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[184.96.239.30]) by smtp.gmail.com with ESMTPSA id s60sm2091229qtd.16.2021.02.10.13.46.34 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Feb 2021 13:46:35 -0800 (PST) To: gcc-patches Subject: [committed] add test for PR 92879 Message-ID: <34c193dd-c28c-47ff-7cdc-2402897255f5@gmail.com> Date: Wed, 10 Feb 2021 14:46:34 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 Content-Language: en-US X-Spam-Status: No, score=-10.2 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Martin Sebor via Gcc-patches From: Martin Sebor Reply-To: Martin Sebor Errors-To: gcc-patches-bounces@gcc.gnu.org Sender: "Gcc-patches" The bug was resolved by r11-4745. I pushed the test in r11-7180. Martin commit 21c6ad7a12fecc4c85ac26289d9096379b550585 Author: Martin Sebor Date: Wed Feb 10 14:42:22 2021 -0700 Add test for PR tree-optimization/92879. gcc/testsuite/ChangeLog: PR tree-optimization/92879 * g++.dg/warn/Warray-bounds-16.C: New test. diff --git a/gcc/testsuite/g++.dg/warn/Warray-bounds-16.C b/gcc/testsuite/g++.dg/warn/Warray-bounds-16.C new file mode 100644 index 00000000000..17b4d0d194e --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Warray-bounds-16.C @@ -0,0 +1,29 @@ +/* PR tree-optimization/92879 - incorrect warning of __builtin_memset + offset is out of the bounds on zero-size allocation and initialization + { dg-do compile } + { dg-options "-O2 -Wall -fdump-tree-optimized" } */ + +inline void* operator new (__SIZE_TYPE__, void * v) +{ + return v; +} + +struct S +{ + int* p; + int m; + + S (int i) + { + m = i; + p = (int*) new unsigned char [sizeof (int) * m]; + + for (int i = 0; i < m; i++) + new (p + i) int (); + } +}; + +S a (0); + +/* Verify the loop has been eliminated. + { dg-final { scan-tree-dump-not "goto" "optimized" } } */