[{"id":3684474,"web_url":"http://patchwork.ozlabs.org/comment/3684474/","msgid":"","list_archive_url":null,"date":"2026-04-30T06:47:10","subject":"Re: [PATCH] x86_cse: Convert CONST_VECTOR load to constant integer\n load","submitter":{"id":808,"url":"http://patchwork.ozlabs.org/api/people/808/","name":"Uros Bizjak","email":"ubizjak@gmail.com"},"content":"On Thu, Apr 30, 2026 at 12:30 AM H.J. Lu wrote:\n>\n> Convert CONST_VECTOR load no larger than integer register:\n>\n> (set (reg:V2SI 106)\n> (const_vector:V2SI [(const_int 1 [1]) repeated x2]))\n>\n> to constant integer load:\n>\n> (set (subreg:DI (reg:V2SI 106 [ _20 ]) 0)\n> (const_int 4294967297 [0x100000001]))\n>\n> and keep redundant constant integer load. Generate zero CONST_VECTOR\n> load which works for both MMX and XMM registers.\n>\n> gcc/\n>\n> PR target/125026\n> PR target/125032\n> * config/i386/i386-features.cc (ix86_place_single_vector_set):\n> Don't check CONST_VECTOR load size.\n> (replace_vector_const): Handle constant integer load.\n> (x86_cse::x86_cse): Convert CONST_VECTOR load no larger than\n> integer to constant integer load and keep redundant constant\n> integer load. Generate zero CONST_VECTOR load.\n>\n> Tested on Linux/x86-64 and Linux/i686.\n>\n> gcc/testsuite/\n>\n> PR target/125026\n> PR target/125032\n> * gcc.target/i386/pr125026.c: New test.\n> * gcc.target/i386/pr125032-1.c: Likewise.\n> * gcc.target/i386/pr125032-2.c: Likewise.\n\nLGTM, but I’d prefer Hongtao to give the final approval for the vector\nrelated changes.\n\nThanks,\nUros.\n\n>\n>\n> --\n> H.J.","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\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=WgDx1v6p;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=WgDx1v6p","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","sourceware.org; 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Wed, 29 Apr 2026\n 23:47:22 -0700 (PDT)","MIME-Version":"1.0","References":"\n ","In-Reply-To":"\n ","From":"Uros Bizjak ","Date":"Thu, 30 Apr 2026 08:47:10 +0200","X-Gm-Features":"AVHnY4L_HcAMO5SMTZbBz_j-kWWq0llS6g1E3xCtbDsVZvRhV3Twa9Xkd5arn1M","Message-ID":"\n ","Subject":"Re: [PATCH] x86_cse: Convert CONST_VECTOR load to constant integer\n load","To":"\"H.J. Lu\" ","Cc":"GCC Patches , Hongtao Liu ","Content-Type":"text/plain; charset=\"UTF-8\"","Content-Transfer-Encoding":"quoted-printable","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 ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}},{"id":3684511,"web_url":"http://patchwork.ozlabs.org/comment/3684511/","msgid":"","list_archive_url":null,"date":"2026-04-30T07:58:09","subject":"Re: [PATCH] x86_cse: Convert CONST_VECTOR load to constant integer\n load","submitter":{"id":75791,"url":"http://patchwork.ozlabs.org/api/people/75791/","name":"Hongtao Liu","email":"crazylht@gmail.com"},"content":"On Thu, Apr 30, 2026 at 2:47 PM Uros Bizjak wrote:\n>\n> On Thu, Apr 30, 2026 at 12:30 AM H.J. Lu wrote:\n> >\n> > Convert CONST_VECTOR load no larger than integer register:\n> >\n> > (set (reg:V2SI 106)\n> > (const_vector:V2SI [(const_int 1 [1]) repeated x2]))\n> >\n> > to constant integer load:\n> >\n> > (set (subreg:DI (reg:V2SI 106 [ _20 ]) 0)\n> > (const_int 4294967297 [0x100000001]))\n> >\n> > and keep redundant constant integer load. Generate zero CONST_VECTOR\n> > load which works for both MMX and XMM registers.\n> >\n> > gcc/\n> >\n> > PR target/125026\n> > PR target/125032\n> > * config/i386/i386-features.cc (ix86_place_single_vector_set):\n> > Don't check CONST_VECTOR load size.\n> > (replace_vector_const): Handle constant integer load.\n> > (x86_cse::x86_cse): Convert CONST_VECTOR load no larger than\n> > integer to constant integer load and keep redundant constant\n> > integer load. Generate zero CONST_VECTOR load.\n> >\n> > Tested on Linux/x86-64 and Linux/i686.\n> >\n> > gcc/testsuite/\n> >\n> > PR target/125026\n> > PR target/125032\n> > * gcc.target/i386/pr125026.c: New test.\n> > * gcc.target/i386/pr125032-1.c: Likewise.\n> > * gcc.target/i386/pr125032-2.c: Likewise.\n>\n> LGTM, but I’d prefer Hongtao to give the final approval for the vector\n> related changes.\nLGTM.\n>\n> Thanks,\n> Uros.\n>\n> >\n> >\n> > --\n> > H.J.","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\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=AfRwKNWb;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)","sourceware.org;\n\tdkim=pass (2048-bit key,\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=AfRwKNWb","sourceware.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","sourceware.org; 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Thu, 30 Apr 2026\n 00:58:22 -0700 (PDT)","MIME-Version":"1.0","References":"\n \n ","In-Reply-To":"\n ","From":"Hongtao Liu ","Date":"Thu, 30 Apr 2026 15:58:09 +0800","X-Gm-Features":"AVHnY4Kqf25yhAsM8qNfVGbpg0IFb5YtI5hBFG2svCqn07WNVXiWajUdUCLTfFQ","Message-ID":"\n ","Subject":"Re: [PATCH] x86_cse: Convert CONST_VECTOR load to constant integer\n load","To":"Uros Bizjak ","Cc":"\"H.J. Lu\" , GCC Patches ,\n Hongtao Liu ","Content-Type":"text/plain; charset=\"UTF-8\"","Content-Transfer-Encoding":"quoted-printable","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 ","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"}}]