4 files changed, 9 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/spirv/emit_context.cpp b/src/shader_recompiler/backend/spirv/emit_context.cpp
index e5d83e9b4..bf2210899 100644
--- a/src/shader_recompiler/backend/spirv/emit_context.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_context.cpp
@@ -790,6 +790,9 @@ void EmitContext::DefineInputs(const Info& info) {
     if (info.uses_local_invocation_id) {
         local_invocation_id = DefineInput(*this, U32[3], spv::BuiltIn::LocalInvocationId);
     }
+    if (info.uses_is_helper_invocation) {
+        is_helper_invocation = DefineInput(*this, U1, spv::BuiltIn::HelperInvocation);
+    }
     if (info.uses_subgroup_mask) {
         subgroup_mask_eq = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupEqMaskKHR);
         subgroup_mask_lt = DefineInput(*this, U32[4], spv::BuiltIn::SubgroupLtMaskKHR);
diff --git a/src/shader_recompiler/backend/spirv/emit_context.h b/src/shader_recompiler/backend/spirv/emit_context.h
index 34f38454f..98a9140bf 100644
--- a/src/shader_recompiler/backend/spirv/emit_context.h
+++ b/src/shader_recompiler/backend/spirv/emit_context.h
@@ -107,6 +107,7 @@ public:
 
     Id workgroup_id{};
     Id local_invocation_id{};
+    Id is_helper_invocation{};
     Id subgroup_local_invocation_id{};
     Id subgroup_mask_eq{};
     Id subgroup_mask_lt{};
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.h b/src/shader_recompiler/backend/spirv/emit_spirv.h
index a3398a605..04340fa70 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv.h
@@ -65,6 +65,7 @@ void EmitSetCFlag(EmitContext& ctx);
 void EmitSetOFlag(EmitContext& ctx);
 Id EmitWorkgroupId(EmitContext& ctx);
 Id EmitLocalInvocationId(EmitContext& ctx);
+Id EmitIsHelperInvocation(EmitContext& ctx);
 Id EmitLoadLocal(EmitContext& ctx, Id word_offset);
 void EmitWriteLocal(EmitContext& ctx, Id word_offset, Id value);
 Id EmitUndefU1(EmitContext& ctx);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
index 5dc150ce2..d552a1b52 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
@@ -274,6 +274,10 @@ Id EmitLocalInvocationId(EmitContext& ctx) {
     return ctx.OpLoad(ctx.U32[3], ctx.local_invocation_id);
 }
 
+Id EmitIsHelperInvocation(EmitContext& ctx) {
+    return ctx.OpLoad(ctx.U1, ctx.is_helper_invocation);
+}
+
 Id EmitLoadLocal(EmitContext& ctx, Id word_offset) {
     const Id pointer{ctx.OpAccessChain(ctx.private_u32, ctx.local_memory, word_offset)};
     return ctx.OpLoad(ctx.U32[1], pointer);