https://git.ruby-lang.org/ruby.git/commit/?id=9312f4bf62

From 9312f4bf62224cc0a11175cb6f9b7d0dd840a491 Mon Sep 17 00:00:00 2001
From: John Hawthorn <john@h...>
Date: Fri, 11 Mar 2022 11:48:02 -0800
Subject: Allow method caching of protected FCALLs

---
 method.h        | 1 -
 vm_insnhelper.c | 8 ++++----
 vm_insnhelper.h | 9 +++++++--
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/method.h b/method.h
index 2f4504bfec..16d212a1c8 100644
--- a/method.h
+++ b/method.h
@@ -75,7 +75,6 @@ typedef struct rb_callable_method_entry_struct { /* same fields with rb_method_e https://github.com/ruby/ruby/blob/trunk/method.h#L75
 #define METHOD_ENTRY_CACHED_SET(me)          ((me)->flags |= IMEMO_FL_USER4)
 #define METHOD_ENTRY_INVALIDATED(me)         ((me)->flags & IMEMO_FL_USER5)
 #define METHOD_ENTRY_INVALIDATED_SET(me)     ((me)->flags |= IMEMO_FL_USER5)
-#define METHOD_ENTRY_CACHEABLE(me)           !(METHOD_ENTRY_VISI(me) == METHOD_VISI_PROTECTED)
 
 static inline void
 METHOD_ENTRY_VISI_SET(rb_method_entry_t *me, rb_method_visibility_t visi)
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 248a59f642..da04e3521f 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2534,12 +2534,12 @@ vm_callee_setup_arg(rb_execution_context_t *ec, struct rb_calling_info *calling, https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L2534
             if (LIKELY(!(vm_ci_flag(ci) & VM_CALL_TAILCALL))) {
                 CC_SET_FASTPATH(cc, vm_call_iseq_setup_normal_opt_start,
                                 !IS_ARGS_SPLAT(ci) && !IS_ARGS_KEYWORD(ci) &&
-                                cacheable_ci && METHOD_ENTRY_CACHEABLE(vm_cc_cme(cc)));
+                                cacheable_ci && vm_call_cacheable(ci, cc));
             }
             else {
                 CC_SET_FASTPATH(cc, vm_call_iseq_setup_tailcall_opt_start,
                                 !IS_ARGS_SPLAT(ci) && !IS_ARGS_KEYWORD(ci) &&
-                                cacheable_ci && METHOD_ENTRY_CACHEABLE(vm_cc_cme(cc)));
+                                cacheable_ci && vm_call_cacheable(ci, cc));
             }
 
             /* initialize opt vars for self-references */
@@ -2567,7 +2567,7 @@ vm_callee_setup_arg(rb_execution_context_t *ec, struct rb_calling_info *calling, https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L2567
                     args_setup_kw_parameters(ec, iseq, ci_kws, ci_kw_len, ci_keywords, klocals);
 
                     CC_SET_FASTPATH(cc, vm_call_iseq_setup_kwparm_kwarg,
-                                    cacheable_ci && METHOD_ENTRY_CACHEABLE(vm_cc_cme(cc)));
+                                    cacheable_ci && vm_call_cacheable(ci, cc));
 
                     return 0;
                 }
@@ -2580,7 +2580,7 @@ vm_callee_setup_arg(rb_execution_context_t *ec, struct rb_calling_info *calling, https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L2580
                 if (klocals[kw_param->num] == INT2FIX(0)) {
                     /* copy from default_values */
                     CC_SET_FASTPATH(cc, vm_call_iseq_setup_kwparm_nokwarg,
-                                    cacheable_ci && METHOD_ENTRY_CACHEABLE(vm_cc_cme(cc)));
+                                    cacheable_ci && vm_call_cacheable(ci, cc));
                 }
 
                 return 0;
diff --git a/vm_insnhelper.h b/vm_insnhelper.h
index 126867025f..2199ee37cc 100644
--- a/vm_insnhelper.h
+++ b/vm_insnhelper.h
@@ -252,13 +252,18 @@ THROW_DATA_CONSUMED_SET(struct vm_throw_data *obj) https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.h#L252
 #define IS_ARGS_KW_OR_KW_SPLAT(ci) (vm_ci_flag(ci) & (VM_CALL_KWARG | VM_CALL_KW_SPLAT))
 #define IS_ARGS_KW_SPLAT_MUT(ci)   (vm_ci_flag(ci) & VM_CALL_KW_SPLAT_MUT)
 
+static inline bool
+vm_call_cacheable(const struct rb_callinfo *ci, const struct rb_callcache *cc)
+{
+    return (vm_ci_flag(ci) & VM_CALL_FCALL) ||
+        METHOD_ENTRY_VISI(vm_cc_cme(cc)) != METHOD_VISI_PROTECTED;
+}
 /* If this returns true, an optimized function returned by `vm_call_iseq_setup_func`
    can be used as a fastpath. */
 static inline bool
 vm_call_iseq_optimizable_p(const struct rb_callinfo *ci, const struct rb_callcache *cc)
 {
-    return !IS_ARGS_SPLAT(ci) && !IS_ARGS_KEYWORD(ci) &&
-        METHOD_ENTRY_CACHEABLE(vm_cc_cme(cc));
+    return !IS_ARGS_SPLAT(ci) && !IS_ARGS_KEYWORD(ci) && vm_call_cacheable(ci, cc);
 }
 
 #endif /* RUBY_INSNHELPER_H */
-- 
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