From 49f970d5bd9163e2b4e26a33ef8f84529174d5de Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sun, 25 Oct 2020 17:00:44 -0300
Subject: Implement CAL and RET shader instructions (#1618)

* Add support for CAL and RET shader instructions

* Remove unused stuff

* Fix a bug that could cause the wrong values to be passed to a function

* Avoid repopulating function id dictionary every time

* PR feedback

* Fix vertex shader A/B merge
---
 Ryujinx.Graphics.Shader/Translation/Dominance.cs | 44 ++++--------------------
 1 file changed, 6 insertions(+), 38 deletions(-)

(limited to 'Ryujinx.Graphics.Shader/Translation/Dominance.cs')

diff --git a/Ryujinx.Graphics.Shader/Translation/Dominance.cs b/Ryujinx.Graphics.Shader/Translation/Dominance.cs
index 6a3ff35f..da4a38da 100644
--- a/Ryujinx.Graphics.Shader/Translation/Dominance.cs
+++ b/Ryujinx.Graphics.Shader/Translation/Dominance.cs
@@ -7,50 +7,18 @@ namespace Ryujinx.Graphics.Shader.Translation
     {
         // 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)
+        public static void FindDominators(ControlFlowGraph cfg)
         {
-            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])
+                    while (cfg.PostOrderMap[block1.Index] < cfg.PostOrderMap[block2.Index])
                     {
                         block1 = block1.ImmediateDominator;
                     }
 
-                    while (postOrderMap[block2.Index] < postOrderMap[block1.Index])
+                    while (cfg.PostOrderMap[block2.Index] < cfg.PostOrderMap[block1.Index])
                     {
                         block2 = block2.ImmediateDominator;
                     }
@@ -59,7 +27,7 @@ namespace Ryujinx.Graphics.Shader.Translation
                 return block1;
             }
 
-            entry.ImmediateDominator = entry;
+            cfg.Blocks[0].ImmediateDominator = cfg.Blocks[0];
 
             bool modified;
 
@@ -67,9 +35,9 @@ namespace Ryujinx.Graphics.Shader.Translation
             {
                 modified = false;
 
-                for (int blkIndex = postOrderBlocks.Count - 2; blkIndex >= 0; blkIndex--)
+                for (int blkIndex = cfg.PostOrderBlocks.Length - 2; blkIndex >= 0; blkIndex--)
                 {
-                    BasicBlock block = postOrderBlocks[blkIndex];
+                    BasicBlock block = cfg.PostOrderBlocks[blkIndex];
 
                     BasicBlock newIDom = null;
 
-- 
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