本文整理汇总了C++中tr::Node::getUseDefIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ Node::getUseDefIndex方法的具体用法？C++ Node::getUseDefIndex怎么用？C++ Node::getUseDefIndex使用的例子？那么恭喜您, 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tr::Node的用法示例。
在下文中一共展示了Node::getUseDefIndex方法的2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: flagPreferredLoadExtensions
void TR_LoadExtensions::flagPreferredLoadExtensions(TR::Node* parent)
{
if (isSupportedType(parent) && parent->getOpCode().isConversion())
{
TR::Node* child = parent->getFirstChild();
bool canSkipConversion = false;
if (isSupportedType(child))
{
if (parent->getSize() == child->getSize())
{
TR::DebugCounter::incStaticDebugCounter(comp(), TR::DebugCounter::debugCounterName(comp(), "codegen/LoadExtensions/success/unneededConversion/%s", comp()->signature()));
parent->setUnneededConversion(true);
}
else
{
TR::ILOpCode& childOpCode = child->getOpCode();
if (childOpCode.isLoadReg()
&& !(parent->getSize() > 4 && TR::Compiler->target.is32Bit())
&& excludedNodes->count(parent) == 0)
{
TR::Node* useRegLoad = child;
TR_UseDefInfo* useDefInfo = optimizer()->getUseDefInfo();
if (useDefInfo != NULL && useDefInfo->infoIsValid() && useRegLoad->getUseDefIndex() != 0 && useDefInfo->isUseIndex(useRegLoad->getUseDefIndex() != 0))
{
TR_UseDefInfo::BitVector info(comp()->allocator());
if (useDefInfo->getUseDef(info, useRegLoad->getUseDefIndex()))
{
TR_UseDefInfo::BitVector::Cursor cursor(info);
int32_t firstDefIndex = useDefInfo->getFirstRealDefIndex();
int32_t firstUseIndex = useDefInfo->getFirstUseIndex();
canSkipConversion = true;
bool forceExtensionOnAnyLoads = false;
bool forceExtensionOnAllLoads = true;
for (cursor.SetToFirstOne(); cursor.Valid() && canSkipConversion; cursor.SetToNextOne())
{
int32_t defIndex = cursor;
// We've examined all the defs of this particular use
if (defIndex >= firstUseIndex)
{
break;
}
// Do not consider defs that correspond to method arguments as we cannot force extension on those
if (defIndex < firstDefIndex)
{
continue;
}
TR::Node* defRegLoad = useDefInfo->getNode(defIndex);
if (defRegLoad != NULL)
{
TR::Node* defRegLoadChild = defRegLoad->getFirstChild();
bool forceExtension = false;
canSkipConversion = TR_LoadExtensions::canSkipConversion(parent, defRegLoadChild, forceExtension);
forceExtensionOnAnyLoads |= forceExtension;
forceExtensionOnAllLoads &= forceExtension;
// If we have to force extension on any loads which feed a def of this use ensure we must also
// force extension on all such loads. Conversely the conversion can be skipped if none of the
// loads feeding the def of this use need to be extended. This ensures either all loads feeding
// into defs of this use should be extended or none of them.
canSkipConversion &= forceExtensionOnAllLoads == forceExtensionOnAnyLoads;
if (trace())
{
traceMsg(comp(), "\t\tPeeked through %s [%p] and found %s [%p] with child %s [%p] - conversion %s be skipped\n",
useRegLoad->getOpCode().getName(),
useRegLoad,
defRegLoad->getOpCode().getName(),
defRegLoad,
defRegLoadChild->getOpCode().getName(),
defRegLoadChild,
canSkipConversion ?
"can" :
"cannot");
}
}
}
if (canSkipConversion && performTransformation(comp(), "%sSkipping conversion %s [%p] after RegLoad\n", optDetailString(), parent->getOpCode().getName(), parent))
{
TR::DebugCounter::incStaticDebugCounter(comp(), TR::DebugCounter::debugCounterName(comp(), "codegen/LoadExtensions/success/unneededConversion/GRA/%s", comp()->signature()));
parent->setUnneededConversion(true);
//.........这里部分代码省略.........
示例2: findPreferredLoadExtensions
void TR_LoadExtensions::findPreferredLoadExtensions(TR::Node* parent)
{
TR::ILOpCode& parentOpCode = parent->getOpCode();
// count how a load is being used. As a signed or unsigned number?
if (isSupportedType(parent) && parentOpCode.isConversion())
{
TR::Node* child = parent->getFirstChild();
// Only examine non-trivial conversions
if (isSupportedType(child) && parent->getSize() != child->getSize())
{
if (isSupportedLoad(child))
{
setExtensionPreference(child, parent);
}
else if (child->getOpCode().isLoadReg())
{
TR::Node* useRegLoad = child;
TR_UseDefInfo* useDefInfo = optimizer()->getUseDefInfo();
// If we have usedef info we can traverse all defs of this particular use and if all the defs are stores
// of supported counted loads then we can count such loads as well. If this criteria is not met then there
// exists at least one def (store) of this particular use which feeds from a non-load operation (an
// addition for example). These are not candidates for skipping extension because we cannot easily extend
// a non-load operation.
if (useDefInfo != NULL && useDefInfo->infoIsValid() && useRegLoad->getUseDefIndex() != 0 && useDefInfo->isUseIndex(useRegLoad->getUseDefIndex() != 0))
{
TR_UseDefInfo::BitVector info(comp()->allocator());
if (useDefInfo->getUseDef(info, useRegLoad->getUseDefIndex()))
{
if (trace())
{
traceMsg(comp(), "\t\tPeeking through RegLoad %p for conversion %s [%p]\n",
useRegLoad,
parentOpCode.getName(),
parent);
}
TR_UseDefInfo::BitVector::Cursor cursor(info);
int32_t firstDefIndex = useDefInfo->getFirstRealDefIndex();
int32_t firstUseIndex = useDefInfo->getFirstUseIndex();
for (cursor.SetToFirstOne(); cursor.Valid(); cursor.SetToNextOne())
{
int32_t defIndex = cursor;
// We've examined all the defs of this particular use
if (defIndex >= firstUseIndex)
{
break;
}
// Do not consider defs that correspond to method arguments as we cannot force extension on those
if (defIndex < firstDefIndex)
{
(*excludedNodes)[parent] = true;
break;
}
TR::Node* defRegLoad = useDefInfo->getNode(defIndex);
if (defRegLoad != NULL)
{
TR::Node* defRegLoadChild = defRegLoad->getFirstChild();
if (defRegLoad->getOpCode().isStoreReg() && isSupportedType(defRegLoadChild) && isSupportedLoad(defRegLoadChild))
{
if (trace())
{
traceMsg(comp(), "\t\tPeeked through use %s [%p] and found def %s [%p] with child %s [%p] - Counting [%p]\n",
useRegLoad->getOpCode().getName(),
useRegLoad,
defRegLoad->getOpCode().getName(),
defRegLoad,
defRegLoadChild->getOpCode().getName(),
defRegLoadChild,
defRegLoadChild);
}
setExtensionPreference(defRegLoadChild, parent);
}
else
{
if (trace())
{
traceMsg(comp(), "\t\tPeeked through use %s [%p] and found def %s [%p] with child %s [%p] - Excluding [%p]\n",
useRegLoad->getOpCode().getName(),
useRegLoad,
defRegLoad->getOpCode().getName(),
defRegLoad,
defRegLoadChild != NULL ?
defRegLoadChild->getOpCode().getName() :
"NULL",
defRegLoadChild,
parent);
}
//.........这里部分代码省略.........