Fix performance regression in debuginfo file_metadata.

Finding the `SourceFile` associated with a `FileName` called `get_source_file` on
the `SourceMap`, which does a linear search through all files in the `SourceMap`.

This resolves the issue by passing the SourceFile in from the caller (which already
had it available).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/librustc_codegen_llvm/debuginfo/create_scope_map.rs b/src/librustc_codegen_llvm/debuginfo/create_scope_map.rs
index e2eae4ac427..7f47b61de3f 100644
--- a/src/librustc_codegen_llvm/debuginfo/create_scope_map.rs
+++ b/src/librustc_codegen_llvm/debuginfo/create_scope_map.rs
@@ -76,7 +76,7 @@ fn make_mir_scope(
     }
 
     let loc = cx.lookup_debug_loc(scope_data.span.lo());
-    let file_metadata = file_metadata(cx, &loc.file.name, debug_context.defining_crate);
+    let file_metadata = file_metadata(cx, &loc.file, debug_context.defining_crate);
 
     let scope_metadata = unsafe {
         Some(llvm::LLVMRustDIBuilderCreateLexicalBlock(