perf: wgsl::…::Lowerer::lower: don't clone diagnostic_filters are…

…na (gfx-rs#7176)

Co-authored-by: Erich Gubler <[email protected]>

naga/src/front/wgsl/lower/mod.rs

@@ -1049,10 +1049,10 @@ impl<'source, 'temp> Lowerer<'source, 'temp> {
 
     pub fn lower(
         &mut self,
-        tu: &'temp ast::TranslationUnit<'source>,
+        tu: ast::TranslationUnit<'source>,
     ) -> Result<crate::Module, Error<'source>> {
         let mut module = crate::Module {
-            diagnostic_filters: tu.diagnostic_filters.clone(),
+            diagnostic_filters: tu.diagnostic_filters,
             diagnostic_filter_leaf: tu.diagnostic_filter_leaf,
             ..Default::default()
         };

naga/src/front/wgsl/mod.rs

@@ -42,7 +42,7 @@ impl Frontend {
     fn inner<'a>(&mut self, source: &'a str) -> Result<crate::Module, Error<'a>> {
         let tu = self.parser.parse(source)?;
         let index = index::Index::generate(&tu)?;
-        let module = Lowerer::new(&index).lower(&tu)?;
+        let module = Lowerer::new(&index).lower(tu)?;
 
         Ok(module)
     }