From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by sourceware.org (Postfix) with ESMTPS id EA9D8397B83C for ; Wed, 4 Aug 2021 13:20:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org EA9D8397B83C Received: by mail-pj1-x1036.google.com with SMTP id nh14so2929407pjb.2 for ; Wed, 04 Aug 2021 06:20:07 -0700 (PDT) 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:mime-version :content-transfer-encoding; bh=RuWe9Lga+5eJfv18W2Gbho78jXo1K8s7Nyx2UKO7maw=; b=fH8bLnA66DTKNBkj1K7x850cASZc9vL4rjX9na1nkrTVRQHPyh/OJNeBTWUGquWlZP ozyVksupdGytV2XOZlvbaAcOWRCbiGU9cVDAZ+R5weftaBFALgQEyTi0FgWLhX9rAswm m/Ox3U15Kqt5LxiOlHRSVpVTCtqd4CIfcr9UwA1Q4ivd1uID3Wau3ifcePmuw5VYRXhM Yjmxor1leGQRxyVhulvAk/BiFWS29bofOoomTfWUoblWuJuUJGySVpGHKG+VTpWS/ibm pHo7Q2Iz6iCOoK0YvKsvUkRXwhnoHSUSryhh69zJQApSmbHgrgpMJ7AfkETucTCeCBqa YHow== X-Gm-Message-State: AOAM5322JGgFUB+VnmznF1tKKKG4xHre6cV9ZbV2abtkw7CbOMZJcuH3 q0Msol2113jdWNYeO5BA0VP/crUIqZY= X-Google-Smtp-Source: ABdhPJz1DnqJYWENgayVNvGE9C0SjewCwHXihMLwTo/L58sKP8ODgsKwpF8Fvpn8dZ38aKpV3+QTbA== X-Received: by 2002:a63:4e4a:: with SMTP id o10mr1152997pgl.350.1628083206473; Wed, 04 Aug 2021 06:20:06 -0700 (PDT) Received: from gnu-cfl-2.localdomain ([172.58.38.240]) by smtp.gmail.com with ESMTPSA id 6sm3107364pfg.108.2021.08.04.06.20.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Aug 2021 06:20:05 -0700 (PDT) Received: from gnu-tgl-2.localdomain (gnu-tgl-2 [192.168.1.34]) by gnu-cfl-2.localdomain (Postfix) with ESMTPS id 19561C007F; Wed, 4 Aug 2021 06:20:04 -0700 (PDT) Received: from gnu-tgl-2.lan (localhost [IPv6:::1]) by gnu-tgl-2.localdomain (Postfix) with ESMTP id EA9863002BA; Wed, 4 Aug 2021 06:19:53 -0700 (PDT) From: "H.J. Lu" To: gcc-patches@gcc.gnu.org Subject: [PATCH] x86: Avoid stack realignment when copying data with SSE register Date: Wed, 4 Aug 2021 06:19:53 -0700 Message-Id: <20210804131953.2868697-1-hjl.tools@gmail.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-3033.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 04 Aug 2021 13:20:12 -0000 To avoid stack realignment, call ix86_gen_scratch_sse_rtx to get a scratch SSE register to copy data with with SSE register from one memory location to another. gcc/ PR target/101772 * config/i386/i386-expand.c (ix86_expand_vector_move): Call ix86_gen_scratch_sse_rtx to get a scratch SSE register to copy data with SSE register from one memory location to another. gcc/testsuite/ PR target/101772 * gcc.target/i386/eh_return-2.c: New test. --- gcc/config/i386/i386-expand.c | 6 +++++- gcc/testsuite/gcc.target/i386/eh_return-2.c | 16 ++++++++++++++++ 2 files changed, 21 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.target/i386/eh_return-2.c diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c index 1d469bf7221..bd21efa9530 100644 --- a/gcc/config/i386/i386-expand.c +++ b/gcc/config/i386/i386-expand.c @@ -613,7 +613,11 @@ ix86_expand_vector_move (machine_mode mode, rtx operands[]) arguments in memory. */ if (!register_operand (op0, mode) && !register_operand (op1, mode)) - op1 = force_reg (mode, op1); + { + rtx scratch = ix86_gen_scratch_sse_rtx (mode); + emit_move_insn (scratch, op1); + op1 = scratch; + } tmp[0] = op0; tmp[1] = op1; ix86_expand_vector_move_misalign (mode, tmp); diff --git a/gcc/testsuite/gcc.target/i386/eh_return-2.c b/gcc/testsuite/gcc.target/i386/eh_return-2.c new file mode 100644 index 00000000000..f23f4492dac --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/eh_return-2.c @@ -0,0 +1,16 @@ +/* PR target/101772 */ +/* { dg-do compile } */ +/* { dg-additional-options "-O0 -march=x86-64 -mstackrealign" } */ + +struct _Unwind_Context _Unwind_Resume_or_Rethrow_this_context; + +void offset (int); + +struct _Unwind_Context { + void *reg[7]; +} _Unwind_Resume_or_Rethrow() { + struct _Unwind_Context cur_contextcur_context = + _Unwind_Resume_or_Rethrow_this_context; + offset(0); + __builtin_eh_return ((long) offset, 0); +} -- 2.31.1