Remove unused LLVMModuleRef argument

Author: QnnOkabayashi

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -683,7 +683,7 @@ pub(crate) unsafe fn llvm_optimize(
         // Here we map the old arguments to the new arguments, with an offset of 1 to make sure
         // that we don't use the newly added `%dyn_ptr`.
         unsafe {
-            llvm::LLVMRustOffloadMapper(cx.llmod(), old_fn, new_fn);
+            llvm::LLVMRustOffloadMapper(old_fn, new_fn);
         }
 
         llvm::set_linkage(new_fn, llvm::get_linkage(old_fn));

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -2025,7 +2025,7 @@ unsafe extern "C" {
     ) -> &Attribute;
 
     // Operations on functions
-    pub(crate) fn LLVMRustOffloadMapper<'a>(M: &'a Module, Fn: &'a Value, Fn: &'a Value);
+    pub(crate) fn LLVMRustOffloadMapper<'a>(Fn: &'a Value, Fn: &'a Value);
     pub(crate) fn LLVMRustGetOrInsertFunction<'a>(
         M: &'a Module,
         Name: *const c_char,

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -144,9 +144,7 @@ extern "C" void LLVMRustPrintStatistics(RustStringRef OutBuf) {
   llvm::PrintStatistics(OS);
 }
 
-extern "C" void LLVMRustOffloadMapper(LLVMModuleRef M, LLVMValueRef OldFn,
-                                      LLVMValueRef NewFn) {
-  llvm::Module *module = llvm::unwrap(M);
+extern "C" void LLVMRustOffloadMapper(LLVMValueRef OldFn, LLVMValueRef NewFn) {
   llvm::Function *oldFn = llvm::unwrap<llvm::Function>(OldFn);
   llvm::Function *newFn = llvm::unwrap<llvm::Function>(NewFn);