`vm_call_single_noarg_inline_builtin`

If the iseq only contains `opt_invokebuiltin_delegate_leave` insn and
the builtin-function (bf) is inline-able, the caller doesn't need to
build a method frame.

`vm_call_single_noarg_inline_builtin` is fast path for such cases.

1 files changed, 26 insertions, 0 deletions

diff --git a/vm_callinfo.h b/vm_callinfo.h
index 1edeee1f56..bf34908eea 100644
--- a/vm_callinfo.h
+++ b/vm_callinfo.h
@@ -290,6 +290,7 @@ struct rb_callcache {
         } attr;
         const enum method_missing_reason method_missing_reason; /* used by method_missing */
         VALUE v;
+        const struct rb_builtin_function *bf;
     } aux_;
 };
 
@@ -439,6 +440,9 @@ vm_cc_valid_p(const struct rb_callcache *cc, const rb_callable_method_entry_t *c
 
 /* callcache: mutate */
 
+#define VM_CALLCACH_IVAR IMEMO_FL_USER0
+#define VM_CALLCACH_BF IMEMO_FL_USER1
+
 static inline void
 vm_cc_call_set(const struct rb_callcache *cc, vm_call_handler call)
 {
@@ -458,6 +462,13 @@ vm_cc_attr_index_set(const struct rb_callcache *cc, attr_index_t index, shape_id
     VM_ASSERT(IMEMO_TYPE_P(cc, imemo_callcache));
     VM_ASSERT(cc != vm_cc_empty());
     *attr_value = (attr_index_t)(index + 1) | ((uintptr_t)(dest_shape_id) << SHAPE_FLAG_SHIFT);
+    *(VALUE *)&cc->flags |= VM_CALLCACH_IVAR;
+}
+
+static inline bool
+vm_cc_ivar_p(const struct rb_callcache *cc)
+{
+    return (cc->flags & VM_CALLCACH_IVAR) != 0;
 }
 
 static inline void
@@ -481,6 +492,21 @@ vm_cc_method_missing_reason_set(const struct rb_callcache *cc, enum method_missi
 }
 
 static inline void
+vm_cc_bf_set(const struct rb_callcache *cc, const struct rb_builtin_function *bf)
+{
+    VM_ASSERT(IMEMO_TYPE_P(cc, imemo_callcache));
+    VM_ASSERT(cc != vm_cc_empty());
+    *(const struct rb_builtin_function **)&cc->aux_.bf = bf;
+    *(VALUE *)&cc->flags |= VM_CALLCACH_BF;
+}
+
+static inline bool
+vm_cc_bf_p(const struct rb_callcache *cc)
+{
+    return (cc->flags & VM_CALLCACH_BF) != 0;
+}
+
+static inline void
 vm_cc_invalidate(const struct rb_callcache *cc)
 {
     VM_ASSERT(IMEMO_TYPE_P(cc, imemo_callcache));