values may die at every use

[libfirm] / ir / be / bespill.h

diff --git a/ir/be/bespill.h b/ir/be/bespill.h
index 10b31d9..cc7bf9d 100644 (file)
--- a/ir/be/bespill.h
+++ b/ir/be/bespill.h
@@ -30,6 +30,7 @@ spill_env_t *be_new_spill_env(const be_chordal_env_t *chordal);
 /**
  * Marks a phi-node for spilling. So when reloading from this phi-node, not
  * only its value but the whole phi will be spilled.
+ * This might place be_Copy nodes in predecessor blocks.
  */
 void be_spill_phi(spill_env_t *env, ir_node *node);