https://git.ruby-lang.org/ruby.git/commit/?id=0483d01f6b

From 0483d01f6bdd3d16b31244a7aaadb4c31f6ecee7 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@g...>
Date: Sat, 9 Nov 2019 21:16:10 -0800
Subject: Test invokebuiltin in test_jit

ISeq#to_a is commented out because it's broken now

diff --git a/test/ruby/test_jit.rb b/test/ruby/test_jit.rb
index a50eac5..bb5727f 100644
--- a/test/ruby/test_jit.rb
+++ b/test/ruby/test_jit.rb
@@ -600,6 +600,12 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L600
     skip "support this in opt_call_c_function (low priority)"
   end
 
+  def test_compile_insn_invokebuiltin
+    # insns = collect_insns(RubyVM::InstructionSequence.of([0].method(:pack)).to_a)
+    # mark_tested_insn(:invokebuiltin, used_insns: insns)
+    assert_eval_with_jit('print [0].pack("c")', stdout: "\x00", success_count: 1)
+  end
+
   def test_jit_output
     out, err = eval_with_jit('5.times { puts "MJIT" }', verbose: 1, min_calls: 5)
     assert_equal("MJIT\n" * 5, out)
@@ -1005,11 +1011,7 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L1011
     # Make sure that the script has insns expected to be tested
     used_insns = method_insns(script)
     insns.each do |insn|
-      unless used_insns.include?(insn)
-        $stderr.puts
-        warn "'#{insn}' insn is not included in the script. Actual insns are: #{used_insns.join(' ')}\n", uplevel: uplevel+2
-      end
-      TestJIT.untested_insns.delete(insn)
+      mark_tested_insn(insn, used_insns: used_insns)
     end
 
     assert_equal(
@@ -1030,6 +1032,14 @@ class TestJIT < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_jit.rb#L1032
     end
   end
 
+  def mark_tested_insn(insn, used_insns:)
+    unless used_insns.include?(insn)
+      $stderr.puts
+      warn "'#{insn}' insn is not included in the script. Actual insns are: #{used_insns.join(' ')}\n", uplevel: uplevel+2
+    end
+    TestJIT.untested_insns.delete(insn)
+  end
+
   # Collect block's insns or defined method's insns, which are expected to be JIT-ed.
   # Note that this intentionally excludes insns in script's toplevel because they are not JIT-ed.
   def method_insns(script)
-- 
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