https://git.ruby-lang.org/ruby.git/commit/?id=c2b1934475

From c2b1934475bd2494b47b2441ac89188215fa60cc Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Fri, 3 Sep 2021 17:07:16 -0700
Subject: Add tests against opt_eq side exits

---
 test/ruby/test_yjit.rb | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/test/ruby/test_yjit.rb b/test/ruby/test_yjit.rb
index 90940009e2..4307a7dfb6 100644
--- a/test/ruby/test_yjit.rb
+++ b/test/ruby/test_yjit.rb
@@ -63,6 +63,48 @@ class TestYJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_yjit.rb#L63
     assert_compiles('-"foo" == -"bar"', insns: %i[opt_eq], result: false)
   end
 
+  def test_compile_eq_symbol
+    assert_compiles(':foo == :foo', insns: %i[opt_eq], result: true)
+    assert_compiles(':foo == :bar', insns: %i[opt_eq], result: false)
+    assert_compiles(':foo == "foo".to_sym', insns: %i[opt_eq], result: true)
+  end
+
+  def test_compile_eq_object
+    assert_compiles(<<~RUBY, insns: %i[opt_eq], result: false)
+      def eq(a, b)
+        a == b
+      end
+
+      eq(Object.new, Object.new)
+    RUBY
+
+    assert_compiles(<<~RUBY, insns: %i[opt_eq], result: true)
+      def eq(a, b)
+        a == b
+      end
+
+      obj = Object.new
+      eq(obj, obj)
+    RUBY
+  end
+
+  def test_compile_eq_arbitrary_class
+    assert_compiles(<<~RUBY, insns: %i[opt_eq], result: "yes")
+      def eq(a, b)
+        a == b
+      end
+
+      class Foo
+        def ==(other)
+          "yes"
+        end
+      end
+
+      eq(Foo.new, Foo.new)
+      eq(Foo.new, Foo.new)
+    RUBY
+  end
+
   def test_compile_set_and_get_global
     assert_compiles('$foo = 123; $foo', insns: %i[setglobal], result: 123)
   end
-- 
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