Extended Description

With trunk r219051 Visual C++ warns:

C:\llvm-clean\include\llvm/ADT/StringRef.h(351): warning C4805: '!=' : unsafe mix of type 'bool' and type 'unsigned __int64' in operation (......\lib\Analysis\ModuleDebugInfoPrinter.cpp) [C:\llvm-clean\msvc\lib\Analysis\LLVMAnalysis.vcxproj]
C:\llvm-clean\include\llvm/IR/DebugInfo.h(200) : see reference to function template instantiation 'bool llvm::Stri
ngRef::getAsInteger(unsigned int,T &) const' being compiled
with
[
T=bool
]
C:\llvm-clean\include\llvm/IR/DebugInfo.h(554) : see reference to function template instantiation 'T llvm::DIDescr
iptor::getHeaderFieldAs(unsigned int) const' being compiled
with
[
T=bool
]

the warning may have merit, when getHeaderFieldAs instantiates getAsInteger with T=bool ,the comparison logic

static_cast(ULLVal) != ULLVal)

which for integers checks if the ULLVal fits in a T sized integer will work somewhat differently for a bool. It will check if ULLVal was 0 or 1 and if not return an error code. This in incosistent with the usual C++ assumption that any non-zero is true.