YJIT: Add support for ruby array cfuncs (argc=-2)

This adds support for cfuncs which take variable arguments using a Ruby
array. This is specified with the method entry's argc == -2.

1 files changed, 20 insertions, 0 deletions

diff --git a/bootstraptest/test_yjit.rb b/bootstraptest/test_yjit.rb
index 47744efb73..a52ed8027d 100644
--- a/bootstraptest/test_yjit.rb
+++ b/bootstraptest/test_yjit.rb
@@ -2766,3 +2766,23 @@ assert_equal 'ok', %q{
   foo(s) rescue :ok
   foo(s) rescue :ok
 }
+
+# File.join is a cfunc accepting variable arguments as a Ruby array (argc = -2)
+assert_equal 'foo/bar', %q{
+  def foo
+    File.join("foo", "bar")
+  end
+
+  foo
+  foo
+}
+
+# File.join is a cfunc accepting variable arguments as a Ruby array (argc = -2)
+assert_equal '', %q{
+  def foo
+    File.join()
+  end
+
+  foo
+  foo
+}