use --mllvm=-mcpu=mvp

Author: StackOverflowExcept1on

compiler/rustc_target/src/spec/targets/wasm32v1_none.rs

@@ -29,11 +29,10 @@ pub(crate) fn target() -> Target {
             // For now this target just never has an entry symbol no matter the output
             // type, so unconditionally pass this.
             "--no-entry",
-            // It is also necessary to explicitly set the features since some changes
+            // It is also necessary to explicitly set CPU since some changes
             // were made to WebAssembly starting with LLVM 20.1.0:
             // https://releases.llvm.org/20.1.0/docs/ReleaseNotes.html#changes-to-the-webassembly-backend
-            "--features=+mutable-globals",
-            "--no-check-features",
+            "--mllvm=-mcpu=mvp",
         ],
     );
     options.add_pre_link_args(
@@ -42,7 +41,7 @@ pub(crate) fn target() -> Target {
             // Make sure clang uses LLD as its linker and is configured appropriately
             // otherwise
             "--target=wasm32-unknown-unknown",
-            "-Wl,--no-entry,--features=+mutable-globals,--no-check-features",
+            "-Wl,--no-entry,--mllvm=-mcpu=mvp",
         ],
     );