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Diffstat (limited to 'gcc/tm.texi')
| -rw-r--r-- | gcc/tm.texi | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/tm.texi b/gcc/tm.texi index eab7b2e4a0b..746c4918248 100644 --- a/gcc/tm.texi +++ b/gcc/tm.texi @@ -4775,12 +4775,13 @@ than good.) @findex MOVE_RATIO @item MOVE_RATIO The threshold of number of scalar memory-to-memory move insns, @emph{below} -which a sequence of insns should be generated instead of a +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}. +Note that on machines where the corresponding move insn is a +@code{define_expand} that emits a sequence of insns, this macro counts +the number of such sequences. If you don't define this, a reasonable default is used. |