[PATCH] Add explicit description for -finline

[Xiong Hu Luo]

-finline is not a explicit option, search word "-finline" in page
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#Optimize-Options
will miss the explicit option "-fno-inline".

gcc/ChangeLog:

	2019-11-01  Xiong Hu Luo  <luoxhu@linux.ibm.com>

	doc/invoke.texi (inline): Add description for -finline.
---
 gcc/doc/invoke.texi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 1407d019d14..08fc02e1cd3 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -8576,6 +8576,9 @@ optimizing.
 Single functions can be exempted from inlining by marking them
 with the @code{noinline} attribute.
 
+@code{-finline} enables inlining of function declared \"inline\".
+@code{-finline} is enabled at levels -O1, -O2, -O3 and -Os, but not -Og.
+
 @item -finline-small-functions
 @opindex finline-small-functions
 Integrate functions into their callers when their body is smaller than expected
-- 
2.21.0.777.g83232e3864