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GET /api/1.1/patches/2231931/?format=api
{ "id": 2231931, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2231931/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260501153302.2595141-1-artemiy.volkov@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": "<20260501153302.2595141-1-artemiy.volkov@arm.com>", "date": "2026-05-01T15:32:47", "name": "[v2] forwprop: allow more VPEs in simplify_vector_constructor () [PR122679]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "19f5a13f49f9439135093f6d2594e3cffc99bc3b", "submitter": { "id": 91911, "url": "http://patchwork.ozlabs.org/api/1.1/people/91911/?format=api", "name": "Artemiy Volkov", "email": "artemiy.volkov@arm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260501153302.2595141-1-artemiy.volkov@arm.com/mbox/", "series": [ { "id": 502475, "url": "http://patchwork.ozlabs.org/api/1.1/series/502475/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=502475", "date": "2026-05-01T15:32:47", "name": "[v2] forwprop: allow more VPEs in simplify_vector_constructor () [PR122679]", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/502475/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231931/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231931/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=Jw5pRHL9;\n\tdkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com\n header.a=rsa-sha256 header.s=selector1 header.b=Jw5pRHL9;\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": "Artemiy Volkov <artemiy.volkov@arm.com>", "To": "<gcc-patches@gcc.gnu.org>", "CC": "<rguenther@suse.de>, <andrew.pinski@oss.qualcomm.com>,\n <christophe.lyon@arm.com>, Artemiy Volkov <artemiy.volkov@arm.com>", "Subject": "[PATCH v2] forwprop: allow more VPEs in simplify_vector_constructor\n () [PR122679]", "Date": "Fri, 1 May 2026 15:32:47 +0000", "Message-ID": "<20260501153302.2595141-1-artemiy.volkov@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 AM4PEPF00025F95:EE_|FRZPR08MB10901:EE_|AMS0EPF00000195:EE_|DBBPR08MB6314:EE_", "X-MS-Office365-Filtering-Correlation-Id": "4eb68d95-4b87-4847-a8a6-08dea79719b9", "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|82310400026|1800799024|36860700016|376014|13003099007|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 AMS0EPF00000195.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": "Hi,\n\nrespinning\nhttps://gcc.gnu.org/pipermail/gcc-patches/2026-January/706444.html with\nsubconditions of the new if statements reordered, so that the cheaper\ncheck is performed first. OK for trunk?\n\nThanks,\nArtemiy\n\n------------------------>8---------------------\n\nCurrently, simplify_vector_constructor () tries to rewrite a CONSTRUCTOR\nexpression into a VEC_PERM_EXPR, as long as constructor elements all come\nfrom 1 or 2 source vectors. While doing so, it protects against creating\nVEC_PERM_EXPRs unsupported by the target by calling can_vec_perm_const_p\n() before enacting the transformation and bailing when that returns false.\n\nHowever, we can instead allow those VEC_PERM_EXPRs to be created if we\nknow that a later vector lowering pass will legitimize them for us. IOW,\nonly if the target doesn't support the resulting permute and the\nPROP_gimple_lvec property is already set, do we give up. This patch\ninserts the required checks.\n\nThis also allows us to remove the unnecessary vect_int requirement\n(wrongly added in r16-5244-g5a2319b71e4d30) from forwprop-43.c.\n\n(Re-)regtested on aarch64, arm, and x86_64.\n\n\tPR tree-optimization/112679\n\ngcc/ChangeLog:\n\n\t* tree-ssa-forwprop.cc (simplify_vector_constructor): Check the\n\tPROP_gimple_lvec property before returning false.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.dg/tree-ssa/forwprop-43.c: Remove the vect_int check.\n---\n gcc/testsuite/gcc.dg/tree-ssa/forwprop-43.c | 1 -\n gcc/tree-ssa-forwprop.cc | 6 ++++--\n 2 files changed, 4 insertions(+), 3 deletions(-)", "diff": "diff --git a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-43.c b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-43.c\nindex b144687261b..b7d069bb5b6 100644\n--- a/gcc/testsuite/gcc.dg/tree-ssa/forwprop-43.c\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/forwprop-43.c\n@@ -1,7 +1,6 @@\n /* { dg-do compile } */\n /* { dg-options \"-O2 -fdump-tree-forwprop1 -Wno-psabi\" } */\n /* { dg-require-effective-target stdint_types } */\n-/* { dg-require-effective-target vect_int } */\n /* { dg-additional-options \"-fgimple\" } */\n /* { dg-additional-options \"-msse2\" { target ia32 } } */\n \ndiff --git a/gcc/tree-ssa-forwprop.cc b/gcc/tree-ssa-forwprop.cc\nindex f060275d72d..18b9221908b 100644\n--- a/gcc/tree-ssa-forwprop.cc\n+++ b/gcc/tree-ssa-forwprop.cc\n@@ -4246,7 +4246,8 @@ simplify_vector_constructor (gimple_stmt_iterator *gsi)\n \t\t\t ? 0 : refnelts) + i);\n vec_perm_indices indices (sel, orig[1] ? 2 : 1, refnelts);\n machine_mode vmode = TYPE_MODE (perm_type);\n- if (!can_vec_perm_const_p (vmode, vmode, indices))\n+ if ((cfun->curr_properties & PROP_gimple_lvec)\n+\t && !can_vec_perm_const_p (vmode, vmode, indices))\n \treturn false;\n mask_type = build_vector_type (ssizetype, refnelts);\n tree op2 = vec_perm_indices_to_tree (mask_type, indices);\n@@ -4311,7 +4312,8 @@ simplify_vector_constructor (gimple_stmt_iterator *gsi)\n \t\t\t ? elts[i].second + nelts : i);\n \t vec_perm_indices indices (sel, 2, nelts);\n \t machine_mode vmode = TYPE_MODE (type);\n-\t if (!can_vec_perm_const_p (vmode, vmode, indices))\n+\t if ((cfun->curr_properties & PROP_gimple_lvec)\n+\t && !can_vec_perm_const_p (vmode, vmode, indices))\n \t return false;\n \t mask_type = build_vector_type (ssizetype, nelts);\n \t blend_op2 = vec_perm_indices_to_tree (mask_type, indices);\n", "prefixes": [ "v2" ] }