[PATCH] doc: -falign-functions doesn't override the __attribute__((align(N)))

[Palmer Dabbelt <palmer@rivosinc.com>]

I found this when reading the documentation for Kito's recent patch.
From the discussion it sounds like this is the desired behavior, so
let's document it.

gcc/doc/ChangeLog

	* invoke.texi (-falign-functions): Mention __align__
---
 gcc/doc/invoke.texi | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 2a9ea3455f6..8326a60dcf1 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -13136,7 +13136,9 @@ effective only in combination with @option{-fstrict-aliasing}.
 Align the start of functions to the next power-of-two greater than or
 equal to @var{n}, skipping up to @var{m}-1 bytes.  This ensures that at
 least the first @var{m} bytes of the function can be fetched by the CPU
-without crossing an @var{n}-byte alignment boundary.
+without crossing an @var{n}-byte alignment boundary.  This does not override
+functions that otherwise specify their own alignment constraints, such as via
+an alignment attribute.
 
 If @var{m} is not specified, it defaults to @var{n}.
 
-- 
2.34.1