Merge commit '598f090956' into sync_cg_clif-2023-01-24

compiler/rustc_codegen_cranelift/build_system/bench.rs

@@ -0,0 +1,97 @@
+use std::env;
+use std::fs;
+use std::path::Path;
+
+use super::path::{Dirs, RelPath};
+use super::prepare::GitRepo;
+use super::rustc_info::get_file_name;
+use super::utils::{hyperfine_command, is_ci, spawn_and_wait, CargoProject, Compiler};
+
+pub(crate) static SIMPLE_RAYTRACER_REPO: GitRepo = GitRepo::github(
+    "ebobby",
+    "simple-raytracer",
+    "804a7a21b9e673a482797aa289a18ed480e4d813",
+    "<none>",
+);
+
+// Use a separate target dir for the initial LLVM build to reduce unnecessary recompiles
+pub(crate) static SIMPLE_RAYTRACER_LLVM: CargoProject =
+    CargoProject::new(&SIMPLE_RAYTRACER_REPO.source_dir(), "simple_raytracer_llvm");
+
+pub(crate) static SIMPLE_RAYTRACER: CargoProject =
+    CargoProject::new(&SIMPLE_RAYTRACER_REPO.source_dir(), "simple_raytracer");
+
+pub(crate) fn benchmark(dirs: &Dirs, bootstrap_host_compiler: &Compiler) {
+    benchmark_simple_raytracer(dirs, bootstrap_host_compiler);
+}
+
+fn benchmark_simple_raytracer(dirs: &Dirs, bootstrap_host_compiler: &Compiler) {
+    if std::process::Command::new("hyperfine").output().is_err() {
+        eprintln!("Hyperfine not installed");
+        eprintln!("Hint: Try `cargo install hyperfine` to install hyperfine");
+        std::process::exit(1);
+    }
+
+    eprintln!("[LLVM BUILD] simple-raytracer");
+    let build_cmd = SIMPLE_RAYTRACER_LLVM.build(bootstrap_host_compiler, dirs);
+    spawn_and_wait(build_cmd);
+    fs::copy(
+        SIMPLE_RAYTRACER_LLVM
+            .target_dir(dirs)
+            .join(&bootstrap_host_compiler.triple)
+            .join("debug")
+            .join(get_file_name("main", "bin")),
+        RelPath::BUILD.to_path(dirs).join(get_file_name("raytracer_cg_llvm", "bin")),
+    )
+    .unwrap();
+
+    let run_runs = env::var("RUN_RUNS")
+        .unwrap_or(if is_ci() { "2" } else { "10" }.to_string())
+        .parse()
+        .unwrap();
+
+    eprintln!("[BENCH COMPILE] ebobby/simple-raytracer");
+    let cargo_clif =
+        RelPath::DIST.to_path(dirs).join(get_file_name("cargo_clif", "bin").replace('_', "-"));
+    let manifest_path = SIMPLE_RAYTRACER.manifest_path(dirs);
+    let target_dir = SIMPLE_RAYTRACER.target_dir(dirs);
+
+    let clean_cmd = format!(
+        "cargo clean --manifest-path {manifest_path} --target-dir {target_dir}",
+        manifest_path = manifest_path.display(),
+        target_dir = target_dir.display(),
+    );
+    let llvm_build_cmd = format!(
+        "cargo build --manifest-path {manifest_path} --target-dir {target_dir}",
+        manifest_path = manifest_path.display(),
+        target_dir = target_dir.display(),
+    );
+    let clif_build_cmd = format!(
+        "{cargo_clif} build --manifest-path {manifest_path} --target-dir {target_dir}",
+        cargo_clif = cargo_clif.display(),
+        manifest_path = manifest_path.display(),
+        target_dir = target_dir.display(),
+    );
+
+    let bench_compile =
+        hyperfine_command(1, run_runs, Some(&clean_cmd), &llvm_build_cmd, &clif_build_cmd);
+
+    spawn_and_wait(bench_compile);
+
+    eprintln!("[BENCH RUN] ebobby/simple-raytracer");
+    fs::copy(
+        target_dir.join("debug").join(get_file_name("main", "bin")),
+        RelPath::BUILD.to_path(dirs).join(get_file_name("raytracer_cg_clif", "bin")),
+    )
+    .unwrap();
+
+    let mut bench_run = hyperfine_command(
+        0,
+        run_runs,
+        None,
+        Path::new(".").join(get_file_name("raytracer_cg_llvm", "bin")).to_str().unwrap(),
+        Path::new(".").join(get_file_name("raytracer_cg_clif", "bin")).to_str().unwrap(),
+    );
+    bench_run.current_dir(RelPath::BUILD.to_path(dirs));
+    spawn_and_wait(bench_run);
+}