/* PR inline-asm/8788 *//* { dg-do compile } *//* { dg-options "-O2" } */typedef struct {    long x[6];} myjmp_buf;typedef struct {    myjmp_buf regs;} my_stack;void switch_to_stack (my_stack *stack){    asm (  /* { dg-error "impossible constraint" } *//* { dg-warning "asm operand 1" "asm operand 1" { target *-*-* } 14 } */        "\n"        : "+r" (stack->regs)    );}