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authorgdk <gab.dark.100@gmail.com>2019-10-13 03:02:07 -0300
committerThog <thog@protonmail.com>2020-01-09 02:13:00 +0100
commit1876b346fea647e8284a66bb6d62c38801035cff (patch)
tree6eeff094298cda84d1613dc5ec0691e51d7b35f1 /Ryujinx.Graphics/Shader/Translation/Dominance.cs
parentf617fb542a0e3d36012d77a4b5acbde7b08902f2 (diff)
Initial work
Diffstat (limited to 'Ryujinx.Graphics/Shader/Translation/Dominance.cs')
-rw-r--r--Ryujinx.Graphics/Shader/Translation/Dominance.cs127
1 files changed, 0 insertions, 127 deletions
diff --git a/Ryujinx.Graphics/Shader/Translation/Dominance.cs b/Ryujinx.Graphics/Shader/Translation/Dominance.cs
deleted file mode 100644
index 6a3ff35f..00000000
--- a/Ryujinx.Graphics/Shader/Translation/Dominance.cs
+++ /dev/null
@@ -1,127 +0,0 @@
-using Ryujinx.Graphics.Shader.IntermediateRepresentation;
-using System.Collections.Generic;
-
-namespace Ryujinx.Graphics.Shader.Translation
-{
- static class Dominance
- {
- // Those methods are an implementation of the algorithms on "A Simple, Fast Dominance Algorithm".
- // https://www.cs.rice.edu/~keith/EMBED/dom.pdf
- public static void FindDominators(BasicBlock entry, int blocksCount)
- {
- HashSet<BasicBlock> visited = new HashSet<BasicBlock>();
-
- Stack<BasicBlock> blockStack = new Stack<BasicBlock>();
-
- List<BasicBlock> postOrderBlocks = new List<BasicBlock>(blocksCount);
-
- int[] postOrderMap = new int[blocksCount];
-
- visited.Add(entry);
-
- blockStack.Push(entry);
-
- while (blockStack.TryPop(out BasicBlock block))
- {
- if (block.Next != null && visited.Add(block.Next))
- {
- blockStack.Push(block);
- blockStack.Push(block.Next);
- }
- else if (block.Branch != null && visited.Add(block.Branch))
- {
- blockStack.Push(block);
- blockStack.Push(block.Branch);
- }
- else
- {
- postOrderMap[block.Index] = postOrderBlocks.Count;
-
- postOrderBlocks.Add(block);
- }
- }
-
- BasicBlock Intersect(BasicBlock block1, BasicBlock block2)
- {
- while (block1 != block2)
- {
- while (postOrderMap[block1.Index] < postOrderMap[block2.Index])
- {
- block1 = block1.ImmediateDominator;
- }
-
- while (postOrderMap[block2.Index] < postOrderMap[block1.Index])
- {
- block2 = block2.ImmediateDominator;
- }
- }
-
- return block1;
- }
-
- entry.ImmediateDominator = entry;
-
- bool modified;
-
- do
- {
- modified = false;
-
- for (int blkIndex = postOrderBlocks.Count - 2; blkIndex >= 0; blkIndex--)
- {
- BasicBlock block = postOrderBlocks[blkIndex];
-
- BasicBlock newIDom = null;
-
- foreach (BasicBlock predecessor in block.Predecessors)
- {
- if (predecessor.ImmediateDominator != null)
- {
- if (newIDom != null)
- {
- newIDom = Intersect(predecessor, newIDom);
- }
- else
- {
- newIDom = predecessor;
- }
- }
- }
-
- if (block.ImmediateDominator != newIDom)
- {
- block.ImmediateDominator = newIDom;
-
- modified = true;
- }
- }
- }
- while (modified);
- }
-
- public static void FindDominanceFrontiers(BasicBlock[] blocks)
- {
- for (int blkIndex = 0; blkIndex < blocks.Length; blkIndex++)
- {
- BasicBlock block = blocks[blkIndex];
-
- if (block.Predecessors.Count < 2)
- {
- continue;
- }
-
- for (int pBlkIndex = 0; pBlkIndex < block.Predecessors.Count; pBlkIndex++)
- {
- BasicBlock current = block.Predecessors[pBlkIndex];
-
- while (current != block.ImmediateDominator)
- {
- current.DominanceFrontiers.Add(block);
-
- current = current.ImmediateDominator;
- }
- }
- }
- }
- }
-} \ No newline at end of file