| /* Caching values "in" trees |
| Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. |
| Contributed by Chris Lattner (sabre@nondot.org) |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 2, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| //===----------------------------------------------------------------------===// |
| // This code lets you to associate a void* with a tree, as if it were cached |
| // inside the tree: if the tree is garbage collected and reallocated, then the |
| // cached value will have been cleared. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CACHE_H |
| #define LLVM_CACHE_H |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "target.h" |
| #include "tree.h" |
| |
| /// llvm_has_cached - Returns whether a value has been associated with the tree. |
| extern bool llvm_has_cached(union tree_node *tree); |
| |
| /// llvm_get_cached - Returns the value associated with the tree, or NULL. |
| extern const void *llvm_get_cached(union tree_node *tree); |
| |
| /// llvm_set_cached - Associates the given value with the tree (and returns it). |
| /// To delete an association, pass NULL for the value. |
| extern const void *llvm_set_cached(union tree_node *tree, const void *val); |
| |
| /// llvm_replace_cached - Replaces all occurrences of old_val with new_val. |
| extern void llvm_replace_cached(const void *old_val, const void *new_val); |
| |
| #endif /* LLVM_CACHE_H */ |