From ab8101d0196b6d1d0161b47fadff22bc82195fe5 Mon Sep 17 00:00:00 2001
From: SparrowLii <liyuan179@huawei.com>
Date: Tue, 31 Oct 2023 16:36:40 +0800
Subject: [PATCH] enable parallel rustc in nightly builds

---
 src/bootstrap/src/core/config/config.rs | 7 +++++--
 src/ci/run.sh                           | 4 ++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index f56e46010f371..95d34aaf285d5 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -1072,6 +1072,7 @@ impl Config {
         config.bindir = "bin".into();
         config.dist_include_mingw_linker = true;
         config.dist_compression_profile = "fast".into();
+        config.rustc_parallel = true;
 
         config.stdout_is_tty = std::io::stdout().is_terminal();
         config.stderr_is_tty = std::io::stderr().is_terminal();
@@ -1111,7 +1112,7 @@ impl Config {
 
     fn parse_inner(args: &[String], get_toml: impl Fn(&Path) -> TomlConfig) -> Config {
         let mut flags = Flags::parse(&args);
-        let mut config = Config::default_opts();
+        let mut config: Config = Config::default_opts();
 
         // Set flags.
         config.paths = std::mem::take(&mut flags.paths);
@@ -1429,7 +1430,9 @@ impl Config {
             set(&mut config.use_lld, rust.use_lld);
             set(&mut config.lld_enabled, rust.lld);
             set(&mut config.llvm_tools_enabled, rust.llvm_tools);
-            config.rustc_parallel = rust.parallel_compiler.unwrap_or(false);
+            config.rustc_parallel = rust
+                .parallel_compiler
+                .unwrap_or(config.channel == "dev" || config.channel == "nightly");
             config.rustc_default_linker = rust.default_linker;
             config.musl_root = rust.musl_root.map(PathBuf::from);
             config.save_toolstates = rust.save_toolstates.map(PathBuf::from);
diff --git a/src/ci/run.sh b/src/ci/run.sh
index 9a63bb5c91c9b..f67bfb7920ee3 100755
--- a/src/ci/run.sh
+++ b/src/ci/run.sh
@@ -98,8 +98,8 @@ if [ "$DEPLOY$DEPLOY_ALT" = "1" ]; then
   if [ "$NO_LLVM_ASSERTIONS" = "1" ]; then
     RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --disable-llvm-assertions"
   elif [ "$DEPLOY_ALT" != "" ]; then
-    if [ "$NO_PARALLEL_COMPILER" = "" ]; then
-      RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.parallel-compiler"
+    if [ "$ALT_PARALLEL_COMPILER" = "" ]; then
+      RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.parallel-compiler=false"
     fi
     RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --enable-llvm-assertions"
     RUST_CONFIGURE_ARGS="$RUST_CONFIGURE_ARGS --set rust.verify-llvm-ir"