Optimize eq

Author: compiler-errors

Cargo.lock

@@ -1014,8 +1014,7 @@ dependencies = [
 [[package]]
 name = "derivative"
 version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcc3dd5e9e9c0b295d6e1e4d811fb6f157d5ffd784b8d202fc62eac8035a770b"
+source = "git+https://github.com/compiler-errors/rust-derivative.git?branch=eq#2be4507055fee1bb6e13b1d00dd6807afca53ecd"
 dependencies = [
  "proc-macro2",
  "quote",

compiler/rustc_type_ir/Cargo.toml

@@ -6,10 +6,10 @@ edition = "2021"
 [dependencies]
 # tidy-alphabetical-start
 bitflags = "1.2.1"
+derivative = { git = "https://github.com/compiler-errors/rust-derivative.git", branch = "eq" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_index = { path = "../rustc_index" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
-derivative = "2.2.0"
 # tidy-alphabetical-end

src/tools/tidy/src/extdeps.rs

@@ -4,7 +4,10 @@ use std::fs;
 use std::path::Path;
 
 /// List of allowed sources for packages.
-const ALLOWED_SOURCES: &[&str] = &["\"registry+https://github.com/rust-lang/crates.io-index\""];
+const ALLOWED_SOURCES: &[&str] = &[
+    "\"registry+https://github.com/rust-lang/crates.io-index\"",
+    "\"git+https://github.com/compiler-errors/rust-derivative.git?branch=eq#2be4507055fee1bb6e13b1d00dd6807afca53ecd\"",
+];
 
 /// Checks for external package sources. `root` is the path to the directory that contains the
 /// workspace `Cargo.toml`.