1 //===- TestSlicing.cpp - Testing slice functionality ----------------------===// 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 simple testing pass for slicing. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "mlir/Analysis/SliceAnalysis.h" 14 #include "mlir/Dialect/Func/IR/FuncOps.h" 15 #include "mlir/Dialect/Linalg/IR/Linalg.h" 16 #include "mlir/IR/BuiltinOps.h" 17 #include "mlir/IR/IRMapping.h" 18 #include "mlir/IR/PatternMatch.h" 19 #include "mlir/Pass/Pass.h" 20 #include "mlir/Support/LLVM.h" 21 22 using namespace mlir; 23 24 /// Create a function with the same signature as the parent function of `op` 25 /// with name being the function name and a `suffix`. 26 static LogicalResult createBackwardSliceFunction(Operation *op, 27 StringRef suffix) { 28 func::FuncOp parentFuncOp = op->getParentOfType<func::FuncOp>(); 29 OpBuilder builder(parentFuncOp); 30 Location loc = op->getLoc(); 31 std::string clonedFuncOpName = parentFuncOp.getName().str() + suffix.str(); 32 func::FuncOp clonedFuncOp = builder.create<func::FuncOp>( 33 loc, clonedFuncOpName, parentFuncOp.getFunctionType()); 34 IRMapping mapper; 35 builder.setInsertionPointToEnd(clonedFuncOp.addEntryBlock()); 36 for (const auto &arg : enumerate(parentFuncOp.getArguments())) 37 mapper.map(arg.value(), clonedFuncOp.getArgument(arg.index())); 38 SetVector<Operation *> slice; 39 getBackwardSlice(op, &slice); 40 for (Operation *slicedOp : slice) 41 builder.clone(*slicedOp, mapper); 42 builder.create<func::ReturnOp>(loc); 43 return success(); 44 } 45 46 namespace { 47 /// Pass to test slice generated from slice analysis. 48 struct SliceAnalysisTestPass 49 : public PassWrapper<SliceAnalysisTestPass, OperationPass<ModuleOp>> { 50 MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(SliceAnalysisTestPass) 51 52 StringRef getArgument() const final { return "slice-analysis-test"; } 53 StringRef getDescription() const final { 54 return "Test Slice analysis functionality."; 55 } 56 void runOnOperation() override; 57 SliceAnalysisTestPass() = default; 58 SliceAnalysisTestPass(const SliceAnalysisTestPass &) {} 59 }; 60 } // namespace 61 62 void SliceAnalysisTestPass::runOnOperation() { 63 ModuleOp module = getOperation(); 64 auto funcOps = module.getOps<func::FuncOp>(); 65 unsigned opNum = 0; 66 for (auto funcOp : funcOps) { 67 if (!llvm::hasSingleElement(funcOp.getBody())) { 68 funcOp->emitOpError("Does not support functions with multiple blocks"); 69 signalPassFailure(); 70 return; 71 } 72 // TODO: For now this is just looking for Linalg ops. It can be generalized 73 // to look for other ops using flags. 74 funcOp.walk([&](Operation *op) { 75 if (!isa<linalg::LinalgOp>(op)) 76 return WalkResult::advance(); 77 std::string append = 78 std::string("__backward_slice__") + std::to_string(opNum); 79 (void)createBackwardSliceFunction(op, append); 80 opNum++; 81 return WalkResult::advance(); 82 }); 83 } 84 } 85 86 namespace mlir { 87 void registerSliceAnalysisTestPass() { 88 PassRegistration<SliceAnalysisTestPass>(); 89 } 90 } // namespace mlir 91