Add support for fragment shader interlock (#2768)

* Support coherent images

* Add support for fragment shader interlock

* Change to tree based match approach

* Refactor + check for branch targets and external registers

* Make detection more robust

* Use Intel fragment shader ordering if interlock is not available, use nothing if both are not available

* Remove unused field

1 files changed, 6 insertions, 1 deletions

diff --git a/Ryujinx.Graphics.Shader/CodeGen/Glsl/GlslGenerator.cs b/Ryujinx.Graphics.Shader/CodeGen/Glsl/GlslGenerator.cs
index 077737c8..3af120f8 100644
--- a/Ryujinx.Graphics.Shader/CodeGen/Glsl/GlslGenerator.cs
+++ b/Ryujinx.Graphics.Shader/CodeGen/Glsl/GlslGenerator.cs
@@ -117,7 +117,12 @@ namespace Ryujinx.Graphics.Shader.CodeGen.Glsl
             {
                 if (node is AstOperation operation)
                 {
-                    context.AppendLine(InstGen.GetExpression(context, operation) + ";");
+                    string expr = InstGen.GetExpression(context, operation);
+
+                    if (expr != null)
+                    {
+                        context.AppendLine(expr + ";");
+                    }
                 }
                 else if (node is AstAssignment assignment)
                 {