Re: [Qemu-devel] [PATCH 1/3] cputlb: Disable __always_inline__ without optimization

[Peter Maydell <peter.maydell@linaro.org>]

On Wed, 11 Sep 2019 at 02:43, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> This forced inlining can result in missing symbols,
> which makes a debugging build harder to follow.
>
> Reported-by: Peter Maydell <peter.maydell@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  accel/tcg/cputlb.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
> index abae79650c..909f01ebcc 100644
> --- a/accel/tcg/cputlb.c
> +++ b/accel/tcg/cputlb.c
> @@ -1269,6 +1269,18 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
>      cpu_loop_exit_atomic(env_cpu(env), retaddr);
>  }
>
> +/*
> + * In order for the expected constant folding to happen,
> + * we require that some functions be inlined.
> + * However, this inlining can make debugging harder for a
> + * non-optimizing build.
> + */
> +#ifdef __OPTIMIZE__
> +#define ALWAYS_INLINE  __attribute__((always_inline))
> +#else
> +#define ALWAYS_INLINE
> +#endif
> +

Maybe this should go in compiler.h ?

>  /*
>   * Load Helpers
>   *
> @@ -1281,7 +1293,7 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
>  typedef uint64_t FullLoadHelper(CPUArchState *env, target_ulong addr,
>                                  TCGMemOpIdx oi, uintptr_t retaddr);
>
> -static inline uint64_t __attribute__((always_inline))
> +static inline uint64_t ALWAYS_INLINE
>  load_helper(CPUArchState *env, target_ulong addr, TCGMemOpIdx oi,
>              uintptr_t retaddr, MemOp op, bool code_read,
>              FullLoadHelper *full_load)
> @@ -1530,7 +1542,7 @@ tcg_target_ulong helper_be_ldsl_mmu(CPUArchState *env, target_ulong addr,
>   * Store Helpers
>   */
>
> -static inline void __attribute__((always_inline))
> +static inline void ALWAYS_INLINE
>  store_helper(CPUArchState *env, target_ulong addr, uint64_t val,
>               TCGMemOpIdx oi, uintptr_t retaddr, MemOp op)
>  {
> --
> 2.17.1

Either way

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM