* gimple-low.c (expand_var_p): Don't look at TREE_ADDRESSABLE,

        TREE_THIS_VOLATILE, may_aliases, or optimization level.
        (remove_useless_vars): Dump debugging info.
        (expand_used_vars): Move ...
        * cfgexpand.c (expand_used_vars): ... here.  Make static.
        * tree-flow-inline.h (set_is_used): New.
        (set_default_def): Use get_var_ann.
        * tree-flow.h: Update decls.
        * tree-ssa-live.c (mark_all_vars_used_1, mark_all_vars_used): New.
        (create_ssa_var_map): Use it.
        * tree-ssa.c (set_is_used): Remove.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@85034 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 11 insertions, 3 deletions

diff --git a/gcc/tree-flow-inline.h b/gcc/tree-flow-inline.h
index 08dc0eff275..d48f2055ca4 100644
--- a/gcc/tree-flow-inline.h
+++ b/gcc/tree-flow-inline.h
@@ -421,6 +421,16 @@ phi_arg_from_edge (tree phi, edge e)
   return -1;
 }
 
+/* Mark VAR as used, so that it'll be preserved during rtl expansion.  */
+
+static inline void
+set_is_used (tree var)
+{
+  var_ann_t ann = get_var_ann (var);
+  ann->used = 1;
+}
+
+
 /*  -----------------------------------------------------------------------  */
 
 /* Return true if T is an executable statement.  */
@@ -453,9 +463,7 @@ is_label_stmt (tree t)
 static inline void
 set_default_def (tree var, tree def)
 {
-  var_ann_t ann = var_ann (var);
-  if (ann == NULL)
-    ann = create_var_ann (var);
+  var_ann_t ann = get_var_ann (var);
   ann->default_def = def;
 }