| /* |
| * Copyright (C) 2015-2020 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "B3BasicBlock.h" |
| |
| #if ENABLE(B3_JIT) |
| |
| #include "B3BasicBlockInlines.h" |
| #include "B3BasicBlockUtils.h" |
| #include "B3Procedure.h" |
| #include "B3ValueInlines.h" |
| #include <wtf/ListDump.h> |
| |
| namespace JSC { namespace B3 { |
| |
| const char* const BasicBlock::dumpPrefix = "#"; |
| |
| BasicBlock::BasicBlock(unsigned index, double frequency) |
| : m_index(index) |
| , m_frequency(frequency) |
| { |
| } |
| |
| BasicBlock::~BasicBlock() |
| { |
| } |
| |
| void BasicBlock::append(Value* value) |
| { |
| m_values.append(value); |
| value->owner = this; |
| } |
| |
| void BasicBlock::appendNonTerminal(Value* value) |
| { |
| m_values.append(m_values.last()); |
| m_values[m_values.size() - 2] = value; |
| value->owner = this; |
| } |
| |
| void BasicBlock::removeLast(Procedure& proc) |
| { |
| ASSERT(!m_values.isEmpty()); |
| proc.deleteValue(m_values.takeLast()); |
| } |
| |
| void BasicBlock::replaceLast(Procedure& proc, Value* value) |
| { |
| removeLast(proc); |
| append(value); |
| } |
| |
| Value* BasicBlock::appendIntConstant(Procedure& proc, Origin origin, Type type, int64_t value) |
| { |
| Value* result = proc.addIntConstant(origin, type, value); |
| append(result); |
| return result; |
| } |
| |
| Value* BasicBlock::appendIntConstant(Procedure& proc, Value* likeValue, int64_t value) |
| { |
| return appendIntConstant(proc, likeValue->origin(), likeValue->type(), value); |
| } |
| |
| Value* BasicBlock::appendBoolConstant(Procedure& proc, Origin origin, bool value) |
| { |
| return appendIntConstant(proc, origin, Int32, value ? 1 : 0); |
| } |
| |
| void BasicBlock::clearSuccessors() |
| { |
| m_successors.clear(); |
| } |
| |
| void BasicBlock::appendSuccessor(FrequentedBlock target) |
| { |
| m_successors.append(target); |
| } |
| |
| void BasicBlock::setSuccessors(FrequentedBlock target) |
| { |
| m_successors.resize(1); |
| m_successors[0] = target; |
| } |
| |
| void BasicBlock::setSuccessors(FrequentedBlock taken, FrequentedBlock notTaken) |
| { |
| m_successors.resize(2); |
| m_successors[0] = taken; |
| m_successors[1] = notTaken; |
| } |
| |
| bool BasicBlock::replaceSuccessor(BasicBlock* from, BasicBlock* to) |
| { |
| bool result = false; |
| for (BasicBlock*& successor : successorBlocks()) { |
| if (successor == from) { |
| successor = to; |
| result = true; |
| |
| // Keep looping because a successor may be mentioned multiple times, like in a Switch. |
| } |
| } |
| return result; |
| } |
| |
| bool BasicBlock::addPredecessor(BasicBlock* block) |
| { |
| return B3::addPredecessor(this, block); |
| } |
| |
| bool BasicBlock::removePredecessor(BasicBlock* block) |
| { |
| return B3::removePredecessor(this, block); |
| } |
| |
| bool BasicBlock::replacePredecessor(BasicBlock* from, BasicBlock* to) |
| { |
| return B3::replacePredecessor(this, from, to); |
| } |
| |
| void BasicBlock::updatePredecessorsAfter() |
| { |
| B3::updatePredecessorsAfter(this); |
| } |
| |
| void BasicBlock::dump(PrintStream& out) const |
| { |
| out.print(dumpPrefix, m_index); |
| } |
| |
| void BasicBlock::deepDump(const Procedure& proc, PrintStream& out) const |
| { |
| out.print(tierName, "BB", *this, ": ; frequency = ", m_frequency, "\n"); |
| if (predecessors().size()) |
| out.print(tierName, " Predecessors: ", pointerListDump(predecessors()), "\n"); |
| for (Value* value : *this) |
| out.print(tierName, " ", B3::deepDump(proc, value), "\n"); |
| if (!successors().isEmpty()) { |
| out.print(tierName, " Successors: "); |
| if (size()) |
| last()->dumpSuccessors(this, out); |
| else |
| out.print(listDump(successors())); |
| out.print("\n"); |
| } |
| } |
| |
| Value* BasicBlock::appendNewControlValue(Procedure& proc, Opcode opcode, Origin origin) |
| { |
| RELEASE_ASSERT(opcode == Oops || opcode == Return); |
| clearSuccessors(); |
| return appendNew<Value>(proc, opcode, origin); |
| } |
| |
| Value* BasicBlock::appendNewControlValue(Procedure& proc, Opcode opcode, Origin origin, Value* value) |
| { |
| RELEASE_ASSERT(opcode == Return); |
| clearSuccessors(); |
| return appendNew<Value>(proc, opcode, origin, value); |
| } |
| |
| Value* BasicBlock::appendNewControlValue(Procedure& proc, Opcode opcode, Origin origin, const FrequentedBlock& target) |
| { |
| RELEASE_ASSERT(opcode == Jump); |
| setSuccessors(target); |
| return appendNew<Value>(proc, opcode, origin); |
| } |
| |
| Value* BasicBlock::appendNewControlValue(Procedure& proc, Opcode opcode, Origin origin, Value* predicate, const FrequentedBlock& taken, const FrequentedBlock& notTaken) |
| { |
| RELEASE_ASSERT(opcode == Branch); |
| setSuccessors(taken, notTaken); |
| return appendNew<Value>(proc, opcode, origin, predicate); |
| } |
| |
| } } // namespace JSC::B3 |
| |
| #endif // ENABLE(B3_JIT) |