Just disable inlining with local varaible for now

This partially reverts commit 712a66b074.

The previous fix made CI strange like:
http://ci.rvm.jp/results/trunk-vm-asserts@silicon-docker/2124178

Let me just downgrade the behavior for now and deal with it later.

[Bug #15971]

mjit_compile.c

@@ -331,6 +331,19 @@ inlinable_iseq_p(const struct rb_iseq_constant_body *body)
         //   * Do not read any `cfp->pc`
         if (insn != BIN(leave) && insn_may_depend_on_sp_or_pc(insn, body->iseq_encoded + (pos + 1)))
             return false;
+        // At this moment, `cfp->ep` in an inlined method is not working.
+        switch (insn) {
+          case BIN(getlocal):
+          case BIN(getlocal_WC_0):
+          case BIN(getlocal_WC_1):
+          case BIN(setlocal):
+          case BIN(setlocal_WC_0):
+          case BIN(setlocal_WC_1):
+          case BIN(getblockparam):
+          case BIN(getblockparamproxy):
+          case BIN(setblockparam):
+            return false;
+        }
         pos += insn_len(insn);
     }
     return true;

test/ruby/test_jit.rb

@@ -11,6 +11,7 @@ class TestJIT < Test::Unit::TestCase
 
   IGNORABLE_PATTERNS = [
     /\AJIT recompile: .+\n\z/,
+    /\AJIT inline: .+\n\z/,
     /\ASuccessful MJIT finish\n\z/,
   ]
 
@@ -841,6 +842,19 @@ class TestJIT < Test::Unit::TestCase
     end;
   end
 
+  def test_block_handler_with_possible_frame_omitted_inlining
+    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: "70.0\n70.0\n70.0\n", success_count: 2, min_calls: 2)
+    begin;
+      def multiply(a, b)
+        a *= b
+      end
+
+      3.times do
+        p multiply(7.0, 10.0)
+      end
+    end;
+  end
+
   def test_program_counter_with_regexpmatch
     assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: "aa", success_count: 1)
     begin;