- handle failure of getpwuid() more gracefully

[libfirm] / include / libfirm / iroptimize.h

diff --git a/include/libfirm/iroptimize.h b/include/libfirm/iroptimize.h
index 1b8dfb8..590acc7 100644 (file)
--- a/include/libfirm/iroptimize.h
+++ b/include/libfirm/iroptimize.h
@@ -417,15 +417,23 @@ void normalize_n_returns(ir_graph *irg);
  * with atomic values if possible. Does not handle classes yet.
  *
  * @param irg  the graph which should be optimized
+ *
+ * @return non-zero, if at least one entity was replaced
  */
-void scalar_replacement_opt(ir_graph *irg);
+int scalar_replacement_opt(ir_graph *irg);
 
 /** Performs strength reduction for the passed graph. */
 void reduce_strength(ir_graph *irg);
 
 /**
- * Optimizes simple tail-recursion calls by
- * converting them into loops. Depends on the flag opt_tail_recursion.
+ * Optimizes tail-recursion calls by converting them into loops.
+ * Depends on the flag opt_tail_recursion.
+ * Currently supports the following forms:
+ *  - return func();
+ *  - return x + func();
+ *  - return func() - x;
+ *  - return x * func();
+ *  - return -func();
  *
  * Does not work for Calls that use the exception stuff.
  *