pieces} to determine the largest unit
 a load or store used to copy memory is.  Defaults to @code{MOVE_MAX}.