remove outdated *First autodiff variants for higher-order ad

2025-02-10 01:35:53 -05:00
parent 1221cff551
commit 061abbc369
3 changed files with 6 additions and 22 deletions
--- a/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
+++ b/compiler/rustc_codegen_ssa/src/codegen_attrs.rs
@@ -916,8 +916,6 @@ fn autodiff_attrs(tcx: TyCtxt<'_>, id: DefId) -> Option<AutoDiffAttrs> {
    let mode = match mode.as_str() {
        "Forward" => DiffMode::Forward,
        "Reverse" => DiffMode::Reverse,
-        "ForwardFirst" => DiffMode::ForwardFirst,
-        "ReverseFirst" => DiffMode::ReverseFirst,
        _ => {
            span_bug!(mode.span, "rustc_autodiff attribute contains invalid mode");
        }