update to rustc-rayon with only main-loop work-stealing

Author: lqd

Cargo.lock

@@ -3297,8 +3297,7 @@ dependencies = [
 [[package]]
 name = "rustc-rayon"
 version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2cd9fb077db982d7ceb42a90471e5a69a990b58f71e06f0d8340bb2cf35eb751"
+source = "git+https://github.com/lqd/rustc-rayon?branch=pr-12#b6ce2659d4cb4d4524c45fd6dfa52c4e29043162"
 dependencies = [
  "either",
  "indexmap",
@@ -3308,13 +3307,13 @@ dependencies = [
 [[package]]
 name = "rustc-rayon-core"
 version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "67668daaf00e359c126f6dcb40d652d89b458a008c8afa727a42a2d20fca0b7f"
+source = "git+https://github.com/lqd/rustc-rayon?branch=pr-12#b6ce2659d4cb4d4524c45fd6dfa52c4e29043162"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-deque",
  "crossbeam-utils",
  "num_cpus",
+ "smallvec",
 ]
 
 [[package]]

Cargo.toml

@@ -94,3 +94,7 @@ codegen-units = 1
 # FIXME: LTO cannot be enabled for binaries in a workspace
 # <https://github.com/rust-lang/cargo/issues/9330>
 # lto = true
+
+[patch.crates-io]
+rustc-rayon = { git = "https://github.com/lqd/rustc-rayon", branch = "pr-12" }
+rustc-rayon-core = { git = "https://github.com/lqd/rustc-rayon", branch = "pr-12" }