fix inline method cache for refinements

inline_method_cache_fix.diff

diff --git a/compile.c b/compile.c
index 16bfcef..eb824ca 100644
--- a/compile.c
+++ b/compile.c
@@ -954,6 +954,7 @@ new_callinfo(rb_iseq_t *iseq, ID mid, int argc, VALUE block, unsigned long flag)
 	}
     }
     ci->vmstat = 0;
+    ci->refinements = Qundef;
     ci->blockptr = 0;
     ci->recv = Qundef;
     ci->call = 0; /* TODO: should set default function? */
diff --git a/vm_core.h b/vm_core.h
index dd9e387..82400a3 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -153,6 +153,7 @@ typedef struct rb_call_info_struct {
     /* inline cache: keys */
     VALUE vmstat;
     VALUE klass;
+    VALUE refinements;
 
     /* inline cache: values */
     const rb_method_entry_t *me;
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 554aad4..cf64c14 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -843,19 +843,30 @@ static void
 vm_search_method(rb_call_info_t *ci, VALUE recv)
 {
     VALUE klass = CLASS_OF(recv);
+    NODE *cref = rb_vm_cref();
+    VALUE refinements = Qnil;
+
+    if (cref && !NIL_P(cref->nd_refinements)) {
+	refinements = cref->nd_refinements;
+    }
 
 #if OPT_INLINE_METHOD_CACHE
-    if (LIKELY(GET_VM_STATE_VERSION() == ci->vmstat && klass == ci->klass)) {
+    if (LIKELY(GET_VM_STATE_VERSION() == ci->vmstat && klass == ci->klass &&
+	       refinements == ci->refinements)) {
 	/* cache hit! */
     }
     else {
-	ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
+	ci->me = rb_method_entry_get_with_refinements(refinements, klass,
+						      ci->mid,
+						      &ci->defined_class);
 	ci->klass = klass;
+	ci->refinements = refinements;
 	ci->vmstat = GET_VM_STATE_VERSION();
 	ci->call = vm_call_general;
     }
 #else
-    ci->me = rb_method_entry(klass, ci->mid, &ci->defined_class);
+    ci->me = rb_method_entry_get_with_refinements(refinements, klass, ci->mid,
+						  &ci->defined_class);
     ci->call = vm_call_general;
     ci->klass = klass;
 #endif