1 //===- TestAvailability.cpp - Test pass for setting Entry point ABI info --===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements a pass that sets the spv.entry_point_abi attribute on
10 // functions that are to be lowered as entry point functions.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "mlir/Dialect/GPU/GPUDialect.h"
15 #include "mlir/Dialect/SPIRV/SPIRVDialect.h"
16 #include "mlir/Dialect/SPIRV/TargetAndABI.h"
17 #include "mlir/Pass/Pass.h"
18 
19 using namespace mlir;
20 
21 namespace {
22 /// Pass to set the spv.entry_point_abi
23 class TestSpirvEntryPointABIPass
24     : public PassWrapper<TestSpirvEntryPointABIPass,
25                          OperationPass<gpu::GPUModuleOp>> {
26 public:
27   TestSpirvEntryPointABIPass() = default;
28   TestSpirvEntryPointABIPass(const TestSpirvEntryPointABIPass &) {}
29   void runOnOperation() override;
30 
31 private:
32   Pass::ListOption<int32_t> workgroupSize{
33       *this, "workgroup-size",
34       llvm::cl::desc(
35           "Workgroup size to use for all gpu.func kernels in the module, "
36           "specified with x-dimension first, y-dimension next and z-dimension "
37           "last. Unspecified dimensions will be set to 1"),
38       llvm::cl::ZeroOrMore, llvm::cl::MiscFlags::CommaSeparated};
39 };
40 } // namespace
41 
42 void TestSpirvEntryPointABIPass::runOnOperation() {
43   gpu::GPUModuleOp gpuModule = getOperation();
44   MLIRContext *context = &getContext();
45   StringRef attrName = spirv::getEntryPointABIAttrName();
46   for (gpu::GPUFuncOp gpuFunc : gpuModule.getOps<gpu::GPUFuncOp>()) {
47     if (!gpu::GPUDialect::isKernel(gpuFunc) || gpuFunc.getAttr(attrName))
48       continue;
49     SmallVector<int32_t, 3> workgroupSizeVec(workgroupSize.begin(),
50                                              workgroupSize.end());
51     workgroupSizeVec.resize(3, 1);
52     gpuFunc.setAttr(attrName,
53                     spirv::getEntryPointABIAttr(workgroupSizeVec, context));
54   }
55 }
56 
57 namespace mlir {
58 void registerTestSpirvEntryPointABIPass() {
59   PassRegistration<TestSpirvEntryPointABIPass> registration(
60       "test-spirv-entry-point-abi",
61       "Set the spv.entry_point_abi attribute on GPU kernel function within the "
62       "module, intended for testing only");
63 }
64 } // namespace mlir
65