[committed] fix typo in find_jump_threads_backwards()

[Aldy Hernandez]

One typo I caused, and one that was already there :).

Fixed both.

commit eecc0d1efb049a057af214764bea6256db07828e
Author: aldyh <aldyh@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Tue Nov 21 11:39:51 2017 +0000

            * tree-ssa-threadbackward.c (find_jump_threads_backwards): Fix
            typo in comment.
    
diff --git a/gcc/tree-ssa-threadbackward.c b/gcc/tree-ssa-threadbackward.c
index 6fdbc9039f9..f3f55cf4b44 100644
--- a/gcc/tree-ssa-threadbackward.c
+++ b/gcc/tree-ssa-threadbackward.c
@@ -732,7 +732,7 @@ thread_jumps::fsm_find_control_statement_thread_paths (tree name)
 
    It is assumed that BB ends with a control statement and that by
    finding a path where NAME is a constant, we can thread the path.
-   SPEED_P_ indicate that we could increase code size to improve the
+   SPEED_P indicates that we could increase code size to improve the
    code path.  */
 
 void