1 //===- LinalgToLLVM.cpp - conversion from Linalg to LLVM dialect ----------===//
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 #include "mlir/Conversion/LinalgToLLVM/LinalgToLLVM.h"
10 
11 #include "../PassDetail.h"
12 #include "mlir/Conversion/AffineToStandard/AffineToStandard.h"
13 #include "mlir/Conversion/LLVMCommon/ConversionTarget.h"
14 #include "mlir/Conversion/LLVMCommon/Pattern.h"
15 #include "mlir/Conversion/LLVMCommon/TypeConverter.h"
16 #include "mlir/Conversion/MemRefToLLVM/MemRefToLLVM.h"
17 #include "mlir/Conversion/SCFToControlFlow/SCFToControlFlow.h"
18 #include "mlir/Conversion/VectorToLLVM/ConvertVectorToLLVM.h"
19 #include "mlir/Conversion/VectorToSCF/VectorToSCF.h"
20 #include "mlir/Dialect/LLVMIR/LLVMDialect.h"
21 #include "mlir/Dialect/Linalg/IR/Linalg.h"
22 #include "mlir/Dialect/Linalg/Passes.h"
23 #include "mlir/Dialect/SCF/SCF.h"
24 #include "mlir/IR/AffineExpr.h"
25 #include "mlir/IR/AffineMap.h"
26 #include "mlir/IR/Attributes.h"
27 #include "mlir/IR/Builders.h"
28 #include "mlir/IR/BuiltinOps.h"
29 #include "mlir/IR/BuiltinTypes.h"
30 #include "mlir/IR/MLIRContext.h"
31 #include "mlir/IR/Operation.h"
32 #include "mlir/IR/PatternMatch.h"
33 #include "mlir/IR/Types.h"
34 #include "mlir/Support/LogicalResult.h"
35 #include "mlir/Transforms/DialectConversion.h"
36 #include "mlir/Transforms/Passes.h"
37 #include "llvm/ADT/SetVector.h"
38 #include "llvm/IR/DerivedTypes.h"
39 #include "llvm/IR/Module.h"
40 #include "llvm/IR/Type.h"
41 #include "llvm/Support/Allocator.h"
42 #include "llvm/Support/ErrorHandling.h"
43 
44 using namespace mlir;
45 using namespace mlir::LLVM;
46 using namespace mlir::linalg;
47 
48 template <typename T>
49 static Type getPtrToElementType(T containerType, LLVMTypeConverter &lowering) {
50   return LLVMPointerType::get(
51       lowering.convertType(containerType.getElementType()));
52 }
53 
54 namespace {
55 // YieldOp produces and LLVM::ReturnOp.
56 class YieldOpConversion : public ConvertOpToLLVMPattern<linalg::YieldOp> {
57 public:
58   using ConvertOpToLLVMPattern<linalg::YieldOp>::ConvertOpToLLVMPattern;
59 
60   LogicalResult
61   matchAndRewrite(linalg::YieldOp op, OpAdaptor adaptor,
62                   ConversionPatternRewriter &rewriter) const override {
63     rewriter.replaceOpWithNewOp<LLVM::ReturnOp>(op, adaptor.getOperands());
64     return success();
65   }
66 };
67 } // namespace
68 
69 /// Populate the given list with patterns that convert from Linalg to LLVM.
70 void mlir::populateLinalgToLLVMConversionPatterns(LLVMTypeConverter &converter,
71                                                   RewritePatternSet &patterns) {
72   patterns.add<YieldOpConversion>(converter);
73 }
74 
75 namespace {
76 struct ConvertLinalgToLLVMPass
77     : public ConvertLinalgToLLVMBase<ConvertLinalgToLLVMPass> {
78   void runOnOperation() override;
79 };
80 } // namespace
81 
82 void ConvertLinalgToLLVMPass::runOnOperation() {
83   auto module = getOperation();
84 
85   // Convert to the LLVM IR dialect using the converter defined above.
86   RewritePatternSet patterns(&getContext());
87   LLVMTypeConverter converter(&getContext());
88   populateLinalgToLLVMConversionPatterns(converter, patterns);
89   populateMemRefToLLVMConversionPatterns(converter, patterns);
90 
91   LLVMConversionTarget target(getContext());
92   target.addLegalOp<ModuleOp>();
93   if (failed(applyPartialConversion(module, target, std::move(patterns))))
94     signalPassFailure();
95 }
96 
97 std::unique_ptr<OperationPass<ModuleOp>> mlir::createConvertLinalgToLLVMPass() {
98   return std::make_unique<ConvertLinalgToLLVMPass>();
99 }
100