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Backport of patch for PR64688 to gcc-4.9 branch

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, 27 Mar 2015 15:24:14 -0400
Subject: Backport of patch for PR64688 to gcc-4.9 branch
Authentication-results: sourceware.org; auth=none

  The following patch was ported to gcc-4.9 branch from the mainline.

  The patch was bootstrapped on x86/x86-64.

  Committed as rev. 221743.

2015-03-27  Vladimir Makarov  <vmakarov@redhat.com>

        Backport from mainline
        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.

2015-03-27  Vladimir Makarov  <vmakarov@redhat.com>

        Backport from mainline
        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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