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//===---- Query.cpp - -----------------------------------------------------===//
//
// 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/Query/Query.h"
#include "QueryParser.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/IR/IRMapping.h"
#include "mlir/IR/Verifier.h"
#include "mlir/Query/Matcher/MatchFinder.h"
#include "mlir/Query/QuerySession.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
namespace mlir::query {
QueryRef parse(llvm::StringRef line, const QuerySession &qs) {
return QueryParser::parse(line, qs);
}
std::vector<llvm::LineEditor::Completion>
complete(llvm::StringRef line, size_t pos, const QuerySession &qs) {
return QueryParser::complete(line, pos, qs);
}
// TODO: Extract into a helper function that can be reused outside query
// context.
static Operation *extractFunction(std::vector<Operation *> &ops,
MLIRContext *context,
llvm::StringRef functionName) {
context->loadDialect<func::FuncDialect>();
OpBuilder builder(context);
// Collect data for function creation
std::vector<Operation *> slice;
std::vector<Value> values;
std::vector<Type> outputTypes;
for (auto *op : ops) {
// Return op's operands are propagated, but the op itself isn't needed.
if (!isa<func::ReturnOp>(op))
slice.push_back(op);
// All results are returned by the extracted function.
llvm::append_range(outputTypes, op->getResults().getTypes());
// Track all values that need to be taken as input to function.
llvm::append_range(values, op->getOperands());
}
// Create the function
FunctionType funcType =
builder.getFunctionType(TypeRange(ValueRange(values)), outputTypes);
auto loc = builder.getUnknownLoc();
func::FuncOp funcOp = func::FuncOp::create(loc, functionName, funcType);
builder.setInsertionPointToEnd(funcOp.addEntryBlock());
// Map original values to function arguments
IRMapping mapper;
for (const auto &arg : llvm::enumerate(values))
mapper.map(arg.value(), funcOp.getArgument(arg.index()));
// Clone operations and build function body
std::vector<Operation *> clonedOps;
std::vector<Value> clonedVals;
// TODO: Handle extraction of operations with compute payloads defined via
// regions.
for (Operation *slicedOp : slice) {
Operation *clonedOp =
clonedOps.emplace_back(builder.clone(*slicedOp, mapper));
clonedVals.insert(clonedVals.end(), clonedOp->result_begin(),
clonedOp->result_end());
}
// Add return operation
func::ReturnOp::create(builder, loc, clonedVals);
// Remove unused function arguments
size_t currentIndex = 0;
while (currentIndex < funcOp.getNumArguments()) {
// Erase if possible.
if (funcOp.getArgument(currentIndex).use_empty())
if (succeeded(funcOp.eraseArgument(currentIndex)))
continue;
++currentIndex;
}
return funcOp;
}
Query::~Query() = default;
LogicalResult InvalidQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
os << errStr << "\n";
return mlir::failure();
}
LogicalResult NoOpQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
return mlir::success();
}
LogicalResult HelpQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
os << "Available commands:\n\n"
" match MATCHER, m MATCHER "
"Match the mlir against the given matcher.\n"
" quit "
"Terminates the query session.\n\n";
return mlir::success();
}
LogicalResult QuitQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
qs.terminate = true;
return mlir::success();
}
LogicalResult MatchQuery::run(llvm::raw_ostream &os, QuerySession &qs) const {
Operation *rootOp = qs.getRootOp();
int matchCount = 0;
matcher::MatchFinder finder;
auto matches = finder.collectMatches(rootOp, std::move(matcher));
// An extract call is recognized by considering if the matcher has a name.
// TODO: Consider making the extract more explicit.
if (matcher.hasFunctionName()) {
auto functionName = matcher.getFunctionName();
std::vector<Operation *> flattenedMatches =
finder.flattenMatchedOps(matches);
Operation *function =
extractFunction(flattenedMatches, rootOp->getContext(), functionName);
if (failed(verify(function)))
return mlir::failure();
os << "\n" << *function << "\n\n";
function->erase();
return mlir::success();
}
os << "\n";
for (auto &results : matches) {
os << "Match #" << ++matchCount << ":\n\n";
for (auto op : results.matchedOps) {
if (op == results.rootOp) {
finder.printMatch(os, qs, op, "root");
} else {
finder.printMatch(os, qs, op);
}
}
}
os << matchCount << (matchCount == 1 ? " match.\n\n" : " matches.\n\n");
return mlir::success();
}
} // namespace mlir::query
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