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//===- TestInlining.cpp - Pass to inline calls in the test dialect --------===//
//
// Copyright 2019 The MLIR Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// =============================================================================
//
// TODO(riverriddle) This pass is only necessary because the main inlining pass
// has no abstracted away the call+callee relationship. When the inlining
// interface has this support, this pass should be removed.
//
//===----------------------------------------------------------------------===//
#include "TestDialect.h"
#include "mlir/Dialect/StandardOps/Ops.h"
#include "mlir/IR/Function.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Transforms/InliningUtils.h"
#include "mlir/Transforms/Passes.h"
#include "llvm/ADT/StringSet.h"
using namespace mlir;
namespace {
struct Inliner : public FunctionPass<Inliner> {
void runOnFunction() override {
auto function = getFunction();
// Collect each of the direct function calls within the module.
SmallVector<CallIndirectOp, 16> callers;
function.walk([&](CallIndirectOp caller) { callers.push_back(caller); });
// Build the inliner interface.
InlinerInterface interface(&getContext());
// Try to inline each of the call operations.
for (auto caller : callers) {
auto callee = dyn_cast_or_null<FunctionalRegionOp>(
caller.getCallee()->getDefiningOp());
if (!callee)
continue;
// Inline the functional region operation, but only clone the internal
// region if there is more than one use.
if (failed(inlineRegion(
interface, &callee.body(), caller,
llvm::to_vector<8>(caller.getArgOperands()),
llvm::to_vector<8>(caller.getResults()), caller.getLoc(),
/*shouldCloneInlinedRegion=*/!callee.getResult()->hasOneUse())))
continue;
// If the inlining was successful then erase the call and callee if
// possible.
caller.erase();
if (callee.use_empty())
callee.erase();
}
}
};
} // end anonymous namespace
static PassRegistration<Inliner> pass("test-inline",
"Test inlining region calls");
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