codegen and write_metadata can mutate ModuleLLvm.

Author: gabi-250

src/librustc_codegen_llvm/allocator.rs

@@ -9,7 +9,7 @@ use rustc_allocator::{ALLOCATOR_METHODS, AllocatorTy};
 use crate::ModuleLlvm;
 use crate::llvm::{self, False, True};
 
-pub(crate) unsafe fn codegen(tcx: TyCtxt, mods: &ModuleLlvm, kind: AllocatorKind) {
+pub(crate) unsafe fn codegen(tcx: TyCtxt, mods: &mut ModuleLlvm, kind: AllocatorKind) {
     let llcx = &*mods.llcx;
     let llmod = mods.llmod();
     let usize = match &tcx.sess.target.target.target_pointer_width[..] {

src/librustc_codegen_llvm/base.rs

@@ -46,7 +46,7 @@ use crate::value::Value;
 
 pub fn write_metadata<'a, 'gcx>(
     tcx: TyCtxt<'a, 'gcx, 'gcx>,
-    llvm_module: &ModuleLlvm
+    llvm_module: &mut ModuleLlvm
 ) -> EncodedMetadata {
     use std::io::Write;
     use flate2::Compression;