consistent.
* tm.texi (Costs): Say MOVE_RATIO is number of mem-mem move
*sequences* *below* which scalar moves will be used.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@22107
138bc75d-0d04-0410-961f-
82ee72b054a4
+Sun Aug 30 20:19:43 1998 Hans-Peter Nilsson <hp@axis.se>
+
+ * expr.c (expand_expr): Change ">" to ">=" making MOVE_RATIO use
+ consistent.
+ * tm.texi (Costs): Say MOVE_RATIO is number of mem-mem move
+ *sequences* *below* which scalar moves will be used.
+
Sun Aug 30 17:18:43 1998 Jeffrey A Law (law@cygnus.com)
* collect2.c (mktemp): Delete unused declaration.
&& (move_by_pieces_ninsns
(TREE_INT_CST_LOW (TYPE_SIZE (type))/BITS_PER_UNIT,
TYPE_ALIGN (type) / BITS_PER_UNIT)
- > MOVE_RATIO)
+ >= MOVE_RATIO)
&& ! mostly_zeros_p (exp))))
|| (modifier == EXPAND_INITIALIZER && TREE_CONSTANT (exp)))
{
@findex MOVE_RATIO
@item MOVE_RATIO
-The number of scalar move insns which should be generated instead of a
+The threshold of number of scalar memory-to-memory move insns, @emph{below}
+which a sequence of insns should be generated instead of a
string move insn or a library call. Increasing the value will always
make code faster, but eventually incurs high cost in increased code size.
+Note that on machines with no memory-to-memory move insns, this macro denotes
+the corresponding number of memory-to-memory @emph{sequences}.
+
If you don't define this, a reasonable default is used.
@findex NO_FUNCTION_CSE