From a1d32af91692c2b624e9c04fcd94aa958dbba626 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Fri, 21 Apr 2017 11:50:32 +0900
Subject: Simplify pointer calculation in `envadjust`.

---
 src/vm.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index d60e90f72..c6eed6e56 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -118,16 +118,16 @@ static inline void
 envadjust(mrb_state *mrb, mrb_value *oldbase, mrb_value *newbase)
 {
   mrb_callinfo *ci = mrb->c->cibase;
+  ptrdiff_t off;
 
   if (newbase == oldbase) return;
+  off = newbase - oldbase;
   while (ci <= mrb->c->ci) {
     struct REnv *e = ci->env;
     if (e && MRB_ENV_STACK_SHARED_P(e)) {
-      ptrdiff_t off = e->stack - oldbase;
-
-      e->stack = newbase + off;
+      e->stack += off;
     }
-    ci->stackent = newbase + (ci->stackent - oldbase);
+    ci->stackent += off;
     ci++;
   }
 }
-- 
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