Supporting de-virtualization for precise types.

Sharpening invoke-virtual and invoke-interface calls to invoke-direct for cases
where the type of "this" pointer in the invoke- params is precisely known.

Instructions that have an invoke opcode are marked as interesting, for each invoke-virtual/interface
we come across with a precise type for "this" we mark the location as a candidate for sharpening,
resolve the concrete method and save its method reference <DexFile, DexMethodIndex> to be sharpened
in CompilerDriver::ComputeInvokeInfo().

Added a new entry to AOT statistics showing the percentage of sharpened calls that were based on
type analysis.

Fix a minor bug in type creation for GetSuperClass(). Previously super class of a precise reference
had precise types created which is not necessarily the case.

Fixed DCHECK in Class::FindVirtualMethodForVirtual to handle cases for Miranda methods.

Sharpening only takes place for cases where no soft failures happen at verification time.

Change-Id: Ic027d0226d6f95260c1918014cb6313f2e0ca455
diff --git a/src/verifier/instruction_flags.cc b/src/verifier/instruction_flags.cc
index 823edde..358791d 100644
--- a/src/verifier/instruction_flags.cc
+++ b/src/verifier/instruction_flags.cc
@@ -29,7 +29,7 @@
     strncpy(encoding, "-----", sizeof(encoding));
     if (IsInTry())        encoding[kInTry] = 'T';
     if (IsBranchTarget()) encoding[kBranchTarget] = 'B';
-    if (IsGcPoint())      encoding[kGcPoint] = 'G';
+    if (IsCompileTimeInfoPoint())  encoding[kCompileTimeInfoPoint] = 'G';
     if (IsVisited())      encoding[kVisited] = 'V';
     if (IsChanged())      encoding[kChanged] = 'C';
   }