From cd848c9f3eebcb4a0940e1370d3e6ba9b0fe4bca Mon Sep 17 00:00:00 2001
From: clubby789 <jamie@hill-daniel.co.uk>
Date: Mon, 9 Dec 2024 19:00:43 +0000
Subject: Implement `optimize(none)` attribute

---
 compiler/rustc_codegen_ssa/src/base.rs          | 5 +----
 compiler/rustc_codegen_ssa/src/codegen_attrs.rs | 2 ++
 2 files changed, 3 insertions(+), 4 deletions(-)

(limited to 'compiler/rustc_codegen_ssa/src')

diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs
index 83724af604d..6099dec2bb2 100644
--- a/compiler/rustc_codegen_ssa/src/base.rs
+++ b/compiler/rustc_codegen_ssa/src/base.rs
@@ -1053,10 +1053,7 @@ pub(crate) fn provide(providers: &mut Providers) {
 
         let any_for_speed = defids.items().any(|id| {
             let CodegenFnAttrs { optimize, .. } = tcx.codegen_fn_attrs(*id);
-            match optimize {
-                attr::OptimizeAttr::None | attr::OptimizeAttr::Size => false,
-                attr::OptimizeAttr::Speed => true,
-            }
+            matches!(optimize, attr::OptimizeAttr::Speed)
         });
 
         if any_for_speed {
diff --git a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
index 1daa17fbaf3..6f40ebb9b6e 100644
--- a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
+++ b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
@@ -592,6 +592,8 @@ fn codegen_fn_attrs(tcx: TyCtxt<'_>, did: LocalDefId) -> CodegenFnAttrs {
                 OptimizeAttr::Size
             } else if list_contains_name(items, sym::speed) {
                 OptimizeAttr::Speed
+            } else if list_contains_name(items, sym::none) {
+                OptimizeAttr::DoNotOptimize
             } else {
                 err(items[0].span(), "invalid argument");
                 OptimizeAttr::None
-- 
cgit 1.4.1-3-g733a5