Add declarations for contains_placeholder_p, substitute_in_{expr,type}.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@5580 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/tree.h b/gcc/tree.h
index e522dcd..2ece577 100644 (file)
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1220,6 +1220,27 @@ extern int lvalue_or_else                PROTO((tree, char *));
 
 extern tree save_expr                  PROTO((tree));
 
+/* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
+   or offset that depends on a field within a record.
+
+   Note that we only allow such expressions within simple arithmetic
+   or a COND_EXPR.  */
+
+extern int contains_placeholder_p      PROTO((tree));
+
+/* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
+   return a tree with all occurrences of references to F in a
+   PLACEHOLDER_EXPR replaced by R.   Note that we assume here that EXP
+   contains only arithmetic expressions.  */
+
+extern tree substitute_in_expr         PROTO((tree, tree, tree));
+
+/* Given a type T, a FIELD_DECL F, and a replacement value R,
+   return a new type with all size expressions that contain F
+   updated by replacing the reference to F with R.  */
+
+extern tree substitute_in_type         PROTO((tree, tree, tree));
+
 /* variable_size (EXP) is like save_expr (EXP) except that it
    is for the special case of something that is part of a
    variable size for a data type.  It makes special arrangements