ZJIT: Don't inline non-parameter locals

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_zjit.rb b/test/ruby/test_zjit.rb
index 50ffb6138c..df7d2cf223 100644
--- a/test/ruby/test_zjit.rb
+++ b/test/ruby/test_zjit.rb
@@ -340,6 +340,21 @@ class TestZJIT < Test::Unit::TestCase
     }
   end
 
+  def test_return_nonparam_local
+    # Use dead code (if false) to create a local without initialization instructions.
+    assert_compiles 'nil', %q{
+      def foo(a)
+        if false
+          x = nil
+        end
+        x
+      end
+      def test = foo(1)
+      test
+      test
+    }, call_threshold: 2
+  end
+
   def test_setlocal_on_eval
     assert_compiles '1', %q{
       @b = binding