tree-chkp.c (chkp_call_returns_bounds_p): Fix handling of bounds narrowing...

gcc/

	* tree-chkp.c (chkp_call_returns_bounds_p): Fix handling of
	bounds narrowing, already instrumented calls and calls to
	not instrumentable functions.

gcc/testsuite/

	* gcc.target/i386/chkp-narrow-bounds.c: New.

From-SVN: r220154

gcc/ChangeLog

+2015-01-27  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	* tree-chkp.c (chkp_call_returns_bounds_p): Fix handling of
+	bounds narrowing, already instrumented calls and calls to
+	not instrumentable functions.
+
 2015-01-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/64807

gcc/testsuite/ChangeLog

+2015-01-27  Ilya Enkovich  <ilya.enkovich@intel.com>
+
+	* gcc.target/i386/chkp-narrow-bounds.c: New.
+
 2015-01-27  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/64807

gcc/testsuite/gcc.target/i386/chkp-narrow-bounds.c

+/* { dg-do compile } */
+/* { dg-require-effective-target mpx } */
+/* { dg-options "-fcheck-pointer-bounds -mmpx -O2 -fdump-tree-chkp" } */
+/* { dg-final { scan-tree-dump "bndcl" "chkp" } } */
+/* { dg-final { scan-tree-dump "bndcu" "chkp" } } */
+/* { dg-final { cleanup-tree-dump "chkp" } } */
+
+int
+test (int *p)
+{
+  int *p1 = __bnd_narrow_ptr_bounds (p - 10, p, sizeof (int) * 20);
+  return p1[10];
+}

gcc/tree-chkp.c

@@ -2113,13 +2113,19 @@ chkp_call_returns_bounds_p (gcall *call)
   if (gimple_call_internal_p (call))
     return false;
 
+  if (gimple_call_builtin_p (call, BUILT_IN_CHKP_NARROW_PTR_BOUNDS)
+      || chkp_gimple_call_builtin_p (call, BUILT_IN_CHKP_NARROW))
+    return true;
+
+  if (gimple_call_with_bounds_p (call))
+    return true;
+
   tree fndecl = gimple_call_fndecl (call);
 
   if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_MD)
     return false;
 
-  if (fndecl
-      && lookup_attribute ("bnd_legacy", DECL_ATTRIBUTES (fndecl)))
+  if (fndecl && !chkp_instrumentable_p (fndecl))
     return false;
 
   if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)