1 //===- MemRefToSPIRVPass.cpp - MemRef to SPIR-V Passes ----------------===//
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 to convert standard dialect to SPIR-V dialect.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "mlir/Conversion/MemRefToSPIRV/MemRefToSPIRVPass.h"
14 #include "../PassDetail.h"
15 #include "mlir/Conversion/MemRefToSPIRV/MemRefToSPIRV.h"
16 #include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
17 #include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
18 
19 using namespace mlir;
20 
21 namespace {
22 /// A pass converting MLIR MemRef operations into the SPIR-V dialect.
23 class ConvertMemRefToSPIRVPass
24     : public ConvertMemRefToSPIRVBase<ConvertMemRefToSPIRVPass> {
25   void runOnOperation() override;
26 };
27 } // namespace
28 
29 void ConvertMemRefToSPIRVPass::runOnOperation() {
30   MLIRContext *context = &getContext();
31   ModuleOp module = getOperation();
32 
33   auto targetAttr = spirv::lookupTargetEnvOrDefault(module);
34   std::unique_ptr<ConversionTarget> target =
35       SPIRVConversionTarget::get(targetAttr);
36 
37   SPIRVTypeConverter::Options options;
38   options.boolNumBits = this->boolNumBits;
39   SPIRVTypeConverter typeConverter(targetAttr, options);
40 
41   // Use UnrealizedConversionCast as the bridge so that we don't need to pull in
42   // patterns for other dialects.
43   auto addUnrealizedCast = [](OpBuilder &builder, Type type, ValueRange inputs,
44                               Location loc) {
45     auto cast = builder.create<UnrealizedConversionCastOp>(loc, type, inputs);
46     return Optional<Value>(cast.getResult(0));
47   };
48   typeConverter.addSourceMaterialization(addUnrealizedCast);
49   typeConverter.addTargetMaterialization(addUnrealizedCast);
50   target->addLegalOp<UnrealizedConversionCastOp>();
51 
52   RewritePatternSet patterns(context);
53   populateMemRefToSPIRVPatterns(typeConverter, patterns);
54 
55   if (failed(applyPartialConversion(module, *target, std::move(patterns))))
56     return signalPassFailure();
57 }
58 
59 std::unique_ptr<OperationPass<ModuleOp>>
60 mlir::createConvertMemRefToSPIRVPass() {
61   return std::make_unique<ConvertMemRefToSPIRVPass>();
62 }
63