[interpeter] Move to table based peephole optimizer.

BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 53 matching lines @@
 
   # Similar to vfp but on MIPS.
   v8_can_use_fpu_instructions = true
 
   # Similar to the ARM hard float ABI but on MIPS.
   v8_use_mips_abi_hardfloat = true
 }
 
 v8_random_seed = "314159265"
 v8_toolset_for_shell = "host"
+generated_peephole_source = "$target_gen_dir/bytecode-peephole-table.cc"
 
 ###############################################################################
 # Configurations
 #
 config("internal_config") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   include_dirs = [ "." ]
 
   if (is_component_build) {
@@ skipping 541 matching lines @@
       rebase_path("$root_out_dir/snapshot_blob.bin", root_build_dir),
     ]
   }
 
   if (v8_embed_script != "") {
     sources += [ v8_embed_script ]
     args += [ rebase_path(v8_embed_script, root_build_dir) ]
   }
 }
 
+action("run_mkpeephole") {
+  visibility = [ ":*" ]  # Only targets in this file can depend on this.
+
+  deps = [
+    ":mkpeephole($v8_snapshot_toolchain)",
+  ]
+
+  outputs = [
+    generated_peephole_source
+  ]
+
+  sources = []
+
+  script = "tools/run.py"
+
+  args = [
+    "./" + rebase_path(get_label_info(":mkpeephole($v8_snapshot_toolchain)",
+                                      "root_out_dir") + "/mkpeephole",
+                       root_build_dir),
+    rebase_path(generated_peephole_source, root_build_dir),
+  ]
+}
+
 action("v8_dump_build_config") {
   script = "tools/testrunner/utils/dump_build_config.py"
   outputs = [
     "$root_out_dir/v8_build_config.json",
   ]
   args = [
     rebase_path("$root_out_dir/v8_build_config.json", root_build_dir),
     "dcheck_always_on=$dcheck_always_on",
     "is_asan=$is_asan",
     "is_cfi=$is_cfi",
@@ skipping 634 matching lines @@
     "src/interpreter/bytecode-array-iterator.h",
     "src/interpreter/bytecode-array-writer.cc",
     "src/interpreter/bytecode-array-writer.h",
     "src/interpreter/bytecode-dead-code-optimizer.cc",
     "src/interpreter/bytecode-dead-code-optimizer.h",
     "src/interpreter/bytecode-generator.cc",
     "src/interpreter/bytecode-generator.h",
     "src/interpreter/bytecode-label.h",
     "src/interpreter/bytecode-peephole-optimizer.cc",
     "src/interpreter/bytecode-peephole-optimizer.h",
+    "src/interpreter/bytecode-peephole-table.h",
     "src/interpreter/bytecode-pipeline.cc",
     "src/interpreter/bytecode-pipeline.h",
     "src/interpreter/bytecode-register-allocator.cc",
     "src/interpreter/bytecode-register-allocator.h",
     "src/interpreter/bytecode-register-optimizer.cc",
     "src/interpreter/bytecode-register-optimizer.h",
     "src/interpreter/bytecode-traits.h",
     "src/interpreter/bytecodes.cc",
     "src/interpreter/bytecodes.h",
     "src/interpreter/constant-array-builder.cc",
@@ skipping 565 matching lines @@
       "src/s390/simulator-s390.h",
     ]
   }
 
   configs = [ ":internal_config" ]
 
   defines = []
   deps = [
     ":v8_libbase",
     ":v8_libsampler",
+    "//:run_mkpeephole",

[Michael Achenbach, 2016/07/11 09:11:42]

The // resolve to the project root. That means that when embedded into chromium
it'll be src and not src/v8. Like that it'd need a run_mkpeephole target in
chromium as well.

[oth, 2016/07/12 10:08:53]

Ack, yes, done.

   ]
 
+  sources += [ generated_peephole_source ]
+
   if (is_win) {
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     cflags = [ "/wd4267" ]
   }
 
   if (v8_enable_i18n_support) {
     deps += [ "//third_party/icu" ]
     if (is_win) {
       deps += [ "//third_party/icu:icudata" ]
     }
@@ skipping 203 matching lines @@
     deps = [
       ":v8_base",
       ":v8_libplatform",
       ":v8_nosnapshot",
       "//build/config/sanitizers:deps",
       "//build/win:default_exe_manifest",
     ]
   }
 }
 
+v8_executable("mkpeephole") {
+  # mkpeephole needs to be built for the build host so the peephole lookup
+  # table can built during build. The table depends on the properties of
+  # bytecodes that are described in bytecodes.{cc,h}.
+  visibility = [ ":*" ]  # Only targets in this file can depend on this.
+
+  sources = [
+    "src/interpreter/bytecode-peephole-optimizer.h",
+    "src/interpreter/bytecodes.cc",
+    "src/interpreter/bytecodes.h",
+    "src/interpreter/mkpeephole.cc",
+  ]
+
+  configs = [ ":internal_config" ]
+
+  deps = [
+    ":v8_libbase",
+  ]
+}
+
 ###############################################################################
 # Public targets
 #
 
 want_v8_shell =
     (current_toolchain == host_toolchain && v8_toolset_for_shell == "host") ||
     (current_toolchain == v8_snapshot_toolchain &&
      v8_toolset_for_shell == "host") ||
     (current_toolchain != host_toolchain && v8_toolset_for_shell == "target")
 
@@ skipping 286 matching lines @@
 
   deps = [
     ":fuzzer_support",
   ]
 
   configs = [ ":internal_config" ]
 }
 
 v8_fuzzer("wasm_asmjs_fuzzer") {
 }