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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The patch should probably define a new vendor code for SUN rather than re-use GNU. And it needs a test.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We've been fortunate (or maybe it's a testament to the care exercised by people who define extensions) to see no conflicts in vendor extensions. If/when it
ever comes up we'll have to do something, I think Adrian had a pretty reasonable idea.<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--paulr<o:p></o:p></span></a></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> aprantl@apple.com [mailto:aprantl@apple.com]
<br>
<b>Sent:</b> Thursday, April 27, 2017 8:50 AM<br>
<b>To:</b> David Blaikie<br>
<b>Cc:</b> David Gwynne; llvm-dev@lists.llvm.org; Robinson, Paul<br>
<b>Subject:</b> Re: [llvm-dev] recognise DW_AT_SUN_amd64_parmdump dwarf attribute<o:p></o:p></span></p>
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<p class="MsoNormal">On Apr 27, 2017, at 8:38 AM, David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">This'll need a test case, in any case.<o:p></o:p></p>
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<p class="MsoNormal">In case you're wondering, one way to do this would be to add an assembler source file, compile it and run it through llvm-dwarfdump.<o:p></o:p></p>
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<p class="MsoNormal">Alternatively you can use the new yaml2obj tool that is being developed.<o:p></o:p></p>
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<p class="MsoNormal">-- adrian<o:p></o:p></p>
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Adrian/Paul: Pondering this, any thoughts on how conflicts in the vendor extension range of attributes, forms, etc, should be resolved if they ever come up? (each vendor is free to define them as they wish, so it could be that multiple vendors have different
definitions of the same code/number & would be ambiguous) I don't see any reason to block this patch if it doesn't have such a conflict, since there are already other vendor extension codes supported here for a variety of vendors - but does make me wonder.<o:p></o:p></p>
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<p class="MsoNormal">On Thu, Apr 27, 2017 at 2:50 AM David Gwynne via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org">llvm-dev@lists.llvm.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">sun created this tag for identifying functions that dumped their<br>
register arguments onto the stack.<br>
<br>
this is enough for llvm-dwarfdump to recognise and print the attribute.<br>
<br>
hopefully someone will commit it.<br>
<br>
cheers,<br>
dlg<br>
<br>
Index: include/llvm/Support/Dwarf.def<br>
===================================================================<br>
--- include/llvm/Support/Dwarf.def (revision 301500)<br>
+++ include/llvm/Support/Dwarf.def (working copy)<br>
@@ -343,6 +343,8 @@<br>
HANDLE_DW_AT(0x2134, GNU_pubnames, 0, GNU)<br>
HANDLE_DW_AT(0x2135, GNU_pubtypes, 0, GNU)<br>
HANDLE_DW_AT(0x2136, GNU_discriminator, 0, GNU)<br>
+// Sun Extension<br>
+HANDLE_DW_AT(0x2224, SUN_amd64_parmdump, 0, GNU)<br>
// Borland extensions.<br>
HANDLE_DW_AT(0x3b11, BORLAND_property_read, 0, BORLAND)<br>
HANDLE_DW_AT(0x3b12, BORLAND_property_write, 0, BORLAND)<br>
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<a href="http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" target="_blank">http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><o:p></o:p></p>
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