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Replace LinkedList by IntrusiveList to avoid allocations on JIT (#931)

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* Replace LinkedList by IntrusiveList to avoid allocations on JIT

* Fix wrong replacements
This commit is contained in:
gdkchan 2020-02-17 18:30:54 -03:00 • committed by GitHub
parent e9a37ca6a8
commit e5f78fb1d4
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GPG key ID: 4AEE18F83AFDEB23
18 changed files with 365 additions and 198 deletions
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24
ARMeilleure/Translation/ControlFlowGraph.cs
View file

@ -9,13 +9,13 @@ namespace ARMeilleure.Translation
{
public BasicBlock Entry { get; }
public LinkedList<BasicBlock> Blocks { get; }
public IntrusiveList<BasicBlock> Blocks { get; }
public BasicBlock[] PostOrderBlocks { get; }
public int[] PostOrderMap { get; }
public ControlFlowGraph(BasicBlock entry, LinkedList<BasicBlock> blocks)
public ControlFlowGraph(BasicBlock entry, IntrusiveList<BasicBlock> blocks)
{
Entry = entry;
Blocks = blocks;
@ -57,7 +57,7 @@ namespace ARMeilleure.Translation
}
}
private void RemoveUnreachableBlocks(LinkedList<BasicBlock> blocks)
private void RemoveUnreachableBlocks(IntrusiveList<BasicBlock> blocks)
{
HashSet<BasicBlock> visited = new HashSet<BasicBlock>();
@ -87,25 +87,23 @@ namespace ARMeilleure.Translation
// Remove unreachable blocks and renumber.
int index = 0;
for (LinkedListNode<BasicBlock> node = blocks.First; node != null;)
for (BasicBlock block = blocks.First; block != null;)
{
LinkedListNode<BasicBlock> nextNode = node.Next;
BasicBlock block = node.Value;
BasicBlock nextBlock = block.ListNext;
if (!visited.Contains(block))
{
block.Next = null;
block.Next = null;
block.Branch = null;
blocks.Remove(node);
blocks.Remove(block);
}
else
{
block.Index = index++;
}
node = nextNode;
block = nextBlock;
}
}
}
@ -130,7 +128,7 @@ namespace ARMeilleure.Translation
}
// Insert the new block on the list of blocks.
BasicBlock succPrev = successor.Node.Previous?.Value;
BasicBlock succPrev = successor.ListPrevious;
if (succPrev != null && succPrev != predecessor && succPrev.Next == successor)
{
@ -145,12 +143,12 @@ namespace ARMeilleure.Translation
splitBlock2.Operations.AddLast(new Operation(Instruction.Branch, null));
Blocks.AddBefore(successor.Node, splitBlock2);
Blocks.AddBefore(successor, splitBlock2);
}
splitBlock.Next = successor;
Blocks.AddBefore(successor.Node, splitBlock);
Blocks.AddBefore(successor, splitBlock);
return splitBlock;
}

2
ARMeilleure/Translation/Dominance.cs
View file

@ -71,7 +71,7 @@ namespace ARMeilleure.Translation
public static void FindDominanceFrontiers(ControlFlowGraph cfg)
{
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
if (block.Predecessors.Count < 2)
{

11
ARMeilleure/Translation/EmitterContext.cs
View file

@ -12,7 +12,7 @@ namespace ARMeilleure.Translation
{
private Dictionary<Operand, BasicBlock> _irLabels;
private LinkedList<BasicBlock> _irBlocks;
private IntrusiveList<BasicBlock> _irBlocks;
private BasicBlock _irBlock;
@ -22,7 +22,7 @@ namespace ARMeilleure.Translation
{
_irLabels = new Dictionary<Operand, BasicBlock>();
_irBlocks = new LinkedList<BasicBlock>();
_irBlocks = new IntrusiveList<BasicBlock>();
_needsNewBlock = true;
}
@ -508,7 +508,8 @@ namespace ARMeilleure.Translation
if (_irLabels.TryGetValue(label, out BasicBlock nextBlock))
{
nextBlock.Index = _irBlocks.Count;
nextBlock.Node = _irBlocks.AddLast(nextBlock);
_irBlocks.AddLast(nextBlock);
NextBlock(nextBlock);
}
@ -524,7 +525,7 @@ namespace ARMeilleure.Translation
{
BasicBlock block = new BasicBlock(_irBlocks.Count);
block.Node = _irBlocks.AddLast(block);
_irBlocks.AddLast(block);
NextBlock(block);
}
@ -556,7 +557,7 @@ namespace ARMeilleure.Translation
public ControlFlowGraph GetControlFlowGraph()
{
return new ControlFlowGraph(_irBlocks.First.Value, _irBlocks);
return new ControlFlowGraph(_irBlocks.First, _irBlocks);
}
}
}

4
ARMeilleure/Translation/RegisterToLocal.cs
View file

@ -25,9 +25,9 @@ namespace ARMeilleure.Translation
return local;
}
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
foreach (Node node in block.Operations)
for (Node node = block.Operations.First; node != null; node = node.ListNext)
{
Operand dest = node.Destination;

