Ensure the graph is correctly typed.

We used to be forgiving because of HIntConstant(0) also being
used for null. We now create a special HNullConstant for such uses.

Also, we need to run the dead phi elimination twice during ssa
building to ensure the correctness.

Change-Id: If479efa3680d3358800aebb1cca692fa2d94f6e5

1 files changed, 2 insertions, 0 deletions

diff --git a/compiler/optimizing/ssa_builder.h b/compiler/optimizing/ssa_builder.h
index 2eec87b618..148e9590c3 100644
--- a/compiler/optimizing/ssa_builder.h
+++ b/compiler/optimizing/ssa_builder.h
@@ -58,6 +58,8 @@ class SsaBuilder : public HGraphVisitor {
                                                   HInstruction* instruction,
                                                   Primitive::Type type);
 
+  static HInstruction* GetReferenceTypeEquivalent(HInstruction* instruction);
+
  private:
   // Locals for the current block being visited.
   HEnvironment* current_locals_;