https://github.com/jwanggit86 closed
https://github.com/llvm/llvm-project/pull/75647
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krzysz00 wrote:
Good to know that other targets have that sort of "how many work groups will be
launched" information. Having that be a min/max (either per dimension or in
total or both) may be the right approach here, and this could be a good excuse
for the unification being talked about.
bader wrote:
> How does this attribute relate to `reqd_work_group_size` and related existing
> attributes?
They seems to be different/"unrelated". Based on the description of the
`amdgpu-num-work-groups` attribute it provides "number of work-groups", whereas
`reqd_work_group_size` provides
krzysz00 wrote:
I'd go with Matt's point: close this, and then add metadata for required launch
grid sizes. Then you can update `AMDGPULowerKernelAttributes` to use said
metadata.
https://github.com/llvm/llvm-project/pull/75647
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jwanggit86 wrote:
@krzysz00 So how do you want to proceed?
https://github.com/llvm/llvm-project/pull/75647
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arsenm wrote:
ping @krzysz00
https://github.com/llvm/llvm-project/pull/75647
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jwanggit86 wrote:
Two possible optimizations mentioned by the requester are,
"1. This'll let the backend know the maximum size of the workgroup ID, and so
we can do things like infer nsw or the ability to use a 16-bit add or so on
2. This could be used to optimize global sync stuff in the
llvmbot wrote:
@llvm/pr-subscribers-backend-amdgpu
Author: Jun Wang (jwanggit86)
Changes
A new function attribute named amdgpu-num-work-groups is added. This attribute
allows programmers to let the compiler know the number of workgroups to be
launched and do optimizations based on that
https://github.com/jwanggit86 created
https://github.com/llvm/llvm-project/pull/75647
A new function attribute named amdgpu-num-work-groups is added. This attribute
allows programmers to let the compiler know the number of workgroups to be
launched and do optimizations based on that
