Fix matrix.h: set_slice3x3 -> set_slice_3x3#1784
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Clang 19 is more strict than Clang 18 about missing members for template instantiations. CUTLASS has already already fixed this in NVIDIA/cutlass#1784, but the XLA fork of CUTLASS is out of date and needs to be patched in order to build GPU kernels with Clang > 19. To test this change, run the following locally: ```sh $ docker run --rm -it \ --name xla \ -v $PWD:/xla \ -w /tmp \ silkeh/clang:19 $ wget https://github.com/bazelbuild/bazelisk/releases/download/v1.25.0/bazelisk-amd64.deb $ dpkg -i bazelisk-amd64.deb $ cd /xla $ ./configure.py \ --backend=CUDA \ --cuda_compiler=CLANG \ --cuda_compute_capabilities=9.0 $ bazel \ build \ --repo_env=HERMETIC_PYTHON_VERSION=3.11 \ --repo_env=HERMETIC_CUDA_VERSION="12.8.0" \ --repo_env=HERMETIC_CUDNN_VERSION="9.7.1" \ --test_output=all \ --spawn_strategy=sandboxed \ //xla/service/gpu/kernels:cutlass_gemm_kernel_f32xf32_to_f32 ```
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Clang 19 is stricter than Clang 18 about missing members for template instantiations. CUTLASS has already fixed this in NVIDIA/cutlass#1784, but the XLA fork of CUTLASS is out of date and needs to be patched in order to build GPU kernels with Clang > 19. To test this change, run the following locally: ```sh $ docker run --rm -it \ --name xla \ -v $PWD:/xla \ -w /tmp \ silkeh/clang:19 $ wget https://github.com/bazelbuild/bazelisk/releases/download/v1.25.0/bazelisk-amd64.deb $ dpkg -i bazelisk-amd64.deb $ cd /xla $ ./configure.py \ --backend=CUDA \ --cuda_compiler=CLANG \ --cuda_compute_capabilities=9.0 $ bazel \ build \ --repo_env=HERMETIC_PYTHON_VERSION=3.11 \ --repo_env=HERMETIC_CUDA_VERSION="12.8.0" \ --repo_env=HERMETIC_CUDNN_VERSION="9.7.1" \ --test_output=all \ --spawn_strategy=sandboxed \ //xla/service/gpu/kernels:cutlass_gemm_kernel_f32xf32_to_f32 ```
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Fix #1783