[Mlir-commits] [mlir] [MLIR][Conversion] Add new option "use-opencl" for "convert-gpu-to-spirv" conversion pass (PR #66445)

[Jakub Kuderski]

================
@@ -0,0 +1,81 @@
+// RUN: mlir-opt -convert-gpu-to-spirv='use-64bit-index=true use-opencl=true' %s -o - | FileCheck %s
+
+module attributes {
+  gpu.container_module,
+  spirv.target_env = #spirv.target_env<
+    #spirv.vce<v1.0, [Kernel, Int64, Addresses], []>, api=OpenCL, #spirv.resource_limits<>>
+} {
+  func.func @load_store(%arg0: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg1: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg2: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>) {
+    %c0 = arith.constant 0 : index
+    %c12 = arith.constant 12 : index
+    %0 = arith.subi %c12, %c0 : index
+    %c1 = arith.constant 1 : index
+    %c0_0 = arith.constant 0 : index
+    %c4 = arith.constant 4 : index
+    %1 = arith.subi %c4, %c0_0 : index
+    %c1_1 = arith.constant 1 : index
+    %c1_2 = arith.constant 1 : index
+    gpu.launch_func @kernels::@load_store_kernel
+        blocks in (%0, %c1_2, %c1_2) threads in (%1, %c1_2, %c1_2)
+        args(%arg0 : memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg1 : memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg2 : memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>,
+             %c0 : index, %c0_0 : index, %c1 : index, %c1_1 : index)
+    return
+  }
+
+  // CHECK-LABEL: spirv.module @{{.*}} Physical64 OpenCL
+  gpu.module @kernels {
+    // CHECK-DAG: spirv.GlobalVariable @[[WORKGROUPSIZEVAR:.*]] built_in("WorkgroupSize") : !spirv.ptr<vector<3xi64>, Input>
+    // CHECK-DAG: spirv.GlobalVariable @[[NUMWORKGROUPSVAR:.*]] built_in("NumWorkgroups") : !spirv.ptr<vector<3xi64>, Input>
+    // CHECK-DAG: spirv.GlobalVariable @[[$LOCALINVOCATIONIDVAR:.*]] built_in("LocalInvocationId") : !spirv.ptr<vector<3xi64>, Input>
+    // CHECK-DAG: spirv.GlobalVariable @[[$WORKGROUPIDVAR:.*]] built_in("WorkgroupId") : !spirv.ptr<vector<3xi64>, Input>
+    // CHECK-LABEL:    spirv.func @load_store_kernel
+    // CHECK-SAME: %[[ARG0:[^\s]+]]: !spirv.ptr<!spirv.array<48 x f32>, CrossWorkgroup>
+    // CHECK-SAME: %[[ARG1:[^\s]+]]: !spirv.ptr<!spirv.array<48 x f32>, CrossWorkgroup>
+    // CHECK-SAME: %[[ARG2:[^\s]+]]: !spirv.ptr<!spirv.array<48 x f32>, CrossWorkgroup>
+    gpu.func @load_store_kernel(%arg0: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg1: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg2: memref<12x4xf32, #spirv.storage_class<CrossWorkgroup>>, %arg3: index, %arg4: index, %arg5: index, %arg6: index) kernel
+      attributes {gpu.known_block_size = array<i32: 1, 1, 1>, gpu.known_grid_size = array<i32: 16, 1, 1>, spirv.entry_point_abi = #spirv.entry_point_abi<>} {
+      // CHECK: %[[ADDRESSWORKGROUPID:.*]] = spirv.mlir.addressof @[[$WORKGROUPIDVAR]]
+      // CHECK: %[[WORKGROUPID:.*]] = spirv.Load "Input" %[[ADDRESSWORKGROUPID]]
+      // CHECK: %[[WORKGROUPIDX:.*]] = spirv.CompositeExtract %[[WORKGROUPID]]{{\[}}0 : i32{{\]}}
+      // CHECK: %[[ADDRESSLOCALINVOCATIONID:.*]] = spirv.mlir.addressof @[[$LOCALINVOCATIONIDVAR]]
+      // CHECK: %[[LOCALINVOCATIONID:.*]] = spirv.Load "Input" %[[ADDRESSLOCALINVOCATIONID]]
+      // CHECK: %[[LOCALINVOCATIONIDX:.*]] = spirv.CompositeExtract %[[LOCALINVOCATIONID]]{{\[}}0 : i32{{\]}}
+      %0 = gpu.block_id x
+      %1 = gpu.block_id y
+      %2 = gpu.block_id z
+      %3 = gpu.thread_id x
+      %4 = gpu.thread_id y
+      %5 = gpu.thread_id z
+      %6 = gpu.grid_dim x
+      %7 = gpu.grid_dim y
+      %8 = gpu.grid_dim z
+      %9 = gpu.block_dim x
+      %10 = gpu.block_dim y
+      %11 = gpu.block_dim z
+      // CHECK: %[[INDEX1:.*]] = spirv.IAdd
+      %12 = arith.addi %arg3, %0 : index
+      // CHECK: %[[INDEX2:.*]] = spirv.IAdd
+      %13 = arith.addi %arg4, %3 : index
+      // CHECK: %[[OFFSET1_0:.*]] = spirv.Constant 0 : i64
+      // CHECK: %[[STRIDE1_1:.*]] = spirv.Constant 4 : i64
+      // CHECK: %[[UPDATE1_1:.*]] = spirv.IMul %[[STRIDE1_1]], %[[INDEX1]] : i64
+      // CHECK: %[[OFFSET1_1:.*]] = spirv.IAdd %[[OFFSET1_0]], %[[UPDATE1_1]] : i64
+      // CHECK: %[[STRIDE1_2:.*]] = spirv.Constant 1 : i64
+      // CHECK: %[[UPDATE1_2:.*]] = spirv.IMul %[[STRIDE1_2]], %[[INDEX2]] : i64
+      // CHECK: %[[OFFSET1_2:.*]] = spirv.IAdd %[[OFFSET1_1]], %[[UPDATE1_2]] : i64
----------------
kuhar wrote:

Do we care about the exact offset? This check sequence seems verbose and maybe even fragile (assumes exact order of constants and may be broken by unrelated changes in the lowering patterns).

https://github.com/llvm/llvm-project/pull/66445