gcc/testsuite/gcc.dg/noncompile/invalid_asm.c

   1 /* { dg-options "-ffat-lto-objects" } */
   2 asm_invalid_register_name()
   3 {
   4   asm("":::"this_is_an_invalid_register_name"); /* { dg-error "unknown register" } */
   5 }