remove unnecessary enzyme initialization

Author: sgasho

compiler/rustc_codegen_llvm/src/builder.rs

@@ -1099,13 +1099,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         // vs. copying a struct with mixed types requires different derivative handling.
         // The TypeTree tells Enzyme exactly what memory layout to expect.
         if let Some(tt) = tt {
-            crate::typetree::add_tt(
-                self.cx().llmod,
-                self.cx().llcx,
-                memcpy,
-                tt,
-                &self.cx().tcx.sess.opts.sysroot,
-            );
+            crate::typetree::add_tt(self.cx().llmod, self.cx().llcx, memcpy, tt);
         }
     }
 

compiler/rustc_codegen_llvm/src/builder/autodiff.rs

@@ -375,13 +375,7 @@ pub(crate) fn generate_enzyme_call<'ll, 'tcx>(
     );
 
     if !fnc_tree.args.is_empty() || !fnc_tree.ret.0.is_empty() {
-        crate::typetree::add_tt(
-            cx.llmod,
-            cx.llcx,
-            fn_to_diff,
-            fnc_tree,
-            &builder.cx().tcx.sess.opts.sysroot,
-        );
+        crate::typetree::add_tt(cx.llmod, cx.llcx, fn_to_diff, fnc_tree);
     }
 
     let call = builder.call(enzyme_ty, None, None, ad_fn, &args, None, None);

compiler/rustc_codegen_llvm/src/typetree.rs

@@ -63,7 +63,6 @@ pub(crate) fn add_tt<'ll>(
     llcx: &'ll llvm::Context,
     fn_def: &'ll Value,
     tt: FncTree,
-    sysroot: &rustc_session::config::Sysroot,
 ) {
     let inputs = tt.args;
     let ret_tt: RustTypeTree = tt.ret;
@@ -76,8 +75,6 @@ pub(crate) fn add_tt<'ll>(
     let attr_name = "enzyme_type";
     let c_attr_name = CString::new(attr_name).unwrap();
 
-    drop(EnzymeWrapper::get_or_init(sysroot));
-
     for (i, input) in inputs.iter().enumerate() {
         unsafe {
             let enzyme_tt = to_enzyme_typetree(input.clone(), llvm_data_layout, llcx);