This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

[PATCH GCC][1/2]Feed bound computation to folder in loop split

From: Bin Cheng <Bin dot Cheng at arm dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: nd <nd at arm dot com>
Date: Wed, 14 Jun 2017 13:07:20 +0000
Subject: [PATCH GCC][1/2]Feed bound computation to folder in loop split
Authentication-results: sourceware.org; auth=none
Authentication-results: arm.com; dkim=none (message not signed) header.d=none;arm.com; dmarc=none action=none header.from=arm.com;
Nodisclaimer: True
Spamdiagnosticmetadata: NSPM
Spamdiagnosticoutput: 1:99

Hi,
Loop split forces intermediate computation to gimple operands all the time when
computing bound information.  This is not good since folding opportunities are
missed.  This patch fixes the issue by feeding all computation to folder and only
forcing to gimple operand at last.

Bootstrap and test on x86_64 and AArch64.  Is it OK?

Thanks,
bin
2017-06-12  Bin Cheng  <bin.cheng@arm.com>

	* tree-ssa-loop-split.c (compute_new_first_bound): Feed bound
	computation to folder, rather than force to gimple operands too
	early.

Attachment: 0001-feed-bound-computation-to-folder-20170601.txt
Description: 0001-feed-bound-computation-to-folder-20170601.txt

Follow-Ups:
- Re: [PATCH GCC][1/2]Feed bound computation to folder in loop split
  - From: Richard Biener

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]