本文整理汇总了C++中BitVector::IsSet方法的典型用法代码示例。如果您正苦于以下问题：C++ BitVector::IsSet方法的具体用法？C++ BitVector::IsSet怎么用？C++ BitVector::IsSet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BitVector的用法示例。
在下文中一共展示了BitVector::IsSet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: GetOldestAvailable
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
bool AggregateCopyPropagation::GetOldestAvailable(Operand* candidateOp,
TOperandToIdDict& availableCopies,
BitVector& killSet,
CopySetInfo& info) {
// Check if an original source is available.
int id;
if(availableCopies.TryGetValue(candidateOp, &id)) {
if(killSet.IsSet(id)) {
// The original is dirty.
return false;
}
info = infoList_[id];
auto originalOp = info.Source;
// Check if an older source is available. This is useful
// for a chain of copies, when the copies are not modified.
while(availableCopies.TryGetValue(originalOp, &id)) {
if(killSet.IsSet(id)) {
return originalOp;
}
info = infoList_[id];
originalOp = info.Source;
}
return true;
}
return false;
}示例2: ComputeBlockExposedAndKillSets
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
void VariableAnalysis::ComputeBlockExposedAndKillSets(Block* block,
BitVector& exposedSet,
BitVector& killSet) {
// Scan all the instructions in the block and look for 'load' and 'store'.
for(auto instr = block->FirstInstruction(); instr;
instr = instr->NextInstruction()) {
if(auto storeInstr = instr->As<StoreInstr>()) {
// A variable can be killed only if it's stored into.
// Note that we don't care about the effects of function calls,
// because in that case the variable is marked as "address taken"
// and it isn't considered for SSA conversion anyway.
if(auto variableRef = storeInstr->DestinationOp()->As<VariableReference>()) {
auto localVar = variableRef->GetVariable();
if(localVar == nullptr) {
continue;
}
killSet.SetBit(localVar->Id());
}
}
else if(auto loadInstr = instr->As<LoadInstr>()) {
// The only way a variable can be "used" is through a 'load' instruction.
// All other kinds of uses will render the variable as being "address taken".
if(auto variableRef = loadInstr->SourceOp()->As<VariableReference>()) {
auto localVar = variableRef->GetVariable();
if(localVar == nullptr) {
continue;
}
// Mark the variable as 'exposed' only if it's not in the 'kill' set.
if(killSet.IsSet(localVar->Id()) == false) {
exposedSet.SetBit(localVar->Id());
}
}
}
}
}