[Codegen] Metal codegen on Linux (#1857)

testing/python/metal/test_metal_codegen_linux.py

@@ -0,0 +1,72 @@
+"""Test Metal code generation on any platform (including Linux).
+
+These tests verify that TileLang can compile kernels down to Metal shader
+source code without requiring a Metal runtime or macOS.
+"""
+
+import tilelang
+from tilelang import tvm as tvm
+import tilelang.testing
+import tilelang.language as T
+
+
+def matmul(M, N, K, block_M, block_N, block_K, dtype=T.float32, accum_dtype=T.float32):
+    @T.prim_func
+    def main(
+        A: T.Tensor((M, K), dtype),
+        B: T.Tensor((K, N), dtype),
+        C: T.Tensor((M, N), dtype),
+    ):
+        with T.Kernel(T.ceildiv(N, block_N), T.ceildiv(M, block_M), threads=128) as (bx, by):
+            A_shared = T.alloc_shared((block_M, block_K), dtype, scope="shared")
+            B_shared = T.alloc_shared((block_K, block_N), dtype, scope="shared")
+            C_local = T.alloc_fragment((block_M, block_N), accum_dtype)
+
+            T.clear(C_local)
+
+            for ko in T.Pipelined(T.ceildiv(K, block_K), num_stages=0):
+                T.copy(A[by * block_M, ko * block_K], A_shared, coalesced_width=2)
+                T.copy(B[ko * block_K, bx * block_N], B_shared, coalesced_width=2)
+
+                for i, j in T.Parallel(block_M, block_N):
+                    for k in T.Serial(block_K):
+                        C_local[i, j] += A_shared[i, k] * B_shared[k, j]
+
+            T.copy(C_local, C[by * block_M, bx * block_N], coalesced_width=2)
+
+    return main
+
+
+def assert_metal_codegen(
+    M,
+    N,
+    K,
+    block_M,
+    block_N,
+    block_K,
+    dtype=T.float32,
+    accum_dtype=T.float32,
+):
+    func = matmul(M, N, K, block_M, block_N, block_K, dtype=dtype, accum_dtype=accum_dtype)
+    with tvm.transform.PassContext(), tvm.target.Target("metal"):
+        artifact = tilelang.lower(func, target="metal")
+
+    src_code = artifact.kernel_source
+    assert src_code is not None
+    assert "metal" in src_code or "kernel void" in src_code
+
+
+def test_metal_codegen_float32():
+    assert_metal_codegen(1024, 1024, 1024, 16, 16, 16)
+
+
+def test_metal_codegen_float16():
+    assert_metal_codegen(1024, 1024, 1024, 16, 16, 16, dtype=T.float16)
+
+
+def test_metal_codegen_int32():
+    assert_metal_codegen(1024, 1024, 1024, 16, 16, 16, dtype=T.int32)
+
+
+if __name__ == "__main__":
+    tilelang.testing.main()