From 2bfc715828c22032b4a16ff941a41ce83230d369 Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Tue, 14 Jan 2020 21:08:34 -0500
Subject: [PATCH] bls12_381: Remove unnecessary clones

The structs in question all implement Copy.
---
 bls12_381/src/pairings.rs | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/bls12_381/src/pairings.rs b/bls12_381/src/pairings.rs
index 08e792053..ef7180a5e 100644
--- a/bls12_381/src/pairings.rs
+++ b/bls12_381/src/pairings.rs
@@ -46,12 +46,12 @@ impl MillerLoopResult {
         // https://eprint.iacr.org/2009/565.pdf
         #[must_use]
         fn cyclotomic_square(f: Fp12) -> Fp12 {
-            let mut z0 = f.c0.c0.clone();
-            let mut z4 = f.c0.c1.clone();
-            let mut z3 = f.c0.c2.clone();
-            let mut z2 = f.c1.c0.clone();
-            let mut z1 = f.c1.c1.clone();
-            let mut z5 = f.c1.c2.clone();
+            let mut z0 = f.c0.c0;
+            let mut z4 = f.c0.c1;
+            let mut z3 = f.c0.c2;
+            let mut z2 = f.c1.c0;
+            let mut z1 = f.c1.c1;
+            let mut z5 = f.c1.c2;
 
             let (t0, t1) = fp4_square(z0, z1);
 
@@ -113,7 +113,7 @@ impl MillerLoopResult {
             tmp.conjugate()
         }
 
-        let mut f = self.0.clone();
+        let mut f = self.0;
         let mut t0 = f
             .frobenius_map()
             .frobenius_map()
@@ -124,7 +124,7 @@ impl MillerLoopResult {
         Gt(f.invert()
             .map(|mut t1| {
                 let mut t2 = t0 * t1;
-                t1 = t2.clone();
+                t1 = t2;
                 t2 = t2.frobenius_map().frobenius_map();
                 t2 *= t1;
                 t1 = cyclotomic_square(t2).conjugate();