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GET /api/patches/2225512/?format=api
{ "id": 2225512, "url": "http://patchwork.ozlabs.org/api/patches/2225512/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/aecTzk_qu3pwvpEf@tucnak/", "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": "<aecTzk_qu3pwvpEf@tucnak>", "list_archive_url": null, "date": "2026-04-21T06:06:06", "name": "c++: Fix up iterating expansion stmt b and e var handling [PR124927]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ec8557dd5447abdc0d7ed9154913a56fd115597b", "submitter": { "id": 671, "url": "http://patchwork.ozlabs.org/api/people/671/?format=api", "name": "Jakub Jelinek", "email": "jakub@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/aecTzk_qu3pwvpEf@tucnak/mbox/", "series": [ { "id": 500737, "url": "http://patchwork.ozlabs.org/api/series/500737/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500737", "date": "2026-04-21T06:06:06", "name": "c++: Fix up iterating expansion stmt b and e var handling [PR124927]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500737/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225512/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225512/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=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=hCyRoRzo;\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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Tue, 21 Apr 2026 06:06:10 +0000 (UTC)", "from tucnak.zalov.cz (unknown [10.44.48.12])\n by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with\n ESMTPS\n id BC879195608E; Tue, 21 Apr 2026 06:06:09 +0000 (UTC)", "from tucnak.zalov.cz (localhost [127.0.0.1])\n by tucnak.zalov.cz (8.18.1/8.18.1) with ESMTPS id 63L667C4886149\n (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT);\n Tue, 21 Apr 2026 08:06:07 +0200", "(from jakub@localhost)\n by tucnak.zalov.cz (8.18.1/8.18.1/Submit) id 63L666sP886148;\n Tue, 21 Apr 2026 08:06:06 +0200" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 8750A4BA900D", "OpenDKIM Filter v2.11.0 sourceware.org 4620B4BA2E30" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 4620B4BA2E30", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 4620B4BA2E30", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1776751573; cv=none;\n b=jTIg7Ktj5yQnsbdioj/qs8ZuyxLpR/S1B8Lb0yh121Zzzkb2uJSIi26HetbqJezbxSLHKsicQ/RjEi+ERjoBpaiQ3BT98sktl5D9nh85ERwabeGy+Il3n2eM5ST2lWAnRszTrjNiqj7V85FDq9UVanwJPGV5pRGbg+JD2LLsz1k=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1776751573; c=relaxed/simple;\n bh=7ihh6aDZnXzMXbmt2qszTFWlB80P5XP6zDPbDyTACZM=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=ezbUnzpgQZp37asJjRp2DZLZV/1NU8VDIfCErGsyC6THmT6iG3QquEWKRaggzk2mQPeHpPEyWcP5W05c8kzas/ZEoFmcgkY+FuSRURyERKCMWNHN8wMgzIwpO+1XDZtbqmgOe3kYSf5o1dlAd2I4iOTeyxXeU++5MhG8rtZzWto=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1776751573;\n h=from:from:reply-to:reply-to:subject:subject:date:date:\n message-id:message-id:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=fu/KhM2FzkC/aA0p6q/FBeoAd8gn/1gOStpfDQhL+fQ=;\n b=hCyRoRzosDVeA3WyM++EyvwChqTXXj9QoueF2bIblQtMOP9MCEozYnA8QVp0cgcWLh5Aiu\n t2RGEFQDVKfg0PiCdYx4fSDBPcyCDjnMnMwEI0UHLYubWObkJS6wggzV2E6GIv248n6z4/\n pFGdM0+wylktVlON1QC1imBZzuEtBO4=", "X-MC-Unique": "tF2KC3DiN0GuuUsAWbsDCw-1", "X-Mimecast-MFC-AGG-ID": "tF2KC3DiN0GuuUsAWbsDCw_1776751570", "Date": "Tue, 21 Apr 