[LLVMdev] how to define INTRINSIC_W_CHAIN

[kewuzhang]

Tks Tom, 

That is my confusing part.  How can I make it to "access memory” so it will  HasChain?

Is there any flag set like in typeProfile, Node, instructions?   myLoad, mayStore, SDNPHasChain?


-kevin
On Jul 18, 2014, at 4:26 PM, Tom Stellard <tom at stellard.net> wrote:

> On Fri, Jul 18, 2014 at 04:15:45PM -0400, kewuzhang wrote:
>> sure!
>> 
>> class TEST_INTINSIC_FM< string asmstr> : Intrinsic
>> 	 <llvm_i32_ty], [llvm_i32_ty, llvm_ptr_ty],
>> 	[IntrReadWriteArgMem],
>> 	!strconcat(“llvm.test”, asmstr),”.float”)
>> 	>;
> 
> Have a look at the SelectionDAGBuilder::visitTargetIntrinsic()
> function in lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp.  That is
> where intrinsics are lowered to SelectionDAG nodes, so you can start
> your debugging there to try to figure out why it is INSTRINSIC_WO_CHAIN.
> 
> -Tom
> 
>> 
>> tks
>> On Jul 18, 2014, at 4:06 PM, Tom Stellard <tom at stellard.net> wrote:
>> 
>>> On Fri, Jul 18, 2014 at 03:19:47PM -0400, kewuzhang wrote:
>>>> en!
>>>> 
>>>> my test is : %r1 = call<float> @test.adddiv( <float> %r0, <float>* %p0).
>>>> since 
>>>> 
>>> 
>>> Can you show us the code from your .td file where you define the intrinsic?
>>> 
>>> -Tom
>>> 
>>>>>> but somehow it always fall into INTRINSIC_WO_CHAIN category.  
>>>> (caught it in lowering..)
>>>> 
>>>> I think it doesn’t have chain in initial DAG.
>>>> 
>>>> unfortunately the intrinsic “test.adddiv” is defined by me for now.  not sure how to make it has a chain.
>>>> 
>>>> kevin
>>>> 
>>>> 
>>>> On Jul 18, 2014, at 3:06 PM, Krzysztof Parzyszek <kparzysz at codeaurora.org> wrote:
>>>> 
>>>>> On 7/18/2014 2:00 PM, kewuzhang wrote:
>>>>>> 
>>>>>> I am working on an intrinsic function, which will write to a pointer argument.
>>>>>> So I am lowering it and think I need to catch it in lowerINTRINSIC_W_CHAIN,  but somehow it always fall into INTRINSIC_WO_CHAIN category.
>>>>>> 
>>>>>> I put [IntrReadwriteArgMem] into my Intrinsic  class definition, it did not help.
>>>>>> tried put [SDNPHasChain] into  intrinsic class definition, cause errors” Element type mismatch for list”.
>>>>>> 
>>>>>> wondering how to flag it  to INTRINSIC_W_CHAIN?
>>>>> 
>>>>> 
>>>>> Does it have chain in the initial DAG?
>>>>> 
>>>>> -Krzysztof
>>>>> 
>>>>> 
>>>>> -- 
>>>>> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
>>>>> _______________________________________________
>>>>> LLVM Developers mailing list
>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>> 
>>>> 
>>>> _______________________________________________
>>>> LLVM Developers mailing list
>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>