[{"id":3678818,"web_url":"http://patchwork.ozlabs.org/comment/3678818/","msgid":"","list_archive_url":null,"date":"2026-04-17T15:54:06","subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","submitter":{"id":81970,"url":"http://patchwork.ozlabs.org/api/people/81970/","name":"Christophe Lyon","email":"christophe.lyon.oss@gmail.com"},"content":"On Fri, Apr 17, 2026 at 5:20 PM Richard Earnshaw wrote:\n\n> On targets that use short enums, this test produces different output\n> since the fold optimization does not apply to sizes smaller than a word.\n>\n> Adjust the expected results until such time as this optimization can\n> be expanded to support shorter input values.\n>\n> gcc/testsuite/ChangeLog:\n>\n> PR tree-optimization/124909\n>\n> * gcc.dg/match-shift-cmp-3.c: Adjust expected results for\n> target short_enums.\n>\n\n Is this related to PR124633 ?\n\nThanks,\n\nChristophe\n\n---\n> gcc/testsuite/gcc.dg/match-shift-cmp-3.c | 6 ++++--\n> 1 file changed, 4 insertions(+), 2 deletions(-)\n>\n> diff --git a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> index e46ac30b905..5278b376717 100644\n> --- a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> +++ b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> @@ -39,5 +39,7 @@ TEST_OP_CST (ne, !=, -2)\n> TEST_OP (eq, ==)\n> TEST_OP (ne, !=)\n>\n> -/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized } } */\n> -/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized { target { !\n> short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized { target { !\n> short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 4 optimized { target {\n> short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 4 optimized { target {\n> short_enums } } } } */\n> --\n> 2.43.0\n>\n>","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=Bt/pMpka;\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; 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Fri, 17 Apr 2026\n 08:54:21 -0700 (PDT)","MIME-Version":"1.0","References":"<20260417152009.3074337-1-rearnsha@arm.com>","In-Reply-To":"<20260417152009.3074337-1-rearnsha@arm.com>","From":"Christophe Lyon ","Date":"Fri, 17 Apr 2026 17:54:06 +0200","X-Gm-Features":"AQROBzBgvx5WP_H2UawBwcu_C8n7a5YT77Qg7pURut3VAa8ES6aLph661RmJRHo","Message-ID":"\n ","Subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","To":"Richard Earnshaw ","Cc":"gcc-patches@gcc.gnu.org, dhruvc@nvidia.com, rguenther@suse.de,\n\t=?utf-8?q?Torbj=C3=B6rn_SVENSSON?= ","Content-Type":"multipart/alternative; boundary=\"0000000000005f8a70064fa9f651\"","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":3678822,"web_url":"http://patchwork.ozlabs.org/comment/3678822/","msgid":"<667aeb85-a168-43b1-8d28-b0e5609d5b29@arm.com>","list_archive_url":null,"date":"2026-04-17T16:04:37","subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","submitter":{"id":67887,"url":"http://patchwork.ozlabs.org/api/people/67887/","name":"Richard Earnshaw","email":"Richard.Earnshaw@arm.com"},"content":"On 17/04/2026 16:54, Christophe Lyon wrote:\n> \n> \n> On Fri, Apr 17, 2026 at 5:20 PM Richard Earnshaw > wrote:\n> \n> On targets that use short enums, this test produces different output\n> since the fold optimization does not apply to sizes smaller than a word.\n> \n> Adjust the expected results until such time as this optimization can\n> be expanded to support shorter input values.\n> \n> gcc/testsuite/ChangeLog:\n> \n>         PR tree-optimization/124909\n> \n>         * gcc.dg/match-shift-cmp-3.c:  Adjust expected results for\n>         target short_enums.\n> \n> \n>  Is this related to PR124633 ?\n> \n\nYes, I've linked that to my PR as I've more detail in there.\n\nR.\n\n> Thanks,\n> \n> Christophe\n> \n> ---\n>  gcc/testsuite/gcc.dg/match-shift-cmp-3.c | 6 ++++--\n>  1 file changed, 4 insertions(+), 2 deletions(-)\n> \n> diff --git a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> index e46ac30b905..5278b376717 100644\n> --- a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> +++ b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> @@ -39,5 +39,7 @@ TEST_OP_CST (ne, !=, -2)\n>  TEST_OP (eq, ==)\n>  TEST_OP (ne, !