From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xi Wang <xi.wang@gmail.com>
Subject: Re: [PATCH 1/2] sparse, llvm: group PHI nodes at the top of each
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Date: Wed, 17 Oct 2012 02:53:48 -0400
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To: Pekka Enberg <penberg@kernel.org>
Cc: =?UTF-8?B?Sm9uYXRoYW4gTmV1c2Now6RmZXI=?= <j.neuschaefer@gmx.net>, Jeff Garzik <jgarzik@pobox.com>, linux-sparse@vger.kernel.org, Christopher Li <sparse@chrisli.org>, Jeff Garzik <jgarzik@redhat.com>, Linus Torvalds <torvalds@linux-foundation.org>

On 10/17/12 2:48 AM, Pekka Enberg wrote:
> Is LLVM able to optimize away the allocas and use registers instead in
> the emitted code?

Yes.  See the last part of my previous email, no load/store/alloca after
LLVM's -mem2reg pass.

- xi