1 files changed, 5 insertions, 0 deletions
diff --git a/third_party/rust/naga/src/back/hlsl/conv.rs b/third_party/rust/naga/src/back/hlsl/conv.rs
index 2a6db35db8..7d15f43f6c 100644
--- a/third_party/rust/naga/src/back/hlsl/conv.rs
+++ b/third_party/rust/naga/src/back/hlsl/conv.rs
@@ -179,6 +179,11 @@ impl crate::BuiltIn {
             // to this field will get replaced with references to `SPECIAL_CBUF_VAR`
             // in `Writer::write_expr`.
             Self::NumWorkGroups => "SV_GroupID",
+            // These builtins map to functions
+            Self::SubgroupSize
+            | Self::SubgroupInvocationId
+            | Self::NumSubgroups
+            | Self::SubgroupId => unreachable!(),
             Self::BaseInstance | Self::BaseVertex | Self::WorkGroupSize => {
                 return Err(Error::Unimplemented(format!("builtin {self:?}")))
             }