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[173.197.107.21]) by smtp.gmail.com with ESMTPSA id i7sm3771687pfc.50.2021.01.13.18.17.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jan 2021 18:17:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ukQ7RjPHGqGDNjwPl9c9BeoLOp2dRJAKhrKe0DnYWUg=; b=gtc4joOehf/F6/cXYanWxoNiRQghhJuG5QFJHE9gXZopLyzGOtSweO5P9Fv7WuE28H sbXi4/K+CShToreJGXxlaPBqSrPa8CdRo0yFB9dxisLaSOGXc7w/eX/CdcQ45R9DH7yX 0mEIgSAFZfFWM99xT28AOPaQL0+l7T80jMPJAqOGN9KNVy5V1lj6nN98kxi9xZMS6QEd DJfYj1b3XO5hjfNTOgAdjZGwwpSbAj9CHBuBKDLhqplRMC1JpCDuun5LvEb2ZJ6at/as Wlyc7HE9PIUH8ujS/GgNyzOl0gzLEpOPFNc/bPGunSt1kHqjMmz9pVI/jsoErjjWIuRH /IDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ukQ7RjPHGqGDNjwPl9c9BeoLOp2dRJAKhrKe0DnYWUg=; b=pX8RBzQZqmmsX58CyMucVXjVTfiQfZKozwLL71ByN+n0fsVYMYIsaDSCLBut0BapKV KOFKtZ/doSXDcjCthBAJ0oHeQcQWgIQ4P/Shgr8qKKgb3KaECiPetp6vdb7j33e1uCwl 4SlCWcRWzbCsj3F0LrZ6QIt1xeTZIHnzHftsOSR0uyJkPFssQUHepTfNDEkN77KO+fpi lG4Q9gU/q00T32Dwg5VCuhtQX+osglRN6tmh+VpoRN33G/a249un+C3WlGmJmi0guAPl z4b6bpmRRgQxxFBKSTm61+/KRQVzgGYnEYu7zCsNpJTnynzbcmG1zap3jj2CE3AaF1+m QmYw== X-Gm-Message-State: AOAM530Q0HtXX+1W0ryR4OgROMyKQUHdw9Yl468Er7px6OHkDC7ob5r+ fM5nj+p+R/TncLoZ7JsdLSK+NVCobdNGHg== X-Google-Smtp-Source: ABdhPJwnlCGGBw1Wf+8HzJVoGgsz6ho870UL+UnsJ+CUiu1aImgW3XoEMtthF22Pxe3eRl6FdQwASw== X-Received: by 2002:a17:902:b616:b029:da:fcfd:7568 with SMTP id b22-20020a170902b616b02900dafcfd7568mr5398496pls.35.1610590633409; Wed, 13 Jan 2021 18:17:13 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL 09/24] tcg/optimize: Improve find_better_copy Date: Wed, 13 Jan 2021 16:16:39 -1000 Message-Id: <20210114021654.647242-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210114021654.647242-1-richard.henderson@linaro.org> References: <20210114021654.647242-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::102e; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x102e.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: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" Prefer TEMP_CONST over anything else. Signed-off-by: Richard Henderson --- tcg/optimize.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 16b0aa7229..e42f9c89a8 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -122,31 +122,28 @@ static void init_arg_info(TempOptInfo *infos, =20 static TCGTemp *find_better_copy(TCGContext *s, TCGTemp *ts) { - TCGTemp *i; + TCGTemp *i, *g, *l; =20 - /* If this is already a global, we can't do better. */ - if (ts->kind >=3D TEMP_GLOBAL) { + /* If this is already readonly, we can't do better. */ + if (temp_readonly(ts)) { return ts; } =20 - /* Search for a global first. */ + g =3D l =3D NULL; for (i =3D ts_info(ts)->next_copy; i !=3D ts; i =3D ts_info(i)->next_c= opy) { - if (i->kind >=3D TEMP_GLOBAL) { + if (temp_readonly(i)) { return i; - } - } - - /* If it is a temp, search for a temp local. */ - if (ts->kind =3D=3D TEMP_NORMAL) { - for (i =3D ts_info(ts)->next_copy; i !=3D ts; i =3D ts_info(i)->ne= xt_copy) { - if (i->kind >=3D TEMP_LOCAL) { - return i; + } else if (i->kind > ts->kind) { + if (i->kind =3D=3D TEMP_GLOBAL) { + g =3D i; + } else if (i->kind =3D=3D TEMP_LOCAL) { + l =3D i; } } } =20 - /* Failure to find a better representation, return the same temp. */ - return ts; + /* If we didn't find a better representation, return the same temp. */ + return g ? g : l ? l : ts; } =20 static bool ts_are_copies(TCGTemp *ts1, TCGTemp *ts2) --=20 2.25.1