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[MatMul] Prolog build out, adding automatic swizzle generator for a few tile sizes #1900
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…o matmul_swizzle_gen
…o matmul_swizzle_gen
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Mar 21, 2023
When working on csarofeen/pytorch#1900, I find that sometimes expr simplifier will assign the dtype of a value wrongly. This is because expr simplifier is written loosely assuming the dtypes of all `Val`s are the same. However, because we are putting pointer types into the expression, we need to be more careful, otherwise we will get wrong kernel code like: ``` __half* ptr1 = threadIdx.x * 128; __half* ptr2 = ptr1 + 256 + T1.data; ``` This PR changes all passes in the expr simplifier to let it infer dtype from its inputs. - [x] TODO: update all the failing `assertCUDAKernel` tests😵💫😵💫😵💫😵💫
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This PR tries to build out matmul CTA tiling support, prioritizing Ampere ones at the moment.
Also in this PR is an inline bank conflict check utility that reports bank conflict on shared memory accesses.
Remaining TODO: