From 9ad6327fbda8761da8d11b24999e66418228727c Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 9 Dec 2019 23:40:32 -0300
Subject: [PATCH] shader: Keep track of shaders using warp instructions

---
 src/video_core/shader/decode/warp.cpp | 3 +++
 src/video_core/shader/shader_ir.h     | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/src/video_core/shader/decode/warp.cpp b/src/video_core/shader/decode/warp.cpp
index d98d0e1dd..11b77f795 100644
--- a/src/video_core/shader/decode/warp.cpp
+++ b/src/video_core/shader/decode/warp.cpp
@@ -38,6 +38,9 @@ u32 ShaderIR::DecodeWarp(NodeBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 
+    // Signal the backend that this shader uses warp instructions.
+    uses_warps = true;
+
     switch (opcode->get().GetId()) {
     case OpCode::Id::VOTE: {
         const Node value = GetPredicate(instr.vote.value, instr.vote.negate_value != 0);
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 2f71a50d2..580f84fcb 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -137,6 +137,10 @@ public:
         return uses_vertex_id;
     }
 
+    bool UsesWarps() const {
+        return uses_warps;
+    }
+
     bool HasPhysicalAttributes() const {
         return uses_physical_attributes;
     }
@@ -415,6 +419,7 @@ private:
     bool uses_physical_attributes{}; // Shader uses AL2P or physical attribute read/writes
     bool uses_instance_id{};
     bool uses_vertex_id{};
+    bool uses_warps{};
 
     Tegra::Shader::Header header;
 };