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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"
#include <optional>
using namespace mlir;
static LogicalResult
convertPDLToPDLInterp(ModuleOp pdlModule,
DenseMap<Operation *, PDLPatternConfigSet *> &configMap) {
// Skip the conversion if the module doesn't contain pdl.
if (pdlModule.getOps<pdl::PatternOp>().empty())
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->getName());
#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(configMap));
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, ArrayRef<std::string> disabledPatternLabels,
ArrayRef<std::string> enabledPatternLabels)
: impl(std::make_shared<Impl>()) {
DenseSet<StringRef> disabledPatterns, enabledPatterns;
disabledPatterns.insert(disabledPatternLabels.begin(),
disabledPatternLabels.end());
enabledPatterns.insert(enabledPatternLabels.begin(),
enabledPatternLabels.end());
// Functor used to walk all of the operations registered in the context. This
// is useful for patterns that get applied to multiple operations, such as
// interface and trait based patterns.
std::vector<RegisteredOperationName> opInfos;
auto addToOpsWhen =
[&](std::unique_ptr<RewritePattern> &pattern,
function_ref<bool(RegisteredOperationName)> callbackFn) {
if (opInfos.empty())
opInfos = pattern->getContext()->getRegisteredOperations();
for (RegisteredOperationName info : opInfos)
if (callbackFn(info))
impl->nativeOpSpecificPatternMap[info].push_back(pattern.get());
impl->nativeOpSpecificPatternList.push_back(std::move(pattern));
};
for (std::unique_ptr<RewritePattern> &pat : patterns.getNativePatterns()) {
// Don't add patterns that haven't been enabled by the user.
if (!enabledPatterns.empty()) {
auto isEnabledFn = [&](StringRef label) {
return enabledPatterns.count(label);
};
if (!isEnabledFn(pat->getDebugName()) &&
llvm::none_of(pat->getDebugLabels(), isEnabledFn))
continue;
}
// Don't add patterns that have been disabled by the user.
if (!disabledPatterns.empty()) {
auto isDisabledFn = [&](StringRef label) {
return disabledPatterns.count(label);
};
if (isDisabledFn(pat->getDebugName()) ||
llvm::any_of(pat->getDebugLabels(), isDisabledFn))
continue;
}
if (std::optional<OperationName> rootName = pat->getRootKind()) {
impl->nativeOpSpecificPatternMap[*rootName].push_back(pat.get());
impl->nativeOpSpecificPatternList.push_back(std::move(pat));
continue;
}
if (std::optional<TypeID> interfaceID = pat->getRootInterfaceID()) {
addToOpsWhen(pat, [&](RegisteredOperationName info) {
return info.hasInterface(*interfaceID);
});
continue;
}
if (std::optional<TypeID> traitID = pat->getRootTraitID()) {
addToOpsWhen(pat, [&](RegisteredOperationName info) {
return info.hasTrait(*traitID);
});
continue;
}
impl->nativeAnyOpPatterns.push_back(std::move(pat));
}
// Generate the bytecode for the PDL patterns if any were provided.
PDLPatternModule &pdlPatterns = patterns.getPDLPatterns();
ModuleOp pdlModule = pdlPatterns.getModule();
if (!pdlModule)
return;
DenseMap<Operation *, PDLPatternConfigSet *> configMap =
pdlPatterns.takeConfigMap();
if (failed(convertPDLToPDLInterp(pdlModule, configMap)))
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.takeConfigs(), configMap,
pdlPatterns.takeConstraintFunctions(),
pdlPatterns.takeRewriteFunctions());
}
FrozenRewritePatternSet::~FrozenRewritePatternSet() = default;
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