llvm dev - Jun 2010 - [LLVMdev] IntrinsicLowering and several related problems

Dear all,

I'm using IntrinsicLowering class to remove all intrinsics in LLVM
byte-code.
Unfortunately, I meet several problems:
1. Why I can not get the type of CallInst *CI?
   !CI->getType()->isVoidTy() is not working and how to solve it?
   This type information has some impacts with intrinsics such as flt_rounds.

2. Why Intrinsic::vastart and Intrinsic::powi are excluded from
IntrinsicLowering function?
There are no way to lower them at the byte-code level?

Best regards,
-- 
Hao Shen

Hi Hao Shen,
> 1. Why I can not get the type of CallInst *CI?
>     !CI->getType()->isVoidTy() is not working and how to solve it?
what does "not working" mean?  It should work.
> 2. Why Intrinsic::vastart and Intrinsic::powi are excluded from
> IntrinsicLowering function?
> There are no way to lower them at the byte-code level?
For vastart, it probably isn't possible at the byte-code level.
For powi, my guess is that it is a mistake and should be lowered.

Ciao,

Duncan.

On Mon, Jun 7, 2010 at 9:47 PM, Duncan Sands <baldrick at free.fr>
wrote:
> Hi Hao Shen,
>
>> 1. Why I can not get the type of CallInst *CI?
>>     !CI->getType()->isVoidTy() is not working and how to solve
it?
>
> what does "not working" mean?  It should work.
Here CI->getType()->isVoidTy() always returns true and it should be
true sometimes?
>
>> 2. Why Intrinsic::vastart and Intrinsic::powi are excluded from
>> IntrinsicLowering function?
>> There are no way to lower them at the byte-code level?
>
> For vastart, it probably isn't possible at the byte-code level.
>From what I understand, the vastart will be compiled into some
stack operations realized with assembly code. So there will be
no byte-code level things?
> For powi, my guess is that it is a mistake and should be lowered.
Thanks a lot, I will try to find why powi is not working.
>
> Ciao,
>
> Duncan.
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-- 
Hao Shen