=)\n> \n> -/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized } } */\n> -/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized { target { ! short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized { target { ! short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 4 optimized { target { short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 4 optimized { target { short_enums } } } } */\n> -- \n> 2.43.0\n>","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=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=a1C+34HP;\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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charset=UTF-8","Content-Transfer-Encoding":"8bit","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":3678832,"web_url":"http://patchwork.ozlabs.org/comment/3678832/","msgid":"<40278989-9166-4e0e-abbe-f8efc8fce897@foss.st.com>","list_archive_url":null,"date":"2026-04-17T16:21:52","subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","submitter":{"id":84848,"url":"http://patchwork.ozlabs.org/api/people/84848/","name":"Torbjörn SVENSSON","email":"torbjorn.svensson@foss.st.com"},"content":"On 2026-04-17 18:04, Richard Earnshaw (foss) wrote:\n> On 17/04/2026 16:54, Christophe Lyon wrote:\n>>\n>>\n>> On Fri, Apr 17, 2026 at 5:20 PM Richard Earnshaw > wrote:\n>>\n>> On targets that use short enums, this test produces different output\n>> since the fold optimization does not apply to sizes smaller than a word.\n>>\n>> Adjust the expected results until such time as this optimization can\n>> be expanded to support shorter input values.\n>>\n>> gcc/testsuite/ChangeLog:\n>>\n>>         PR tree-optimization/124909\n>>\n>>         * gcc.dg/match-shift-cmp-3.c:  Adjust expected results for\n>>         target short_enums.\n>>\n>>\n>>  Is this related to PR124633 ?\n>>\n> \n> Yes, I've linked that to my PR as I've more detail in there.\n\nShould we also pick this commit to releases/gcc-15?\n\nKind regards,\nTorbjörn\n\n> \n> R.\n> \n>> Thanks,\n>>\n>> Christophe\n>>\n>> ---\n>>  gcc/testsuite/gcc.dg/match-shift-cmp-3.c | 6 ++++--\n>>  1 file changed, 4 insertions(+), 2 deletions(-)\n>>\n>> diff --git a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n>> index e46ac30b905..5278b376717 100644\n>> --- a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n>> +++ b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n>> @@ -39,5 +39,7 @@ TEST_OP_CST (ne, !=, -2)\n>>  TEST_OP (eq, ==)\n>>  TEST_OP (ne, !=)\n>>\n>> -/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized } } */\n>> -/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized } } */\n>> +/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized { target { ! short_enums } } } } */\n>> +/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized { target { ! short_enums } } } } */\n>> +/* { dg-final { scan-tree-dump-times \"return 0;\" 4 optimized { target { short_enums } } } } */\n>> +/* { dg-final { scan-tree-dump-times \"return 1;\" 4 optimized { target { short_enums } } } } */\n>> --\n>> 2.43.0\n>>\n>","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=foss.st.com header.i=@foss.st.com header.a=rsa-sha256\n header.s=selector2 header.b=Es45mMUz;\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; 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Ip=[164.130.1.60];\n Helo=[smtpO365.st.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n AMS0EPF0000019F.eurprd05.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"GV2PR10MB6576","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":3678867,"web_url":"http://patchwork.ozlabs.org/comment/3678867/","msgid":"<50f2d3bc-9c39-4345-a326-2a00b33b82c8@arm.com>","list_archive_url":null,"date":"2026-04-17T19:46:31","subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","submitter":{"id":67887,"url":"http://patchwork.ozlabs.org/api/people/67887/","name":"Richard Earnshaw","email":"Richard.Earnshaw@arm.com"},"content":"On 17/04/2026 17:21, Torbjorn SVENSSON wrote:\n> \n> \n> On 2026-04-17 18:04, Richard Earnshaw (foss) wrote:\n>> On 17/04/2026 16:54, Christophe Lyon wrote:\n>>>\n>>>\n>>> On Fri, Apr 17, 2026 at 5:20 PM Richard Earnshaw >> > wrote:\n>>>\n>>>      On targets that use short enums, this test produces different \n>>> output\n>>>      since the fold optimization does not apply to sizes smaller than \n>>> a word.