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[PATCH, alpha]: Fix alpha bootstrap failure due to -Werror=shift-negative-value

From: Uros Bizjak <ubizjak at gmail dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Tue, 15 Sep 2015 19:53:23 +0200
Subject: [PATCH, alpha]: Fix alpha bootstrap failure due to -Werror=shift-negative-value
Authentication-results: sourceware.org; auth=none

2015-09-15  Uros Bizjak  <ubizjak@gmail.com>

    * config/alpha/alpha.c (alpha_expand_block_clear): Use
    HOST_WIDE_INT_M1U instead of ~(HOST_WIDE_INT)0 when shifting.

Bootstrapped and regression tested on alpha-linux-gnu.

Committed to mainline SVN.

Uros.

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