[PATCH 5/9] regrename: Don't run if function was separately shrink-wrapped

[Segher Boessenkool]

Unfortunately even after the previous patch there are still a few cases
where regrename creates invalid code when used together with separate
shrink-wrapping.  I haven't found the cause of those.  This patch disables
regrename for functions that were separately shrink-wrapped.


2016-06-07  Segher Boessenkool  <segher@kernel.crashing.org>

	* regrename.c (gate): Disable regrename if shrink_wrapped_separate
	is set in crtl.

---
 gcc/regrename.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/regrename.c b/gcc/regrename.c
index 00a5d02..5740b1a 100644
--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -1956,7 +1956,11 @@ public:
   /* opt_pass methods: */
   virtual bool gate (function *)
     {
-      return (optimize > 0 && (flag_rename_registers));
+      /* regrename creates wrong code for exception handling, if used together
+         with separate shrink-wrapping.  Disable for now, until we have
+	 figured out what exactly is going on.  */
+      return (optimize > 0 && flag_rename_registers
+	      && !crtl->shrink_wrapped_separate);
     }
 
   virtual unsigned int execute (function *) { return regrename_optimize (); }
-- 
1.9.3