16
ARMeilleure/Translation/RegisterUsage.cs
View file

@ -74,9 +74,9 @@ namespace ARMeilleure.Translation
RegisterMask[] localInputs = new RegisterMask[cfg.Blocks.Count];
RegisterMask[] localOutputs = new RegisterMask[cfg.Blocks.Count];
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
foreach (Node node in block.Operations)
for (Node node = block.Operations.First; node != null; node = node.ListNext)
{
Operation operation = node as Operation;
@ -192,13 +192,13 @@ namespace ARMeilleure.Translation
while (modified);
// Insert load and store context instructions where needed.
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
bool hasContextLoad = HasContextLoad(block);
if (hasContextLoad)
{
block.Operations.RemoveFirst();
block.Operations.Remove(block.Operations.First);
}
// The only block without any predecessor should be the entry block.
@ -213,7 +213,7 @@ namespace ARMeilleure.Translation
if (hasContextStore)
{
block.Operations.RemoveLast();
block.Operations.Remove(block.Operations.Last);
}
if (EndsWithReturn(block) || hasContextStore)
@ -226,7 +226,7 @@ namespace ARMeilleure.Translation
private static bool HasContextLoad(BasicBlock block)
{
return StartsWith(block, Instruction.LoadFromContext) && block.Operations.First.Value.SourcesCount == 0;
return StartsWith(block, Instruction.LoadFromContext) && block.Operations.First.SourcesCount == 0;
}
private static bool HasContextStore(BasicBlock block)
@ -241,7 +241,7 @@ namespace ARMeilleure.Translation
return false;
}
return block.Operations.First.Value is Operation operation && operation.Instruction == inst;
return block.Operations.First is Operation operation && operation.Instruction == inst;
}
private static bool EndsWith(BasicBlock block, Instruction inst)
@ -251,7 +251,7 @@ namespace ARMeilleure.Translation
return false;
}
return block.Operations.Last.Value is Operation operation && operation.Instruction == inst;
return block.Operations.Last is Operation operation && operation.Instruction == inst;
}
private static RegisterMask GetMask(Register register)

26
ARMeilleure/Translation/SsaConstruction.cs
View file

@ -47,7 +47,7 @@ namespace ARMeilleure.Translation
{
DefMap[] globalDefs = new DefMap[cfg.Blocks.Count];
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
globalDefs[block.Index] = new DefMap();
}
@ -55,11 +55,11 @@ namespace ARMeilleure.Translation
Queue<BasicBlock> dfPhiBlocks = new Queue<BasicBlock>();
// First pass, get all defs and locals uses.
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
Operand[] localDefs = new Operand[RegisterConsts.TotalCount];
LinkedListNode<Node> node = block.Operations.First;
Node node = block.Operations.First;
Operand RenameLocal(Operand operand)
{
@ -75,7 +75,7 @@ namespace ARMeilleure.Translation
while (node != null)
{
if (node.Value is Operation operation)
if (node is Operation operation)
{
for (int index = 0; index < operation.SourcesCount; index++)
{
@ -94,7 +94,7 @@ namespace ARMeilleure.Translation
}
}
node = node.Next;
node = node.ListNext;
}
for (int index = 0; index < RegisterConsts.TotalCount; index++)
@ -126,11 +126,11 @@ namespace ARMeilleure.Translation
}
// Second pass, rename variables with definitions on different blocks.
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
Operand[] localDefs = new Operand[RegisterConsts.TotalCount];
LinkedListNode<Node> node = block.Operations.First;
Node node = block.Operations.First;
Operand RenameGlobal(Operand operand)
{
@ -155,7 +155,7 @@ namespace ARMeilleure.Translation
while (node != null)
{
if (node.Value is Operation operation)
if (node is Operation operation)
{
for (int index = 0; index < operation.SourcesCount; index++)
{
@ -163,7 +163,7 @@ namespace ARMeilleure.Translation
}
}
node = node.Next;
node = node.ListNext;
}
}
}
@ -238,17 +238,17 @@ namespace ARMeilleure.Translation
private static void AddPhi(BasicBlock block, PhiNode phi)
{
LinkedListNode<Node> node = block.Operations.First;
Node node = block.Operations.First;
if (node != null)
{
while (node.Next?.Value is PhiNode)
while (node.ListNext is PhiNode)
{
node = node.Next;
node = node.ListNext;
}
}
if (node?.Value is PhiNode)
if (node is PhiNode)
{
block.Operations.AddAfter(node, phi);
}

8
ARMeilleure/Translation/SsaDeconstruction.cs
View file

@ -9,13 +9,13 @@ namespace ARMeilleure.Translation
{
public static void Deconstruct(ControlFlowGraph cfg)
{
foreach (BasicBlock block in cfg.Blocks)
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
LinkedListNode<Node> node = block.Operations.First;
Node node = block.Operations.First;
while (node?.Value is PhiNode phi)
while (node is PhiNode phi)
{
LinkedListNode<Node> nextNode = node.Next;
Node nextNode = node.ListNext;
Operand local = Local(phi.Destination.Type);