From c533295cc17d9610a8523b67c2ae435ded6bdae4 Mon Sep 17 00:00:00 2001
From: Brendan Hansknecht <brendan.hansknecht@gmail.com>
Date: Fri, 18 Feb 2022 16:32:48 -0800
Subject: [PATCH] remove redundant move

---
 compiler/gen_dev/src/generic64/x86_64.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/compiler/gen_dev/src/generic64/x86_64.rs b/compiler/gen_dev/src/generic64/x86_64.rs
index 26c606f90a..b2abb1dcf6 100644
--- a/compiler/gen_dev/src/generic64/x86_64.rs
+++ b/compiler/gen_dev/src/generic64/x86_64.rs
@@ -1353,6 +1353,9 @@ fn mov_reg64_base64_offset32(
 /// `MOVSD xmm1,xmm2` -> Move scalar double-precision floating-point value from xmm2 to xmm1 register.
 #[inline(always)]
 fn movsd_freg64_freg64(buf: &mut Vec<'_, u8>, dst: X86_64FloatReg, src: X86_64FloatReg) {
+    if dst == src {
+        return;
+    }
     let dst_high = dst as u8 > 7;
     let dst_mod = dst as u8 % 8;
     let src_high = src as u8 > 7;