-/** There are two implementations of the Phi node construction. The first
- * is faster, but does not work for blocks with more than 2 predecessors.
- * The second works always but is slower and causes more unnecessary Phi
- * nodes.
- * Select the implementations by the following preprocessor flag: */
-#define USE_FAST_PHI_CONSTRUCTION 0
-
-/** Further there are two versions of the fast Phi node construction.
- * If the following flag is set, new_r_Phi_in uses an explicit stack for
- * allocating and deallocating Phi nodes. Else it uses the obstack
- * as a stack! */
-#define USE_EXPLICIT_PHI_IN_STACK 0
-