On 06/16/2011 07:39 AM, Bernd Schmidt wrote:
> * regrename.c (scan_rtx_reg): Handle the case where we write to an
> open chain in a smaller mode without failing the entire block.
Ok.
r~
On 06/16/2011 04:39 PM, Bernd Schmidt wrote:
> + if (subset)
> + head->cannot_rename = 1;
I confused myself here by having too many trees, and tested & posted an
old version the patch. This (and another instance) needs to read (subset
&& !superset) since these aren't strict super-/su
Regrename tends to fall on its face if multiword registers are accessed
both in their full width and in subparts. However, there's one case
where it's relatively easy to improve the current situation - when
tracking a wide register, and it's written to in a narrower mode, we can
just close the chai
