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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-19338] Evaluate feasibility and impact of not disabling strict aliasing</title>
                <link>https://jira.mongodb.org/browse/SERVER-19338</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We currently disable the compilers alias based optimziations by building with -fno-strict-aliasing, due to a small number of aliasing violations.&lt;/p&gt;

&lt;p&gt;The majority of these aliasing violations are in the mmap subsystem.&lt;/p&gt;

&lt;p&gt;We should switch the default to build with type based alias analysis enabled, and only disable it for subsystems which require it.&lt;/p&gt;</description>
                <environment></environment>
        <key id="215737">SERVER-19338</key>
            <summary>Evaluate feasibility and impact of not disabling strict aliasing</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-devplatform">[DO NOT ASSIGN] Backlog - Server Development Platform Team (SDP)</assignee>
                                    <reporter username="andrew.morrow@mongodb.com">Andrew Morrow</reporter>
                        <labels>
                    </labels>
                <created>Wed, 8 Jul 2015 22:39:16 +0000</created>
                <updated>Fri, 27 Oct 2023 17:20:37 +0000</updated>
                            <resolved>Fri, 27 Oct 2023 17:20:37 +0000</resolved>
                                                                    <component>Build</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="3678937" author="xgen-internal-githook" created="Tue, 23 Mar 2021 13:16:54 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Andrew Morrow&apos;, &apos;email&apos;: &apos;acm@mongodb.com&apos;, &apos;username&apos;: &apos;acmorrow&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-19338&quot; title=&quot;Evaluate feasibility and impact of not disabling strict aliasing&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-19338&quot;&gt;&lt;del&gt;SERVER-19338&lt;/del&gt;&lt;/a&gt; Add an experiment for allowing type-based alias analysis&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/691cb1577300d5df5118cd2b77c02b99a833d174&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/691cb1577300d5df5118cd2b77c02b99a833d174&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="992443" author="redbeard0531" created="Wed, 29 Jul 2015 22:33:29 +0000"  >&lt;p&gt;We need to fix BufReader before we enable strict aliasing. Should be as simple as changing the (T*)_pos lines to call memcpy.&lt;/p&gt;</comment>
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            <issuekey id="216215">SERVER-19362</issuekey>
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            <issuekey id="215834">SERVER-19340</issuekey>
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