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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am getting an assert on a bad legalization.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Assertion failed: Result.getValueType() == Op.getValueType()
&& "Bad legalization!", file
..\..\lib\CodeGen\SelectionDAG\LegalizeDAG.cpp, line 3976<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Can someone explain to me what this means in term of backend
code generation, how it might be occurring, and possible ways to fix this? I
don’t see how the value type of an operation and the result being the
same can cause an issue.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The IR code in question is as follows:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>define void @ test_unary_func_absolute_value(i32 %x, i32
addrspace(11)* %result) {<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>entry:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> %call = tail call i32 (...)* </span></font><font
size=2 face=Arial><span lang=PL style='font-size:10.0pt;font-family:Arial'>@abs(
i32 %x ) ; <i32> [#uses=1]<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=PL style='font-size:10.0pt;
font-family:Arial'> </span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>store i32 %call, i32 addrspace(11)*
%result<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> ret void<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>}<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>declare i32 @abs(...)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Micah Villmow<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Systems Engineer<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Advanced Technology & Performance<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Advanced Micro Devices Inc.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:Street w:insAuthor="Micah Villmow"
w:insDate="2008-09-15T15:03:00Z" w:endInsAuthor="Micah Villmow"
w:endInsDate="2008-09-15T15:03:00Z"><ns0:address w:insAuthor="Micah Villmow"
w:insDate="2008-09-15T15:03:00Z" w:endInsAuthor="Micah Villmow"
w:endInsDate="2008-09-15T15:03:00Z"><st1:Street w:st="on"><st1:address w:st="on">4555
Great America Pkwy</st1:address></st1:Street></ns0:address></ns0:Street>,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:place w:insAuthor="Micah Villmow"
w:insDate="2008-09-15T15:03:00Z" w:endInsAuthor="Micah Villmow"
w:endInsDate="2008-09-15T15:03:00Z"><ns0:City w:insAuthor="Micah Villmow"
w:insDate="2008-09-15T15:03:00Z" w:endInsAuthor="Micah Villmow"
w:endInsDate="2008-09-15T15:03:00Z"><st1:City w:st="on"><st1:place w:st="on">Santa
Clara</st1:place></st1:City></ns0:City></ns0:place>, CA. 95054<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>P: 408-572-6219<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>F: 408-572-6596</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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