From cd2da0941035c231bc95007a269b6dc3d4b62ca9 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Tue, 15 Nov 2022 21:59:38 -0800
Subject: [PATCH] MJIT: Refactor BitField dereference a little

---
 lib/mjit/c_pointer.rb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/mjit/c_pointer.rb b/lib/mjit/c_pointer.rb
index 7dd836f1c9..aadf80e804 100644
--- a/lib/mjit/c_pointer.rb
+++ b/lib/mjit/c_pointer.rb
@@ -282,12 +282,11 @@ module RubyVM::MJIT
 
       # Dereference
       def *
+        byte = Fiddle::Pointer.new(@addr)[0, Fiddle::SIZEOF_CHAR].unpack('c').first
         if @width == 1
-          byte = Fiddle::Pointer.new(@addr)[0, Fiddle::SIZEOF_CHAR].unpack('c').first
           bit = (1 & (byte >> @offset))
           bit == 1
         elsif @width <= 8 && @offset == 0
-          byte = Fiddle::Pointer.new(@addr)[0, Fiddle::SIZEOF_CHAR].unpack('c').first
           bitmask = @width.times.map { |i| 1 << i }.sum
           byte & bitmask
         else