builtins.def (BUILT_IN_STACK_ALLOC): Remove.

        * builtins.def (BUILT_IN_STACK_ALLOC): Remove.
        * builtins.c (expand_builtin) <BUILT_IN_STACK_ALLOC>: Remove.
        * dwarf2out.c (loc_descriptor): Handle PARALLEL here ...
        (add_location_or_const_value_attribute): ... not here.  Use
        loc_descriptor_from_tree if possible.
        (loc_descriptor_from_tree_1): Rename from loc_descriptor_from_tree.
        Simplify address handling.  Handle DECL_VALUE_EXPR.  Handle register
        values specially.
        (loc_descriptor_from_tree): New.  Update callers.
        * expr.c (expand_var): Ignore DECL_VALUE_EXPR variables.
        * gimplify.c (gimplify_decl_expr): Lower variable sized types to
        pointer plus dereference.  Set DECL_VALUE_EXPR.  Set save_stack.
        (gimplify_call_expr): Do not recognize BUILT_IN_STACK_ALLOC
        and BUILT_IN_STACK_RESTORE.
        (gimplify_expr): Lower DECL_VALUE_EXPR decls.
        * stmt.c (expand_stack_alloc): Remove.
        * tree-mudflap.c (mx_register_decls): Don't look for
        BUILT_IN_STACK_ALLOC.
        * tree-nested.c (convert_local_reference): Likewise.
        * tree.h (DECL_VALUE_EXPR): New.
ada/
        * utils.c (gnat_install_builtins): Remove __builtin_stack_alloc,
        add __builtin_alloca.
fortran/
        * f95-lang.c (gfc_init_builtin_functions): Remove
         __builtin_stack_alloc, add __builtin_alloca.
        * trans-array.c (gfc_trans_auto_array_allocation): Use DECL_EXPR.
        * trans-decl.c (gfc_trans_auto_character_variable): Likewise.

From-SVN: r85794

1 files changed, 2 insertions, 14 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 7741830..282bb9a 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6008,20 +6008,8 @@ expand_var (tree var)
       ? !TREE_ASM_WRITTEN (var)
       : !DECL_RTL_SET_P (var))
     {
-      if (TREE_CODE (var) == VAR_DECL && DECL_DEFER_OUTPUT (var))
-	{
-	  /* Prepare a mem & address for the decl.  */
-	  rtx x;
-
-	  if (TREE_STATIC (var))
-	    abort ();
-
-	  x = gen_rtx_MEM (DECL_MODE (var),
-			   gen_reg_rtx (Pmode));
-
-	  set_mem_attributes (x, var, 1);
-	  SET_DECL_RTL (var, x);
-	}
+      if (TREE_CODE (var) == VAR_DECL && DECL_VALUE_EXPR (var))
+	/* Should be ignored.  */;
       else if (lang_hooks.expand_decl (var))
 	/* OK.  */;
       else if (TREE_CODE (var) == VAR_DECL && !TREE_STATIC (var))