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GET /api/patches/2225801/?format=api
{ "id": 2225801, "url": "http://patchwork.ozlabs.org/api/patches/2225801/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/415d9c7c-eab4-632f-de4a-34ec50caeebe@e124511.cambridge.arm.com/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/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, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<415d9c7c-eab4-632f-de4a-34ec50caeebe@e124511.cambridge.arm.com>", "list_archive_url": null, "date": "2026-04-21T15:57:58", "name": "[v2,1/6] aarch64: Add ZTO_REGNUM and SME_STATE_REGNUM use to movt", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "00f87b02341681c96e70dea53eea568190c74a9c", "submitter": { "id": 90594, "url": "http://patchwork.ozlabs.org/api/people/90594/?format=api", "name": "Alice Carlotti", "email": "alice.carlotti@arm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/415d9c7c-eab4-632f-de4a-34ec50caeebe@e124511.cambridge.arm.com/mbox/", "series": [ { "id": 500843, "url": "http://patchwork.ozlabs.org/api/series/500843/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500843", "date": "2026-04-21T15:57:04", "name": "aarch64: SME ZA/ZT0 fixes", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/500843/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225801/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225801/checks/", "tags": {}, "related": [], "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=BFABrStv;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=BFABrStv;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; 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dkim=pass (signature was verified)\n header.d=arm.com;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", "Authentication-Results-Original": "dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=arm.com;", "Date": "Tue, 21 Apr 2026 16:57:58 +0100", "From": "Alice Carlotti <alice.carlotti@arm.com>", "To": "gcc-patches@gcc.gnu.org", "Cc": "Richard Sandiford <richard.sandiford@arm.com>,\n Richard Earnshaw <richard.earnshaw@arm.com>,\n Tamar Christina <tamar.christina@arm.com>,\n Kyrylo Tkachov <ktkachov@nvidia.com>, Alex Coplan <alex.coplan@arm.com>,\n Andrew Pinski <andrew.pinski@oss.qualcomm.com>,\n Wilco Dijkstra <wilco.dijkstra@arm.com>", "Subject": "[PATCH v2 1/6] aarch64: Add ZTO_REGNUM and SME_STATE_REGNUM use to\n movt", "Message-ID": "<415d9c7c-eab4-632f-de4a-34ec50caeebe@e124511.cambridge.arm.com>", "References": "<9587777e-dc1e-51c2-0c33-d1192dfc568d@e124511.cambridge.arm.com>", "Content-Type": "text/plain; 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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n AMS0EPF000001AD.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": "Also replace unspec_volatile with plain unspec - there no need to\nprevent dead code elimination if the dependencies are correct.\n\ngcc/ChangeLog:\n\n\t* config/aarch64/aarch64-sme.md (aarch64_sme_write_zt): Add\n\tZTO_REGNUM use and make unspec non-volatile.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.target/aarch64/sme/zt0_state_8.c: New test.", "diff": "diff --git a/gcc/config/aarch64/aarch64-sme.md b/gcc/config/aarch64/aarch64-sme.md\nindex f24e91997fd640f82c11353dd196fe334daec630..7091f566ba8defc17dd0087f04d38c7bfe1a0834 100644\n--- a/gcc/config/aarch64/aarch64-sme.md\n+++ b/gcc/config/aarch64/aarch64-sme.md\n@@ -1067,8 +1067,10 @@\n ;; __arm_streaming __arm_out (\"zt0\");\n (define_insn \"@aarch64_sme_write_zt<SVE_FULL:mode>\"\n [(set (reg:V8DI ZT0_REGNUM)\n-\t(unspec_volatile:V8DI\n-\t [(match_operand:SVE_FULL 0 \"register_operand\" \"w\")\n+\t(unspec:V8DI\n+\t [(reg:V8DI ZT0_REGNUM)\n+\t (reg:DI SME_STATE_REGNUM)\n+\t (match_operand:SVE_FULL 0 \"register_operand\" \"w\")\n \t (match_operand:DI 1 \"const_int_operand\")]\n \t UNSPEC_SME_WRITE))]\n \"TARGET_SME_LUTv2 && TARGET_STREAMING\"\ndiff --git a/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c b/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c\nnew file mode 100644\nindex 0000000000000000000000000000000000000000..8eb3d424f539d8a645a9889f465ac9013048b5f5\n--- /dev/null\n+++ b/gcc/testsuite/gcc.target/aarch64/sme/zt0_state_8.c\n@@ -0,0 +1,14 @@\n+// { dg-options \"-O3 -fomit-frame-pointer -fno-optimize-sibling-calls\" }\n+\n+#include <arm_sme.h>\n+\n+#pragma GCC target \"+sme2+sme-lutv2\"\n+\n+__arm_streaming __arm_inout(\"zt0\")\n+void foo(svfloat32_t z)\n+{\n+ svzero_zt (0);\n+ svwrite_lane_zt_f32 (0, z, 1);\n+}\n+\n+// { dg-final { scan-assembler \"zero\" } }\n", "prefixes": [ "v2", "1/6" ] }