[committed] loop-iv: make find_simple_exit static

[Roman Zhuykov via Gcc-patches]

This patch marks find_simple_exit function as static.
Committed as r10-7107 after successful bootstrap on x86_64 and powerpc64le.

Roman

--
Function 'find_simple_exit' is used only from loop-iv.c
In 2004-2006 it was also used in predict.c, but since r118694
(992c31e62304ed5d34247dbdef2db276d08fac05) it does not.

gcc/ChangeLog:
        * loop-iv.c (find_simple_exit): Make it static.
        * cfgloop.h: Remove the corresponding prototype.

diff --git a/gcc/cfgloop.h b/gcc/cfgloop.h
index 11378cadd41..1c49a8b8c2d 100644
--- a/gcc/cfgloop.h
+++ b/gcc/cfgloop.h
@@ -499,7 +499,6 @@ extern bool iv_analyze_expr (rtx_insn *, scalar_int_mode, 
rtx,
                             class rtx_iv *);
 extern rtx get_iv_value (class rtx_iv *, rtx);
 extern bool biv_p (rtx_insn *, scalar_int_mode, rtx);
-extern void find_simple_exit (class loop *, class niter_desc *);
 extern void iv_analysis_done (void);
 
 extern class niter_desc *get_simple_loop_desc (class loop *loop);
diff --git a/gcc/loop-iv.c b/gcc/loop-iv.c
index 6a59954f60a..d7b3d90f047 100644
--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -2915,7 +2915,7 @@ check_simple_exit (class loop *loop, edge e, class 
niter_desc *desc)
 
 /* Finds a simple exit of LOOP and stores its description into DESC.  */
 
-void
+static void
 find_simple_exit (class loop *loop, class niter_desc *desc)
 {
   unsigned i;