本文整理汇总了C++中GetByIdStatus::computeForChain方法的典型用法代码示例。如果您正苦于以下问题：C++ GetByIdStatus::computeForChain方法的具体用法？C++ GetByIdStatus::computeForChain怎么用？C++ GetByIdStatus::computeForChain使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GetByIdStatus的用法示例。
在下文中一共展示了GetByIdStatus::computeForChain方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: computeForStubInfo
GetByIdStatus GetByIdStatus::computeForStubInfo(
const ConcurrentJITLocker&, CodeBlock* profiledBlock, StructureStubInfo* stubInfo,
StringImpl* uid)
{
if (!stubInfo || !stubInfo->seen)
return GetByIdStatus(NoInformation);
if (stubInfo->resetByGC)
return GetByIdStatus(TakesSlowPath, true);
PolymorphicGetByIdList* list = 0;
if (stubInfo->accessType == access_get_by_id_list) {
list = stubInfo->u.getByIdList.list;
for (unsigned i = 0; i < list->size(); ++i) {
if (list->at(i).doesCalls())
return GetByIdStatus(MakesCalls, true);
}
}
// Finally figure out if we can derive an access strategy.
GetByIdStatus result;
result.m_state = Simple;
result.m_wasSeenInJIT = true; // This is interesting for bytecode dumping only.
switch (stubInfo->accessType) {
case access_unset:
return GetByIdStatus(NoInformation);
case access_get_by_id_self: {
Structure* structure = stubInfo->u.getByIdSelf.baseObjectStructure.get();
if (structure->takesSlowPathInDFGForImpureProperty())
return GetByIdStatus(TakesSlowPath, true);
unsigned attributesIgnored;
JSCell* specificValue;
GetByIdVariant variant;
variant.m_offset = structure->getConcurrently(
*profiledBlock->vm(), uid, attributesIgnored, specificValue);
if (!isValidOffset(variant.m_offset))
return GetByIdStatus(TakesSlowPath, true);
if (structure->isDictionary())
specificValue = 0;
variant.m_structureSet.add(structure);
variant.m_specificValue = JSValue(specificValue);
result.appendVariant(variant);
return result;
}
case access_get_by_id_list: {
for (unsigned listIndex = 0; listIndex < list->size(); ++listIndex) {
ASSERT(!list->at(listIndex).doesCalls());
Structure* structure = list->at(listIndex).structure();
if (structure->takesSlowPathInDFGForImpureProperty())
return GetByIdStatus(TakesSlowPath, true);
if (list->at(listIndex).chain()) {
RefPtr<IntendedStructureChain> chain = adoptRef(new IntendedStructureChain(
profiledBlock, structure, list->at(listIndex).chain(),
list->at(listIndex).chainCount()));
if (!result.computeForChain(profiledBlock, uid, chain))
return GetByIdStatus(TakesSlowPath, true);
continue;
}
unsigned attributesIgnored;
JSCell* specificValue;
PropertyOffset myOffset = structure->getConcurrently(
*profiledBlock->vm(), uid, attributesIgnored, specificValue);
if (structure->isDictionary())
specificValue = 0;
if (!isValidOffset(myOffset))
return GetByIdStatus(TakesSlowPath, true);
bool found = false;
for (unsigned variantIndex = 0; variantIndex < result.m_variants.size(); ++variantIndex) {
GetByIdVariant& variant = result.m_variants[variantIndex];
if (variant.m_chain)
continue;
if (variant.m_offset != myOffset)
continue;
found = true;
if (variant.m_structureSet.contains(structure))
break;
if (variant.m_specificValue != JSValue(specificValue))
variant.m_specificValue = JSValue();
variant.m_structureSet.add(structure);
break;
}
if (found)
continue;
if (!result.appendVariant(GetByIdVariant(StructureSet(structure), myOffset, specificValue)))
return GetByIdStatus(TakesSlowPath, true);
//.........这里部分代码省略.........