Andrew Carlotti <andrew.carlo...@arm.com> writes:
> I forgot to include this in the earlier patch; is this ok for master (once the
> pass is merged, of course)?
>
> gcc/ChangeLog:
>
> * doc/passes.texi: Document hardreg PRE pass.
>
>
> diff --git a/gcc/doc/passes.texi b/gcc/doc/passes.texi
> index
> 639f6b325c8be47bffd64269340c4dd8ea0f321c..5c2a174a7495404de48002f54902cce846e62b53
> 100644
> --- a/gcc/doc/passes.texi
> +++ b/gcc/doc/passes.texi
> @@ -959,6 +959,11 @@ global constant and copy propagation.
> The source file for this pass is @file{gcse.cc}, and the LCM routines
> are in @file{lcm.cc}.
>
> +A third version of this pass is run on some targets to optimise assignments
> to
> +specific hard registers. This can be used in cases where a register has a
> +single purpose, such as specifying a mode as an extra input for specific
> +instructions (when these modes cannot be handled in the mode switching pass).
LGTM, but how about adding ", @pxref{Mode switching optimization}" after
"mode switching pass"? (Untested.)
OK with that change, or without if it doesn't work.
Thanks,
Richard
> +
> @item Loop optimization
>
> This pass performs several loop related optimizations.
