feat: Use take method for naga::Arena

CHANGELOG.md

@@ -133,6 +133,7 @@ By @cwfitzgerald in [#7030](https://github.com/gfx-rs/wgpu/pull/7030).
 - Support @must_use attribute on function declarations. By @turbocrime in [#6801](https://github.com/gfx-rs/wgpu/pull/6801).
 - Support for generating the candidate intersections from AABB geometry, and confirming the hits. By @kvark in [#7047](https://github.com/gfx-rs/wgpu/pull/7047).
 - Make naga::back::spv::Function::to_words write the OpFunctionEnd instruction in itself, instead of making another call after it. By @junjunjd in [#7156](https://github.com/gfx-rs/wgpu/pull/7156).
+- Use take method for Arena to avoid unnecessary cloning. By @junjunjd in [#7176](https://github.com/gfx-rs/wgpu/pull/7176).
 
 ### Changes
 

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

@@ -1040,10 +1040,10 @@ impl<'source, 'temp> Lowerer<'source, 'temp> {
 
     pub fn lower(
         &mut self,
-        tu: &'temp ast::TranslationUnit<'source>,
+        tu: &'temp mut ast::TranslationUnit<'source>,
     ) -> Result<crate::Module, Error<'source>> {
         let mut module = crate::Module {
-            diagnostic_filters: tu.diagnostic_filters.clone(),
+            diagnostic_filters: std::mem::take(&mut tu.diagnostic_filters),
             diagnostic_filter_leaf: tu.diagnostic_filter_leaf,
             ..Default::default()
         };

naga/src/front/wgsl/mod.rs

@@ -40,9 +40,9 @@ impl Frontend {
     }
 
     fn inner<'a>(&mut self, source: &'a str) -> Result<crate::Module, Error<'a>> {
-        let tu = self.parser.parse(source)?;
+        let mut tu = self.parser.parse(source)?;
         let index = index::Index::generate(&tu)?;
-        let module = Lowerer::new(&index).lower(&tu)?;
+        let module = Lowerer::new(&index).lower(&mut tu)?;
 
         Ok(module)
     }