nontemporal_store: make sure that the intrinsic is truly just a hint

bjorn3 · Aug 5, 2024 · 80a7d5f · 80a7d5f
1 parent d35f63e
commit 80a7d5f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/intrinsics/mod.rs b/src/intrinsics/mod.rs
@@ -725,7 +725,8 @@ fn codegen_regular_intrinsic_call<'tcx>(
 
             // Cranelift treats stores as volatile by default
             // FIXME correctly handle unaligned_volatile_store
-            // FIXME actually do nontemporal stores if requested
+            // FIXME actually do nontemporal stores if requested (but do not just emit MOVNT on x86;
+            // see the LLVM backend for details)
             let dest = CPlace::for_ptr(Pointer::new(ptr), val.layout());
             dest.write_cvalue(fx, val);
         }