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[PATCH] Improve performance for Haswell family.

From: Yuri Rumyantsev <ysrumyan at gmail dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, Uros Bizjak <ubizjak at gmail dot com>, Igor Zamyatin <izamyatin at gmail dot com>
Date: Fri, 14 Aug 2015 12:44:41 +0300
Subject: [PATCH] Improve performance for Haswell family.
Authentication-results: sourceware.org; auth=none

Hi All,

Here is patch which contains
(1) modifying of core2.md  to conform Haswell pipeline and adding of
missed instruction reservation for instructions with vector operands.
(2) increase reassociation width for float-point operations for
Haswell family and 64-bit target, this allows to get +10% speedup on
spec2006/410.bwaves for Skylake processor.

Bootstrap and regression testing did not show any new failures.
Is it OK for trunk?

ChangeLog:
2015-08-14  Yuri Rumyantsev  <ysrumyan@gmail.com>

* config/i386/core2.md: Confrom instruction reservation to Haswell
pipeline.
* config/i386/i386.c (ix86_reassociation_width): Increase reassociation
width for float-point operations.

Attachment: hsw.patch
Description: Binary data

Follow-Ups:
- Re: [PATCH] Improve performance for Haswell family.
  - From: Uros Bizjak

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