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[g-arc-opts] Refactor ARCBBState from GlobalARCSequenceDataflow.cpp -> *.h.

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Swift SVN r18690
This commit is contained in:
Michael Gottesman
2014-06-01 22:22:24 +00:00
parent 483ba706be
commit 25803adbb4
2 changed files with 99 additions and 87 deletions
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88
lib/SILAnalysis/GlobalARCSequenceDataflow.cpp
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@@ -41,92 +41,6 @@ static bool isAutoreleasePoolCall(SILInstruction &I) {
.Default(false);
}
//===----------------------------------------------------------------------===//
// Basic Block State
//===----------------------------------------------------------------------===//
namespace {
/// \brief Per-BasicBlock state.
class ARCBBState {
public:
using TopDownMapTy = BlotMapVector<SILValue, TopDownRefCountState>;
using BottomUpMapTy = BlotMapVector<SILValue, BottomUpRefCountState>;
private:
/// The basic block that this bbstate corresponds to.
SILBasicBlock &BB;
/// The top-down traversal uses this to record information known about a
/// pointer at the bottom of each block.
TopDownMapTy PtrToTopDownState;
/// The bottom-up traversal uses this to record information known about a
/// pointer at the top of each block.
BottomUpMapTy PtrToBottomUpState;
public:
ARCBBState(SILBasicBlock &BB) : BB(BB) {}
/// Top Down Iterators
using topdown_iterator = TopDownMapTy::iterator;
using topdown_const_iterator = TopDownMapTy::const_iterator;
topdown_iterator topdown_begin() { return PtrToTopDownState.begin(); }
topdown_iterator topdown_end() { return PtrToTopDownState.end(); }
topdown_const_iterator topdown_begin() const {
return PtrToTopDownState.begin();
}
topdown_const_iterator topdown_end() const {
return PtrToTopDownState.end();
}
Range<topdown_iterator> getTopDownStates() {
return make_range(topdown_begin(), topdown_end());
}
/// Bottom up iteration.
using bottomup_iterator = BottomUpMapTy::iterator;
using bottomup_const_iterator = BottomUpMapTy::const_iterator;
bottomup_iterator bottomup_begin() { return PtrToBottomUpState.begin(); }
bottomup_iterator bottomup_end() { return PtrToBottomUpState.end(); }
bottomup_const_iterator bottomup_begin() const {
return PtrToBottomUpState.begin();
}
bottomup_const_iterator bottomup_end() const {
return PtrToBottomUpState.end();
}
Range<bottomup_iterator> getBottomupStates() {
return make_range(bottomup_begin(), bottomup_end());
}
/// Attempt to find the PtrState object describing the top down state for
/// pointer Arg. Return a new initialized PtrState describing the top down
/// state for Arg if we do not find one.
TopDownRefCountState &getTopDownRefCountState(SILValue Ptr) {
return PtrToTopDownState[Ptr];
}
/// Attempt to find the PtrState object describing the bottom up state for
/// pointer Arg. Return a new initialized PtrState describing the bottom up
/// state for Arg if we do not find one.
BottomUpRefCountState & getBottomUpRefCountState(SILValue Ptr) {
return PtrToBottomUpState[Ptr];
}
void clearTopDownState() {
PtrToTopDownState.clear();
}
void clearBottomUpState() {
PtrToBottomUpState.clear();
}
void clear() {
clearTopDownState();
clearBottomUpState();
}
SILBasicBlock &getBB() const { return BB; }
};
} // end anonymous namespace
//===----------------------------------------------------------------------===//
// Top Down Dataflow
//===----------------------------------------------------------------------===//
@@ -398,7 +312,7 @@ bool swift::arc::performARCSequenceDataflow(
for (auto &BB : F) {
DEBUG(llvm::dbgs() << "\n<<< Processing New BB! >>>\n");
ARCBBState state(BB);
ARCBBState state(&BB);
// Perform the bottom up and then top down dataflow.
NestingDetected |= processBBBottomUp(state, IncToDecStateMap, AA);