Fix ContainerTypeMask== and ContainerTypeMask.hashCode.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(revision 30759)
+++ sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(working copy)
@@ -3958,6 +3958,9 @@
     }
     HInstruction newInstance = stack.last;
     if (isFixedList) {
+      // Overwrite the element type, in case the allocation site has
+      // been inlined.
+      newInstance.instructionType = elementType;

[lukas, 2013/11/28 13:06:23]

I don't understand this part.

[ngeoffray, 2013/11/28 13:08:58]

It's not related to the bug, just something I discovered while debugging.
Basically, inlining will generate an instruction that may at the end not have
the type the inferrer found, for example:
JS('UInt32Array', 'new UInt32Array()')

The inferrer actually knows more about the type, so we just use what the
inferrer found.

       JavaScriptItemCompilationContext context = work.compilationContext;
       context.allocatedFixedLists.add(newInstance);
     }