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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>More information on this… still not
working</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>When I build the project for Debug and run
the program, the following message is printed before assert.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>NODE: 0x937bac8: i64 = GlobalAddress
<i32* @var> 0</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I guess it is expecting that GlobalAddress
be legalized before reaching ExpandOp(). I haven’t implemented anything
for ISD::GlobalAddress, and that may explain it, however, I couldn’t find
much about it in the PowerPC implementation either. The only thing is in the
ctor of PPCTargetLowering there is setOperationAction(ISD::GlobalAddress,
MVT::i32, Custom); and </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>setOperationAction(ISD::GlobalAddress,
MVT::i64, Custom);</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>so I also added these two function calls
to my ctor of PICxxTargetLowering. Nothing changed. I also tried “Expand”
and “Legal” instead of “Custom”, still no progress. I’m
sure I am missing some thing here.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Any idea??</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Thanks</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A.</span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
llvmdev-bounces@cs.uiuc.edu [mailto:llvmdev-bounces@cs.uiuc.edu] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Evan Cheng<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, September 10, 2007
10:29 AM<br>
<b><span style='font-weight:bold'>To:</span></b> LLVM Developers Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [LLVMdev] New to
LLVM, Help needed</span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Please do a debug build and run it under gdb. Let us know where it is
asserting and what it is asserting on so we can help you.</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Evan</span></font></p>
</div>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Sep 7, 2007, at 4:50 PM, <a
href="mailto:Alireza.Moshtaghi@microchip.com">Alireza.Moshtaghi@microchip.com</a>
wrote:</span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
<br>
</span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Hi,</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>I have started to write an llvm backend
for one of our microcontrollers (PICxx). I started studying the framework of
PowerPc backend of llvm and decided to start by following that framework. Now I
have most of the classes and Tblgen files written for a very basic hypothetical
microcontroller with very few instructions.</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>The project builds and the llc recognizes
the new processor, however, when it reaches the point where it wants to lower
llvm IR to PICxx DAG, it asserts in LegalizeDAG.cpp in ExpandOp() function
after it hits the default case of switch(Node->getOpcode())</span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Can someone please help me understand how
am I ending up in the default case?</span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'> </span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>Thanks,</span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:black'>A.</span></font></p>
</div>
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