commit 3555cc991e9af934efab77e784b05a4de8665cb3 Author: Georg Koppen gk@torproject.org Date: Wed Dec 16 09:51:41 2020 +0000

Remove unused rust patch --- projects/rust/43909_145.patch | 252 ------------------------------------------ 1 file changed, 252 deletions(-)

diff --git a/projects/rust/43909_145.patch b/projects/rust/43909_145.patch deleted file mode 100644 index 94e2ae2..0000000 --- a/projects/rust/43909_145.patch +++ /dev/null @@ -1,252 +0,0 @@ -From 74ca2aebcd26adc7e3259d0802c07cc61b77a40c Mon Sep 17 00:00:00 2001 -From: Nikita Popov nikita.ppv@gmail.com -Date: Sat, 16 Nov 2019 16:22:18 +0100 -Subject: [PATCH] Restructure caching - -Variant on D70103. The caching is switched to always use a BB to -cache entry map, which then contains per-value caches. A separate -set contains value handles with a deletion callback. This allows us -to properly invalidate overdefined values. - -A possible alternative would be to always cache by value first and -have per-BB maps/sets in the each cache entry. In that case we could -use a ValueMap and would avoid the separate value handle set. I went -with the BB indexing at the top level to make it easier to integrate -D69914, but possibly that's not the right choice. - -Differential Revision: https://reviews.llvm.org/D70376 - -diff --git a/llvm/lib/Analysis/LazyValueInfo.cpp b/llvm/lib/Analysis/LazyValueInfo.cpp -index 7ae7a1fd549..8c9e85e95b3 100644 ---- a/llvm/lib/Analysis/LazyValueInfo.cpp -+++ b/llvm/lib/Analysis/LazyValueInfo.cpp -@@ -136,12 +136,9 @@ namespace { - /// A callback value handle updates the cache when values are erased. - class LazyValueInfoCache; - struct LVIValueHandle final : public CallbackVH { -- // Needs to access getValPtr(), which is protected. -- friend struct DenseMapInfo<LVIValueHandle>; -- - LazyValueInfoCache *Parent; - -- LVIValueHandle(Value *V, LazyValueInfoCache *P) -+ LVIValueHandle(Value *V, LazyValueInfoCache *P = nullptr) - : CallbackVH(V), Parent(P) { } - - void deleted() override; -@@ -155,89 +152,63 @@ namespace { - /// This is the cache kept by LazyValueInfo which - /// maintains information about queries across the clients' queries. - class LazyValueInfoCache { -- /// 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. -- /// Over-defined lattice values are recorded in OverDefinedCache to reduce -- /// memory overhead. -- struct ValueCacheEntryTy { -- ValueCacheEntryTy(Value *V, LazyValueInfoCache *P) : Handle(V, P) {} -- LVIValueHandle Handle; -- SmallDenseMap<PoisoningVH<BasicBlock>, ValueLatticeElement, 4> BlockVals; -+ /// This is all of the cached information for one basic block. It contains -+ /// the per-value lattice elements, as well as a separate set for -+ /// overdefined values to reduce memory usage. -+ struct BlockCacheEntryTy { -+ SmallDenseMap<AssertingVH<Value>, ValueLatticeElement, 4> LatticeElements; -+ SmallDenseSet<AssertingVH<Value>, 4> OverDefined; - }; - -- /// This tracks, on a per-block basis, the set of values that are -- /// over-defined at the end of that block. -- typedef DenseMap<PoisoningVH<BasicBlock>, SmallPtrSet<Value *, 4>> -- OverDefinedCacheTy; -- /// Keep track of all blocks that we have ever seen, so we -- /// don't spend time removing unused blocks from our caches. -- DenseSet<PoisoningVH<BasicBlock> > SeenBlocks; -- -- /// This is all of the cached information for all values, -- /// mapped from Value* to key information. -- DenseMap<Value *, std::unique_ptr<ValueCacheEntryTy>> ValueCache; -- OverDefinedCacheTy OverDefinedCache; -- -+ /// Cached information per basic block. -+ DenseMap<PoisoningVH<BasicBlock>, BlockCacheEntryTy> BlockCache; -+ /// Set of value handles used to erase values from the cache on deletion. -+ DenseSet<LVIValueHandle, DenseMapInfo<Value *>> ValueHandles; - - public: - void insertResult(Value *Val, BasicBlock *BB, - const ValueLatticeElement &Result) { -- SeenBlocks.insert(BB); -- -+ auto &CacheEntry = BlockCache.try_emplace(BB).first->second; - // Insert over-defined values into their own cache to reduce memory - // overhead. - if (Result.isOverdefined()) -- OverDefinedCache[BB].insert(Val); -- else { -- auto It = ValueCache.find_as(Val); -- if (It == ValueCache.end()) { -- ValueCache[Val] = std::make_unique<ValueCacheEntryTy>(Val, this); -- It = ValueCache.find_as(Val); -- assert(It != ValueCache.end() && "Val was just added to the map!"); -- } -- It->second->BlockVals[BB] = Result; -- } -- } -- -- bool isOverdefined(Value *V, BasicBlock *BB) const { -- auto ODI = OverDefinedCache.find(BB); -- -- if (ODI == OverDefinedCache.end()) -- return false; -+ CacheEntry.OverDefined.insert(Val); -+ else -+ CacheEntry.LatticeElements.insert({ Val, Result }); - -- return ODI->second.count(V); -+ auto HandleIt = ValueHandles.find_as(Val); -+ if (HandleIt == ValueHandles.end()) -+ ValueHandles.insert({ Val, this }); - } - - bool hasCachedValueInfo(Value *V, BasicBlock *BB) const { -- if (isOverdefined(V, BB)) -- return true; -- -- auto I = ValueCache.find_as(V); -- if (I == ValueCache.end()) -+ auto It = BlockCache.find(BB); -+ if (It == BlockCache.end()) - return false; - -- return I->second->BlockVals.count(BB); -+ return It->second.OverDefined.count(V) || -+ It->second.LatticeElements.count(V); - } - - ValueLatticeElement getCachedValueInfo(Value *V, BasicBlock *BB) const { -- if (isOverdefined(V, BB)) -+ auto It = BlockCache.find(BB); -+ if (It == BlockCache.end()) -+ return ValueLatticeElement(); -+ -+ if (It->second.OverDefined.count(V)) - return ValueLatticeElement::getOverdefined(); - -- auto I = ValueCache.find_as(V); -- if (I == ValueCache.end()) -- return ValueLatticeElement(); -- auto BBI = I->second->BlockVals.find(BB); -- if (BBI == I->second->BlockVals.end()) -+ auto LatticeIt = It->second.LatticeElements.find(V); -+ if (LatticeIt == It->second.LatticeElements.end()) - return ValueLatticeElement(); -- return BBI->second; -+ -+ return LatticeIt->second; - } - - /// clear - Empty the cache. - void clear() { -- SeenBlocks.clear(); -- ValueCache.clear(); -- OverDefinedCache.clear(); -+ BlockCache.clear(); -+ ValueHandles.clear(); - } - - /// Inform the cache that a given value has been deleted. -@@ -251,23 +222,18 @@ namespace { - /// OldSucc might have (unless also overdefined in NewSucc). This just - /// flushes elements from the cache and does not add any. - void threadEdgeImpl(BasicBlock *OldSucc,BasicBlock *NewSucc); -- -- friend struct LVIValueHandle; - }; - } - - void LazyValueInfoCache::eraseValue(Value *V) { -- for (auto I = OverDefinedCache.begin(), E = OverDefinedCache.end(); I != E;) { -- // Copy and increment the iterator immediately so we can erase behind -- // ourselves. -- auto Iter = I++; -- SmallPtrSetImpl<Value *> &ValueSet = Iter->second; -- ValueSet.erase(V); -- if (ValueSet.empty()) -- OverDefinedCache.erase(Iter); -+ for (auto &Pair : BlockCache) { -+ Pair.second.LatticeElements.erase(V); -+ Pair.second.OverDefined.erase(V); - } - -- ValueCache.erase(V); -+ auto HandleIt = ValueHandles.find_as(V); -+ if (HandleIt != ValueHandles.end()) -+ ValueHandles.erase(HandleIt); - } - - void LVIValueHandle::deleted() { -@@ -277,18 +243,7 @@ void LVIValueHandle::deleted() { - } - - void LazyValueInfoCache::eraseBlock(BasicBlock *BB) { -- // Shortcut if we have never seen this block. -- DenseSet<PoisoningVH<BasicBlock> >::iterator I = SeenBlocks.find(BB); -- if (I == SeenBlocks.end()) -- return; -- SeenBlocks.erase(I); -- -- auto ODI = OverDefinedCache.find(BB); -- if (ODI != OverDefinedCache.end()) -- OverDefinedCache.erase(ODI); -- -- for (auto &I : ValueCache) -- I.second->BlockVals.erase(BB); -+ BlockCache.erase(BB); - } - - void LazyValueInfoCache::threadEdgeImpl(BasicBlock *OldSucc, -@@ -306,10 +261,11 @@ void LazyValueInfoCache::threadEdgeImpl(BasicBlock *OldSucc, - std::vector<BasicBlock*> worklist; - worklist.push_back(OldSucc); - -- auto I = OverDefinedCache.find(OldSucc); -- if (I == OverDefinedCache.end()) -+ auto I = BlockCache.find(OldSucc); -+ if (I == BlockCache.end() || I->second.OverDefined.empty()) - return; // Nothing to process here. -- SmallVector<Value *, 4> ValsToClear(I->second.begin(), I->second.end()); -+ SmallVector<Value *, 4> ValsToClear(I->second.OverDefined.begin(), -+ I->second.OverDefined.end()); - - // Use a worklist to perform a depth-first search of OldSucc's successors. - // NOTE: We do not need a visited list since any blocks we have already -@@ -323,10 +279,10 @@ void LazyValueInfoCache::threadEdgeImpl(BasicBlock *OldSucc, - if (ToUpdate == NewSucc) continue; - - // If a value was marked overdefined in OldSucc, and is here too... -- auto OI = OverDefinedCache.find(ToUpdate); -- if (OI == OverDefinedCache.end()) -+ auto OI = BlockCache.find(ToUpdate); -+ if (OI == BlockCache.end() || OI->second.OverDefined.empty()) - continue; -- SmallPtrSetImpl<Value *> &ValueSet = OI->second; -+ auto &ValueSet = OI->second.OverDefined; - - bool changed = false; - for (Value *V : ValsToClear) { -@@ -336,11 +292,6 @@ void LazyValueInfoCache::threadEdgeImpl(BasicBlock *OldSucc, - // If we removed anything, then we potentially need to update - // blocks successors too. - changed = true; -- -- if (ValueSet.empty()) { -- OverDefinedCache.erase(OI); -- break; -- } - } - - if (!changed) continue; --- -2.28.0 -