https://git.ruby-lang.org/ruby.git/commit/?id=62b471bd44

From 62b471bd441c841e8dedc209512227722dd542e6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@r...>
Date: Mon, 1 Jun 2020 13:26:44 +0900
Subject: vm_call_alias: no call vm_cc_fill

This changeset reduces the generated binary of vm_call_alias from 188
bytes to 149 bytes on my machine, accroding to nm(1).

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index e7e126b..53f2b33 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2682,16 +2682,25 @@ aliased_callable_method_entry(const rb_callable_method_entry_t *me) https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L2682
     return cme;
 }
 
+#define VM_CC_ON_STACK(clazz, call, aux, cme) \
+    (struct rb_callcache) {                   \
+        .flags = T_IMEMO |                    \
+            (imemo_callcache << FL_USHIFT) |  \
+            VM_CALLCACHE_UNMARKABLE,          \
+        .klass = clazz,                       \
+        .cme_  = cme,                         \
+        .call_ = call,                        \
+        .aux_  = aux,                         \
+    }
+
 static VALUE
 vm_call_alias(rb_execution_context_t *ec, rb_control_frame_t *cfp, struct rb_calling_info *calling, struct rb_call_data *cd)
 {
-    const rb_callable_method_entry_t *cme = aliased_callable_method_entry(vm_cc_cme(cd->cc));
-    struct rb_callcache cc_body;
-    struct rb_call_data cd_body = {
+    return vm_call_method_each_type(ec, cfp, calling, &(struct rb_call_data) {
         .ci = cd->ci,
-        .cc = vm_cc_fill(&cc_body, Qundef, cme, 0),
-    };
-    return vm_call_method_each_type(ec, cfp, calling, &cd_body);
+        .cc = &VM_CC_ON_STACK(Qundef, vm_call_general, { 0 },
+            aliased_callable_method_entry(vm_cc_cme(cd->cc))),
+    });
 }
 
 static enum method_missing_reason
-- 
cgit v0.10.2


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