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Tue, 26 Oct 2021 09:34:27 -0700 (PDT) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 5C3691FF96; Tue, 26 Oct 2021 17:34:26 +0100 (BST) References: <20211021210539.825582-1-richard.henderson@linaro.org> <20211021210539.825582-45-richard.henderson@linaro.org> User-agent: mu4e 1.7.4; emacs 28.0.60 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Richard Henderson Subject: Re: [PATCH v3 44/48] tcg/optimize: Optimize sign extensions Date: Tue, 26 Oct 2021 17:34:16 +0100 In-reply-to: <20211021210539.825582-45-richard.henderson@linaro.org> Message-ID: <87k0hzzqwd.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=2a00:1450:4864:20::230; envelope-from=alex.bennee@linaro.org; helo=mail-lj1-x230.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: luis.pires@eldorado.org.br, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Richard Henderson writes: > Certain targets, like riscv, produce signed 32-bit results. > This can lead to lots of redundant extensions as values are > manipulated. > > Begin by tracking only the obvious sign-extensions, and > converting them to simple copies when possible. > > Signed-off-by: Richard Henderson Reviewed-by: Alex Benn=C3=A9e --=20 Alex Benn=C3=A9e