Add CodegenBackend enum

Author: Kobzol

collector/src/bin/collector.rs

@@ -6,6 +6,7 @@ use clap::{Arg, Parser};
 use collector::api::next_artifact::NextArtifact;
 use collector::codegen::{codegen_diff, CodegenType};
 use collector::compile::benchmark::category::Category;
+use collector::compile::benchmark::codegen_backend::CodegenBackend;
 use collector::compile::benchmark::profile::Profile;
 use collector::compile::benchmark::scenario::Scenario;
 use collector::compile::benchmark::{
@@ -335,6 +336,10 @@ struct CompileTimeOptions {
     )]
     scenarios: MultiEnumValue<Scenario>,
 
+    /// Measure the codegen backends in this comma-separated list
+    #[arg(long = "backends", value_parser = EnumArgParser::<CodegenBackend>::default(), default_value = "Llvm")]
+    codegen_backends: MultiEnumValue<CodegenBackend>,
+
     /// The path to the local rustdoc to measure
     #[arg(long)]
     rustdoc: Option<PathBuf>,

collector/src/compile/benchmark/codegen_backend.rs

@@ -0,0 +1,11 @@
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq, clap::ValueEnum, serde::Deserialize)]
+#[value(rename_all = "PascalCase")]
+pub enum CodegenBackend {
+    Llvm,
+}
+
+impl CodegenBackend {
+    pub fn all() -> Vec<CodegenBackend> {
+        vec![CodegenBackend::Llvm]
+    }
+}

collector/src/compile/benchmark/mod.rs

@@ -15,6 +15,7 @@ use std::path::{Path, PathBuf};
 use tempfile::TempDir;
 
 pub mod category;
+pub mod codegen_backend;
 pub(crate) mod patch;
 pub mod profile;
 pub mod scenario;