From f368922cfa58d2ebc98b6153e62bcb65e27fcf67 Mon Sep 17 00:00:00 2001
From: Maybe Waffle <waffle.lapkin@gmail.com>
Date: Thu, 15 Feb 2024 00:23:56 +0000
Subject: Allow codegen backends to opt-out of parallel codegen

---
 compiler/rustc_codegen_ssa/src/traits/backend.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'compiler/rustc_codegen_ssa/src/traits')

diff --git a/compiler/rustc_codegen_ssa/src/traits/backend.rs b/compiler/rustc_codegen_ssa/src/traits/backend.rs
index 8e9907ed8bb..e8412a9b6eb 100644
--- a/compiler/rustc_codegen_ssa/src/traits/backend.rs
+++ b/compiler/rustc_codegen_ssa/src/traits/backend.rs
@@ -111,6 +111,13 @@ pub trait CodegenBackend {
         codegen_results: CodegenResults,
         outputs: &OutputFilenames,
     ) -> Result<(), ErrorGuaranteed>;
+
+    /// Returns `true` if this backend can be safely called from multiple threads.
+    ///
+    /// Defaults to `true`.
+    fn supports_parallel(&self) -> bool {
+        true
+    }
 }
 
 pub trait ExtraBackendMethods:
-- 
cgit 1.4.1-3-g733a5