From a49333cd87d0c764167107a4c5277ae214ae657e Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 5 Jul 2022 18:59:40 +0200
Subject: [PATCH] [dxvk] Add pass to check whether a shader has spec constants

Pipeline libraries cannot be used for shaders with user spec constants.
---
 src/dxvk/dxvk_shader.cpp | 3 +++
 src/dxvk/dxvk_shader.h   | 1 +
 2 files changed, 4 insertions(+)

diff --git a/src/dxvk/dxvk_shader.cpp b/src/dxvk/dxvk_shader.cpp
index 6fa9338f..aca093b2 100644
--- a/src/dxvk/dxvk_shader.cpp
+++ b/src/dxvk/dxvk_shader.cpp
@@ -115,6 +115,9 @@ namespace dxvk {
           bindingOffsets[varId].setOffset = ins.offset() + 3;
         }
 
+        if (ins.arg(2) == spv::DecorationSpecId && ins.arg(3) < MaxNumSpecConstants)
+          m_flags.set(DxvkShaderFlag::HasSpecConstants);
+
         if (ins.arg(2) == spv::DecorationLocation && ins.arg(3) == 1) {
           m_o1LocOffset = ins.offset() + 3;
           o1VarId = ins.arg(1);
diff --git a/src/dxvk/dxvk_shader.h b/src/dxvk/dxvk_shader.h
index 40e2023b..56e0f6f5 100644
--- a/src/dxvk/dxvk_shader.h
+++ b/src/dxvk/dxvk_shader.h
@@ -39,6 +39,7 @@ namespace dxvk {
   enum DxvkShaderFlag : uint64_t {
     HasSampleRateShading,
     HasTransformFeedback,
+    HasSpecConstants,
     ExportsStencilRef,
     ExportsViewportIndexLayerFromVertexStage,
   };