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GET /api/1.1/patches/2231972/?format=api
{ "id": 2231972, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2231972/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/b9e8a06e2d1fb139f4d3e06159c1784e359074ab.camel@tugraz.at/", "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": "<b9e8a06e2d1fb139f4d3e06159c1784e359074ab.camel@tugraz.at>", "date": "2026-05-01T19:21:34", "name": "[C] argument expressions may be evaluated too often by typeof [PR124576]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "a5ea67eb81943955e553c7420ad699794e944226", "submitter": { "id": 85465, "url": "http://patchwork.ozlabs.org/api/1.1/people/85465/?format=api", "name": "Martin Uecker", "email": "uecker@tugraz.at" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/b9e8a06e2d1fb139f4d3e06159c1784e359074ab.camel@tugraz.at/mbox/", "series": [ { "id": 502491, "url": "http://patchwork.ozlabs.org/api/1.1/series/502491/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=502491", "date": "2026-05-01T19:21:34", "name": "[C] argument expressions may be evaluated too often by typeof [PR124576]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502491/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2231972/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2231972/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=tugraz.at header.i=@tugraz.at header.a=rsa-sha256\n header.s=mailrelay header.b=EUEkWaU8;\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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charset=\"UTF-8\"", "Content-Transfer-Encoding": "quoted-printable", "User-Agent": "Evolution 3.56.2-0+deb13u1 ", "MIME-Version": "1.0", "X-TUG-Backscatter-control": "G/VXY7/6zeyuAY/PU2/0qw", "X-Scanned-By": "MIMEDefang 2.74 on 129.27.10.117", "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": "Bootstrapped and regression tested on x86_64\n\n\n c: argument expressions may be evaluated too often by typeof [PR124576]\n \n When there are multiple declarators in a declaration and the type\n is specified via typeof, an expression inside the argument of\n typeof may be evaluated multiple times. Fix this by adding a\n save expression.\n \n PR c/124576\n \n gcc/c/ChangeLog:\n * c-decl.cc (declspecs_add_type): Add save_expr.\n \n gcc/testsuite/ChangeLog:\n * pr124576.c: New test.", "diff": "diff --git a/gcc/c/c-decl.cc b/gcc/c/c-decl.cc\nindex 5e5193ed880..cc07e05e336 100644\n--- a/gcc/c/c-decl.cc\n+++ b/gcc/c/c-decl.cc\n@@ -13136,11 +13136,12 @@ declspecs_add_type (location_t loc, struct c_declspecs *specs,\n \t }\n \t if (spec.expr)\n \t {\n+\t tree expr = save_expr (fold_convert (void_type_node, spec.expr));\n \t if (specs->expr)\n-\t\tspecs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (spec.expr),\n-\t\t\t\t specs->expr, spec.expr);\n+\t\tspecs->expr = build2 (COMPOUND_EXPR, TREE_TYPE (expr),\n+\t\t\t\t specs->expr, expr);\n \t else\n-\t\tspecs->expr = spec.expr;\n+\t\tspecs->expr = expr;\n \t specs->expr_const_operands &= spec.expr_const_operands;\n \t }\n \t}\ndiff --git a/gcc/testsuite/gcc.dg/pr124576.c b/gcc/testsuite/gcc.dg/pr124576.c\nnew file mode 100644\nindex 00000000000..b66969d60fa\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/pr124576.c\n@@ -0,0 +1,12 @@\n+/* { dg-do run } */\n+/* { dg-options \"-std=c99\" } */\n+\n+int main()\n+{\n+ int i = 0;\n+ int j = 0;\n+ __typeof__((__typeof__(int[i++])*)(j++, (void*)0)) a, b, c;\n+ if (1 != j)\n+\t __builtin_abort();\n+}\n+\n", "prefixes": [ "C" ] }