327fa06a6b
Original-commit: flang-compiler/f18@c5561646ea Reviewed-on: https://github.com/flang-compiler/f18/pull/334 Tree-same-pre-rewrite: false
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
// Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "basicblock.h"
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#include "statements.h"
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namespace Fortran::FIR {
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BasicBlock::BasicBlock(Region *parentRegion, BasicBlock *insertBefore)
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: ChildMixin{parentRegion} {
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parent->insertBefore(this, insertBefore);
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}
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BasicBlock::~BasicBlock() { statementList_.clear(); }
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void BasicBlock::insertBefore(Statement *stmt, Statement *before) {
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if (before) {
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statementList_.insert(before->getIterator(), stmt);
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} else {
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statementList_.push_back(stmt);
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}
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}
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void BasicBlock::addPred(BasicBlock *bb) {
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for (auto *p : preds_) {
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if (p == bb) {
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return;
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}
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}
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preds_.push_back(bb);
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}
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const Statement *BasicBlock::terminator() const {
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if (statementList_.empty()) {
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return nullptr;
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}
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const auto &lastStmt{statementList_.back()};
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return std::visit(
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[&lastStmt](auto stmt) -> const Statement * {
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if constexpr (std::is_base_of_v<TerminatorStmt_impl,
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std::decay_t<decltype(stmt)>>) {
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return &lastStmt;
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}
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return nullptr;
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},
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lastStmt.u);
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}
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}
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