[LLVMdev] About writing a modulePass in addPreEmitPass() for NVPTX

[Antony Yu]

So that's how it is !! Thanks!

Hmm,  in fact, I want to get Call Graph information in machine code stage,
is there any way to get this?

I try CallGraph &g= getAnalysis<CallGraph>, but it prints the same error and
doesn't work as expected.


Antony Yu


Justin Holewinski-2 wrote
> Sorry for the delay.  Yeah, that error message is a bit confusing.  What's
> happening is that your pass sequence is invalid.  Once the IR has been
> lowered to machine code, its too late to run LLVM IR passes (ModulePass,
> FunctionPass, CallGraphSCCPass, etc.).  At that point, you need to run a
> Machine*Pass, e.g. MachineFunctionPass.  If you need to run an IR level
> pass, you need to use addIRPasses().
> 
> -- 
> 
> Thanks,
> 
> Justin Holewinski
> 
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