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GET /api/1.1/patches/2227908/?format=api
{ "id": 2227908, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2227908/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260424132541.1929445-1-christophe.lyon@arm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.1/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260424132541.1929445-1-christophe.lyon@arm.com>", "date": "2026-04-24T13:25:41", "name": "arm: Fix MVE load/store with writeback intrinsics [PR124870]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9d61149ad1be41381aad4c72ac6d653483b59672", "submitter": { "id": 83577, "url": "http://patchwork.ozlabs.org/api/1.1/people/83577/?format=api", "name": "Christophe Lyon", "email": "christophe.lyon@arm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260424132541.1929445-1-christophe.lyon@arm.com/mbox/", "series": [ { "id": 501362, "url": "http://patchwork.ozlabs.org/api/1.1/series/501362/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501362", "date": "2026-04-24T13:25:41", "name": "arm: Fix MVE load/store with writeback intrinsics [PR124870]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501362/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227908/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227908/checks/", "tags": {}, "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=selector1 header.b=JNSsQfHT;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=JNSsQfHT;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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dkim=pass (signature was verified)\n header.d=arm.com;dmarc=pass action=none header.from=arm.com;", "spf=pass (sender IP is 172.205.89.229)\n smtp.mailfrom=arm.com; dkim=none (message not signed)\n header.d=none;dmarc=pass action=none header.from=arm.com;" ], "Received-SPF": [ "Pass (protection.outlook.com: domain of arm.com designates\n 4.158.2.129 as permitted sender) receiver=protection.outlook.com;\n client-ip=4.158.2.129; helo=outbound-uk1.az.dlp.m.darktrace.com; pr=C", "Pass (protection.outlook.com: domain of arm.com designates\n 172.205.89.229 as permitted sender) receiver=protection.outlook.com;\n client-ip=172.205.89.229; helo=nebula.arm.com; pr=C" ], "From": "Christophe Lyon <christophe.lyon@arm.com>", "To": "<gcc-patches@gcc.gnu.org>", "CC": "<rguenther@suse.de>, <richard.earnshaw@arm.com>, <jakub@redhat.com>,\n Christophe Lyon <christophe.lyon@arm.com>", "Subject": "[PATCH] arm: Fix MVE load/store with writeback intrinsics [PR124870]", "Date": "Fri, 24 Apr 2026 13:25:41 +0000", "Message-ID": "<20260424132541.1929445-1-christophe.lyon@arm.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-EOPAttributedMessage": "1", "X-MS-TrafficTypeDiagnostic": "\n DB3PEPF00008859:EE_|AS8PR08MB8039:EE_|AMS0EPF0000019F:EE_|AS8PR08MB6600:EE_", "X-MS-Office365-Filtering-Correlation-Id": "df3e6c5f-2673-4aea-608d-08dea205229f", "x-checkrecipientrouted": "true", "NoDisclaimer": "true", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam-Untrusted": "BCL:0;\n ARA:13230040|376014|1800799024|82310400026|36860700016|18002099003|56012099003;", "X-Microsoft-Antispam-Message-Info-Original": "\n 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", "X-Forefront-Antispam-Report-Untrusted": "CIP:172.205.89.229; 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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n AMS0EPF0000019F.eurprd05.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Anonymous", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "These intrinsics (vldr*_gather_base_wb, vstr*_scatter_base_wb) lacked\nmodelling of memory accesses corresponding to writeback: in this case,\nthey both read and write memory.\n\nOK for trunk, gcc-16 and gcc-15?\n\nThanks,\n\nChristophe\n\n2024-04-24 Christophe Lyon <christophe.lyon@arm.com>\n\n\tPR target/124870\n\tgcc/\n\t* config/arm/arm-mve-builtins-base.cc (vstrq_scatter_base_impl)\n\t(vldrq_gather_base_impl): Fix call_properties.\n\n\tgcc/testsuite/\n\t* gcc.target/arm/mve/intrinsics/pr124870.c: New test.\n---\n gcc/config/arm/arm-mve-builtins-base.cc | 15 +++++++--\n .../gcc.target/arm/mve/intrinsics/pr124870.c | 31 +++++++++++++++++++\n 2 files changed, 44 insertions(+), 2 deletions(-)\n create mode 100644 gcc/testsuite/gcc.target/arm/mve/intrinsics/pr124870.c", "diff": "diff --git a/gcc/config/arm/arm-mve-builtins-base.cc b/gcc/config/arm/arm-mve-builtins-base.cc\nindex b344aca3f55..eaac4316d6b 100644\n--- a/gcc/config/arm/arm-mve-builtins-base.cc\n+++ b/gcc/config/arm/arm-mve-builtins-base.cc\n@@ -294,9 +294,12 @@ public:\n : m_to_int_mode (to_int_mode)\n {}\n \n- unsigned int call_properties (const function_instance &) const override\n+ unsigned int call_properties (const function_instance &fi) const override\n {\n- return CP_WRITE_MEMORY;\n+ if (fi.mode_suffix_id == MODE_wb)\n+ return CP_WRITE_MEMORY | CP_READ_MEMORY;\n+ else\n+ return CP_WRITE_MEMORY;\n }\n \n machine_mode memory_vector_mode (const function_instance &fi) const override\n@@ -480,6 +483,14 @@ public:\n return type_suffixes[suffix].vector_mode;\n }\n \n+ unsigned int call_properties (const function_instance &fi) const override\n+ {\n+ if (fi.mode_suffix_id == MODE_wb)\n+ return CP_WRITE_MEMORY | CP_READ_MEMORY;\n+ else\n+ return CP_READ_MEMORY;\n+ }\n+\n rtx expand (function_expander &e) const override\n {\n insn_code icode;\ndiff --git a/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr124870.c b/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr124870.c\nnew file mode 100644\nindex 00000000000..cfb41da8039\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/arm/mve/intrinsics/pr124870.c\n@@ -0,0 +1,31 @@\n+/* { dg-require-effective-target arm_v8_1m_mve_fp_ok } */\n+/* { dg-add-options arm_v8_1m_mve_fp } */\n+/* { dg-additional-options \"-O2\" } */\n+\n+/* PR target/124870. */\n+\n+#include <arm_mve.h>\n+\n+#ifdef __cplusplus\n+extern \"C\" {\n+#endif\n+\n+void fn (int n, uint32_t *strides, float32_t *f)\n+{\n+ uint32x4_t vecScGathAddr = vld1q_u32(strides);\n+ float32x4_t vecA = vldrwq_gather_base_wb_f32(&vecScGathAddr, 64);\n+ float32x4_t vecB = vecA;\n+ int i;\n+ for (i = 0; i < n; ++i)\n+ {\n+ vecA = vldrwq_gather_base_wb_f32(&vecScGathAddr, 64);\n+ vecB = vaddq_f32 (vecB, vecA);\n+ }\n+ vstrwq_f32 (f, vecB);\n+}\n+\n+#ifdef __cplusplus\n+}\n+#endif\n+\n+/* { dg-final { scan-assembler-times \"vadd.f32\\tq\\[0-9\\]+, q\\[0-9\\]+, q\\[0-9\\]+\" 1 } } */\n", "prefixes": [] }