<?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>150759</bug_id>
          
          <creation_ts>2015-10-31 11:14:44 -0700</creation_ts>
          <short_desc>B3::LowerToAir should recognize Neg (i.e. Sub($0, value))</short_desc>
          <delta_ts>2015-11-03 16:42:19 -0800</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></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          <blocked>150279</blocked>
          <everconfirmed>1</everconfirmed>
          <reporter name="Filip Pizlo">fpizlo</reporter>
          <assigned_to name="Filip Pizlo">fpizlo</assigned_to>
          <cc>barraclough</cc>
    
    <cc>benjamin</cc>
    
    <cc>ggaren</cc>
    
    <cc>mark.lam</cc>
    
    <cc>mhahnenb</cc>
    
    <cc>msaboff</cc>
    
    <cc>nrotem</cc>
    
    <cc>oliver</cc>
    
    <cc>saam</cc>
    
    <cc>sam</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1138176</commentid>
    <comment_count>0</comment_count>
    <who name="Filip Pizlo">fpizlo</who>
    <bug_when>2015-10-31 11:14:44 -0700</bug_when>
    <thetext>I don&apos;t think that the current trySub() lowering handles this.

We could handle it either using a second pattern match rule, or by recognizing the zero immediate inside trySub().</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139168</commentid>
    <comment_count>1</comment_count>
      <attachid>264750</attachid>
    <who name="Filip Pizlo">fpizlo</who>
    <bug_when>2015-11-03 16:18:50 -0800</bug_when>
    <thetext>Created attachment 264750
the patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139173</commentid>
    <comment_count>2</comment_count>
      <attachid>264750</attachid>
    <who name="Benjamin Poulain">benjamin</who>
    <bug_when>2015-11-03 16:32:07 -0800</bug_when>
    <thetext>Comment on attachment 264750
the patch

View in context: https://bugs.webkit.org/attachment.cgi?id=264750&amp;action=review

&gt; Source/JavaScriptCore/b3/B3LoweringMatcher.patterns:40
&gt; +StoreSubLoad = Store(Sub(left, right), address)

Aw, crap.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1139180</commentid>
    <comment_count>3</comment_count>
    <who name="Filip Pizlo">fpizlo</who>
    <bug_when>2015-11-03 16:42:19 -0800</bug_when>
    <thetext>Landed in http://trac.webkit.org/changeset/191996</thetext>
  </long_desc>
      
          <attachment
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            <attachid>264750</attachid>
            <date>2015-11-03 16:18:50 -0800</date>
            <delta_ts>2015-11-03 16:32:07 -0800</delta_ts>
            <desc>the patch</desc>
            <filename>blah.patch</filename>
            <type>text/plain</type>
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<flag name="review"
          id="289856"
          type_id="1"
          status="+"
          setter="benjamin"
    />
          </attachment>
      

    </bug>

</bugzilla>