\n>>>\n>>>      Adjust the expected results until such time as this optimization \n>>> can\n>>>      be expanded to support shorter input values.\n>>>\n>>>      gcc/testsuite/ChangeLog:\n>>>\n>>>              PR tree-optimization/124909\n>>>\n>>>              * gcc.dg/match-shift-cmp-3.c:  Adjust expected results for\n>>>              target short_enums.\n>>>\n>>>\n>>>   Is this related to PR124633 ?\n>>>\n>>\n>> Yes, I've linked that to my PR as I've more detail in there.\n> \n> Should we also pick this commit to releases/gcc-15?\n\nNo, because the optimization wasn't added until November last year, so \nit's not applicable.\n\nR.\n\n> \n> Kind regards,\n> Torbjörn\n> \n>>\n>> R.\n>>\n>>> Thanks,\n>>>\n>>> Christophe\n>>>\n>>>      ---\n>>>       gcc/testsuite/gcc.dg/match-shift-cmp-3.c | 6 ++++--\n>>>       1 file changed, 4 insertions(+), 2 deletions(-)\n>>>\n>>>      diff --git a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c b/gcc/ \n>>> testsuite/gcc.dg/match-shift-cmp-3.c\n>>>      index e46ac30b905..5278b376717 100644\n>>>      --- a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n>>>      +++ b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n>>>      @@ -39,5 +39,7 @@ TEST_OP_CST (ne, !=, -2)\n>>>       TEST_OP (eq, ==)\n>>>       TEST_OP (ne, !=)\n>>>\n>>>      -/* { dg-final { scan-tree-dump-times \"return 0;\" 6 \n>>> optimized } } */\n>>>      -/* { dg-final { scan-tree-dump-times \"return 1;\" 6 \n>>> optimized } } */\n>>>      +/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized \n>>> { target { ! short_enums } } } } */\n>>>      +/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized \n>>> { target { ! short_enums } } } } */\n>>>      +/* { dg-final { scan-tree-dump-times \"return 0;\" 4 optimized \n>>> { target { short_enums } } } } */\n>>>      +/* { dg-final { scan-tree-dump-times \"return 1;\" 4 optimized \n>>> { target { short_enums } } } } */\n>>>      --\n>>>      2.43.0\n>>>\n>>\n>","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=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=g9BBkqCs;\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; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"8bit","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":3680608,"web_url":"http://patchwork.ozlabs.org/comment/3680608/","msgid":"","list_archive_url":null,"date":"2026-04-22T12:52:18","subject":"Re: [PATCH] testsuite: Adjust for short-enums in match-shift-cmp-3\n [PR124909]","submitter":{"id":671,"url":"http://patchwork.ozlabs.org/api/people/671/","name":"Jakub Jelinek","email":"jakub@redhat.com"},"content":"On Fri, Apr 17, 2026 at 04:20:09PM +0100, Richard Earnshaw wrote:\n> On targets that use short enums, this test produces different output\n> since the fold optimization does not apply to sizes smaller than a word.\n> \n> Adjust the expected results until such time as this optimization can\n> be expanded to support shorter input values.\n> \n> gcc/testsuite/ChangeLog:\n> \n> \tPR tree-optimization/124909\n> \n> \t* gcc.dg/match-shift-cmp-3.c: Adjust expected results for\n> \ttarget short_enums.\n> ---\n> gcc/testsuite/gcc.dg/match-shift-cmp-3.c | 6 ++++--\n> 1 file changed, 4 insertions(+), 2 deletions(-)\n> \n> diff --git a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> index e46ac30b905..5278b376717 100644\n> --- a/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> +++ b/gcc/testsuite/gcc.dg/match-shift-cmp-3.c\n> @@ -39,5 +39,7 @@ TEST_OP_CST (ne, !=, -2)\n> TEST_OP (eq, ==)\n> TEST_OP (ne, !=)\n> \n> -/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized } } */\n> -/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 6 optimized { target { ! short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 6 optimized { target { ! short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 0;\" 4 optimized { target { short_enums } } } } */\n> +/* { dg-final { scan-tree-dump-times \"return 1;\" 4 optimized { target { short_enums } } } } */\n\nLGTM.\n\n\tJakub","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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=iw9wjtmQ;\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; 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