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[pmo] Eliminate PMOUseKind::PartialStore. #21972

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Merged
merged 1 commit into from
Jan 18, 2019
Merged

[pmo] Eliminate PMOUseKind::PartialStore. #21972

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36 changes: 15 additions & 21 deletions lib/SILOptimizer/Mandatory/PMOMemoryUseCollector.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -254,14 +254,11 @@ bool ElementUseCollector::collectUses(SILValue Pointer) {

// Coming out of SILGen, we assume that raw stores are initializations,
// unless they have trivial type (which we classify as InitOrAssign).
PMOUseKind Kind;
if (InStructSubElement)
Kind = PMOUseKind::PartialStore;
else if (PointeeType.isTrivial(User->getModule()))
Kind = PMOUseKind::InitOrAssign;
else
Kind = PMOUseKind::Initialization;

auto Kind = ([&]() -> PMOUseKind {
if (PointeeType.isTrivial(User->getModule()))
return PMOUseKind::InitOrAssign;
return PMOUseKind::Initialization;
})();
Uses.emplace_back(User, Kind);
continue;
}
Expand All @@ -270,9 +267,7 @@ bool ElementUseCollector::collectUses(SILValue Pointer) {
if (auto *SI = dyn_cast<Store##Name##Inst>(User)) { \
if (UI->getOperandNumber() == 1) { \
PMOUseKind Kind; \
if (InStructSubElement) \
Kind = PMOUseKind::PartialStore; \
else if (SI->isInitializationOfDest()) \
if (SI->isInitializationOfDest()) \
Kind = PMOUseKind::Initialization; \
else \
Kind = PMOUseKind::Assign; \
Expand All @@ -294,16 +289,15 @@ bool ElementUseCollector::collectUses(SILValue Pointer) {
// the destination, then this is an unknown assignment. Note that we'll
// revisit this instruction and add it to Uses twice if it is both a load
// and store to the same aggregate.
PMOUseKind Kind;
if (UI->getOperandNumber() == 0)
Kind = PMOUseKind::Load;
else if (InStructSubElement)
Kind = PMOUseKind::PartialStore;
else if (CAI->isInitializationOfDest())
Kind = PMOUseKind::Initialization;
else
Kind = PMOUseKind::Assign;

//
// Inline constructor.
auto Kind = ([&]() -> PMOUseKind {
if (UI->getOperandNumber() == CopyAddrInst::Src)
return PMOUseKind::Load;
if (CAI->isInitializationOfDest())
return PMOUseKind::Initialization;
return PMOUseKind::Assign;
})();
Uses.emplace_back(User, Kind);
continue;
}
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3 changes: 0 additions & 3 deletions lib/SILOptimizer/Mandatory/PMOMemoryUseCollector.h
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Expand Up @@ -116,9 +116,6 @@ enum PMOUseKind {
/// value.
Assign,

/// The instruction is a store to a member of a larger struct value.
PartialStore,

/// An indirect 'inout' parameter of an Apply instruction.
InOutUse,

Expand Down
3 changes: 1 addition & 2 deletions lib/SILOptimizer/Mandatory/PredictableMemOpt.cpp
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Expand Up @@ -911,7 +911,7 @@ void AvailableValueDataflowContext::explodeCopyAddr(CopyAddrInst *CAI) {
assert((LoadUse.isValid() || StoreUse.isValid()) &&
"we should have a load or a store, possibly both");
assert(StoreUse.isInvalid() || StoreUse.Kind == Assign ||
StoreUse.Kind == PartialStore || StoreUse.Kind == Initialization);
StoreUse.Kind == Initialization);

// Now that we've emitted a bunch of instructions, including a load and store
// but also including other stuff, update the internal state of
Expand Down Expand Up @@ -1286,7 +1286,6 @@ bool AllocOptimize::tryToRemoveDeadAllocation() {

switch (u.Kind) {
case PMOUseKind::Assign:
case PMOUseKind::PartialStore:
case PMOUseKind::InitOrAssign:
break; // These don't prevent removal.
case PMOUseKind::Initialization:
Expand Down