From patchwork Thu Apr 18 20:02:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 1925271 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4VL7xx6Xwvz1yPv for ; Fri, 19 Apr 2024 06:03:32 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rxXxu-0001VL-Vd; Thu, 18 Apr 2024 16:02:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rxXxn-0001UN-GW; Thu, 18 Apr 2024 16:02:33 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rxXxl-0005Fp-FZ; Thu, 18 Apr 2024 16:02:31 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 346515FE09; Thu, 18 Apr 2024 23:02:27 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 9647BB93EF; Thu, 18 Apr 2024 23:02:24 +0300 (MSK) Received: (nullmailer pid 952842 invoked by uid 1000); Thu, 18 Apr 2024 20:02:24 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Richard Henderson , Michael Tokarev Subject: [Stable-7.2.11 42/59] tcg/optimize: Do not attempt to constant fold neg_vec Date: Thu, 18 Apr 2024 23:02:02 +0300 Message-Id: <20240418200224.952785-1-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Richard Henderson Split out the tail of fold_neg to fold_neg_no_const so that we can avoid attempting to constant fold vector negate. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2150 Signed-off-by: Richard Henderson (cherry picked from commit e25fe886b89a396bae5847520b70c148587d490a) Signed-off-by: Michael Tokarev (Mjt: context fixup in tests/tcg/aarch64/Makefile.target) diff --git a/tcg/optimize.c b/tcg/optimize.c index b6f6436c74..100b75efd8 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -1634,16 +1634,10 @@ static bool fold_nand(OptContext *ctx, TCGOp *op) return false; } -static bool fold_neg(OptContext *ctx, TCGOp *op) +static bool fold_neg_no_const(OptContext *ctx, TCGOp *op) { - uint64_t z_mask; - - if (fold_const1(ctx, op)) { - return true; - } - /* Set to 1 all bits to the left of the rightmost. */ - z_mask = arg_info(op->args[1])->z_mask; + uint64_t z_mask = arg_info(op->args[1])->z_mask; ctx->z_mask = -(z_mask & -z_mask); /* @@ -1654,6 +1648,11 @@ static bool fold_neg(OptContext *ctx, TCGOp *op) return true; } +static bool fold_neg(OptContext *ctx, TCGOp *op) +{ + return fold_const1(ctx, op) || fold_neg_no_const(ctx, op); +} + static bool fold_nor(OptContext *ctx, TCGOp *op) { if (fold_const2_commutative(ctx, op) || @@ -1949,7 +1948,7 @@ static bool fold_sub_to_neg(OptContext *ctx, TCGOp *op) if (have_neg) { op->opc = neg_op; op->args[1] = op->args[2]; - return fold_neg(ctx, op); + return fold_neg_no_const(ctx, op); } return false; } diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target index 474f61bc30..bd29446835 100644 --- a/tests/tcg/aarch64/Makefile.target +++ b/tests/tcg/aarch64/Makefile.target @@ -10,7 +10,7 @@ VPATH += $(AARCH64_SRC) # Base architecture tests AARCH64_TESTS=fcvt pcalign-a64 -AARCH64_TESTS += test-2248 +AARCH64_TESTS += test-2248 test-2150 fcvt: LDFLAGS+=-lm diff --git a/tests/tcg/aarch64/test-2150.c b/tests/tcg/aarch64/test-2150.c new file mode 100644 index 0000000000..fb86c11958 --- /dev/null +++ b/tests/tcg/aarch64/test-2150.c @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* See https://gitlab.com/qemu-project/qemu/-/issues/2150 */ + +int main() +{ + asm volatile( + "movi v6.4s, #1\n" + "movi v7.4s, #0\n" + "sub v6.2d, v7.2d, v6.2d\n" + : : : "v6", "v7"); + return 0; +}