On Fri, 28 Apr 2023, Tamar Christina wrote:

> Hi All,
> 
> genmatch currently outputs commented out line directives that have no effect
> but the compiler still has to parse only to discard.
> 
> They are however handy when debugging genmatch output.  As such this moves 
> them
> behind the -vv flag.
> 
> Bootstrapped Regtested on aarch64-none-linux-gnu and no issues.
> 
> Ok for master?
> 
> Thanks,
> Tamar
> 
> gcc/ChangeLog:
> 
>       PR bootstrap/84402
>       * genmatch.cc (output_line_directive): Only emit commented directive
>       when -vv.
>       (main): Initialize verbose.
> 
> --- inline copy of patch -- 
> diff --git a/gcc/genmatch.cc b/gcc/genmatch.cc
> index 
> 638606b2502f640e59527fc5a0b23fa3bedd0cee..6d62cdea2082d92e5ecc1102c80205115a4e3040
>  100644
> --- a/gcc/genmatch.cc
> +++ b/gcc/genmatch.cc
> @@ -209,7 +209,7 @@ output_line_directive (FILE *f, location_t location,
>        else
>       fprintf (f, "%s:%d", file, loc.line);
>      }
> -  else
> +  else if (verbose == 2)
>      /* Other gen programs really output line directives here, at least for
>         development it's right now more convenient to have line information
>         from the generated file.  Still keep the directives as comment for now
> @@ -5221,6 +5221,7 @@ main (int argc, char **argv)
>      return 1;
>  
>    bool gimple = true;
> +  verbose = 0;

That's redundant - globals are default zero-initialized.

OK with removing this line.

Thanks,
Richard.

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