<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>150958</bug_id>
          
          <creation_ts>2015-11-05 15:06:51 -0800</creation_ts>
          <short_desc>B3::reduceStrength should canonicalize integer comparisons</short_desc>
          <delta_ts>2018-03-12 17:24:21 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>JavaScriptCore</component>
          <version>WebKit Nightly Build</version>
          <rep_platform>All</rep_platform>
          <op_sys>All</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          <dependson>150721</dependson>
          <blocked>154319</blocked>
    
    <blocked>183543</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="Filip Pizlo">fpizlo</reporter>
          <assigned_to name="Yusuke Suzuki">ysuzuki</assigned_to>
          <cc>commit-queue</cc>
    
    <cc>ews-watchlist</cc>
    
    <cc>fpizlo</cc>
    
    <cc>keith_miller</cc>
    
    <cc>lforschler</cc>
    
    <cc>mark.lam</cc>
    
    <cc>msaboff</cc>
    
    <cc>saam</cc>
    
    <cc>webkit-bug-importer</cc>
    
    <cc>ysuzuki</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1139791</commentid>
    <comment_count>0</comment_count>
    <who name="Filip Pizlo">fpizlo</who>
    <bug_when>2015-11-05 15:06:51 -0800</bug_when>
    <thetext>Integer comparisons are not necessarily commutative, but you can swap the operands if you also flip the comparison - for example you can turn LessThan(const, var) into GreaterThan(var, const).  We should use this property to &quot;sort&quot; the operands the same way we do for commutative operations.

This will let us get rid of a lot of cases in the B3::lowerToAir() pattern matching.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405490</commentid>
    <comment_count>1</comment_count>
      <attachid>335517</attachid>
    <who name="Yusuke Suzuki">ysuzuki</who>
    <bug_when>2018-03-10 12:10:17 -0800</bug_when>
    <thetext>Created attachment 335517
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405491</commentid>
    <comment_count>2</comment_count>
      <attachid>335518</attachid>
    <who name="Yusuke Suzuki">ysuzuki</who>
    <bug_when>2018-03-10 12:11:34 -0800</bug_when>
    <thetext>Created attachment 335518
Patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405539</commentid>
    <comment_count>3</comment_count>
      <attachid>335518</attachid>
    <who name="Yusuke Suzuki">ysuzuki</who>
    <bug_when>2018-03-10 22:50:29 -0800</bug_when>
    <thetext>Comment on attachment 335518
Patch

Thanks!</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405541</commentid>
    <comment_count>4</comment_count>
      <attachid>335518</attachid>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2018-03-10 23:16:20 -0800</bug_when>
    <thetext>Comment on attachment 335518
Patch

Clearing flags on attachment: 335518

Committed r229513: &lt;https://trac.webkit.org/changeset/229513&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405542</commentid>
    <comment_count>5</comment_count>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2018-03-10 23:16:21 -0800</bug_when>
    <thetext>All reviewed patches have been landed.  Closing bug.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405558</commentid>
    <comment_count>6</comment_count>
    <who name="Yusuke Suzuki">ysuzuki</who>
    <bug_when>2018-03-11 09:51:04 -0700</bug_when>
    <thetext>Oops, this patch may create an orphan value which is not allowed by B3Validate.
It is also fixed in bug 183543.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1405996</commentid>
    <comment_count>7</comment_count>
    <who name="Radar WebKit Bug Importer">webkit-bug-importer</who>
    <bug_when>2018-03-12 17:24:21 -0700</bug_when>
    <thetext>&lt;rdar://problem/38397856&gt;</thetext>
  </long_desc>
      
          <attachment
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            <attachid>335517</attachid>
            <date>2018-03-10 12:10:17 -0800</date>
            <delta_ts>2018-03-10 12:11:32 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-150958-20180311051016.patch</filename>
            <type>text/plain</type>
            <size>11137</size>
            <attacher name="Yusuke Suzuki">ysuzuki</attacher>
            
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          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>335518</attachid>
            <date>2018-03-10 12:11:34 -0800</date>
            <delta_ts>2018-03-10 23:16:20 -0800</delta_ts>
            <desc>Patch</desc>
            <filename>bug-150958-20180311051133.patch</filename>
            <type>text/plain</type>
            <size>11055</size>
            <attacher name="Yusuke Suzuki">ysuzuki</attacher>
            
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</data>

          </attachment>
      

    </bug>

</bugzilla>