Rollup merge of #116576 - eduardosm:const-eval-wasm-target-features, r=RalfJung

const-eval: allow calling functions with targat features disabled at compile time in WASM

This is not unsafe on WASM, see https://github.com/rust-lang/rust/pull/84988

r? `@RalfJung`

Fixes https://github.com/rust-lang/rust/issues/116516

compiler/rustc_const_eval/src/interpret/terminator.rs

@@ -890,11 +890,13 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
     }
 
     fn check_fn_target_features(&self, instance: ty::Instance<'tcx>) -> InterpResult<'tcx, ()> {
+        // Calling functions with `#[target_feature]` is not unsafe on WASM, see #84988
         let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
-        if attrs
-            .target_features
-            .iter()
-            .any(|feature| !self.tcx.sess.target_features.contains(feature))
+        if !self.tcx.sess.target.is_like_wasm
+            && attrs
+                .target_features
+                .iter()
+                .any(|feature| !self.tcx.sess.target_features.contains(feature))
         {
             throw_ub_custom!(
                 fluent::const_eval_unavailable_target_features_for_fn,