Reapply "Eliminate dependencies on assemblers and code stubs in precompiled runtime."

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 747f9328cdf2415556724dfc8766ece9ff78bead..0e80977c90fc5ac418018ad2140ccc86222f325a 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -107,6 +107,44 @@ DEFINE_FLAG(bool,
 
 DECLARE_FLAG(bool, huge_method_cutoff_in_code_size);
 DECLARE_FLAG(bool, trace_failed_optimization_attempts);
+DECLARE_FLAG(bool, unbox_numeric_fields);
+
+static void PrecompilationModeHandler(bool value) {
+  if (value) {
+#if defined(TARGET_ARCH_IA32)
+    FATAL("Precompilation not supported on IA32");
+#endif
+
+    FLAG_background_compilation = false;
+    FLAG_enable_mirrors = false;
+    FLAG_fields_may_be_reset = true;
+    FLAG_interpret_irregexp = true;
+    FLAG_lazy_dispatchers = false;
+    FLAG_link_natives_lazily = true;
+    FLAG_optimization_counter_threshold = -1;
+    FLAG_polymorphic_with_deopt = false;
+    FLAG_precompiled_mode = true;
+    FLAG_reorder_basic_blocks = false;
+    FLAG_use_field_guards = false;
+    FLAG_use_cha_deopt = false;
+
+#if !defined(PRODUCT) && !defined(DART_PRECOMPILED_RUNTIME)
+    // Set flags affecting runtime accordingly for dart_bootstrap.
+    // These flags are constants with PRODUCT and DART_PRECOMPILED_RUNTIME.
+    FLAG_collect_code = false;
+    FLAG_deoptimize_alot = false;  // Used in some tests.
+    FLAG_deoptimize_every = 0;     // Used in some tests.
+    FLAG_load_deferred_eagerly = true;
+    FLAG_print_stop_message = false;
+    FLAG_unbox_numeric_fields = false;
+    FLAG_use_osr = false;
+#endif
+  }
+}
+
+DEFINE_FLAG_HANDLER(PrecompilationModeHandler,
+                    precompilation,
+                    "Precompilation mode");
 
 #ifndef DART_PRECOMPILED_RUNTIME