jit_visit.diff

diff --git a/vm/llvm/jit_visit.hpp b/vm/llvm/jit_visit.hpp
index ad91132..fdeebb7 100644
--- a/vm/llvm/jit_visit.hpp
+++ b/vm/llvm/jit_visit.hpp
@@ -2517,7 +2517,6 @@ use_send:
     void visit_cast_for_multi_block_arg() {
       JITStackArgs* inline_args = incoming_args();
       if(inline_args) {
-        if(inline_args->size() == 1) {
         std::vector<Type*> types;
         types.push_back(ctx_->ptr_type("State"));
         types.push_back(CallFrameTy);
@@ -2541,10 +2540,6 @@ use_send:
         check_for_exception(ary);
         stack_push(ary);
-       } else {
-          stack_push(constant(cUndef)); // holder
-          set_hint(cHintLazyBlockArgs);
-        }
      } else {
         Signature sig(ctx_, ObjType);
         sig << StateTy;
         sig << CallFrameTy;

yielded_correctly.rb

# this repro yields the correct result with and without the jit_visit changes

def m
  yield [1, 2, 3]
end

def work
  m { |a, b, c| [a, b, c] }
end

i = 0
while i < 500_000 do 
  work
  i += 1
end

p work

yielded_wrongly.rb

# this repro yielded the wrong result without the jit_visit changes 
# but yields the correct result with the changes

def m
  yield 1, 2, 3
end

def work
  m { |a, b, c| [a, b, c] }
end

i = 0
while i < 500_000 do
  work
  i += 1
end

p work