Needs LLVM 8+ but doesn't check

[t-vi]

Hi,

I get a build failure with the default LLVM (7). Apparently toSPFlags is LLVM 8+.

codegen_llvm.cc: In member function ‘void tvm::codegen::CodeGenLLVM::AddDebugInformation(llvm::Function*)’:

codegen_llvm.cc:214:27: error: ‘toSPFlags’ is not a member of ‘llvm::DISubprogram’
       llvm::DISubprogram::toSPFlags(true, true, true)

Quite likely, one would also want to change the detection to not try with llvm 7 etc.

Best regards

Thomas

P.S.: I'd be happy to send a PR.

[bwasti]

ah good catch! For now I can just remove the debug code as it isn't functionality blocking

a840531