Validate that all instructions dominate their inputs. And fix a bug where that did not happen.

lib/compiler/implementation/ssa/closure.dart

Index: lib/compiler/implementation/ssa/closure.dart
===================================================================
--- lib/compiler/implementation/ssa/closure.dart	(revision 8084)
+++ lib/compiler/implementation/ssa/closure.dart	(working copy)
@@ -436,8 +436,9 @@
 
   visitTryStatement(TryStatement node) {
     // TODO(ngeoffray): implement finer grain state.
+    bool oldInTryCatchOrFinally = inTryCatchOrFinally;

[Lasse Reichstein Nielsen, 2012/05/30 09:35:14]

Odd name. Could it be just "inTryStatement" since the catch and finally blocks
are part of the "try" statement?

[ngeoffray, 2012/05/30 10:19:07]

Done.

     inTryCatchOrFinally = true;
     node.visitChildren(this);
-    inTryCatchOrFinally = false;
+    inTryCatchOrFinally = oldInTryCatchOrFinally;
   }
 }