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GET /api/1.1/patches/2228337/?format=api
{ "id": 2228337, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2228337/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260426061356.581852-1-andrew.pinski@oss.qualcomm.com/", "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": "<20260426061356.581852-1-andrew.pinski@oss.qualcomm.com>", "date": "2026-04-26T06:13:56", "name": "match: Optimize `signed < 0 ? positive : min<signed, positive>` into `(signed)min<(unsigned), (unsigned)positive>` [PR110262]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "45597864338d81d321f6b8378b3f79dd10859ee2", "submitter": { "id": 91428, "url": "http://patchwork.ozlabs.org/api/1.1/people/91428/?format=api", "name": "Andrew Pinski", "email": "andrew.pinski@oss.qualcomm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260426061356.581852-1-andrew.pinski@oss.qualcomm.com/mbox/", "series": [ { "id": 501503, "url": "http://patchwork.ozlabs.org/api/1.1/series/501503/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501503", "date": "2026-04-26T06:13:56", "name": "match: Optimize `signed < 0 ? positive : min<signed, positive>` into `(signed)min<(unsigned), (unsigned)positive>` [PR110262]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501503/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2228337/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2228337/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 (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=dBzpjci2;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=Umqg1fhs;\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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I only realized today\nI could generalize it to handle more than just 1 to all positive\nvalues.\nThis adds the pattern to optimize:\nsigned < 0 ? positive : min<signed, positive>\ninto:\nunsigned ts = signed;\nunsigned ps = positive;\nunsigned ru = min<ts, tp>;\n(signed)ru\n\nBootstrapped and tested on x86_64-linux-gnu.\n\n\tPR tree-optimization/110262\n\ngcc/ChangeLog:\n\n\t* match.pd (`signed < 0 ? positive : min<signed, positive>`): New\n\tpattern.\n\ngcc/testsuite/ChangeLog:\n\n\t* gcc.dg/pr110262-1.c: New test.\n\t* gcc.dg/tree-ssa/phi-opt-46.c: New test.\n\t* gcc.dg/tree-ssa/phi-opt-47.c: New test.\n\nSigned-off-by: Andrew Pinski <andrew.pinski@oss.qualcomm.com>\n---\n gcc/match.pd | 11 ++++++++++\n gcc/testsuite/gcc.dg/pr110262-1.c | 12 +++++++++++\n gcc/testsuite/gcc.dg/tree-ssa/phi-opt-46.c | 15 ++++++++++++++\n gcc/testsuite/gcc.dg/tree-ssa/phi-opt-47.c | 24 ++++++++++++++++++++++\n 4 files changed, 62 insertions(+)\n create mode 100644 gcc/testsuite/gcc.dg/pr110262-1.c\n create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/phi-opt-46.c\n create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/phi-opt-47.c", "diff": "diff --git a/gcc/match.pd b/gcc/match.pd\nindex 94f69185adf..f1be45b1993 100644\n--- a/gcc/match.pd\n+++ b/gcc/match.pd\n@@ -7109,6 +7109,17 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)\n \t\t TYPE_SIGN (type)))\n (max @2 @4)))))))\n \n+/* Optimize signed < 0 ? positive : MIN<signed, positive> to\n+ MIN<(unsigned)signed, (unsigned)positive>. */\n+(simplify\n+ (cond (lt @0 integer_zerop)\n+ tree_expr_nonnegative_p@1\n+ (min:c @0 @1))\n+ (if (INTEGRAL_TYPE_P (type)\n+ && !TYPE_UNSIGNED (type))\n+ (with { tree utype = unsigned_type_for (type); }\n+ (convert (min (convert:utype @0) (convert:utype @1))))))\n+\n #if GIMPLE\n /* These patterns should be after min/max detection as simplifications\n of `(type)(zero_one ==/!= 0)` to `(type)(zero_one)`\ndiff --git a/gcc/testsuite/gcc.dg/pr110262-1.c b/gcc/testsuite/gcc.dg/pr110262-1.c\nnew file mode 100644\nindex 00000000000..61cc079710a\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/pr110262-1.c\n@@ -0,0 +1,12 @@\n+/* PR tree-optimization/110262 */\n+/* { dg-do compile } */\n+/* { dg-options \"-O1 -fdump-tree-gimple\" } */\n+\n+int g(int min_need_stall)\n+{\n+ return min_need_stall < 0 ? 1 : ((min_need_stall) < (1) ? (min_need_stall) : (1));\n+}\n+\n+/* { dg-final { scan-tree-dump \"MIN_EXPR <\" \"gimple\" } } */\n+/* { dg-final { scan-tree-dump-not \"if \" \"gimple\" } } */\n+\ndiff --git a/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-46.c b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-46.c\nnew file mode 100644\nindex 00000000000..a86aa168d39\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-46.c\n@@ -0,0 +1,15 @@\n+/* PR tree-optimization/110262 */\n+/* { dg-do compile } */\n+/* { dg-options \"-O1 -fdump-tree-phiopt2\" } */\n+\n+int g(int min_need_stall)\n+{\n+ int t = ((min_need_stall) < (1) ? (min_need_stall) : (1));\n+ return min_need_stall < 0 ? 1 : t;\n+}\n+\n+/* This should be converted into (int)MIN<(unsigned)min_need_stall, 1u> */\n+\n+/* { dg-final { scan-tree-dump \"MIN_EXPR <\" \"phiopt2\" } } */\n+/* { dg-final { scan-tree-dump-not \"if \" \"phiopt2\" } } */\n+\ndiff --git a/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-47.c b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-47.c\nnew file mode 100644\nindex 00000000000..c42e5dd046f\n--- /dev/null\n+++ b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-47.c\n@@ -0,0 +1,24 @@\n+/* PR tree-optimization/110262 */\n+/* { dg-do compile } */\n+/* { dg-options \"-O1 -fdump-tree-phiopt2\" } */\n+int g(int a, int b)\n+{\n+ b = b < 0 ? 0 : b;\n+ int t = ((a) < (b) ? (a) : (b));\n+ return a < 0 ? b : t;\n+}\n+\n+int g1(int a, int b, unsigned short c)\n+{\n+ b = c;\n+ int t = ((a) < (b) ? (a) : (b));\n+ return a < 0 ? b : t;\n+}\n+\n+/* Both of the last statement of these functions should be converted into:\n+ (int)MIN<(unsigned)a, (unsigned)b>. */\n+\n+/* { dg-final { scan-tree-dump \"MIN_EXPR <\" \"phiopt2\" } } */\n+/* { dg-final { scan-tree-dump-not \"if \" \"phiopt2\" } } */\n+/* { dg-final { scan-tree-dump-times \"Removing basic block\" 2 \"phiopt2\" } } */\n+\n", "prefixes": [] }