<div dir="ltr">As far as my limited understanding goes, this should be a bugfix (correctness) and it should trump backward compatibility requirement. It makes no sense to me to continue backward compatible incorrectness.<div><br></div><div>Kevin</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 9, 2017 at 10:21 AM, Steven Perron via llvm-dev <span dir="ltr"><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="m_8596073351940825992socmaildefaultfont" dir="ltr" style="font-family:Arial,Helvetica,sans-serif;font-size:10.5pt"><div dir="ltr">I could make something like Daniel's suggestion work. The main question I still have is how we tell the difference between the "old-style" DAG and the "new-style" DAG? I don't know if there is some standard way of doing this. Do we just base it on the version of llvm-ir?</div>
<div dir="ltr"> </div>
<div dir="ltr">Would there be a need to maintain different code for both type of DAG? If we change clang to generate the new-style DAG, things will be fine for C/C++. However, will this force other components that generate llvm-ir to change?</div>
<div dir="ltr"> </div>
<div dir="ltr">In general, what kind of backwards compatibility do we need to keep?</div>
<div dir="ltr"> </div>
<div dir="ltr">Later,</div>
<div dir="ltr">Steven Perron</div></div><br>
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