diff --git a/src/nouveau/compiler/nak/to_cssa.rs b/src/nouveau/compiler/nak/to_cssa.rs
index 6846ecc1f22..94eab3237e7 100644
--- a/src/nouveau/compiler/nak/to_cssa.rs
+++ b/src/nouveau/compiler/nak/to_cssa.rs
@@ -236,8 +236,8 @@ impl<'a> CoalesceGraph<'a> {
     }
 
     pub fn sets_merge(&mut self, a: usize, b: usize) -> usize {
-        let a_nodes = std::mem::replace(&mut self.sets[a].nodes, Vec::new());
-        let b_nodes = std::mem::replace(&mut self.sets[b].nodes, Vec::new());
+        let a_nodes = std::mem::take(&mut self.sets[a].nodes);
+        let b_nodes = std::mem::take(&mut self.sets[b].nodes);
         let nodes = MergedIter::new(a_nodes.into_iter(), b_nodes.into_iter());
 
         self.sets[a].nodes = nodes
@@ -315,8 +315,7 @@ impl Function {
         cg.init_sets(&self.blocks);
 
         for bi in 0..self.blocks.len() {
-            let block_instrs =
-                std::mem::replace(&mut self.blocks[bi].instrs, Vec::new());
+            let block_instrs = std::mem::take(&mut self.blocks[bi].instrs);
 
             let mut instrs = Vec::new();
             for mut instr in block_instrs.into_iter() {