<div dir="ltr">I think mainly to ensure that we don't have extra padding in DIType objects:<div><br><div><div>class DIType : public DIScope {</div><div>  unsigned Line;</div><div>  DIFlags Flags;</div><div>  uint64_t SizeInBits;</div><div>  uint64_t OffsetInBits;</div><div>  uint32_t AlignInBits;</div></div><div><br></div><div>If DIFlags grew to 64-bits, we'd want to re-arrange things to save memory. DITypes have been known to consume large amounts of memory.</div></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Jul 16, 2018 at 5:57 AM Sohail Somani (Fizz Buzz Inc.) 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:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><u></u>





<div><div style="font-family:Arial">Hi list,<br></div>
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<div style="font-family:Arial">Is there a standards based reason why the DIFlags enum is set to uint32_t[1]? I am sure my DWARF-std-reading-fu is not up to snuff and so I cannot seem to find it.<br></div>
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<div style="font-family:Arial">The reason I ask is that we are running out of space for our own DIFlags and would like to nail this down before deciding on an approach.<br></div>
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<div style="font-family:Arial">Thanks!<br></div>
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<div style="font-family:Arial">Sohail <br></div>
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<div style="font-family:Arial">[1] The code in question: <a href="https://github.com/llvm-mirror/llvm/blob/master/include/llvm/IR/DebugInfoMetadata.h#L194" target="_blank">https://github.com/llvm-mirror/llvm/blob/master/include/llvm/IR/DebugInfoMetadata.h#L194</a><br></div>
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