From e7130a28d61619170b083f346fb6a79a95637cc9 Mon Sep 17 00:00:00 2001
From: CamilleLaVey <camillelavey99@gmail.com>
Date: Mon, 24 Nov 2025 21:10:32 -0400
Subject: [PATCH] [spir-v, emit] Flat Decoration Adjustment

---
 src/shader_recompiler/backend/spirv/spirv_emit_context.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp b/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
index 66fab21be7..8c7086b55e 100644
--- a/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
+++ b/src/shader_recompiler/backend/spirv/spirv_emit_context.cpp
@@ -1463,7 +1463,9 @@ void EmitContext::DefineInputs(const IR::Program& program) {
         AddCapability(spv::Capability::GroupNonUniform);
         subgroup_local_invocation_id =
             DefineInput(*this, U32[1], false, spv::BuiltIn::SubgroupLocalInvocationId);
-        Decorate(subgroup_local_invocation_id, spv::Decoration::Flat);
+        if (stage == Stage::Fragment) {
+            Decorate(subgroup_local_invocation_id, spv::Decoration::Flat);
+        }
     }
     if (info.uses_fswzadd) {
         const Id f32_one{Const(1.0f)};