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</o:shapelayout></xml><![endif]--></head><body lang=KO link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>When linking .ll files with llvm-link or llvm-ld, the debug information is corrupted. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>As my investigation, alloca instruction, used to hold the debug information, nullifies the debug meta information <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>The attachments is the patch for it. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Index: lib/Transforms/Utils/ValueMapper.cpp<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>===================================================================<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>--- lib/Transforms/Utils/ValueMapper.cpp (revision 157974)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>+++ lib/Transforms/Utils/ValueMapper.cpp (working copy)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>@@ -85,6 +85,10 @@<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> // No operands needed remapping. Use an identity mapping.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> return const_cast<Value*>(V);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> }<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>+<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>+ // Alloca instruction is used to identify the holding information in llvm.dbg.declare<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>+ if (isa<AllocaInst>(V))<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>+ return const_cast<Value*>(V);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US> // Okay, this either must be a constant (which may or may not be mappable) or<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US> // is something that is not in the mapping table.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Sincerely yours,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Jaemin Park<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>