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[committed] Change "Q" and "T" constraints to memory constraints

From: John David Anglin <dave dot anglin at bell dot net>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Fri, 13 Feb 2015 08:22:26 -0500
Subject: [committed] Change "Q" and "T" constraints to memory constraints
Authentication-results: sourceware.org; auth=none

The recent change to use the "Q" constraint instead of the "m" constraint in several patterns caused
a regression that broke the build of the Debian webkitgtk package.  Memory addresses (spills) with out
of range offsets were not being reloaded in functions with large frames.  This change fixes that problem.

A side effect of the change was reload now sometimes tries to push a constant symbolic reference
to data into readonly memory.  The 32-bit HP linker doesn't like these references.  Thus, the change
to pa_cannot_force_const_mem.

Tested on hppa2.0w-hp-hpux11.11, hppa64-hp-hpux11.11 and hppa-unknown-linu-gnu.  Committed
to trunk and 4.9 branch.

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

Attachment: constraints.md.d.txt
Description: Text document

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  - From: Richard Henderson

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