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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a problem that dbg_value nodes are not transferred when integer DAG nodes are promoted. For example, an i32 add node is promoted to a i64 add node by DAGTypeLegalizer::PromoteIntegerResult and its dbg_value node is not transferred
to the new node. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">t9: <span style="background:yellow;mso-highlight:yellow">i32</span> = add nsw t5, t8
<span style="font-family:Wingdings">à</span> t31: <span style="background:yellow;mso-highlight:yellow">
i64</span> = add t30, t7 ; the dbg_value node is not transferred to the new i64 add node.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For expansion, DAGTypeLegalizer::SetExpandedInteger calls transferDbgValues() but I couldn’t find any place to call trasnferDbgValues() for integer type promotion in DAGTypeLegalizer ::SetPromotedInteger and other places. I am wondering
If I miss anything or the legalization needs to call transferDbgValues() for this case.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I found this problem because a recently added unittest, DebugInfo/X86/linear-dbg-value.ll fails for my project, and the x86 and aarch64 backends don’t have this problem since they don’t promote i32 add nodes.<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">Sejong<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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