+/**
+ * Check, if one value dominates the other.
+ * The dominance is strict here.
+ * @param a The first node.
+ * @param b The second node.
+ * @return 1 if a dominates b, 0 else.
+ */
+static INLINE int _value_strictly_dominates(const ir_node *a, const ir_node *b)
+{
+ const ir_node *block_a = get_block(a);
+ const ir_node *block_b = get_block(b);
+
+ /*
+ * a and b are not in the same block,
+ * so dominance is determined by the dominance of the blocks.
+ */
+ if(block_a != block_b) {
+ return block_dominates(block_a, block_b);
+ }
+
+ /*
+ * Dominance is determined by the time steps of the schedule.
+ */
+ return _value_strictly_dominates_intrablock(a, b);
+}
+