Improve compile time constant evaluation

runtime/vm/compiler_stats.h

Index: runtime/vm/compiler_stats.h
diff --git a/runtime/vm/compiler_stats.h b/runtime/vm/compiler_stats.h
index 5ed753703f311b300399d9bb109bdf9a70dfd862..98143a3fac6c429afeca81d6919be4b86bedd0f5 100644
--- a/runtime/vm/compiler_stats.h
+++ b/runtime/vm/compiler_stats.h
@@ -41,6 +41,7 @@ DECLARE_FLAG(bool, compiler_benchmark);
   V(num_tokens_consumed)                                                       \
   V(num_cached_consts)                                                         \
   V(num_const_cache_hits)                                                      \
+  V(num_execute_const)                                                         \
   V(num_classes_parsed)                                                        \
   V(num_class_tokens)                                                          \
   V(num_functions_parsed)                                                      \
@@ -85,6 +86,7 @@ class CompilerStats {
   int64_t num_tokens_consumed;
   int64_t num_cached_consts;
   int64_t num_const_cache_hits;
+  int64_t num_execute_const;
 
   int64_t num_classes_parsed;
   int64_t num_class_tokens;