206fad0e21
This commit marks the type converter in `populate...` functions as `const`. This is useful for debugging. Patterns already take a `const` type converter. However, some `populate...` functions do not only add new patterns, but also add additional type conversion rules. That makes it difficult to find the place where a type conversion was added in the code base. With this change, all `populate...` functions that only populate pattern now have a `const` type converter. Programmers can then conclude from the function signature that these functions do not register any new type conversion rules. Also some minor cleanups around the 1:N dialect conversion infrastructure, which did not always pass the type converter as a `const` object internally.
134 lines
5.5 KiB
C++
134 lines
5.5 KiB
C++
//===- ConvertToSPIRVPass.cpp - MLIR SPIR-V Conversion --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Conversion/ConvertToSPIRV/ConvertToSPIRVPass.h"
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#include "mlir/Conversion/ArithToSPIRV/ArithToSPIRV.h"
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#include "mlir/Conversion/FuncToSPIRV/FuncToSPIRV.h"
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#include "mlir/Conversion/GPUToSPIRV/GPUToSPIRV.h"
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#include "mlir/Conversion/IndexToSPIRV/IndexToSPIRV.h"
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#include "mlir/Conversion/MemRefToSPIRV/MemRefToSPIRV.h"
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#include "mlir/Conversion/SCFToSPIRV/SCFToSPIRV.h"
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#include "mlir/Conversion/UBToSPIRV/UBToSPIRV.h"
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#include "mlir/Conversion/VectorToSPIRV/VectorToSPIRV.h"
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#include "mlir/Dialect/Arith/Transforms/Passes.h"
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#include "mlir/Dialect/GPU/IR/GPUDialect.h"
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#include "mlir/Dialect/SPIRV/IR/SPIRVAttributes.h"
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#include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
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#include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
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#include "mlir/Dialect/Vector/IR/VectorOps.h"
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#include "mlir/Dialect/Vector/Transforms/LoweringPatterns.h"
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#include "mlir/Dialect/Vector/Transforms/VectorRewritePatterns.h"
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#include "mlir/IR/PatternMatch.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Rewrite/FrozenRewritePatternSet.h"
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#include "mlir/Transforms/DialectConversion.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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#include <memory>
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#define DEBUG_TYPE "convert-to-spirv"
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namespace mlir {
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#define GEN_PASS_DEF_CONVERTTOSPIRVPASS
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#include "mlir/Conversion/Passes.h.inc"
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} // namespace mlir
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using namespace mlir;
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namespace {
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/// Map memRef memory space to SPIR-V storage class.
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void mapToMemRef(Operation *op, spirv::TargetEnvAttr &targetAttr) {
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spirv::TargetEnv targetEnv(targetAttr);
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bool targetEnvSupportsKernelCapability =
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targetEnv.allows(spirv::Capability::Kernel);
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spirv::MemorySpaceToStorageClassMap memorySpaceMap =
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targetEnvSupportsKernelCapability
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? spirv::mapMemorySpaceToOpenCLStorageClass
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: spirv::mapMemorySpaceToVulkanStorageClass;
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spirv::MemorySpaceToStorageClassConverter converter(memorySpaceMap);
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spirv::convertMemRefTypesAndAttrs(op, converter);
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}
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/// Populate patterns for each dialect.
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void populateConvertToSPIRVPatterns(const SPIRVTypeConverter &typeConverter,
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ScfToSPIRVContext &scfToSPIRVContext,
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RewritePatternSet &patterns) {
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arith::populateCeilFloorDivExpandOpsPatterns(patterns);
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arith::populateArithToSPIRVPatterns(typeConverter, patterns);
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populateBuiltinFuncToSPIRVPatterns(typeConverter, patterns);
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populateFuncToSPIRVPatterns(typeConverter, patterns);
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populateGPUToSPIRVPatterns(typeConverter, patterns);
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index::populateIndexToSPIRVPatterns(typeConverter, patterns);
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populateMemRefToSPIRVPatterns(typeConverter, patterns);
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populateVectorToSPIRVPatterns(typeConverter, patterns);
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populateSCFToSPIRVPatterns(typeConverter, scfToSPIRVContext, patterns);
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ub::populateUBToSPIRVConversionPatterns(typeConverter, patterns);
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}
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/// A pass to perform the SPIR-V conversion.
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struct ConvertToSPIRVPass final
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: impl::ConvertToSPIRVPassBase<ConvertToSPIRVPass> {
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using ConvertToSPIRVPassBase::ConvertToSPIRVPassBase;
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void runOnOperation() override {
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Operation *op = getOperation();
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MLIRContext *context = &getContext();
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// Unroll vectors in function signatures to native size.
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if (runSignatureConversion && failed(spirv::unrollVectorsInSignatures(op)))
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return signalPassFailure();
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// Unroll vectors in function bodies to native size.
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if (runVectorUnrolling && failed(spirv::unrollVectorsInFuncBodies(op)))
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return signalPassFailure();
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// Generic conversion.
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if (!convertGPUModules) {
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spirv::TargetEnvAttr targetAttr = spirv::lookupTargetEnvOrDefault(op);
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std::unique_ptr<ConversionTarget> target =
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SPIRVConversionTarget::get(targetAttr);
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SPIRVTypeConverter typeConverter(targetAttr);
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RewritePatternSet patterns(context);
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ScfToSPIRVContext scfToSPIRVContext;
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mapToMemRef(op, targetAttr);
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populateConvertToSPIRVPatterns(typeConverter, scfToSPIRVContext,
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patterns);
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if (failed(applyPartialConversion(op, *target, std::move(patterns))))
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return signalPassFailure();
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return;
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}
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// Clone each GPU kernel module for conversion, given that the GPU
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// launch op still needs the original GPU kernel module.
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SmallVector<Operation *, 1> gpuModules;
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OpBuilder builder(context);
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op->walk([&](gpu::GPUModuleOp gpuModule) {
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builder.setInsertionPoint(gpuModule);
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gpuModules.push_back(builder.clone(*gpuModule));
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});
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// Run conversion for each module independently as they can have
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// different TargetEnv attributes.
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for (Operation *gpuModule : gpuModules) {
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spirv::TargetEnvAttr targetAttr =
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spirv::lookupTargetEnvOrDefault(gpuModule);
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std::unique_ptr<ConversionTarget> target =
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SPIRVConversionTarget::get(targetAttr);
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SPIRVTypeConverter typeConverter(targetAttr);
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RewritePatternSet patterns(context);
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ScfToSPIRVContext scfToSPIRVContext;
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mapToMemRef(gpuModule, targetAttr);
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populateConvertToSPIRVPatterns(typeConverter, scfToSPIRVContext,
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patterns);
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if (failed(applyFullConversion(gpuModule, *target, std::move(patterns))))
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return signalPassFailure();
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}
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}
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};
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} // namespace
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