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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The insertion of DBG_VALUE instructions for spills does not seem to be handling insert locations inside bundles well. If the spill instruction is part of a bundle, the new DBG_VALUE is inserted after it, but does not have the bundling flags
set. This essentially means that if we start with a set of bundled instructions:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">MI1 [BundledSucc=true, BundledPred=false]<o:p></o:p></p>
<p class="MsoNormal">MI2 [BundledSucc=false, BundledPred=true]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Where MI1 is a spill, and MI2 is a different instruction, after ExtendRanges we end up with<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">MI1 [BundledSucc=true, BundledPred=false]<o:p></o:p></p>
<p class="MsoNormal">DBG_VALUE MI [BundledSucc=false, BundledPred=false]<o:p></o:p></p>
<p class="MsoNormal">MI2 [BundledSucc=false, BundledPred=true]<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Since this happens after the final instruction scheduling, it results in broken schedules. I believe setting the bundling flags before invoking MBB->insertAfter in ExtendRanges should fix this.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal">Saurabh Verma<o:p></o:p></p>
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