fd01d8626c
Summary: This changes the implementation of OpResult to have some of the results be represented inline in Value, via a pointer int pair of Operation*+result number, and the rest being trailing objects on the main operation. The full details of the new representation is detailed in the proposal here: https://groups.google.com/a/tensorflow.org/g/mlir/c/XXzzKhqqF_0/m/v6bKb08WCgAJ The only difference between here and the above proposal is that we only steal 2-bits for the Value kind instead of 3. This means that we can only fit 2-results inline instead of 6. This allows for other users to steal the final bit for PointerUnion/etc. If necessary, we can always steal this bit back in the future to save more space if 3-6 results are common enough. Reviewed By: jpienaar Differential Revision: https://reviews.llvm.org/D72020
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
//===- TestInlining.cpp - Pass to inline calls in the test dialect --------===//
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//
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// Part of the MLIR Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// TODO(riverriddle) This pass is only necessary because the main inlining pass
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// has no abstracted away the call+callee relationship. When the inlining
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// interface has this support, this pass should be removed.
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//
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//===----------------------------------------------------------------------===//
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#include "TestDialect.h"
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#include "mlir/Dialect/StandardOps/Ops.h"
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#include "mlir/IR/Function.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Transforms/InliningUtils.h"
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#include "mlir/Transforms/Passes.h"
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#include "llvm/ADT/StringSet.h"
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using namespace mlir;
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namespace {
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struct Inliner : public FunctionPass<Inliner> {
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void runOnFunction() override {
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auto function = getFunction();
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// Collect each of the direct function calls within the module.
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SmallVector<CallIndirectOp, 16> callers;
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function.walk([&](CallIndirectOp caller) { callers.push_back(caller); });
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// Build the inliner interface.
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InlinerInterface interface(&getContext());
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// Try to inline each of the call operations.
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for (auto caller : callers) {
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auto callee = dyn_cast_or_null<FunctionalRegionOp>(
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caller.getCallee()->getDefiningOp());
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if (!callee)
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continue;
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// Inline the functional region operation, but only clone the internal
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// region if there is more than one use.
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if (failed(inlineRegion(
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interface, &callee.body(), caller,
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llvm::to_vector<8>(caller.getArgOperands()),
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SmallVector<Value, 8>(caller.getResults()), caller.getLoc(),
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/*shouldCloneInlinedRegion=*/!callee.getResult()->hasOneUse())))
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continue;
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// If the inlining was successful then erase the call and callee if
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// possible.
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caller.erase();
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if (callee.use_empty())
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callee.erase();
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}
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}
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};
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} // end anonymous namespace
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static PassRegistration<Inliner> pass("test-inline",
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"Test inlining region calls");
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