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Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.
This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79977 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -90,7 +90,7 @@ void PrintDbgInfo::printStopPoint(const DbgStopPointInst *DSI) {
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}
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void PrintDbgInfo::printFuncStart(const DbgFuncStartInst *FS) {
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DISubprogram Subprogram(cast<GlobalVariable>(FS->getSubprogram()));
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DISubprogram Subprogram(FS->getSubprogram());
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std::string Res1, Res2;
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Out << "; fully qualified function name: " << Subprogram.getDisplayName(Res1)
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<< " return type: " << Subprogram.getReturnTypeName(Res2)
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