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GET /api/patches/2224159/?format=api
{ "id": 2224159, "url": "http://patchwork.ozlabs.org/api/patches/2224159/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260417020830.4154676-1-andrew.pinski@oss.qualcomm.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": "<20260417020830.4154676-1-andrew.pinski@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-04-17T02:08:29", "name": "[GCC17-PATCH,1/2] phiopt: Set cfgchanged if cselim-limited happened", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "308d21dc122aa81fdc79fc3a8c90ffd817d169ec", "submitter": { "id": 91428, "url": "http://patchwork.ozlabs.org/api/people/91428/?format=api", "name": "Andrew Pinski", "email": "andrew.pinski@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260417020830.4154676-1-andrew.pinski@oss.qualcomm.com/mbox/", "series": [ { "id": 500220, "url": "http://patchwork.ozlabs.org/api/series/500220/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500220", "date": "2026-04-17T02:08:29", "name": "[GCC17-PATCH,1/2] phiopt: Set cfgchanged if cselim-limited happened", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500220/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224159/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224159/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", 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"gcc-patches@gcc.gnu.org", "Cc": "Andrew Pinski <andrew.pinski@oss.qualcomm.com>", "Subject": "[GCC17-PATCH 1/2] phiopt: Set cfgchanged if cselim-limited happened", "Date": "Thu, 16 Apr 2026 19:08:29 -0700", "Message-ID": "<20260417020830.4154676-1-andrew.pinski@oss.qualcomm.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Authority-Analysis": "v=2.4 cv=JcqMa0KV c=1 sm=1 tr=0 ts=69e19623 cx=c_pps\n a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=V8mNeic1A8NdUVuT7JxKYQ==:17\n a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8\n a=-K5LXLgR9n4a0V7_c4MA:9 a=uKXjsCUrEbL0IQVhDsJ9:22", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDE3MDAxOSBTYWx0ZWRfX4vHMslQjpLkG\n MFVcSHAKl3ebDliP47jf/8hrq0oaafUXATrO/Tgbol1m5IOr8NRTclLTUooOPhXDrQ8q/y/41Vw\n GdqRlHJogChUusM1/OQVo+H5baAerZvdHjm8x0HTpWr8Deau9tWIyR3vZK8W20Vr9kfWx708E/m\n PQje99/9HGGtOH8fEj5roc9tfz+r8iCzYt+fZbKOnv98WUfwqx6vbjycydveDYC6oW4U/19uSsq\n enaJkrINA2AwIVxvZO+FrmVDl78Gf1Ghcx/tp4h4Mpy+yKYJqSxCEWDF9uCuMj82w4my1sSWhyG\n sHhEXhez2BZeo7YXlpwwMymgJIrL/pCg96G6CEsdYBqptCCY1E2EPWMCOTtPfNE0UdM4Hl8+G98\n 5OobFKW/vCI4fXY+GrAqHNDR1rd3M6rzjahGwJH2YpvR3I7uRs2HcFaHE9KAbXO6rPl4lv5PHmf\n 7l7emAwAMNfP0iS9G+w==", "X-Proofpoint-GUID": "0g2axLQSZqz-n4msgbQOLTNMk0r-DYiK", "X-Proofpoint-ORIG-GUID": "0g2axLQSZqz-n4msgbQOLTNMk0r-DYiK", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-16_04,2026-04-16_03,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n spamscore=0 adultscore=0 clxscore=1015 malwarescore=0 phishscore=0\n suspectscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0\n bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound\n adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000\n definitions=main-2604170019", "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": "I noticed while improving cselim-limited that if\nnot creating a new phi, there are a few empty basic blocks.\nSo this sets cfgcleanup when cselim-limited does\nsomething in phiopt. cselim-5.c shows the case I\nwas looking into.\n\ngcc/ChangeLog:\n\n\t* tree-ssa-phiopt.cc (pass_phiopt::execute): Set cfgcleanup\n\tif cselim_limited returns true.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.dg/tree-ssa/cselim-5.c: New test.\n\nSigned-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n---\n gcc/testsuite/gcc.dg/tree-ssa/cselim-5.c | 16 ++++++++++++++++\n gcc/tree-ssa-phiopt.cc | 5 +++--\n 2 files changed, 19 insertions(+), 2 deletions(-)\n create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/cselim-5.c", "diff": "diff --git a/gcc/testsuite/gcc.dg/tree-ssa/cselim-5.c b/gcc/testsuite/gcc.dg/tree-ssa/cselim-5.c\nnew file mode 100644\nindex 00000000000..8d1335f174a\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/cselim-5.c\n@@ -0,0 +1,16 @@\n+/* { dg-do compile } */\n+/* { dg-options \"-O1 -fdump-tree-phiopt1\" } */\n+\n+int t;\n+void f(int a, int b, int c, int d)\n+{\n+ if (b)\n+ t = 0;\n+ else\n+ t = 0;\n+}\n+\n+/* We should sink/merge the stores and end up with a single BB. */\n+\n+/* { dg-final { scan-tree-dump-times \"t = 0;\" 1 \"phiopt1\" } } */\n+/* { dg-final { scan-tree-dump-times \"<bb \" 1 \"phiopt1\" } } */\ndiff --git a/gcc/tree-ssa-phiopt.cc b/gcc/tree-ssa-phiopt.cc\nindex 0bf7e58b8f0..324559e6a7d 100644\n--- a/gcc/tree-ssa-phiopt.cc\n+++ b/gcc/tree-ssa-phiopt.cc\n@@ -4048,10 +4048,11 @@ pass_phiopt::execute (function *)\n \t hoist_adjacent_loads (bb, bb1, bb2, bb3);\n \n \t /* Try to see if there are only store in each side of the if\n-\t and try to remove that; don't do this for -Og. */\n+\t and try to remove that; don't do this for -Og.\n+\t With sinking the stores we might end up with empty blocks. */\n \t if (EDGE_COUNT (bb3->preds) == 2 && !optimize_debug)\n \t while (cond_if_else_store_replacement_limited (bb1, bb2, bb3))\n-\t ;\n+\t cfgchanged = true;\n \t}\n \n gimple_stmt_iterator gsi;\n", "prefixes": [ "GCC17-PATCH", "1/2" ] }