[llvm-dev] Is every intrinsic norecurse?

Hal Finkel via llvm-dev llvm-dev at lists.llvm.org
Sun Jun 4 19:16:58 PDT 2017

On 06/04/2017 05:29 PM, Piotr Padlewski wrote:
> Hi folks,
> I've been measuring some devirtualization statistics and I found that 
> when barriers are introduced, the number of functions marked as 
> norecurse is lower.
> The llvm.group.barrier is obviously norecursive and I've been 
> thinking: is every intrinsic norecurse?
> I think it make sense to mark all of the intrinsics that can be 
> considered as norecursive this way, so it won't gonna stop the 
> optimizer marking functions as norecurse.

I'm not sure that it is a universal property of all intrinsics, strictly 
speaking. patchpoints, for example, might recurse? It is certainly true 
for most of them.


> Best
> Piotr

Hal Finkel
Lead, Compiler Technology and Programming Languages
Leadership Computing Facility
Argonne National Laboratory

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