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{ "id": 2235279, "url": "http://patchwork.ozlabs.org/api/patches/2235279/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260509010145.3856073-1-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": "<20260509010145.3856073-1-andrew.pinski@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-05-09T01:01:45", "name": "[PUSHED] match: Fix merged patterns for a!=b implies a and b are not zero [PR125234]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ff20ca2ab4d241177e0c8c6bbf868f4636afea4b", "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/20260509010145.3856073-1-andrew.pinski@oss.qualcomm.com/mbox/", "series": [ { "id": 503470, "url": "http://patchwork.ozlabs.org/api/series/503470/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=503470", "date": "2026-05-09T01:01:45", "name": "[PUSHED] match: Fix merged patterns for a!=b implies a and b are not zero [PR125234]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/503470/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2235279/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2235279/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", 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"Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "In r17-231-gc65691bc5a2873, I messed up the resulting constant for\n`(a != b) & ((a | b) == 0)` and `(a == b) | ((a | b) != 0)`. I had\nswapped which one was resulting in true/false. This fixes the issue\nand adds a testcase to make sure it does not regress again.\n\nPushed as obvious after a bootstrap/test on x86_64-linux-gnu.\n\n\tPR tree-optimization/125234\n\ngcc/ChangeLog:\n\n\t* match.pd (`(a !=/== b) &\\| ((a|b) ==/!= 0)`): Fix\n\tresulting constant form.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.dg/torture/pr125234-1.c: New test.\n\nSigned-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n---\n gcc/match.pd | 2 +-\n gcc/testsuite/gcc.dg/torture/pr125234-1.c | 49 +++++++++++++++++++++++\n 2 files changed, 50 insertions(+), 1 deletion(-)\n create mode 100644 gcc/testsuite/gcc.dg/torture/pr125234-1.c", "diff": "diff --git a/gcc/match.pd b/gcc/match.pd\nindex 494e26a7d49..198e2e7202e 100644\n--- a/gcc/match.pd\n+++ b/gcc/match.pd\n@@ -7197,7 +7197,7 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)\n neeqr (eq ne)\n (simplify\n (bitop (neeql @0 @1) (neeqr (bit_ior @0 @1) integer_zerop))\n- { constant_boolean_node (bitop==BIT_AND_EXPR, type); }))\n+ { constant_boolean_node (bitop == BIT_IOR_EXPR, type); }))\n #endif\n \n /* These was part of minmax phiopt. */\ndiff --git a/gcc/testsuite/gcc.dg/torture/pr125234-1.c b/gcc/testsuite/gcc.dg/torture/pr125234-1.c\nnew file mode 100644\nindex 00000000000..70854ea8c72\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/torture/pr125234-1.c\n@@ -0,0 +1,49 @@\n+/* PR tree-optimization/125234 */\n+/* { dg-do run } */\n+\n+__attribute__((noinline))\n+int f0(int a, int b)\n+{\n+ return (a != b) & ((a | b) == 0);\n+}\n+\n+__attribute__((noinline))\n+int f1(int a, int b)\n+{\n+ return (a == b) | ((a | b) != 0);\n+}\n+\n+\n+__attribute__((noinline))\n+int f0_(int a, int b)\n+{\n+ if (a != b)\n+ if ((a | b) == 0)\n+ return 1;\n+ return 0;\n+}\n+\n+__attribute__((noinline))\n+int f1_(int a, int b)\n+{\n+ if (a == b)\n+ return 1;\n+ if ((a | b) != 0)\n+ return 1;\n+ return 0;\n+}\n+\n+\n+int\n+main()\n+{\n+ if (f0(0, 0))\n+ __builtin_abort ();\n+ if (!f1(0, 0))\n+ __builtin_abort ();\n+ if (f0_(0, 0))\n+ __builtin_abort ();\n+ if (!f1_(0, 0))\n+ __builtin_abort ();\n+}\n+\n", "prefixes": [ "PUSHED" ] }