[PATCH] Remove current_function_decl usage from get_polymorphic_call_info

[Ilya Enkovich]

Hi,

Testing 'mpx' branch after merge with trunk I got a segfault in ipa-devirt.c.  
It appears that cgraph_node cloning with indirect edge causes call to 
get_polymorphic_call_info which uses current_function_decl.  It happens in IPA 
pass and therefore current_function_decl is NULL which causes segfault.  Also 
even within a GIMPLE pass it seems wrong to use current_function_decl because 
examined call may belong to another function and passed fndecl should be used 
instead.

Proposed patch was bootstrapped and regtested on linux-x86_64.  OK for trunk?

Thanks,
Ilya
--

2014-08-13  Ilya Enkovich  <ilya.enkov...@intel.com>

        * ipa-devirt.c (get_polymorphic_call_info): Use fndecl instead of
        current_function_decl.


diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c
index 3650b43..0f38655 100644
--- a/gcc/ipa-devirt.c
+++ b/gcc/ipa-devirt.c
@@ -2319,7 +2319,7 @@ get_polymorphic_call_info (tree fndecl,
                     = decl_maybe_in_construction_p (base,
                                                     context->outer_type,
                                                     call,
-                                                    current_function_decl);
+                                                    fndecl);
                  return base;
                }
              else