_mjit_compile_send.erb: retry inlining attr_reader

This reverts r63249 (revert r63212) and fixes a bug in it. The test to
prevent the bug is added as well.

vm_insnhelper.c: add `index` argument to vm_getivar. The argument is
created so that MJIT can pass the value of `cc->aux.index` on compilation
time.  The cache invalidation in _mjit_compile_send_guard.erb is only
working for the cache value on compilation time.
Note: As `index` is always passed as constant and it's force-inlined,
the performance of `vm_getivar` won't be degraded in VM.

_mjit_compile_send_guard.erb: New. Used to invalidate inlined values of cc.
common.mk: update dependencies for _mjit_compile_send_guard.erb

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63333 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 31 insertions, 0 deletions

diff --git a/test/ruby/test_jit.rb b/test/ruby/test_jit.rb
index 4699de7d2a..891b7f496f 100644
--- a/test/ruby/test_jit.rb
+++ b/test/ruby/test_jit.rb
@@ -612,6 +612,37 @@ class TestJIT < Test::Unit::TestCase
 
       print(2 * a.test)
     end;
+
+    assert_eval_with_jit("#{<<~"begin;"}\n#{<<~"end;"}", stdout: "true", success_count: 1, min_calls: 2)
+    begin;
+      class Hoge
+        attr_reader :foo
+
+        def initialize
+          @foo = []
+          @bar = nil
+        end
+      end
+
+      class Fuga < Hoge
+        def initialize
+          @bar = nil
+          @foo = []
+        end
+      end
+
+      def test(recv)
+        recv.foo.empty?
+      end
+
+      hoge = Hoge.new
+      fuga = Fuga.new
+
+      test(hoge) # VM: cc set index=1
+      test(hoge) # JIT: compile with index=1
+      test(fuga) # JIT -> VM: cc set index=2
+      print test(hoge) # JIT: should use index=1, not index=2 in cc
+    end;
   end
 
   def test_clean_so