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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-04-10 09:28:39 +0000
commit32761a6cee1d0dee366b885b7b9c777e67885688 (patch)
treed6bec92bebfb216f4126356e55518842c2f476a1 /Source/JavaScriptCore/b3/B3Procedure.cpp
parenta4e969f4965059196ca948db781e52f7cfebf19e (diff)
downloadWebKitGtk-tarball-32761a6cee1d0dee366b885b7b9c777e67885688.tar.gz
webkitgtk-2.4.11webkitgtk-2.4.11
Diffstat (limited to 'Source/JavaScriptCore/b3/B3Procedure.cpp')
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diff --git a/Source/JavaScriptCore/b3/B3Procedure.cpp b/Source/JavaScriptCore/b3/B3Procedure.cpp
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--- a/Source/JavaScriptCore/b3/B3Procedure.cpp
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-/*
- * Copyright (C) 2015-2016 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 "B3Procedure.h"
-
-#if ENABLE(B3_JIT)
-
-#include "AirCode.h"
-#include "B3BasicBlockInlines.h"
-#include "B3BasicBlockUtils.h"
-#include "B3BlockWorklist.h"
-#include "B3CFG.h"
-#include "B3DataSection.h"
-#include "B3Dominators.h"
-#include "B3OpaqueByproducts.h"
-#include "B3StackSlot.h"
-#include "B3ValueInlines.h"
-#include "B3Variable.h"
-
-namespace JSC { namespace B3 {
-
-Procedure::Procedure()
- : m_cfg(new CFG(*this))
- , m_lastPhaseName("initial")
- , m_byproducts(std::make_unique<OpaqueByproducts>())
- , m_code(new Air::Code(*this))
-{
-}
-
-Procedure::~Procedure()
-{
-}
-
-void Procedure::printOrigin(PrintStream& out, Origin origin) const
-{
- if (m_originPrinter)
- m_originPrinter->run(out, origin);
- else
- out.print(origin);
-}
-
-BasicBlock* Procedure::addBlock(double frequency)
-{
- std::unique_ptr<BasicBlock> block(new BasicBlock(m_blocks.size(), frequency));
- BasicBlock* result = block.get();
- m_blocks.append(WTFMove(block));
- return result;
-}
-
-StackSlot* Procedure::addStackSlot(unsigned byteSize)
-{
- return m_stackSlots.addNew(byteSize);
-}
-
-Variable* Procedure::addVariable(Type type)
-{
- return m_variables.addNew(type);
-}
-
-Value* Procedure::clone(Value* value)
-{
- std::unique_ptr<Value> clone(value->cloneImpl());
- clone->m_index = UINT_MAX;
- clone->owner = nullptr;
- return m_values.add(WTFMove(clone));
-}
-
-Value* Procedure::addIntConstant(Origin origin, Type type, int64_t value)
-{
- switch (type) {
- case Int32:
- return add<Const32Value>(origin, static_cast<int32_t>(value));
- case Int64:
- return add<Const64Value>(origin, value);
- case Double:
- return add<ConstDoubleValue>(origin, static_cast<double>(value));
- case Float:
- return add<ConstFloatValue>(origin, static_cast<float>(value));
- default:
- RELEASE_ASSERT_NOT_REACHED();
- return nullptr;
- }
-}
-
-Value* Procedure::addIntConstant(Value* likeValue, int64_t value)
-{
- return addIntConstant(likeValue->origin(), likeValue->type(), value);
-}
-
-Value* Procedure::addBottom(Origin origin, Type type)
-{
- return addIntConstant(origin, type, 0);
-}
-
-Value* Procedure::addBottom(Value* value)
-{
- return addBottom(value->origin(), value->type());
-}
-
-Value* Procedure::addBoolConstant(Origin origin, TriState triState)
-{
- int32_t value = 0;
- switch (triState) {
- case FalseTriState:
- value = 0;
- break;
- case TrueTriState:
- value = 1;
- break;
- case MixedTriState:
- return nullptr;
- }
-
- return addIntConstant(origin, Int32, value);
-}
-
-void Procedure::resetValueOwners()
-{
- for (BasicBlock* block : *this) {
- for (Value* value : *block)
- value->owner = block;
- }
-}
-
-void Procedure::resetReachability()
-{
- if (shouldValidateIR()) {
- // Validate the basic properties that we need for resetting reachability. We often reset
- // reachability before IR validation, so without this mini-validation, you would crash inside
- // B3::resetReachability() without getting any IR dump.
-
- BasicBlock* badBlock = nullptr;
- for (BasicBlock* block : *this) {
- if (!block->size()) {
- badBlock = block;
- break;
- }
-
- if (!block->last()->as<ControlValue>()) {
- badBlock = block;
- break;
- }
- }
-
- if (badBlock) {
- dataLog("FATAL: Invalid basic block ", *badBlock, " while running Procedure::resetReachability().\n");
- dataLog(*this);
- RELEASE_ASSERT_NOT_REACHED();
- }
- }
-
- B3::resetReachability(
- m_blocks,
- [&] (BasicBlock* deleted) {
- // Gotta delete the values in this block.
