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[174.21.75.75]) by smtp.gmail.com with ESMTPSA id i11sm4120257pgp.18.2021.10.28.21.33.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Oct 2021 21:33:49 -0700 (PDT) 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=wwLC3SIjtchiXP//8YOMxzaxe2iWQlOarPylhYlRTg4=; b=h8L84g00QwjgjZdoVee38DFClmBdaUrUTvnIApDQDjAJ3yTCGGAtXfBqceV+OU0w7v rdzHKJDBvj72k+hYTC7EJvddCqH7vBzc0ZR0xJ14tWkFU8MliyrCZt9VyQFXlXNcdT+a IcQIlLMLg9p0+44HM1tp3lloylUnv3bzq+3oNdUBnzNqAQUq2/G9MEseQUT10p9lYxIj whuHofraFDd6/0v/Nm+iBtrfVYON618anJPXus6g2zxnSlnARaPnyNTl1zLf2rdZkGp+ QTk4Oa1U3zYHfXFp5fbRVSqie9T2sbZmNVTHh+GDGxVqb7qwvl70B7UjzGjeQ8qECdcp UDqA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=wwLC3SIjtchiXP//8YOMxzaxe2iWQlOarPylhYlRTg4=; b=QaHLgG9SB2/Tinm5r73vPaFMbtFjQ0eG88MEckQ3z7/Aw55zEQxFtpvJqVzRQpiVXk q6VE8y3AEV/HAEQv5O4+ZhDRYXOyd0y0XKPnT/+9eq92CjrdjzNuYZ4IYEtca57W3eJn 55SXm2V+h2aaN38IYIW9Wz4KJpMvyteIU3XFmWKGWUfBMkVjn319nf3OFHoQJmeZYB/X O3lSsilMTaFogYzOiOM6GS5Ri06bLOrIQs/XFfV4Z+MujB9ZFMwgHtzocjth+oFjrZ9r CnXD+GHr4dbA6NN2Hwucda7M93IUKdWDyIpt7seX8WUV9Yj22NNJtIBMr4xGTinhd+wH ntJw== X-Gm-Message-State: AOAM530AzgYqqL9jKYEGv8w+P4mTyZBLFuEom6Eiebf+Io20nCCodVX+ pTF6i3ywFR8xxrNZmtTNU5s/SIQjp0fKmA== X-Google-Smtp-Source: ABdhPJw1JHvEmpXSwsXOUeHUa3fgm+Bn6o7MMlyMgRHF7zXClvjuzAjHPddx1mUqmI8GFs4M2PegbA== X-Received: by 2002:a17:902:ec8d:b0:140:2a5e:d224 with SMTP id x13-20020a170902ec8d00b001402a5ed224mr7730638plg.27.1635482029562; Thu, 28 Oct 2021 21:33:49 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL v2 22/60] tcg/optimize: Split out fold_brcond2 Date: Thu, 28 Oct 2021 21:32:51 -0700 Message-Id: <20211029043329.1518029-23-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211029043329.1518029-1-richard.henderson@linaro.org> References: <20211029043329.1518029-1-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::62c; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62c.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 Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1635483261826100001 Content-Type: text/plain; charset="utf-8" Reduce some code duplication by folding the NE and EQ cases. Reviewed-by: Luis Pires Signed-off-by: Richard Henderson --- tcg/optimize.c | 159 +++++++++++++++++++++++++------------------------ 1 file changed, 81 insertions(+), 78 deletions(-) diff --git a/tcg/optimize.c b/tcg/optimize.c index 80e43deb8e..c9db14f1d0 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -714,6 +714,84 @@ static bool fold_andc(OptContext *ctx, TCGOp *op) return fold_const2(ctx, op); } =20 +static bool fold_brcond2(OptContext *ctx, TCGOp *op) +{ + TCGCond cond =3D op->args[4]; + int i =3D do_constant_folding_cond2(&op->args[0], &op->args[2], cond); + TCGArg label =3D op->args[5]; + int inv =3D 0; + + if (i >=3D 0) { + goto do_brcond_const; + } + + switch (cond) { + case TCG_COND_LT: + case TCG_COND_GE: + /* + * Simplify LT/GE comparisons vs zero to a single compare + * vs the high word of the input. + */ + if (arg_is_const(op->args[2]) && arg_info(op->args[2])->val =3D=3D= 0 && + arg_is_const(op->args[3]) && arg_info(op->args[3])->val =3D=3D= 0) { + goto do_brcond_high; + } + break; + + case TCG_COND_NE: + inv =3D 1; + QEMU_FALLTHROUGH; + case TCG_COND_EQ: + /* + * Simplify EQ/NE comparisons where one of the pairs + * can