X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fldstopt.h;h=16ae572610da33f7ecd95d781a24384e57bb33f8;hb=8eb0a1256d88d68e762c1f087bffadca68dc5c12;hp=1c270254d6547a3fc35564163d37d71b0b464f4e;hpb=17a74053a6ea817f1c31fcd21c82a9ecc84daa28;p=libfirm

diff --git a/ir/opt/ldstopt.h b/ir/opt/ldstopt.h
index 1c270254d..16ae57261 100644
--- a/ir/opt/ldstopt.h
+++ b/ir/opt/ldstopt.h
@@ -25,7 +25,25 @@
  *
  * Removes redundand non-volatile Loads and Stores.
  * May introduce Bad nodes if exceptional control flow
- * is removed.
+ * is removed. The following cases are optimized:
+ *
+ * Load without result: A Load which has only a memory use
+ *   is removed.
+ *
+ * Load after Store: A Load after a Store is removed, if
+ *   the Load doesn't have an exception handler or is in
+ *   the same block as the Store.
+ *
+ * Load after Load: A Load after a Load is removed, if the
+ *   Load doesn't have an exception handler or is in the
+ *   same block as the previous Load.
+ *
+ * Store before Store: A Store immediately before another
+ *   Store in the same block is removed, if the Store doesn't
+ *   have an exception handler.
+ *
+ * Store after Load: A Store after a Load is removed, if the
+ *   Store doesn't have an exception handler.
  */
 void optimize_load_store(ir_graph *irg);