* gcc-interface/decl.c (gnat_to_gnu_param): Set the restrict qualifier

	on references built for parameters which aren't specifically by-ref.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182202 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index e8ce2e6..6a2dd26 100644 (file)
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,5 +1,10 @@
 2011-12-11  Eric Botcazou  <ebotcazou@adacore.com>
 
+       * gcc-interface/decl.c (gnat_to_gnu_param): Set the restrict qualifier
+       on references built for parameters which aren't specifically by-ref.
+
+2011-12-11  Eric Botcazou  <ebotcazou@adacore.com>
+
        * gcc-interface/decl.c (gnat_to_gnu_entity) <object>: If there is an
        alignment set on a renaming, assert that the renamed object is aligned
        enough as to make it possible to honor it.

diff --git a/gcc/ada/gcc-interface/decl.c b/gcc/ada/gcc-interface/decl.c
index aecbd76..c3774f2 100644 (file)
--- a/gcc/ada/gcc-interface/decl.c
+++ b/gcc/ada/gcc-interface/decl.c
@@ -5518,7 +5518,15 @@ gnat_to_gnu_param (Entity_Id gnat_param, Mechanism_Type mech,
                   || (!foreign
                       && default_pass_by_ref (gnu_param_type)))))
     {
+      /* We take advantage of 6.2(12) by considering that references built for
+        parameters whose type isn't by-ref and for which the mechanism hasn't
+        been forced to by-ref are restrict-qualified in the C sense.  */
+      bool restrict_p
+       = !TREE_ADDRESSABLE (gnu_param_type) && mech != By_Reference;
       gnu_param_type = build_reference_type (gnu_param_type);
+      if (restrict_p)
+       gnu_param_type
+         = build_qualified_type (gnu_param_type, TYPE_QUAL_RESTRICT);
       by_ref = true;
 
       /* In some ABIs, e.g. SPARC 32-bit, fat pointer types are themselves