[interpeter] Move to table based peephole optimizer.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index a11b1467e286fdc799183bca0d3c358bc29fcb31..0998d62e25a2bfaef9e8e42c20e12e934f24d86f 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -71,6 +71,7 @@ declare_args() {
 
 v8_random_seed = "314159265"
 v8_toolset_for_shell = "host"
+generated_peephole_source = "$target_gen_dir/bytecode-peephole-table.cc"
 
 ###############################################################################
 # Configurations
@@ -632,6 +633,29 @@ action("run_mksnapshot") {
   }
 }
 
+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 = [
@@ -1286,6 +1310,7 @@ v8_source_set("v8_base") {
     "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",
@@ -1871,8 +1896,11 @@ v8_source_set("v8_base") {
   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" ]
@@ -2096,6 +2124,26 @@ if (current_toolchain == v8_snapshot_toolchain) {
   }
 }
 
+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
 #