On Fri, Apr 22, 2016 at 01:22:51PM +, Wilco Dijkstra wrote:
> Improve modes_tieable by returning true in more cases: allow scalar access
> within vectors without requiring an extra move. Removing these moves helps
> the register allocator in deciding whether to use integer or FP registers on
>
ping
From: Wilco Dijkstra
Sent: 17 May 2016 17:08
To: James Greenhalgh
Cc: gcc-patches@gcc.gnu.org; nd
Subject: Re: [PATCH][AArch64] Improve aarch64_modes_tieable_p
James Greenhalgh wrote:
> It would be handy if you could raise something in bugzi
James Greenhalgh wrote:
> It would be handy if you could raise something in bugzilla for the
> register allocator deficiency.
The register allocation issues are well known and we have multiple
workarounds for this in place. When you allow modes to be tieable
the workarounds are not as effective.
On Fri, Apr 22, 2016 at 01:22:51PM +, Wilco Dijkstra wrote:
> Improve modes_tieable by returning true in more cases: allow scalar access
> within vectors without requiring an extra move. Removing these moves helps
> the register allocator in deciding whether to use integer or FP registers on
>
Improve modes_tieable by returning true in more cases: allow scalar access
within vectors without requiring an extra move. Removing these moves helps
the register allocator in deciding whether to use integer or FP registers on
operations that can be done on both. This saves about 100 instructions
