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GET /api/patches/2217728/?format=api
{ "id": 2217728, "url": "http://patchwork.ozlabs.org/api/patches/2217728/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260330123443.D98954BA9019@sourceware.org/", "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": "<20260330123443.D98954BA9019@sourceware.org>", "list_archive_url": null, "date": "2026-03-30T12:33:47", "name": "tree-optimization/124692 - update stmt before folding", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "3c65f60948d5fc838c4c9df1c86111cae4c79aec", "submitter": { "id": 4338, "url": "http://patchwork.ozlabs.org/api/people/4338/?format=api", "name": "Richard Biener", "email": "rguenther@suse.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260330123443.D98954BA9019@sourceware.org/mbox/", "series": [ { "id": 498020, "url": "http://patchwork.ozlabs.org/api/series/498020/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=498020", "date": "2026-03-30T12:33:47", "name": "tree-optimization/124692 - update stmt before folding", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498020/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217728/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217728/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=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=lk+kWZs6;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=YWPX+ttA;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=y2K5xR0n;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=FuL4Qc1p;\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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a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1774874028;\n h=from:from:reply-to:date:date:to:to:cc:mime-version:mime-version:\n content-type:content-type; bh=lYYVpBwOzCeq0Pidk302zNJEAsrzV3gm4PNiYIHjaJo=;\n b=YWPX+ttAnYfogS/cUBfQCtqvAG0VbT3GOSBOckPwswxmbD39L02BlxHYTxnODr/SakBxjV\n X8+MJQv3IRRp/2Aw==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1774874027;\n h=from:from:reply-to:date:date:to:to:cc:mime-version:mime-version:\n content-type:content-type; bh=lYYVpBwOzCeq0Pidk302zNJEAsrzV3gm4PNiYIHjaJo=;\n b=y2K5xR0nrzMiHc1UZ/gEmDZ+hhhLX3ODTLcriFg+KSem4VuADhCSDU2Opo6pPhXaYEjhcA\n VUGjakttnWaykCk/M75W1E0dJGcDtv/zCx84jITZWyv9L34KCipmwilRu7oQ0Y1fbcMIbD\n Oi0xkZoaansDK2Tee4DBZJsz7JyKCEA=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1774874027;\n h=from:from:reply-to:date:date:to:to:cc:mime-version:mime-version:\n content-type:content-type; bh=lYYVpBwOzCeq0Pidk302zNJEAsrzV3gm4PNiYIHjaJo=;\n b=FuL4Qc1pDJStRIjJk4WbKf1PAANQVqvdARu1k8rbYAWLQ++c8CHuUcYoPQDKmPqGgNLrNK\n GpBIaSM654DuWeCw==" ], "Date": "Mon, 30 Mar 2026 14:33:47 +0200 (CEST)", "From": "Richard Biener <rguenther@suse.de>", "To": "gcc-patches@gcc.gnu.org", "Subject": "[PATCH] tree-optimization/124692 - update stmt before folding", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=US-ASCII", "X-Spamd-Result": "default: False [-1.80 / 50.00]; BAYES_HAM(-3.00)[100.00%];\n MISSING_MID(2.50)[]; NEURAL_HAM_LONG(-1.00)[-0.998];\n NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain];\n TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_ONE(0.00)[1];\n MISSING_XM_UA(0.00)[]; FROM_EQ_ENVFROM(0.00)[];\n TO_DN_NONE(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_ZERO(0.00)[0];\n FUZZY_RATELIMITED(0.00)[rspamd.com];\n DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n MIME_TRACE(0.00)[0:+]; FROM_HAS_DN(0.00)[]", "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", "Message-Id": "<20260330123443.D98954BA9019@sourceware.org>" }, "content": "The following makes sure SSA operands are up-to-date before folding.\nEsp. when replace_uses_by is invoked from SCEV cprop which now has\nranger enabled we can otherwise end up ICEing where purpoted SSA\nnames now are constants. This follows what forwprop does.\n\nBootstrap and regtest ongoing on x86_64-unknown-linux-gnu, will\npush if that succeeds.\n\nRichard.\n\n\tPR tree-optimization/124692\n\t* tree-cfg.cc (replace_uses_by): Call update_stmt after\n\tsubstitution and before folding.\n\n\t* gcc.dg/torture/pr124692.c: New testcase.\n---\n gcc/testsuite/gcc.dg/torture/pr124692.c | 22 ++++++++++++++++++++++\n gcc/tree-cfg.cc | 8 +++++---\n 2 files changed, 27 insertions(+), 3 deletions(-)\n create mode 100644 gcc/testsuite/gcc.dg/torture/pr124692.c", "diff": "diff --git a/gcc/testsuite/gcc.dg/torture/pr124692.c b/gcc/testsuite/gcc.dg/torture/pr124692.c\nnew file mode 100644\nindex 00000000000..340f7ea02d1\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/torture/pr124692.c\n@@ -0,0 +1,22 @@\n+/* { dg-do compile } */\n+\n+int a, b, d, e[3][1], f, g, h;\n+unsigned c;\n+int main()\n+{\n+ while (b)\n+ {\n+ h = g;\n+ for (b = 0; b < 2; b++)\n+\t;\n+ for (; c; c++)\n+\t{\n+\t int j = e[b][h];\n+\t f = a < 0 ? j : j - a;\n+\t if (!f)\n+\t break;\n+\t g = c;\n+\t}\n+ }\n+ return 0;\n+}\ndiff --git a/gcc/tree-cfg.cc b/gcc/tree-cfg.cc\nindex 66ea54f8b85..3b95e0a68f1 100644\n--- a/gcc/tree-cfg.cc\n+++ b/gcc/tree-cfg.cc\n@@ -1988,14 +1988,16 @@ replace_uses_by (tree name, tree val)\n \t\tif (op && TREE_CODE (op) == ADDR_EXPR)\n \t\t recompute_tree_invariant_for_addr_expr (op);\n \t }\n+\t update_stmt (stmt);\n \n \t if (fold_stmt (&gsi))\n-\t stmt = gsi_stmt (gsi);\n+\t {\n+\t stmt = gsi_stmt (gsi);\n+\t update_stmt (stmt);\n+\t }\n \n \t if (maybe_clean_or_replace_eh_stmt (orig_stmt, stmt))\n \t gimple_purge_dead_eh_edges (gimple_bb (stmt));\n-\n-\t update_stmt (stmt);\n \t}\n }\n \n", "prefixes": [] }