be simplified. + */ + i =3D do_constant_folding_cond(INDEX_op_brcond_i32, op->args[0], + op->args[2], cond); + switch (i ^ inv) { + case 0: + goto do_brcond_const; + case 1: + goto do_brcond_high; + } + + i =3D do_constant_folding_cond(INDEX_op_brcond_i32, op->args[1], + op->args[3], cond); + switch (i ^ inv) { + case 0: + goto do_brcond_const; + case 1: + op->opc =3D INDEX_op_brcond_i32; + op->args[1] =3D op->args[2]; + op->args[2] =3D cond; + op->args[3] =3D label; + break; + } + break; + + default: + break; + + do_brcond_high: + op->opc =3D INDEX_op_brcond_i32; + op->args[0] =3D op->args[1]; + op->args[1] =3D op->args[3]; + op->args[2] =3D cond; + op->args[3] =3D label; + break; + + do_brcond_const: + if (i =3D=3D 0) { + tcg_op_remove(ctx->tcg, op); + return true; + } + op->opc =3D INDEX_op_br; + op->args[0] =3D label; + break; + } + return false; +} + static bool fold_call(OptContext *ctx, TCGOp *op) { TCGContext *s =3D ctx->tcg; @@ -1644,84 +1722,6 @@ void tcg_optimize(TCGContext *s) } break; =20 - case INDEX_op_brcond2_i32: - i =3D do_constant_folding_cond2(&op->args[0], &op->args[2], - op->args[4]); - if (i =3D=3D 0) { - do_brcond_false: - tcg_op_remove(s, op); - continue; - } - if (i > 0) { - do_brcond_true: - op->opc =3D opc =3D INDEX_op_br; - op->args[0] =3D op->args[5]; - break; - } - if ((op->args[4] =3D=3D TCG_COND_LT || op->args[4] =3D=3D TCG_= COND_GE) - && arg_is_const(op->args[2]) - && arg_info(op->args[2])->val =3D=3D 0 - && arg_is_const(op->args[3]) - && arg_info(op->args[3])->val =3D=3D 0) { - /* Simplify LT/GE comparisons vs zero to a single compare - vs the high word of the input. */ - do_brcond_high: - op->opc =3D opc =3D INDEX_op_brcond_i32; - op->args[0] =3D op->args[1]; - op->args[1] =3D op->args[3]; - op->args[2] =3D op->args[4]; - op->args[3] =3D op->args[5]; - break; - } - if (op->args[4] =3D=3D TCG_COND_EQ) { - /* Simplify EQ comparisons where one of the pairs - can be simplified. */ - i =3D do_constant_folding_cond(INDEX_op_brcond_i32, - op->args[0], op->args[2], - TCG_COND_EQ); - if (i =3D=3D 0) { - goto do_brcond_false; - } else if (i > 0) { - goto do_brcond_high; - } - i =3D do_constant_folding_cond(INDEX_op_brcond_i32, - op->args[1], op->args[3], - TCG_COND_EQ); - if (i =3D=3D 0) { - goto do_brcond_false; - } else if (i < 0) { - break; - } - do_brcond_low: - memset(&ctx.temps_used, 0, sizeof(ctx.temps_used)); - op->opc =3D INDEX_op_brcond_i32; - op->args[1] =3D op->args[2]; - op->args[2] =3D op->args[4]; - op->args[3] =3D op->args[5]; - break; - } - if (op->args[4] =3D=3D TCG_COND_NE) { - /* Simplify NE comparisons where one of the pairs - can be simplified. */ - i =3D do_constant_folding_cond(INDEX_op_brcond_i32, - op->args[0], op->args[2], - TCG_COND_NE); - if (i =3D=3D 0) { - goto do_brcond_high; - } else if (i > 0) { - goto do_brcond_true; - } - i =3D do_constant_folding_cond(INDEX_op_brcond_i32, - op->args[1], op->args[3], - TCG_COND_NE); - if (i =3D=3D 0) { - goto do_brcond_low; - } else if (i > 0) { - goto do_brcond_true; - } - } - break; - default: break; =20 @@ -1737,6 +1737,9 @@ void tcg_optimize(TCGContext *s) CASE_OP_32_64_VEC(andc): done =3D fold_andc(&ctx, op); break; + case INDEX_op_brcond2_i32: + done =3D fold_brcond2(&ctx, op); + break; CASE_OP_32_64(ctpop): done =3D fold_ctpop(&ctx, op); break; --=20 2.25.1