c2e7e75954
around the feature in MLIR's canonicalizer, which considers the semantics of constants differently based on how they are packaged and not their values and use. Add test. Reviewed By: clementval Differential Revision: https://reviews.llvm.org/D121625
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
//===-- AnnotateConstant.cpp ----------------------------------------------===//
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//
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// Part of the LLVM 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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#include "PassDetail.h"
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#include "flang/Optimizer/Dialect/FIROps.h"
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#include "flang/Optimizer/Transforms/Passes.h"
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#include "mlir/IR/BuiltinAttributes.h"
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#define DEBUG_TYPE "flang-annotate-constant"
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using namespace fir;
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namespace {
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struct AnnotateConstantOperands
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: AnnotateConstantOperandsBase<AnnotateConstantOperands> {
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void runOnOperation() override {
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auto *context = &getContext();
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mlir::Dialect *firDialect = context->getLoadedDialect("fir");
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getOperation()->walk([&](mlir::Operation *op) {
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// We filter out other dialects even though they may undergo merging of
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// non-equal constant values by the canonicalizer as well.
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if (op->getDialect() == firDialect) {
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llvm::SmallVector<mlir::Attribute> attrs;
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bool hasOneOrMoreConstOpnd = false;
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for (mlir::Value opnd : op->getOperands()) {
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if (auto constOp = mlir::dyn_cast_or_null<mlir::arith::ConstantOp>(
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opnd.getDefiningOp())) {
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attrs.push_back(constOp.getValue());
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hasOneOrMoreConstOpnd = true;
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} else if (auto addrOp = mlir::dyn_cast_or_null<fir::AddrOfOp>(
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opnd.getDefiningOp())) {
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attrs.push_back(addrOp.getSymbol());
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hasOneOrMoreConstOpnd = true;
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} else {
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attrs.push_back(mlir::UnitAttr::get(context));
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}
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}
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if (hasOneOrMoreConstOpnd)
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op->setAttr("canonicalize_constant_operands",
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mlir::ArrayAttr::get(context, attrs));
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}
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});
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}
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};
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} // namespace
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std::unique_ptr<mlir::Pass> fir::createAnnotateConstantOperandsPass() {
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return std::make_unique<AnnotateConstantOperands>();
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}
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