2026 08:06:06 +0200", "From": "Jakub Jelinek <jakub@redhat.com>", "To": "Jason Merrill <jason@redhat.com>", "Cc": "gcc-patches@gcc.gnu.org", "Subject": "[PATCH] c++: Fix up iterating expansion stmt b and e var handling\n [PR124927]", "Message-ID": "<aecTzk_qu3pwvpEf@tucnak>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.0 on 10.30.177.17", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "IvfP3YLFLt_08r9Ks-hQVafKpkD5642opbNon-XuCt4_1776751570", "X-Mimecast-Originator": "redhat.com", "Content-Type": "text/plain; charset=us-ascii", "Content-Disposition": "inline", "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>", "Reply-To": "Jakub Jelinek <jakub@redhat.com>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Hi!\n\nThe following testcase ICEs, because the TARGET_EXPR it had has VOID_TYPE\nTARGET_EXPR_INITIAL and force_target_expr obviously ICEs when trying to\ncreate a VOID_TYPE TARGET_EXPR.\n\nThis patch fixes it by taking the cv_unqualified type of the TARGET_EXPRs\nbefore we extract their TARGET_EXPR_INITIAL, so it does the desirable thing\nof recreating the TARGET_EXPRs with cv unqualified types.\n\nBootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?\n\n2026-04-21 Jakub Jelinek <jakub@redhat.com>\n\n\tPR c++/124927\n\t* pt.cc (finish_expansion_stmt): Compute types for force_target_expr\n\tfrom b and e before extracting TARGET_EXPR_INITIAL from it.\n\n\t* g++.dg/cpp26/expansion-stmt41.C: New test.\n\n\n\tJakub", "diff": "--- gcc/cp/pt.cc.jj\t2026-04-16 18:56:51.668066801 +0200\n+++ gcc/cp/pt.cc\t2026-04-20 13:30:31.137795700 +0200\n@@ -33499,14 +33499,14 @@ finish_expansion_stmt (tree expansion_st\n \t so that e.g. b can be incremented, so unwrap the TARGET_EXPRs\n \t and force TARGET_EXPR with the cv-unqualified type which is\n \t a hack replacement for a VAR_DECL in a lambda. */\n+\t tree btype = cv_unqualified (TREE_TYPE (b));\n+\t tree etype = cv_unqualified (TREE_TYPE (e));\n \t if (TREE_CODE (b) == TARGET_EXPR)\n \t b = TARGET_EXPR_INITIAL (b);\n \t if (TREE_CODE (e) == TARGET_EXPR)\n \t e = TARGET_EXPR_INITIAL (e);\n-\t b = force_target_expr (cv_unqualified (TREE_TYPE (b)), b,\n-\t\t\t\t tf_warning_or_error);\n-\t e = force_target_expr (cv_unqualified (TREE_TYPE (e)), e,\n-\t\t\t\t tf_warning_or_error);\n+\t b = force_target_expr (btype, b, tf_warning_or_error);\n+\t e = force_target_expr (etype, e, tf_warning_or_error);\n \t tree w = build_stmt (loc, WHILE_STMT, NULL_TREE, NULL_TREE,\n \t\t\t NULL_TREE, NULL_TREE, NULL_TREE);\n \t tree r = get_target_expr (build_zero_cst (ptrdiff_type_node));\n--- gcc/testsuite/g++.dg/cpp26/expansion-stmt41.C.jj\t2026-04-20 13:49:08.090898732 +0200\n+++ gcc/testsuite/g++.dg/cpp26/expansion-stmt41.C\t2026-04-20 13:54:28.439482931 +0200\n@@ -0,0 +1,28 @@\n+// PR c++/124927\n+// { dg-do run { target c++23 } }\n+// { dg-options \"\" }\n+\n+#include <array>\n+#include <ranges>\n+\n+constexpr std::array a { 1, 2, 3, 4, 5 };\n+constexpr std::array b { 5, 4, 3, 2, 1 };\n+\n+int\n+foo (int i)\n+{\n+ template for (constexpr auto z : std::views::zip (a, b)) // { dg-warning \"'template for' only available with\" \"\" { target c++23_down } }\n+ if (i == get <0> (z))\n+ return get <1> (z);\n+ return 0;\n+}\n+\n+int\n+main ()\n+{\n+ for (int i = 1; i <= 5; ++i)\n+ if (foo (i) != 6 - i)\n+ __builtin_abort ();\n+ if (foo (0) != 0 || foo (6) != 0)\n+ __builtin_abort ();\n+}\n", "prefixes": [] }