Fix correctness of optimization

2020-01-25 16:24:15 +01:00 · 2020-01-25 16:24:15 +01:00 · 242f2e3c75
commit 242f2e3c75
parent 9cfb9470c5
1 changed files with 1 additions and 1 deletions
--- a/src/abi/mod.rs
+++ b/src/abi/mod.rs
@ -363,7 +363,7 @@ pub fn codegen_fn_prelude(fx: &mut FunctionCx<'_, '_, impl Backend>, start_ebb:
                        ParamEnv::reveal_all(),
                        local_decl.source_info.span,
                    );
-                    if local_decl.mutability == mir::Mutability::Not && internally_mutable {
+                    if local_decl.mutability == mir::Mutability::Not && !internally_mutable {
                        // We wont mutate this argument, so it is fine to borrow the backing storage
                        // of this argument, to prevent a copy.