[llvm-dev] LLVM 3.8.0 - Adding new instruction to a basic block

[Ryan Taylor via llvm-dev]

Try incrementing the iterator before using.

On Sep 5, 2016 10:26, "Simona Simona via llvm-dev" <llvm-dev at lists.llvm.org>
wrote:

> On Mon, Sep 5, 2016 at 3:20 AM, Daniel Berlin <dberlin at dberlin.org> wrote:
>
>>
>>
>> On Sun, Sep 4, 2016 at 1:06 PM, Simona Simona via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>> Hello,
>>>
>>> I'm trying to add a new instruction after a given instruction in a basic
>>> block.
>>> Until LLVM 3.7, I was using the following code:
>>>
>>>    BB->getInstList().insertAfter(I, new_inst);
>>>    [where both I and new_inst are Instruction*]
>>>
>>> In LLVM 3.8 however, the SymbolTableList was created as a wrapper over
>>> iplist.
>>> Could anyone please tell me how I can do the same type of insertion in
>>> LLVM 3.8?
>>>
>>
>>      auto InsertPt = I->getIterator();
>>      BB->getInstList().insert(InsertPt, new_inst);
>>
>>
> Thanks, Daniel!
>
> In your example, isn't "insert" inserting "new_inst" *before* instruction
> "I"?
> As I would like to insert the "new_inst" instruction after "I", shouldn't
> it be
>          BB->getInstList().insertAfter(InsertPt, new_inst); ?
>
> With insert I currently get the following error:
>          Instruction does not dominate all uses!
>          %0 = getelementptr inbounds i8, i8* getelementptr inbounds ([8 x
> i8], [8 x i8]* @1, i32 0, i32 0)
>          call void @myCall(i8* %0)
>
> Regards,
> Simona
>
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