From a79000c4b17a6678aa74e0b115bb44e1df57fbaa Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Fri, 8 Mar 2024 20:26:01 +0530
Subject: [PATCH 1/4] V8 builtins PGO

---
 .gitmodules | 3 +++
 depot_tools | 1 +
 2 files changed, 4 insertions(+)
 create mode 160000 depot_tools

diff --git a/.gitmodules b/.gitmodules
index 5ff41bf655..28c7f0230a 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -28,3 +28,6 @@
 [submodule "third_party/abseil-cpp"]
 	path = third_party/abseil-cpp
 	url = https://chromium.googlesource.com/chromium/src/third_party/abseil-cpp.git
+[submodule "depot_tools"]
+	path = depot_tools
+	url = https://github.com/denoland/depot_tools
diff --git a/depot_tools b/depot_tools
new file mode 160000
index 0000000000..726042b2c2
--- /dev/null
+++ b/depot_tools
@@ -0,0 +1 @@
+Subproject commit 726042b2c223ff037daef0678710044d19e4a947

From edf3b089bbb20115c0bc8526c536dd5e7f4a5b08 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Fri, 8 Mar 2024 20:26:08 +0530
Subject: [PATCH 2/4] V8 builtins PGO

---
 .gn      |  2 ++
 build.rs | 35 +++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/.gn b/.gn
index f1ce46c2cf..68858e0f8a 100644
--- a/.gn
+++ b/.gn
@@ -72,6 +72,8 @@ default_args = {
 
   # Enable V8 object print for debugging.
   # v8_enable_object_print = true
+  
+  v8_enable_builtins_optimization = true
 
   # Enable Deno-specific extra bindings
   deno_enable_extras = true
diff --git a/build.rs b/build.rs
index f890957918..2d57553229 100644
--- a/build.rs
+++ b/build.rs
@@ -114,6 +114,9 @@ fn build_v8() {
   if need_gn_ninja_download() {
     download_ninja_gn_binaries();
   }
+  if need_pgo_data_download() {
+    download_v8_pgo_data();
+  }
 
   // On windows, rustc cannot link with a V8 debug build.
   let mut gn_args = if is_debug() && !cfg!(target_os = "windows") {
@@ -310,6 +313,33 @@ fn download_ninja_gn_binaries() {
   env::set_var("NINJA", ninja);
 }
 
+fn download_v8_pgo_data() {
+  // Update $PATH to include depot_tools
+  //
+  // required for vpython3 to work.
+  env::set_var(
+    "PATH",
+    format!(
+      "{}:{}",
+      env::var("PATH").unwrap(),
+      std::env::current_dir()
+        .unwrap()
+        .join("depot_tools")
+        .to_str()
+        .unwrap()
+    ),
+  );
+  println!("Downloading PGO data");
+  assert!(Command::new(python())
+    .arg("./v8/tools/builtins-pgo/download_profiles.py")
+    .arg("download")
+    .arg("--depot-tools")
+    .arg("./depot_tools")
+    .status()
+    .unwrap()
+    .success());
+}
+
 fn static_lib_url() -> String {
   if let Ok(custom_archive) = env::var("RUSTY_V8_ARCHIVE") {
     return custom_archive;
@@ -533,6 +563,11 @@ fn need_gn_ninja_download() -> bool {
   !has_ninja || !has_gn
 }
 
+fn need_pgo_data_download() -> bool {
+  let pgo_data = Path::new("v8/tools/builtins-pgo/profiles/x64.profile");
+  !pgo_data.exists()
+}
+
 // Chromiums gn arg clang_base_path is currently compatible with:
 // * Apples clang and clang from homebrew's llvm@x packages
 // * the official binaries from releases.llvm.org

From 27f595e961cfbe2a0c88795f3183a7e2e17d3308 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Fri, 8 Mar 2024 21:29:44 +0530
Subject: [PATCH 3/4] x

---
 build.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/build.rs b/build.rs
index 2d57553229..e9503ad7fd 100644
--- a/build.rs
+++ b/build.rs
@@ -330,6 +330,7 @@ fn download_v8_pgo_data() {
     ),
   );
   println!("Downloading PGO data");
+  #[cfg(not(target_os = "windows"))]
   assert!(Command::new(python())
     .arg("./v8/tools/builtins-pgo/download_profiles.py")
     .arg("download")

From fad28986bcda6b0289a1edf5eb7d699f63865e74 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Sat, 9 Mar 2024 14:52:01 +0530
Subject: [PATCH 4/4] x

---
 Cargo.toml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Cargo.toml b/Cargo.toml
index 7dcadaec1d..6aac85d875 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -73,6 +73,7 @@ exclude = [
   "!v8/tools/run.py",
   "!v8/tools/snapshot/asm_to_inline_asm.py",
   "!v8/tools/testrunner/utils/dump_build_config.py",
+  "!v8/tools/builtins-pgo",
 ]
 
 [features]