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GET /api/patches/2225804/?format=api
{ "id": 2225804, "url": "http://patchwork.ozlabs.org/api/patches/2225804/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/afefd51e-2edc-85ae-8e83-508b0c3820f1@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": "<afefd51e-2edc-85ae-8e83-508b0c3820f1@e124511.cambridge.arm.com>", "list_archive_url": null, "date": "2026-04-21T15:59:07", "name": "[v2,3/6] aarch64: Remove unused code for SAVED_LOCAL transition", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c1829fbcad31d865fa53ed7505e0dd66b0ef3cbc", "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/afefd51e-2edc-85ae-8e83-508b0c3820f1@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/2225804/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225804/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=gKp5ttP8;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=gKp5ttP8;\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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Ip=[4.158.2.129];\n Helo=[outbound-uk1.az.dlp.m.darktrace.com]", "X-MS-Exchange-CrossTenant-AuthSource": "\n DU6PEPF0000A7DD.eurprd02.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": "The SAVED_LOCAL state is only used as the result of an EH edge, where\nthe state transition happens automatically. Mode switching should not\ninsert any new transitions to SAVED_LOCAL state, so assert that this is\nthe case, and remove the resulting dead code.\n\ngcc/ChangeLog:\n\n\t* config/aarch64/aarch64.cc (aarch64_mode_emit_local_sme_state):\n\tAdd assert and remove subsequent handling.\n\ndisable transition to SAVED_LOCAL\n\nfixup saved local", "diff": "diff --git a/gcc/config/aarch64/aarch64.cc b/gcc/config/aarch64/aarch64.cc\nindex 693ce8b4d25cd8cef03e415ea1c033cb9311cb21..37b85c0a59553f48d535c93c3dc0295b631c52fd 100644\n--- a/gcc/config/aarch64/aarch64.cc\n+++ b/gcc/config/aarch64/aarch64.cc\n@@ -31928,6 +31928,10 @@ aarch64_mode_emit_local_sme_state (aarch64_local_sme_state mode,\n a known mode. */\n gcc_assert (prev_mode != aarch64_local_sme_state::ANY);\n \n+ /* SAVED_LOCAL state is entered automatically on EH edges. Mode switching\n+ should not emit any new transitions into this state. */\n+ gcc_assert (mode != aarch64_local_sme_state::SAVED_LOCAL);\n+\n if (prev_mode == aarch64_local_sme_state::INACTIVE_CALLER)\n {\n /* Commit any uncommitted lazy save. This leaves ZA either active\n@@ -32104,14 +32108,6 @@ aarch64_mode_emit_local_sme_state (aarch64_local_sme_state mode,\n return;\n }\n \n- if (mode == aarch64_local_sme_state::SAVED_LOCAL)\n- {\n- /* This is a transition to an exception handler. */\n- gcc_assert (prev_mode == aarch64_local_sme_state::OFF\n-\t\t || prev_mode == aarch64_local_sme_state::INACTIVE_LOCAL);\n- return;\n- }\n-\n gcc_unreachable ();\n }\n \n", "prefixes": [ "v2", "3/6" ] }