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//===- TestInlining.cpp - Pass to inline calls in the test dialect --------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// TODO: This pass is only necessary because the main inlining pass
// has not abstracted away the call+callee relationship. When the inlining
// interface has this support, this pass should be removed.
//
//===----------------------------------------------------------------------===//
#include "TestDialect.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/IR/BuiltinOps.h"
#include "mlir/IR/IRMapping.h"
#include "mlir/Pass/Pass.h"
#include "mlir/Transforms/InliningUtils.h"
#include "llvm/ADT/StringSet.h"
using namespace mlir;
using namespace test;
namespace {
struct Inliner : public PassWrapper<Inliner, OperationPass<func::FuncOp>> {
MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(Inliner)
StringRef getArgument() const final { return "test-inline"; }
StringRef getDescription() const final {
return "Test inlining region calls";
}
void runOnOperation() override {
auto function = getOperation();
// Collect each of the direct function calls within the module.
SmallVector<func::CallIndirectOp, 16> callers;
function.walk(
[&](func::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.getBody(), caller, caller.getArgOperands(),
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();
}
}
};
} // namespace
namespace mlir {
namespace test {
void registerInliner() { PassRegistration<Inliner>(); }
} // namespace test
} // namespace mlir
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