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//===- FrozenRewritePatternSet.cpp - Frozen Pattern List -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/Rewrite/FrozenRewritePatternSet.h"
#include "ByteCode.h"
#include "mlir/Conversion/PDLToPDLInterp/PDLToPDLInterp.h"
#include "mlir/Dialect/PDL/IR/PDLOps.h"
#include "mlir/Interfaces/SideEffectInterfaces.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Pass/PassManager.h"
using namespace mlir;
static LogicalResult convertPDLToPDLInterp(ModuleOp pdlModule) {
// Skip the conversion if the module doesn't contain pdl.
if (llvm::empty(pdlModule.getOps<pdl::PatternOp>()))
return success();
// Simplify the provided PDL module. Note that we can't use the canonicalizer
// here because it would create a cyclic dependency.
auto simplifyFn = [](Operation *op) {
// TODO: Add folding here if ever necessary.
if (isOpTriviallyDead(op))
op->erase();
};
pdlModule.getBody()->walk(simplifyFn);
/// Lower the PDL pattern module to the interpreter dialect.
PassManager pdlPipeline(pdlModule.getContext());
#ifdef NDEBUG
// We don't want to incur the hit of running the verifier when in release
// mode.
pdlPipeline.enableVerifier(false);
#endif
pdlPipeline.addPass(createPDLToPDLInterpPass());
if (failed(pdlPipeline.run(pdlModule)))
return failure();
// Simplify again after running the lowering pipeline.
pdlModule.getBody()->walk(simplifyFn);
return success();
}
//===----------------------------------------------------------------------===//
// FrozenRewritePatternSet
//===----------------------------------------------------------------------===//
FrozenRewritePatternSet::FrozenRewritePatternSet()
: impl(std::make_shared<Impl>()) {}
FrozenRewritePatternSet::FrozenRewritePatternSet(RewritePatternSet &&patterns)
: impl(std::make_shared<Impl>()) {
impl->nativePatterns = std::move(patterns.getNativePatterns());
// Generate the bytecode for the PDL patterns if any were provided.
PDLPatternModule &pdlPatterns = patterns.getPDLPatterns();
ModuleOp pdlModule = pdlPatterns.getModule();
if (!pdlModule)
return;
if (failed(convertPDLToPDLInterp(pdlModule)))
llvm::report_fatal_error(
"failed to lower PDL pattern module to the PDL Interpreter");
// Generate the pdl bytecode.
impl->pdlByteCode = std::make_unique<detail::PDLByteCode>(
pdlModule, pdlPatterns.takeConstraintFunctions(),
pdlPatterns.takeRewriteFunctions());
}
FrozenRewritePatternSet::~FrozenRewritePatternSet() {}
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