6af2c4ca9b
This will allow for caching pattern lists across multiple pass instances, such as when multithreading. This is an extremely important invariant for PDL patterns, which are compiled at runtime when the FrozenRewritePatternList is built. Differential Revision: https://reviews.llvm.org/D93146
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
//===- FrozenRewritePatternList.cpp - Frozen Pattern List -------*- C++ -*-===//
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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/Rewrite/FrozenRewritePatternList.h"
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#include "ByteCode.h"
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#include "mlir/Conversion/PDLToPDLInterp/PDLToPDLInterp.h"
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#include "mlir/Dialect/PDL/IR/PDL.h"
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#include "mlir/Interfaces/SideEffectInterfaces.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Pass/PassManager.h"
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using namespace mlir;
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static LogicalResult convertPDLToPDLInterp(ModuleOp pdlModule) {
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// Skip the conversion if the module doesn't contain pdl.
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if (llvm::empty(pdlModule.getOps<pdl::PatternOp>()))
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return success();
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// Simplify the provided PDL module. Note that we can't use the canonicalizer
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// here because it would create a cyclic dependency.
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auto simplifyFn = [](Operation *op) {
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// TODO: Add folding here if ever necessary.
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if (isOpTriviallyDead(op))
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op->erase();
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};
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pdlModule.getBody()->walk(simplifyFn);
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/// Lower the PDL pattern module to the interpreter dialect.
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PassManager pdlPipeline(pdlModule.getContext());
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#ifdef NDEBUG
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// We don't want to incur the hit of running the verifier when in release
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// mode.
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pdlPipeline.enableVerifier(false);
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#endif
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pdlPipeline.addPass(createPDLToPDLInterpPass());
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if (failed(pdlPipeline.run(pdlModule)))
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return failure();
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// Simplify again after running the lowering pipeline.
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pdlModule.getBody()->walk(simplifyFn);
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return success();
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}
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//===----------------------------------------------------------------------===//
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// FrozenRewritePatternList
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//===----------------------------------------------------------------------===//
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FrozenRewritePatternList::FrozenRewritePatternList()
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: impl(std::make_shared<Impl>()) {}
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FrozenRewritePatternList::FrozenRewritePatternList(
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OwningRewritePatternList &&patterns)
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: impl(std::make_shared<Impl>()) {
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impl->nativePatterns = std::move(patterns.getNativePatterns());
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// Generate the bytecode for the PDL patterns if any were provided.
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PDLPatternModule &pdlPatterns = patterns.getPDLPatterns();
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ModuleOp pdlModule = pdlPatterns.getModule();
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if (!pdlModule)
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return;
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if (failed(convertPDLToPDLInterp(pdlModule)))
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llvm::report_fatal_error(
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"failed to lower PDL pattern module to the PDL Interpreter");
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// Generate the pdl bytecode.
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impl->pdlByteCode = std::make_unique<detail::PDLByteCode>(
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pdlModule, pdlPatterns.takeConstraintFunctions(),
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pdlPatterns.takeCreateFunctions(), pdlPatterns.takeRewriteFunctions());
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}
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FrozenRewritePatternList::~FrozenRewritePatternList() {}
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