<div dir="ltr">From my experience, you'd better create a new one, for example:<div><br><div>int i[] = {1,2,3};</div><div><br></div><div>in my compiler I first create an array type with length is 0, then create a new type which length is 3 after the initializer is evaluated.</div><div><br></div><div>I tried the API mutateType, but it doesn't work as expected. So just delete the old one and create a new one.</div><div><br></div><div>That's my suggestion.</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Oct 16, 2019 at 7:19 PM Celine via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>Thank you very much for this information~</div><div><br></div><div><br></div><div style="font-size:12px;font-family:"Arial Narrow";padding:2px 0px">------------------ 原始邮件 ------------------</div><div style="font-size:12px;background:rgb(239,239,239);padding:8px"><div><b>发件人:</b> "Krzysztof Parzyszek"<<a href="mailto:kparzysz@quicinc.com" target="_blank">kparzysz@quicinc.com</a>>; </div><div><b>发送时间:</b> 2019年10月15日(星期二) 晚上8:34</div><div><b>收件人:</b> "Celine"<<a href="mailto:595602881@qq.com" target="_blank">595602881@qq.com</a>>; "llvm-dev"<<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>>; </div><div><b>主题:</b> RE: [llvm-dev] How to change IR type?</div></div><div><br></div>
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<p class="MsoNormal">In general you can use Value::mutateType to change the type of a value. You can’t change the types arbitrarily though, I think that the operands to “add” still need to have the same type.<u></u><u></u></p>
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<p class="MsoNormal"><span style="font-size:9pt;font-family:Consolas">-- </span>
<span style="font-size:9pt;font-family:Consolas"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8pt;font-family:Consolas">Krzysztof Parzyszek
<a href="mailto:kparzysz@quicinc.com" target="_blank"><span style="color:rgb(5,99,193)">kparzysz@quicinc.com</span></a> AI tools development<u></u><u></u></span></p>
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<p class="MsoNormal"><b>From:</b> llvm-dev <<a href="mailto:llvm-dev-bounces@lists.llvm.org" target="_blank">llvm-dev-bounces@lists.llvm.org</a>> <b>On Behalf Of
</b>Celine via llvm-dev<br>
<b>Sent:</b> Tuesday, October 15, 2019 5:25 AM<br>
<b>To:</b> llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>><br>
<b>Subject:</b> [EXT] [llvm-dev] How to change IR type?<u></u><u></u></p>
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<p class="MsoNormal">hello,<u></u><u></u></p>
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<p class="MsoNormal">I want to change the following IR:<u></u><u></u></p>
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<p class="MsoNormal"> %2 = tail call i16 @llvm.nvvm.read.ptx.sreg.tid.x() #2<br>
%add = add i16 %mul6, %2<u></u><u></u></p>
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<p class="MsoNormal">to <u></u><u></u></p>
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<p class="MsoNormal"> %2 = tail call i16v @llvm.nvvm.read.ptx.sreg.tid.x() #2<br>
(i16v)%add = add i16 %mul6, (i16v)%2 //Here keep %mul6 i16 as it is.<u></u><u></u></p>
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<p class="MsoNormal">I'm not familar with LLVM IR API, it's not easy to get the type and change it right away. Seems need to create a new IR and replace the old one?
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<p class="MsoNormal">But it's also hard to CreateCall() or CreateAdd(), hard to get the original IR's info to fill in those CreateXXX parameter.
<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Any ideas or reference code?<u></u><u></u></p>
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<p class="MsoNormal">How to learn LLVM IR API quickly?<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">--<u></u><u></u></p>
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<p class="MsoNormal">Best Regards<u></u><u></u></p>
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<p class="MsoNormal">Celine<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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