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Reorder, rename, and document some members to make this easier to follow.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122929 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2011-01-05 23:26:22 +00:00
parent 0b71d3972d
commit e68713ae8b
1 changed files with 23 additions and 20 deletions
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43
lib/Analysis/LazyValueInfo.cpp
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@ -351,13 +351,26 @@ namespace {
/// LazyValueInfoCache - This is the cache kept by LazyValueInfo which
/// maintains information about queries across the clients' queries.
class LazyValueInfoCache {
public:
/// ValueCacheEntryTy - This is all of the cached block information for
/// exactly one Value*. The entries are sorted by the BasicBlock* of the
/// entries, allowing us to do a lookup with a binary search.
typedef std::map<AssertingVH<BasicBlock>, LVILatticeVal> ValueCacheEntryTy;
private:
/// ValueCache - This is all of the cached information for all values,
/// mapped from Value* to key information.
DenseMap<LVIValueHandle, ValueCacheEntryTy> ValueCache;
/// OverDefinedCache - This tracks, on a per-block basis, the set of
/// values that are over-defined at the end of that block. This is required
/// for cache updating.
typedef std::pair<AssertingVH<BasicBlock>, Value*> OverDefinedPairTy;
DenseSet<OverDefinedPairTy> OverDefinedCache;
/// BlockValueStack - This stack holds the state of the value solver
/// during a query. It basically emulates the callstack of the naive
/// recursive value lookup process.
std::stack<std::pair<BasicBlock*, Value*> > BlockValueStack;
friend struct LVIValueHandle;
/// OverDefinedCacheUpdater - A helper object that ensures that the
@ -378,16 +391,8 @@ namespace {
return changed;
}
};
/// ValueCache - This is all of the cached information for all values,
/// mapped from Value* to key information.
DenseMap<LVIValueHandle, ValueCacheEntryTy> ValueCache;
/// OverDefinedCache - This tracks, on a per-block basis, the set of
/// values that are over-defined at the end of that block. This is required
/// for cache updating.
typedef std::pair<AssertingVH<BasicBlock>, Value*> OverDefinedPairTy;
DenseSet<OverDefinedPairTy> OverDefinedCache;
LVILatticeVal getBlockValue(Value *Val, BasicBlock *BB);
bool getEdgeValue(Value *V, BasicBlock *F, BasicBlock *T,
@ -410,8 +415,6 @@ namespace {
ValueCacheEntryTy &lookup(Value *V) {
return ValueCache[LVIValueHandle(V, this)];
}
std::stack<std::pair<BasicBlock*, Value*> > block_value_stack;
public:
/// getValueInBlock - This is the query interface to determine the lattice
@ -478,10 +481,10 @@ void LazyValueInfoCache::eraseBlock(BasicBlock *BB) {
}
void LazyValueInfoCache::solve() {
while (!block_value_stack.empty()) {
std::pair<BasicBlock*, Value*> &e = block_value_stack.top();
while (!BlockValueStack.empty()) {
std::pair<BasicBlock*, Value*> &e = BlockValueStack.top();
if (solveBlockValue(e.second, e.first))
block_value_stack.pop();
BlockValueStack.pop();
}
}
@ -688,7 +691,7 @@ bool LazyValueInfoCache::solveBlockValueConstantRange(LVILatticeVal &BBLV,
BasicBlock *BB) {
// Figure out the range of the LHS. If that fails, bail.
if (!hasBlockValue(BBI->getOperand(0), BB)) {
block_value_stack.push(std::make_pair(BB, BBI->getOperand(0)));
BlockValueStack.push(std::make_pair(BB, BBI->getOperand(0)));
return false;
}
@ -818,7 +821,7 @@ bool LazyValueInfoCache::getEdgeValue(Value *Val, BasicBlock *BBFrom,
// Figure out the possible values of the query BEFORE this branch.
if (!hasBlockValue(Val, BBFrom)) {
block_value_stack.push(std::make_pair(BBFrom, Val));
BlockValueStack.push(std::make_pair(BBFrom, Val));
return false;
}
@ -872,7 +875,7 @@ bool LazyValueInfoCache::getEdgeValue(Value *Val, BasicBlock *BBFrom,
Result = getBlockValue(Val, BBFrom);
return true;
}
block_value_stack.push(std::make_pair(BBFrom, Val));
BlockValueStack.push(std::make_pair(BBFrom, Val));
return false;
}
@ -880,7 +883,7 @@ LVILatticeVal LazyValueInfoCache::getValueInBlock(Value *V, BasicBlock *BB) {
DEBUG(dbgs() << "LVI Getting block end value " << *V << " at '"
<< BB->getName() << "'\n");
block_value_stack.push(std::make_pair(BB, V));
BlockValueStack.push(std::make_pair(BB, V));
solve();
LVILatticeVal Result = getBlockValue(V, BB);