Remove unused config param from WriteBackendMethods::autodiff

Author: bjorn3

compiler/rustc_codegen_gcc/src/lib.rs

@@ -437,7 +437,6 @@ impl WriteBackendMethods for GccCodegenBackend {
         _cgcx: &CodegenContext<Self>,
         _module: &ModuleCodegen<Self::Module>,
         _diff_functions: Vec<AutoDiffItem>,
-        _config: &ModuleConfig,
     ) -> Result<(), FatalError> {
         unimplemented!()
     }

compiler/rustc_codegen_llvm/src/builder/autodiff.rs

@@ -2,7 +2,6 @@ use std::ptr;
 
 use rustc_ast::expand::autodiff_attrs::{AutoDiffAttrs, AutoDiffItem, DiffActivity, DiffMode};
 use rustc_codegen_ssa::ModuleCodegen;
-use rustc_codegen_ssa::back::write::ModuleConfig;
 use rustc_codegen_ssa::common::TypeKind;
 use rustc_codegen_ssa::traits::BaseTypeCodegenMethods;
 use rustc_errors::FatalError;
@@ -461,7 +460,6 @@ pub(crate) fn differentiate<'ll>(
     module: &'ll ModuleCodegen<ModuleLlvm>,
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     diff_items: Vec<AutoDiffItem>,
-    _config: &ModuleConfig,
 ) -> Result<(), FatalError> {
     for item in &diff_items {
         trace!("{}", item);

compiler/rustc_codegen_llvm/src/lib.rs

@@ -231,13 +231,12 @@ impl WriteBackendMethods for LlvmCodegenBackend {
         cgcx: &CodegenContext<Self>,
         module: &ModuleCodegen<Self::Module>,
         diff_fncs: Vec<AutoDiffItem>,
-        config: &ModuleConfig,
     ) -> Result<(), FatalError> {
         if cgcx.lto != Lto::Fat {
             let dcx = cgcx.create_dcx();
             return Err(dcx.handle().emit_almost_fatal(AutoDiffWithoutLTO));
         }
-        builder::autodiff::differentiate(module, cgcx, diff_fncs, config)
+        builder::autodiff::differentiate(module, cgcx, diff_fncs)
     }
 }
 

compiler/rustc_codegen_ssa/src/back/write.rs

@@ -999,8 +999,7 @@ fn execute_fat_lto_work_item<B: ExtraBackendMethods>(
         B::run_fat_lto(cgcx, needs_fat_lto, import_only_modules).unwrap_or_else(|e| e.raise());
 
     if !autodiff.is_empty() {
-        let config = cgcx.config(ModuleKind::Regular);
-        if let Err(err) = B::autodiff(cgcx, &module, autodiff, config) {
+        if let Err(err) = B::autodiff(cgcx, &module, autodiff) {
             err.raise();
         }
     }

compiler/rustc_codegen_ssa/src/traits/write.rs

@@ -65,7 +65,6 @@ pub trait WriteBackendMethods: Clone + 'static {
         cgcx: &CodegenContext<Self>,
         module: &ModuleCodegen<Self::Module>,
         diff_fncs: Vec<AutoDiffItem>,
-        config: &ModuleConfig,
     ) -> Result<(), FatalError>;
 }