The conbine pass is perfectly happy if a splitter splits to just one
instruction (instead of two).
Committing to trunk.
Segher
2019-11-05 Segher Boessenkool <seg...@kernel.crashing.org>
* doc/md.texi (Insn Splitting): Fix combiner documentation.
---
gcc/doc/md.texi | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index 859ebed..19d6893 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -8371,7 +8371,7 @@ case that the pattern is @emph{not} matched by any
@code{define_insn}.
The combiner pass first tries to split a single @code{set} expression
and then the same @code{set} expression inside a @code{parallel}, but
followed by a @code{clobber} of a pseudo-reg to use as a scratch
-register. In these cases, the combiner expects exactly two new insn
+register. In these cases, the combiner expects exactly one or two new insn
patterns to be generated. It will verify that these patterns match some
@code{define_insn} definitions, so you need not do this test in the
@code{define_split} (of course, there is no point in writing a
--
1.8.3.1
