[PATCH, CHKP, Committed] Don't try to clone instrumented thunks

[Ilya Enkovich]

Hi,

When thunk is cloned, its callee is temporarily set to original thunks's target 
which is later also cloned.  Thus we should be more careful when clonning 
node's thunks.  Bootstrapped and tested on x86_64-unknown-linux-gnu.  Applied 
to trunk.

Thanks,
Ilya
--
2015-03-19  Ilya Enkovich  <ilya.enkov...@intel.com>

        * ipa-chkp.c (chkp_maybe_create_clone): Don't try to
        clone instrumented thunks.


diff --git a/gcc/ipa-chkp.c b/gcc/ipa-chkp.c
index 3bea06a..a9933e2 100644
--- a/gcc/ipa-chkp.c
+++ b/gcc/ipa-chkp.c
@@ -592,7 +592,8 @@ chkp_maybe_create_clone (tree fndecl)
       /* Clone all thunks.  */
       for (e = node->callers; e; e = e->next_caller)
        if (e->caller->thunk.thunk_p
-           && !e->caller->thunk.add_pointer_bounds_args)
+           && !e->caller->thunk.add_pointer_bounds_args
+           && !e->caller->instrumentation_clone)
          {
            struct cgraph_node *thunk
              = chkp_maybe_create_clone (e->caller->decl);