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Subject: [Bug bootstrap/53555] [4.8 Regression] Bootstrap failure
Date: Sat, 02 Jun 2012 12:08:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53555

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2012-06-02 12:07:59 UTC ---
(In reply to comment #3)
> Hmm, it seems it's not quite correct to check ix86_tune, proper way is to use
> ix86_arch here. Following change fixes he bootstrap
> 
> diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> index c6c2c5e..a272411 100644
> --- a/gcc/config/i386/i386.c
> +++ b/gcc/config/i386/i386.c
> @@ -23881,7 +23881,7 @@ ix86_sched_reorder(FILE *dump, int sched_verbose, rtx
> *ready, int *pn_ready,
>    issue_rate = ix86_issue_rate();
> 
>    /* Do reodering for Atom only.  */
> -  if (ix86_tune != PROCESSOR_ATOM)
> +  if (ix86_arch != PROCESSOR_ATOM)
>      return issue_rate;
>    /* Nothing to do if ready list contains only 1 instruction.  */
>    if (n_ready <= 1)

This is the wrong fix. Bootstrap will fail if GCC is configured
with --with-arch=atom.