ryujinx/ARMeilleure/Translation/SsaDeconstruction.cs
gdkchan e5f78fb1d4
Replace LinkedList by IntrusiveList to avoid allocations on JIT (#931)
* Replace LinkedList by IntrusiveList to avoid allocations on JIT

* Fix wrong replacements
2020-02-17 22:30:54 +01:00

46 lines
1.3 KiB
C#

using ARMeilleure.IntermediateRepresentation;
using System.Collections.Generic;
using static ARMeilleure.IntermediateRepresentation.OperandHelper;
namespace ARMeilleure.Translation
{
static partial class Ssa
{
public static void Deconstruct(ControlFlowGraph cfg)
{
for (BasicBlock block = cfg.Blocks.First; block != null; block = block.ListNext)
{
Node node = block.Operations.First;
while (node is PhiNode phi)
{
Node nextNode = node.ListNext;
Operand local = Local(phi.Destination.Type);
for (int index = 0; index < phi.SourcesCount; index++)
{
BasicBlock predecessor = phi.GetBlock(index);
Operand source = phi.GetSource(index);
predecessor.Append(new Operation(Instruction.Copy, local, source));
phi.SetSource(index, null);
}
Operation copyOp = new Operation(Instruction.Copy, phi.Destination, local);
block.Operations.AddBefore(node, copyOp);
phi.Destination = null;
block.Operations.Remove(node);
node = nextNode;
}
}
}
}
}