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patch to fix PR 64688

From: Vladimir Makarov <vmakarov at redhat dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Fri, 30 Jan 2015 17:23:31 -0500
Subject: patch to fix PR 64688
Authentication-results: sourceware.org; auth=none

  The patch in the attachment solves

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64688

  The patch was bootstrapped and tested on x86-64 and ppc64.

  Committed as rev.220297.

2015-01-30  Vladimir Makarov  <vmakarov@redhat.com>

        PR target/64688
        * lra-constraints.c (original_subreg_reg_mode): New.
        (simplify_operand_subreg): Try to simplify subreg of const.  Use
        original_subreg_reg_mode for it.
        (swap_operands): Update original_subreg_reg_mode.
        (curr_insn_transform): Set up original_subreg_reg_mode.

2015-01-30  Vladimir Makarov  <vmakarov@redhat.com>

        PR target/64688
        * g++.dg/pr64688-2.C: New.

Attachment: pr64688.patch
Description: Text document

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