[interpreter] Ensure optimizations preserve source positions.

test/cctest/BUILD.gn

 # Copyright 2016 The V8 project authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Please keep this file in sync with cctest.gyp.
 
 import("../../gni/v8.gni")
 
 executable("cctest") {
   testonly = true
@@ skipping 54 matching lines @@
     "heap/test-array-buffer-tracker.cc",
     "heap/test-compaction.cc",
     "heap/test-heap.cc",
     "heap/test-incremental-marking.cc",
     "heap/test-lab.cc",
     "heap/test-mark-compact.cc",
     "heap/test-spaces.cc",
     "interpreter/bytecode-expectations-printer.cc",
     "interpreter/bytecode-expectations-printer.h",
     "interpreter/interpreter-tester.cc",
+    "interpreter/source-position-matcher.cc",
+    "interpreter/source-position-matcher.h",
     "interpreter/test-bytecode-generator.cc",
     "interpreter/test-interpreter-intrinsics.cc",
     "interpreter/test-interpreter.cc",
+    "interpreter/test-source-positions.cc",
     "libsampler/test-sampler.cc",
     "print-extension.cc",
     "profiler-extension.cc",
     "test-accessors.cc",
     "test-api-accessors.cc",
     "test-api-fast-accessor-builder.cc",
     "test-api-interceptors.cc",
     "test-api.cc",
     "test-api.h",
     "test-array-list.cc",
@@ skipping 270 matching lines @@
     "$target_gen_dir/resources.cc",
   ]
 
   args = [
     rebase_path("$target_gen_dir/resources.cc", root_build_dir),
     "TEST",
   ]
   args += rebase_path(sources, root_build_dir)
 }
 # TODO(machenbach): Migrate generate-bytecode-expectations.