- for (Value* value : *deleted)
- deleteValue(value);
- });
-}
-
-void Procedure::invalidateCFG()
-{
- m_dominators = nullptr;
-}
-
-void Procedure::dump(PrintStream& out) const
-{
- IndexSet<Value> valuesInBlocks;
- for (BasicBlock* block : *this) {
- out.print(deepDump(*this, block));
- valuesInBlocks.addAll(*block);
- }
- bool didPrint = false;
- for (Value* value : values()) {
- if (valuesInBlocks.contains(value))
- continue;
-
- if (!didPrint) {
- dataLog("Orphaned values:\n");
- didPrint = true;
- }
- dataLog(" ", deepDump(*this, value), "\n");
- }
- if (variables().size()) {
- out.print("Variables:\n");
- for (Variable* variable : variables())
- out.print(" ", deepDump(variable), "\n");
- }
- if (stackSlots().size()) {
- out.print("Stack slots:\n");
- for (StackSlot* slot : stackSlots())
- out.print(" ", pointerDump(slot), ": ", deepDump(slot), "\n");
- }
- if (m_byproducts->count())
- out.print(*m_byproducts);
-}
-
-Vector<BasicBlock*> Procedure::blocksInPreOrder()
-{
- return B3::blocksInPreOrder(at(0));
-}
-
-Vector<BasicBlock*> Procedure::blocksInPostOrder()
-{
- return B3::blocksInPostOrder(at(0));
-}
-
-void Procedure::deleteStackSlot(StackSlot* stackSlot)
-{
- m_stackSlots.remove(stackSlot);
-}
-
-void Procedure::deleteVariable(Variable* variable)
-{
- m_variables.remove(variable);
-}
-
-void Procedure::deleteValue(Value* value)
-{
- m_values.remove(value);
-}
-
-void Procedure::deleteOrphans()
-{
- IndexSet<Value> valuesInBlocks;
- for (BasicBlock* block : *this)
- valuesInBlocks.addAll(*block);
-
- // Since this method is not on any hot path, we do it conservatively: first a pass to
- // identify the values to be removed, and then a second pass to remove them. This avoids any
- // risk of the value iteration being broken by removals.
- Vector<Value*, 16> toRemove;
- for (Value* value : values()) {
- if (!valuesInBlocks.contains(value))
- toRemove.append(value);
- }
-
- for (Value* value : toRemove)
- deleteValue(value);
-}
-
-Dominators& Procedure::dominators()
-{
- if (!m_dominators)
- m_dominators = std::make_unique<Dominators>(*this);
- return *m_dominators;
-}
-
-void Procedure::addFastConstant(const ValueKey& constant)
-{
- RELEASE_ASSERT(constant.isConstant());
- m_fastConstants.add(constant);
-}
-
-bool Procedure::isFastConstant(const ValueKey& constant)
-{
- if (!constant)
- return false;
- return m_fastConstants.contains(constant);
-}
-
-void* Procedure::addDataSection(size_t size)
-{
- if (!size)
- return nullptr;
- std::unique_ptr<DataSection> dataSection = std::make_unique<DataSection>(size);
- void* result = dataSection->data();
- m_byproducts->add(WTFMove(dataSection));
- return result;
-}
-
-unsigned Procedure::callArgAreaSize() const
-{
- return code().callArgAreaSize();
-}
-
-void Procedure::requestCallArgAreaSize(unsigned size)
-{
- code().requestCallArgAreaSize(size);
-}
-
-unsigned Procedure::frameSize() const
-{
- return code().frameSize();
-}
-
-const RegisterAtOffsetList& Procedure::calleeSaveRegisters() const
-{
- return code().calleeSaveRegisters();
-}
-
-Value* Procedure::addValueImpl(Value* value)
-{
- return m_values.add(std::unique_ptr<Value>(value));
-}
-
-void Procedure::setBlockOrderImpl(Vector<BasicBlock*>& blocks)
-{
- IndexSet<BasicBlock> blocksSet;
- blocksSet.addAll(blocks);
-
- for (BasicBlock* block : *this) {
- if (!blocksSet.contains(block))
- blocks.append(block);
- }
-
- // Place blocks into this's block list by first leaking all of the blocks and then readopting
- // them.
- for (auto& entry : m_blocks)
- entry.release();
-
- m_blocks.resize(blocks.size());
- for (unsigned i = 0; i < blocks.size(); ++i) {
- BasicBlock* block = blocks[i];
- block->m_index = i;
- m_blocks[i] = std::unique_ptr<BasicBlock>(block);
- }
-}
-
-} } // namespace JSC::B3
-
-#endif // ENABLE(B3_JIT)