[PATCH, Pointer Bounds Checker 6/x] New static constructor types

[Ilya Enkovich <enkovich dot gnu at gmail dot com>]

Hi,

This patch add new static constructor types used by Pointer Bounds Checker.  It was approved earlier for 4.9 and I'll assume patch is OK for trunk if no objections arise.

Patch was bootstrapped and tested for linux-x86_64.

Thanks,
Ilya
--
gcc/

2014-04-16  Ilya Enkovich  <ilya.enkovich@intel.com>

	* ipa.c (cgraph_build_static_cdtor_1): Support contructors
	with "chkp ctor" and "bnd_legacy" attributes.
	* gimplify.c (gimplify_init_constructor): Avoid infinite
	loop during gimplification of bounds initializer.


diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index 7441784..67ab515 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -3803,10 +3803,19 @@ gimplify_init_constructor (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
 	   individual element initialization.  Also don't do this for small
 	   all-zero initializers (which aren't big enough to merit
 	   clearing), and don't try to make bitwise copies of
-	   TREE_ADDRESSABLE types.  */
+	   TREE_ADDRESSABLE types.
+
+	   We cannot apply such transformation when compiling chkp static
+	   initializer because creation of initializer image in the memory
+	   will require static initialization of bounds for it.  It should
+	   result in another gimplification of similar initializer and we
+	   may fall into infinite loop.  */
 	if (valid_const_initializer
 	    && !(cleared || num_nonzero_elements == 0)
-	    && !TREE_ADDRESSABLE (type))
+	    && !TREE_ADDRESSABLE (type)
+	    && (!current_function_decl
+		|| !lookup_attribute ("chkp ctor",
+				      DECL_ATTRIBUTES (current_function_decl))))
 	  {
 	    HOST_WIDE_INT size = int_size_in_bytes (type);
 	    unsigned int align;
diff --git a/gcc/ipa.c b/gcc/ipa.c
index 26e9b03..5ab3aed 100644
--- a/gcc/ipa.c
+++ b/gcc/ipa.c
@@ -1345,9 +1345,11 @@ make_pass_ipa_whole_program_visibility (gcc::context *ctxt)
 }
 
 /* Generate and emit a static constructor or destructor.  WHICH must
-   be one of 'I' (for a constructor) or 'D' (for a destructor).  BODY
-   is a STATEMENT_LIST containing GENERIC statements.  PRIORITY is the
-   initialization priority for this constructor or destructor. 
+   be one of 'I' (for a constructor), 'D' (for a destructor), 'P'
+   (for chp static vars constructor) or 'B' (for chkp static bounds
+   constructor).  BODY is a STATEMENT_LIST containing GENERIC
+   statements.  PRIORITY is the initialization priority for this
+   constructor or destructor.
 
    FINAL specify whether the externally visible name for collect2 should
    be produced. */
@@ -1406,6 +1408,20 @@ cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final)
       DECL_STATIC_CONSTRUCTOR (decl) = 1;
       decl_init_priority_insert (decl, priority);
       break;
+    case 'P':
+      DECL_STATIC_CONSTRUCTOR (decl) = 1;
+      DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("chkp ctor"),
+					  NULL,
+					  NULL_TREE);
+      decl_init_priority_insert (decl, priority);
+      break;
+    case 'B':
+      DECL_STATIC_CONSTRUCTOR (decl) = 1;
+      DECL_ATTRIBUTES (decl) = tree_cons (get_identifier ("bnd_legacy"),
+					  NULL,
+					  NULL_TREE);
+      decl_init_priority_insert (decl, priority);
+      break;
     case 'D':
       DECL_STATIC_DESTRUCTOR (decl) = 1;
       decl_fini_priority_insert (decl, priority);
@@ -1423,9 +1439,11 @@ cgraph_build_static_cdtor_1 (char which, tree body, int priority, bool final)
 }
 
 /* Generate and emit a static constructor or destructor.  WHICH must
-   be one of 'I' (for a constructor) or 'D' (for a destructor).  BODY
-   is a STATEMENT_LIST containing GENERIC statements.  PRIORITY is the
-   initialization priority for this constructor or destructor.  */
+   be one of 'I' (for a constructor), 'D' (for a destructor), 'P'
+   (for chkp static vars constructor) or 'B' (for chkp static bounds
+   constructor).  BODY is a STATEMENT_LIST containing GENERIC
+   statements.  PRIORITY is the initialization priority for this
+   constructor or destructor.  */
 
 void
 cgraph_build_static_cdtor (char which, tree body, int priority)