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[committed] Always force (const (plus (symbol) (const_int))) to const mem

From: John David Anglin <dave dot anglin at bell dot net>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 19 Feb 2015 19:39:06 -0500
Subject: [committed] Always force (const (plus (symbol) (const_int))) to const mem
Authentication-results: sourceware.org; auth=none

In spite of the relocation, this sequence is shorter than loading the constant and symbol_ref independently
when the constant doesn't fit in 14 bits.  So, I believe this is a win.

I've also added a REG_EQUAL note to improve optimization.

Tested on hppa-unknown-linux-gnu, hppa2.0w-hp-hpux11.11 and hppa64-hp-hpux11.11.  Committed to
trunk.

Dave
--
John David Anglin	dave.anglin@bell.net

Attachment: pa.c.d.txt
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