ZJIT: Parse opt_regexpmatch2 into HIR

Author: XrXr

test/ruby/test_zjit.rb

@@ -240,6 +240,13 @@ def test(obj) = !obj
     RUBY
   end
 
+  def test_opt_regexpmatch2
+    assert_compiles('[1, nil]', <<~RUBY, insns: [:opt_regexpmatch2])
+      def test(haystack) = /needle/ =~ haystack
+      return test("kneedle"), test("")
+    RUBY
+  end
+
   def test_opt_ge
     assert_compiles '[false, true, true]', %q{
       def test(a, b) = a >= b

zjit/src/hir.rs

@@ -2350,6 +2350,7 @@ pub fn iseq_to_hir(iseq: *const rb_iseq_t) -> Result<Function, ParseError> {
                 YARVINSN_opt_and |
                 YARVINSN_opt_or |
                 YARVINSN_opt_not |
+                YARVINSN_opt_regexpmatch2 |
                 YARVINSN_opt_send_without_block => {
                     let cd: *const rb_call_data = get_arg(pc, 0).as_ptr();
                     let call_info = unsafe { rb_get_call_data_ci(cd) };
@@ -3818,6 +3819,20 @@ mod tests {
               Return v4
         "#]]);
     }
+
+    #[test]
+    fn opt_regexpmatch2() {
+        eval("
+            def test(regexp, matchee) = regexp =~ matchee
+        ");
+        assert_method_hir_with_opcode("test", YARVINSN_opt_regexpmatch2, expect![[r#"
+            fn test:
+            bb0(v0:BasicObject, v1:BasicObject, v2:BasicObject):
+              v5:BasicObject = SendWithoutBlock v1, :=~, v2
+              Return v5
+        "#]]);
+    }
+
     #[test]
     fn test_branchnil() {
         eval("