Flip matching

Author: divergentdave

src/shims/foreign_items.rs

@@ -433,15 +433,10 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
                 this.write_scalar(Scalar::from_f64(res), dest)?;
             }
 
+            "llvm.x86.sse2.pause" if this.tcx.sess.target.target.arch == "x86" || this.tcx.sess.target.target.arch == "x86_64" => {}
+
             // Target-specific shims
             _ => {
-                match this.tcx.sess.target.target.arch.as_str() {
-                    "x86" | "x86_64" => match link_name {
-                        "llvm.x86.sse2.pause" => return Ok(true),
-                        _ => {}
-                    }
-                    _ => {}
-                }
                 match this.tcx.sess.target.target.target_os.as_str() {
                     "linux" | "macos" => return posix::EvalContextExt::emulate_foreign_item_by_name(this, link_name, args, dest, ret),
                     "windows" => return windows::EvalContextExt::emulate_foreign_item_by_name(this, link_name, args, dest, ret),