1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/analysis/simple-match.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,43 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +// This executes a very simple search for all functions that call a
1.9 +// given set of functions. It's intended to be the simplest possible
1.10 +// way of refactoring a common pattern of function calls. Of course,
1.11 +// it's still up to a human to decide if the replacement is truely
1.12 +// suitable, but this gets the low-hanging fruit.
1.13 +
1.14 +// Expects the variable 'patterns' to hold an object with replacement
1.15 +// function names as keys and function lists as values. Any function
1.16 +// in the tested source that calls all of the functions named in the
1.17 +// list will be listed in the output as being likely candidates to
1.18 +// instead call the replacement function.
1.19 +
1.20 +include("unstable/lazy_types.js");
1.21 +
1.22 +var matches = {};
1.23 +
1.24 +function identity(x) x;
1.25 +
1.26 +function process_cp_pre_genericize(fndecl)
1.27 +{
1.28 + var c = [];
1.29 + function calls(t, stack)
1.30 + {
1.31 + try {
1.32 + t.tree_check(CALL_EXPR);
1.33 + var fn = callable_arg_function_decl(CALL_EXPR_FN(t));
1.34 + if (fn)
1.35 + c.push(decl_name_string(fn));
1.36 + }
1.37 + catch (e if e.TreeCheckError) { }
1.38 + }
1.39 +
1.40 + walk_tree(DECL_SAVED_TREE(fndecl), calls);
1.41 +
1.42 + for (let [fnreplace, pattern] in patterns)
1.43 + if (pattern.map(function(e){ return c.some(function(f) { return e == f; }); }).every(identity))
1.44 + if (fnreplace != (n = decl_name_string(fndecl)))
1.45 + print(fnreplace +" could probably be used in "+ n);
1.46 +}
