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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This patch addresses PR 13837 (<a href="http://llvm.org/bugs/show_bug.cgi?id=13837" target="_blank">http://llvm.org/bugs/show_bug.cgi?id=13837</a> ):<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When a vector is created from type conversion, it generates multiple scalar conversion instead of a vectorized conversion.<o:p></o:p></p><p class=MsoNormal>For example:<o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>int4 conv4i(float4 in)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>{<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> int4 out={ (int)in.x, (int)in.y, (int)in.z, (int)in.w};<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'> return out;<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>}<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Current LLVM first extracts each element of “in” and then does a fp-to-si for each element and then builds the result vector.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This patch allows a vectorized fp-to-si conversion against the input vector directly, thus results in better performance.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>A set of unit tests are included in the patch as well.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>It passes all the test suite and no new fails for the unit test.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Please review the attached patch.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Weiming<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>