[4.9] Switch gcc-4.9 to use google/gcc-4_9 branch.

This source drop uses svn version r212828 of google/gcc-4.9 branch.
We also cherry-picked r213062, r213063 and r213064 to fix windows
build issues.
All gcc-4.9 patches before July 3rd are ported to google/gcc-4.9.
The following prior commits has not been merged to google branch yet.
(They are included in this commit).
e7af147f979e657fe2df00808e5b4319b0e088c6,
baf87df3cb2683649ba7e9872362a7e721117c23, and
c231900e5dcc14d8296bd9f62b45997a49d4d5e7.

Change-Id: I4bea3ea470387ff751c2be4cb0d4a12059b9299b

1 files changed, 55 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/langhooks.c b/gcc-4.9/gcc/langhooks.c
index d00ebd8a0..3b2081d42 100644
--- a/gcc-4.9/gcc/langhooks.c
+++ b/gcc-4.9/gcc/langhooks.c
@@ -103,6 +103,48 @@ lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
   return NULL_TREE;
 }
 
+void
+lhd_do_nothing_u (unsigned ARG_UNUSED (t))
+{
+}
+
+int
+lhd_do_nothing_t_return_int (tree ARG_UNUSED (t))
+{
+  return false;
+}
+
+bool
+lhd_do_nothing_t_return_bool (tree ARG_UNUSED (t))
+{
+  return false;
+}
+
+
+void
+lhd_do_nothing_t_t (tree ARG_UNUSED (t), tree ARG_UNUSED (t2))
+{
+}
+
+int
+lhd_do_nothing_t_t_return_int (tree ARG_UNUSED (t), tree ARG_UNUSED (t2))
+{
+  return 1;
+}
+
+bool
+lhd_do_nothing_t_vp_return_bool (tree ARG_UNUSED (t), void * ARG_UNUSED (t2))
+{
+  return true;
+}
+
+/* Do nothing (tree, tree). Return NULL_TREE.  */
+tree
+lhd_do_nothing_t_t_return_null_tree (tree ARG_UNUSED (t), tree ARG_UNUSED (t2))
+{
+  return NULL_TREE;
+}
+
 /* The default post options hook.  */
 
 bool
@@ -515,6 +557,13 @@ lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
   return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
 }
 
+/* Finalize clause C.  */
+
+void
+lhd_omp_finish_clause (tree, gimple_seq *)
+{
+}
+
 /* Register language specific type size variables as potentially OpenMP
    firstprivate variables.  */
 
@@ -616,6 +665,12 @@ lhd_builtin_function (tree decl)
   return decl;
 }
 
+bool
+lhd_user_conv_function_p (tree decl ATTRIBUTE_UNUSED)
+{
+  return false;
+}
+
 /* Create a builtin type.  */
 
 tree