[PATCH] Run phi_only_cprop after 2nd VRP

[Richard Biener]

This moves the 2nd VRP pass to run befoe phi_only_cprop as
VRP performs jump-threading which can result in BBs with
PHI singletons.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2014-06-06  Richard Biener  <rguent...@suse.de>

        * passes.def: Move 2nd VRP pass before phi-only-cprop.

Index: gcc/passes.def
===================================================================
--- gcc/passes.def      (revision 211271)
+++ gcc/passes.def      (working copy)
@@ -240,13 +240,13 @@ along with GCC; see the file COPYING3.
       NEXT_PASS (pass_reassoc);
       NEXT_PASS (pass_strength_reduction);
       NEXT_PASS (pass_dominator);
+      NEXT_PASS (pass_vrp);
       /* The only const/copy propagation opportunities left after
-        DOM should be due to degenerate PHI nodes.  So rather than
+        DOM and VRP should be due to degenerate PHI nodes.  So rather than
         run the full propagators, run a specialized pass which
         only examines PHIs to discover const/copy propagation
         opportunities.  */
       NEXT_PASS (pass_phi_only_cprop);
-      NEXT_PASS (pass_vrp);
       NEXT_PASS (pass_cd_dce);
       NEXT_PASS (pass_tracer);
       NEXT_PASS (pass_dse);