Implement ptr_mask intrinsic in cg gcc

compiler/rustc_codegen_gcc/src/intrinsic/mod.rs

@@ -309,6 +309,8 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
                     return;
                 }
 
+                sym::ptr_mask => self.and(args[0].immediate(), args[1].immediate()),
+
                 _ if name_str.starts_with("simd_") => {
                     match generic_simd_intrinsic(self, name, callee_ty, args, ret_ty, llret_ty, span) {
                         Ok(llval) => llval,