[LLVMdev] Add call printf instructions problems

[Hongxu Chen]

As Tim said, call_print is one of the root causes.

Another problem is that for a pass, you'd better use
llvm::Module::getOrInsertFunction API.

Best Regards,
Hongxu Chen


On Mon, Dec 16, 2013 at 11:22 PM, Tim Northover-2 [via LLVM] <
ml-node+s1065342n64417h18 at n5.nabble.com> wrote:

> Hi Jin,
>
> It's difficult to say just from looking at a pass, but one thing looked
> odd:
>
> > CallInst *call_print =
> CallInst::Create(call_print,paramArrayRef,"",ins_temp);
>
> This looks very dodgy. The "call_print" being used as an argument is
> the (uninitialised) one that's just been declared. This could be the
> source of the assertion failure (though a segfault is just as likely).
>
> Other than that I'd suggest hooking up a debugger and going up the
> call frames when that assertion hits. That should tell you exactly
> which line of your pass is causing trouble.
>
> Cheers.
>
> Tim.
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