docs: document new param

gcc/ChangeLog:

	* doc/invoke.texi: Document ira-simple-lra-insn-threshold.

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 51447a7..26de582 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -15511,6 +15511,9 @@ available alternatives for preferred register class even if it has
 found some choice with an appropriate register class and respect the
 found qualified matching constraint.
 
+@item ira-simple-lra-insn-threshold
+Approximate function insn number in 1K units triggering simple local RA.
+
 @item lra-inheritance-ebb-probability-cutoff
 LRA tries to reuse values reloaded in registers in subsequent insns.
 This optimization is called inheritance.  EBB is used as a region to