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<p class="MsoNormal">Thanks for help!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sejong<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> aprantl@apple.com <aprantl@apple.com> <br>
<b>Sent:</b> Monday, April 30, 2018 3:18 PM<br>
<b>To:</b> Se Jong Oh <sejooh@microsoft.com><br>
<b>Cc:</b> jdevlieghere@apple.com; Vedant Kumar <vsk@apple.com>; llvm-dev@lists.llvm.org; pidgeot18@gmail.com<br>
<b>Subject:</b> Re: [llvm-dev] [SelectionDAG] DbgValue nodes aren't transferred<o:p></o:p></p>
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<p class="MsoNormal">On Apr 30, 2018, at 3:16 PM, Se Jong Oh <<a href="mailto:sejooh@microsoft.com">sejooh@microsoft.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">For cast instructions, llvm::salvageDebugInfo() simply makes dbg.value point to the source of the cast. Since SelectionDAG already has transferDbgValues which can move dbgvalue to the cast source, I think that we can just call it where
the truncate is optimized away.<o:p></o:p></p>
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<p class="MsoNormal">That sounds reasonable, yes. Casts are effectively transparent for debug info purposes.<o:p></o:p></p>
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<p class="MsoNormal">-- adrian<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Sejong<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b><span class="apple-converted-space"> </span><a href="mailto:aprantl@apple.com"><span style="color:purple">aprantl@apple.com</span></a><span class="apple-converted-space"> </span><<a href="mailto:aprantl@apple.com"><span style="color:purple">aprantl@apple.com</span></a>><span class="apple-converted-space"> </span><br>
<b>Sent:</b><span class="apple-converted-space"> </span>Monday, April 30, 2018 2:59 PM<br>
<b>To:</b><span class="apple-converted-space"> </span>Se Jong Oh <<a href="mailto:sejooh@microsoft.com"><span style="color:purple">sejooh@microsoft.com</span></a>><br>
<b>Cc:</b><span class="apple-converted-space"> </span><a href="mailto:jdevlieghere@apple.com"><span style="color:purple">jdevlieghere@apple.com</span></a>; Vedant Kumar <<a href="mailto:vsk@apple.com"><span style="color:purple">vsk@apple.com</span></a>>;<span class="apple-converted-space"> </span><a href="mailto:llvm-dev@lists.llvm.org"><span style="color:purple">llvm-dev@lists.llvm.org</span></a>;<span class="apple-converted-space"> </span><a href="mailto:pidgeot18@gmail.com"><span style="color:purple">pidgeot18@gmail.com</span></a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [llvm-dev] [SelectionDAG] DbgValue nodes aren't transferred<o:p></o:p></p>
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<p class="MsoNormal">On Apr 30, 2018, at 2:57 PM, Se Jong Oh <<a href="mailto:sejooh@microsoft.com"><span style="color:purple">sejooh@microsoft.com</span></a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Thanks! It looks like SelectionDAG::salvageDebugInfo handles only addition with constant.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">You can look at llvm::salvageDebugInfo() for examples on how to handle other situations.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">-- adrian<o:p></o:p></p>
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