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{ "id": 2224481, "url": "http://patchwork.ozlabs.org/api/patches/2224481/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260417130051.3717561-1-daniel.barboza@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": "<20260417130051.3717561-1-daniel.barboza@oss.qualcomm.com>", "list_archive_url": null, "date": "2026-04-17T13:00:51", "name": "[v3] match.pd: (A>>bool) == 0 -> (unsigned)A) <= bool [PR119420]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ddd1031bb5b64c5d6fc94c841ae4925916fe2c36", "submitter": { "id": 92288, "url": "http://patchwork.ozlabs.org/api/people/92288/?format=api", "name": "Daniel Henrique Barboza", "email": "daniel.barboza@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260417130051.3717561-1-daniel.barboza@oss.qualcomm.com/mbox/", "series": [ { "id": 500333, "url": "http://patchwork.ozlabs.org/api/series/500333/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500333", "date": "2026-04-17T13:00:51", "name": "[v3] match.pd: (A>>bool) == 0 -> (unsigned)A) <= bool [PR119420]", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/500333/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224481/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224481/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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<daniel.barboza@oss.qualcomm.com>", "To": "gcc-patches@gcc.gnu.org", "Cc": "jeffrey.law@oss.qualcomm.com, andrew.pinski@oss.qualcomm.com,\n Daniel Barboza <daniel.barboza@oss.qualcomm.com>", "Subject": "[PATCH v3] match.pd: (A>>bool) == 0 -> (unsigned)A) <= bool\n [PR119420]", "Date": "Fri, 17 Apr 2026 10:00:51 -0300", "Message-ID": "<20260417130051.3717561-1-daniel.barboza@oss.qualcomm.com>", "X-Mailer": "git-send-email 2.43.0", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDE3MDEzMCBTYWx0ZWRfX4LUuvctQT29y\n kWuGFwwIl0tDx/tZVHX70b1EnY+CCYPsfRRAb2nrCnQkfyXshq42qUV2ARstBBJx+RYWNat/sKV\n Wm+AEZEu80sqAjKyGsTqVF4iXWmJ2f1IK7eixYjfRx519bu2lcnD7rWR6Tmw/BZO3CP2LJpoJ0i\n H5viyzcJ2XZyzT7dFRNwl5EBrpzZJVwErN5EGLOJMbuEo+EIZvigpBlsbu+zMkLQzO7e3Ih3SPN\n 3c/wPorK8+ZgrOYE8Xou7ihFXxDaGnPXflnPimMRcDGvJ72RAKccffhJvTsDv3LFG87tuPR8T0y\n mrjPNgv5YD3PB5pZA/YpHoW4lN3Lhk/TXUHDVxWSvibaOr75OToM4hlNicrrK4cxc2qHLAx1giH\n 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authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604170130", "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": "From: Daniel Barboza <daniel.barboza@oss.qualcomm.com>\n\nAlso add its counterpart:\n\n\"(A>>bool) != 0 -> (unsigned)A) > bool\"\n\nBootstrap tested in x86, aarch64 and RISC-V.\nRegression tested in x86 and aarch64.\n\n PR tree-optimization/119420\n\ngcc/ChangeLog:\n\n\t* match.pd(`(A>>bool) EQ 0 -> (unsigned)A) LE bool`): New\n\tpattern.\n\ngcc/testsuite/ChangeLog:\n\n * gcc.dg/tree-ssa/pr119420.c: New test.\n---\n\nChanges from v2:\n- gate the pattern with \"#if GIMPLE\"\n- use 'single_use' in the rshift result\n- add the NE variant\n- v2 link: https://gcc.gnu.org/pipermail/gcc-patches/2026-April/712431.html\n\n gcc/match.pd | 13 ++++++++\n gcc/testsuite/gcc.dg/tree-ssa/pr119420.c | 42 ++++++++++++++++++++++++\n 2 files changed, 55 insertions(+)\n create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/pr119420.c", "diff": "diff --git a/gcc/match.pd b/gcc/match.pd\nindex 7b652afb43d..fab1da673d1 100644\n--- a/gcc/match.pd\n+++ b/gcc/match.pd\n@@ -5367,6 +5367,19 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)\n @0)))))\n #endif\n \n+#if GIMPLE\n+/* PR119420: (A >> bool) == 0 -> (unsigned)a <= (unsigned)bool\n+ and its variant:\n+ (A >> bool) != 0 -> (unsigned)a > (unsigned)bool; */\n+(for cmp (eq ne)\n+ icmp (le gt)\n+ (simplify\n+ (cmp (rshift@2 @0 zero_one_valued_p@1) integer_zerop)\n+ (if (single_use (@2))\n+ (with { tree utype = unsigned_type_for (TREE_TYPE (@0)); }\n+ (icmp (convert:utype @0) (convert:utype @1))))))\n+#endif\n+\n /* Rewrite an LROTATE_EXPR by a constant into an\n RROTATE_EXPR by a new constant. */\n (simplify\ndiff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr119420.c b/gcc/testsuite/gcc.dg/tree-ssa/pr119420.c\nnew file mode 100644\nindex 00000000000..99259fd4a8b\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr119420.c\n@@ -0,0 +1,42 @@\n+/* { dg-additional-options -O2 } */\n+/* { dg-additional-options -fdump-tree-optimized } */\n+\n+int ll (signed a)\n+{\n+ int d = a >> 1;\n+ return d == 0;\n+}\n+\n+int ll1 (signed a)\n+{\n+ int d = a & ~1;\n+ return d == 0;\n+}\n+\n+int ll2 (signed a)\n+{\n+ unsigned aa = a;\n+ return aa <= 1;\n+}\n+\n+int ll3 (signed a)\n+{\n+ int d = a >> 1;\n+ return d != 0;\n+}\n+\n+int ll4 (signed a)\n+{\n+ int d = a & ~1;\n+ return d != 0;\n+}\n+\n+int ll5 (signed a)\n+{\n+ unsigned aa = a;\n+ return aa > 1;\n+}\n+\n+/* { dg-final { scan-tree-dump-times \" >> \" 0 optimized } } */\n+/* { dg-final { scan-tree-dump-times \" <= \" 3 optimized } } */\n+/* { dg-final { scan-tree-dump-times \" > \" 3 optimized } } */\n", "prefixes": [ "v3" ] }