From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by sourceware.org (Postfix) with ESMTPS id 281BC383D806 for ; Thu, 1 Jul 2021 15:22:47 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 281BC383D806 Received: by mail-pg1-x532.google.com with SMTP id h4so6407045pgp.5 for ; Thu, 01 Jul 2021 08:22:47 -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:in-reply-to :references:mime-version:content-transfer-encoding; bh=OFh0CnpNIwfZ8I3cAw5N85slf5TreOmSiRlPUMUcabg=; b=BIpH2p2bOMLoQzdMMRmJ/7FQ4aoAgc4k67EiHNRj2hWoOT8KqAQX2dFpUACoYwAQG/ TdUqJaryO+eEvFCw1Jotc/IPx+L3sd0U9WO/G6BKAxj5eebWhGaRRoIXlvWAxXiInZLk y0NhftLYen3ZvHFEdpV1574KzVnVsl0BAaSWQNS9vGyC2XY2AGgrwVvezoeBCoXsAMZR 7TQzutv6BrpaAWPcLjgKyNvfLjGYk0jabq7p31Dbs9Xd7FhQ0PNsjuQvNdNrKPvSyzTh 3wp8lrxFbhq+GnbZl+3gDQTecYwSaybex61v5gmFJP78dVCn8+DudAXiqAc3IdNodLUz JHRw== X-Gm-Message-State: AOAM5335OOG1IJTc/3H34vtl3/HxOr/Cs8UnoO9TWPjst8O7Aljm3UA8 hivi9g2XNP7ufvi5fm7PxYU= X-Google-Smtp-Source: ABdhPJyavwbbcyf7HILHiRKLSTVD2/FgRK++z/0ONstRm6lcrigI2rdp82v4jbII2TN++l8ppoCtbA== X-Received: by 2002:a05:6a00:23d0:b029:2de:c1a2:f1e with SMTP id g16-20020a056a0023d0b02902dec1a20f1emr247820pfc.60.1625152966155; Thu, 01 Jul 2021 08:22:46 -0700 (PDT) Received: from gnu-cfl-2.localdomain ([172.56.39.115]) by smtp.gmail.com with ESMTPSA id y21sm328297pfb.120.2021.07.01.08.22.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jul 2021 08:22:45 -0700 (PDT) Received: from gnu-cfl-2.. (localhost [IPv6:::1]) by gnu-cfl-2.localdomain (Postfix) with ESMTP id 7B76EC035B; Thu, 1 Jul 2021 08:22:44 -0700 (PDT) From: "H.J. Lu" To: gcc-patches@gcc.gnu.org Cc: Richard Biener , Richard Sandiford , Uros Bizjak , Bernd Edlinger Subject: [PATCH v5 03/11] x86: Avoid stack realignment when copying data Date: Thu, 1 Jul 2021 08:22:36 -0700 Message-Id: <20210701152244.331984-4-hjl.tools@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210701152244.331984-1-hjl.tools@gmail.com> References: <20210701152244.331984-1-hjl.tools@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-3032.5 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_BARRACUDACENTRAL, 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: Thu, 01 Jul 2021 15:22:48 -0000 To avoid stack realignment, use SCRATCH_SSE_REG to copy data from one memory location to another. gcc/ * config/i386/i386-expand.c (ix86_expand_vector_move): Call ix86_gen_scratch_sse_rtx to get a scratch SSE register to copy data from one memory location to another. gcc/testsuite/ * gcc.target/i386/eh_return-1.c: New test. --- gcc/config/i386/i386-expand.c | 4 +++- gcc/testsuite/gcc.target/i386/eh_return-1.c | 26 +++++++++++++++++++++ 2 files changed, 29 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.target/i386/eh_return-1.c diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c index 5c9170e3a1d..6b009d523a5 100644 --- a/gcc/config/i386/i386-expand.c +++ b/gcc/config/i386/i386-expand.c @@ -602,7 +602,9 @@ ix86_expand_vector_move (machine_mode mode, rtx operands[]) && !register_operand (op0, mode) && !register_operand (op1, mode)) { - emit_move_insn (op0, force_reg (GET_MODE (op0), op1)); + rtx tmp = ix86_gen_scratch_sse_rtx (GET_MODE (op0)); + emit_move_insn (tmp, op1); + emit_move_insn (op0, tmp); return; } diff --git a/gcc/testsuite/gcc.target/i386/eh_return-1.c b/gcc/testsuite/gcc.target/i386/eh_return-1.c new file mode 100644 index 00000000000..671ba635e88 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/eh_return-1.c @@ -0,0 +1,26 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -march=haswell -mno-avx512f" } */ + +struct _Unwind_Context +{ + void *ra; + char array[48]; +}; + +extern long uw_install_context_1 (struct _Unwind_Context *); + +void +_Unwind_RaiseException (void) +{ + struct _Unwind_Context this_context, cur_context; + long offset = uw_install_context_1 (&this_context); + __builtin_memcpy (&this_context, &cur_context, + sizeof (struct _Unwind_Context)); + void *handler = __builtin_frob_return_addr ((&cur_context)->ra); + uw_install_context_1 (&cur_context); + __builtin_eh_return (offset, handler); +} + +/* { dg-final { scan-assembler-times "vmovdqu\[ \\t\]+\[^\n\]*%ymm" 4 } } */ +/* No need to dynamically realign the stack here. */ +/* { dg-final { scan-assembler-not "and\[^\n\r]*%\[re\]sp" } } */ -- 2.31.1