{"id":2226329,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2226329/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubwh7m90.gcc.gcc-TEST.pinskia.33.1.4@forge-stage.sourceware.org/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/1.2/projects/17/?format=json","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":"","list_archive_url":null,"date":"2026-04-22T10:49:13","name":"[v1,04/15] simplify-rtx: Simplify `(zero_extend (and x CST))` -> (and (subreg x) CST)","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"2aea2bf0a93fa942048f2b302f342624b4d37766","submitter":{"id":93219,"url":"http://patchwork.ozlabs.org/api/1.2/people/93219/?format=json","name":"Andrew Pinski via Sourceware Forge","email":"forge-bot+pinskia@forge-stage.sourceware.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubwh7m90.gcc.gcc-TEST.pinskia.33.1.4@forge-stage.sourceware.org/mbox/","series":[{"id":500990,"url":"http://patchwork.ozlabs.org/api/1.2/series/500990/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=500990","date":"2026-04-22T10:49:12","name":"copy-prop-arg","version":1,"mbox":"http://patchwork.ozlabs.org/series/500990/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226329/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226329/checks/","tags":{},"related":[],"headers":{"Return-Path":"","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 spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; 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server2.sourceware.org","From":"Andrew Pinski via Sourceware Forge\n ","Date":"Wed, 22 Apr 2026 10:49:13 +0000","Subject":"[PATCH v1 04/15] simplify-rtx: Simplify `(zero_extend (and x CST))`\n -> (and (subreg x) CST)","To":"gcc-patches mailing list ","Message-ID":"\n ","X-Mailer":"batrachomyomachia","X-Pull-Request-Organization":"gcc","X-Pull-Request-Repository":"gcc-TEST","X-Pull-Request":"https://forge.sourceware.org/gcc/gcc-TEST/pulls/33","References":"\n ","In-Reply-To":"\n ","X-Patch-URL":"\n https://forge.sourceware.org/pinskia/gcc-TEST/commit/d0add310664b083c38b4f8fe557b3456ea380f89","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Reply-To":"gcc-patches mailing list ,\n pinskia@gcc.gnu.org","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"From: Andrew Pinski \n\nThis adds the simplification of a ZERO_EXTEND of an AND. This optimization\nwas already handled in combine via combine_simplify_rtx and the handling\nthere of compound_operations (ZERO_EXTRACT).\n\ngcc/ChangeLog:\n\n\t* simplify-rtx.cc (simplify_context::simplify_unary_operation_1) :\n\tAdd simplifcation for and with a constant.\n\nSigned-off-by: Andrew Pinski \n---\n gcc/simplify-rtx.cc | 11 +++++++++++\n 1 file changed, 11 insertions(+)","diff":"diff --git a/gcc/simplify-rtx.cc b/gcc/simplify-rtx.cc\nindex c478bd060fc6..f4e03cd45e81 100644\n--- a/gcc/simplify-rtx.cc\n+++ b/gcc/simplify-rtx.cc\n@@ -1709,6 +1709,17 @@ simplify_context::simplify_unary_operation_1 (rtx_code code, machine_mode mode,\n if (GET_MODE (op) == mode)\n \treturn op;\n \n+ /* (zero_extend:SI (and:QI X (const))) -> (and:SI (lowpart:SI X) const)\n+\t where const does not sign bit set. */\n+ if (GET_CODE (op) == AND\n+\t && CONST_INT_P (XEXP (op, 1))\n+\t && INTVAL (XEXP (op, 1)) > 0)\n+\t{\n+\t rtx tem = rtl_hooks.gen_lowpart_no_emit (mode, XEXP (op, 0));\n+\t if (tem)\n+\t return simplify_gen_binary (AND, mode, tem, XEXP (op, 1));\n+\t}\n+\n /* Check for a zero extension of a subreg of a promoted\n \t variable, where the promotion is zero-extended, and the\n \t target mode is the same as the variable's promotion. */\n","prefixes":["v1","04/15"]}