[llvm-dev] How to set DebugLoc when using IRBuilder's CreateCall ?

[PenYiWang via llvm-dev]

I use DebugLoc of nearest instruction (before or after).
Then I solve this problem.

Thank You
Help me a lot !!

Robinson, Paul <paul.robinson at sony.com> 於 2020年2月28日 週五 上午2:19寫道：

> Applying a “wrong” DebugLoc to an Instruction will not cause any errors.
> The “wrong” location would be carried through to the debugging information
> in the object file, which might cause your debugger to do something
> unexpected while debugging the program.
>
>
>
> One tactic, which ought to be fairly easy, is to give your new Instruction
> the same DebugLoc as the Instruction before (or after) your new
> Instruction.  This will make your new Instruction appear to be part of the
> same source statement as the neighboring Instruction.
>
>
>
> Hope this helps,
>
> --paulr
>
>
>
> *From:* llvm-dev <llvm-dev-bounces at lists.llvm.org> *On Behalf Of *PenYiWang
> via llvm-dev
> *Sent:* Thursday, February 27, 2020 6:33 AM
> *To:* llvm-dev at lists.llvm.org
> *Subject:* [llvm-dev] How to set DebugLoc when using IRBuilder's
> CreateCall ?
>
>
>
>
>
> Hi
>
>
>
> I want to insert some functions into the llvm bitcode ir files.
>
>
>
> So I use IRBuilder and CreateCall().
>
>
>
> But it how error : inlinable function call in a function with debug info
> must have a !dbg location.
>
>
>
> I don't know what DebugLoc should I give the new CallInst  to setDebugLoc.
>
>
>
> I Create this CallInst , so this CallInst doesn't hava so-called
> "DebugLoc" mapping to the source code , right ?
>
>
>
> And also I want the compiler can do some inline optimization to my program.
>
>
>
> So I have to give this CallInst a DebugLoc....
>
>
>
> What would happen if the DebugLoc of an Instruction is wrong ?
>
>
>
> would there be any error?
>
>
>
> Thanks.
>
>
>
>
>
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