Fix dominatedUsers for phis.

lib/compiler/implementation/ssa/nodes.dart

Index: lib/compiler/implementation/ssa/nodes.dart
diff --git a/lib/compiler/implementation/ssa/nodes.dart b/lib/compiler/implementation/ssa/nodes.dart
index 38d94e52371636cce5e4a3b41703e16e48a78331..935d56e48aabe7eadd09cb0323fde6bf0260bb64 100644
--- a/lib/compiler/implementation/ssa/nodes.dart
+++ b/lib/compiler/implementation/ssa/nodes.dart
@@ -975,6 +975,10 @@ class HInstruction implements Hashable {
         current = current.next;
       }
     }
+    // Phis are before [other] too.

[kasperl, 2012/08/06 10:31:03]

Newline before this (to match the rest of the method). I would also consider
maintaining usersInCurrentBlock and dealing with the same way as for the other
instructions (check that it is greater than zero before running through the
phis, etc.). If not, you should add a comment that explains why that isn't
necessary.

Maybe it would be nicer if you dealt with the phis before the rest -- logically
the phis are before the first instruction in other, right?

[floitsch, 2012/08/06 14:05:27]

Done.

+    for (HPhi phi = otherBlock.phis.first; phi != null; phi = phi.next) {

[kasperl, 2012/08/06 10:31:03]

!== null

[floitsch, 2012/08/06 14:05:27]

Done.

+      users.remove(phi);
+    }
 
     return users;
   }