[PATCH, Pointer Bounds Checker 13/x] Early versioning

[Ilya Enkovich]

Hi,

This patch allows to perform function versioning when some structures are not 
available yet.  It is required to make clones for Pointer Bounds Checker right 
after SSA build.

Bootstrapped and tested on linux-x86_64.

Thanks,
Ilya
--
gcc/

2014-05-29  Ilya Enkovich  <ilya.enkov...@intel.com>

        * tree-inline.c (copy_cfg_body): Check loop tree
        existence before accessing it.
        (tree_function_versioning): Check DF info existence
        before accessing it.

diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c
index 4293241..23fef90 100644
--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -2544,7 +2544,8 @@ copy_cfg_body (copy_body_data * id, gcov_type count, int 
frequency_scale,
 
   /* If the loop tree in the source function needed fixup, mark the
      destination loop tree for fixup, too.  */
-  if (loops_for_fn (src_cfun)->state & LOOPS_NEED_FIXUP)
+  if (loops_for_fn (src_cfun)
+      && loops_for_fn (src_cfun)->state & LOOPS_NEED_FIXUP)
     loops_state_set (LOOPS_NEED_FIXUP);
 
   if (gimple_in_ssa_p (cfun))
@@ -5350,8 +5351,9 @@ tree_function_versioning (tree old_decl, tree new_decl,
   DECL_ARGUMENTS (new_decl) = DECL_ARGUMENTS (old_decl);
   initialize_cfun (new_decl, old_decl,
                   old_entry_block->count);
-  DECL_STRUCT_FUNCTION (new_decl)->gimple_df->ipa_pta
-    = id.src_cfun->gimple_df->ipa_pta;
+  if (DECL_STRUCT_FUNCTION (new_decl)->gimple_df)
+    DECL_STRUCT_FUNCTION (new_decl)->gimple_df->ipa_pta
+      = id.src_cfun->gimple_df->ipa_pta;
 
   /* Copy the function's static chain.  */
   p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;