[LLVMdev] Vararg Intrinsics still supported?

Marcello Maggioni marcello at codeplay.com
Fri May 17 03:06:36 PDT 2013

Well, that explains why I found almost zero information about this 
online :D The source of my confusion was that I found some strange 
forum/posts of people talking about that googling , and I wrongly 
assumed llvm supported something like that at some point in time ...


On 17/05/13 08:46, Duncan Sands wrote:
> Hi Marcello,
>> I checked around examples for vararg intrinsics, but seems like no 
>> target or
>> other parts in LLVM use intrinsics with llvm_vararg_ty as an input 
>> and adding
>> such an intrinsics gives me a compiler error saying "unhandled MVT in 
>> intrinsics!".
>> Are these kind of intrinsics still supported into LLVM?
> LLVM never supported varargs intrinsics, i.e. it never supported 
> things like
>   llvm.wonder_intrinsic(...)
> What is does support is intrinsic overloading, where you can have a 
> version
> of wonder_intrinsic that takes a float argument, another that takes an 
> i32
> argument etc.  It does this by giving each such version of the 
> intrinsic a
> different name, by appending the type to the name.
> Ciao, Duncan.
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