RISC-V: Add -mtune=thead-c906 to the invoke docs

gcc/ChangeLog

	* doc/invoke.texi (RISC-V): Document -mtune=thead-c906.

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 81d13f4..fb50636 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -28164,7 +28164,7 @@ Permissible values for this option are: @samp{sifive-e20}, @samp{sifive-e21},
 Optimize the output for the given processor, specified by microarchitecture or
 particular CPU name.  Permissible values for this option are: @samp{rocket},
 @samp{sifive-3-series}, @samp{sifive-5-series}, @samp{sifive-7-series},
-@samp{size}, and all valid options for @option{-mcpu=}.
+@samp{thead-c906}, @samp{size}, and all valid options for @option{-mcpu=}.
 
 When @option{-mtune=} is not specified, use the setting from @option{-mcpu},
 the default is @samp{rocket} if both are not specified.