From d01118d2617ea6a0c6f32789cee072eb3dbf42ee Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Sun, 19 Mar 2017 18:40:58 +0900
Subject: OP_RESCUE refactored; ref #3519

---
 src/vm.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

(limited to 'src')

diff --git a/src/vm.c b/src/vm.c
index 3e40cecb0..24a0a1db8 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1091,16 +1091,17 @@ RETRY_TRY_BLOCK:
       int c = GETARG_C(i);
       mrb_value exc;
 
+      if (c == 0) {
+        exc = mrb_obj_value(mrb->exc);
+        mrb->exc = 0;
+      }
+      else {           /* continued; exc taken from R(A) */
+        exc = regs[a];
+      }
       if (b != 0) {
         mrb_value e = regs[b];
         struct RClass *ec;
 
-        if (c == 0) {
-          exc = mrb_obj_value(mrb->exc);
-        }
-        else {           /* continued; exc taken from R(A) */
-          exc = regs[a];
-        }
         switch (mrb_type(e)) {
         case MRB_TT_CLASS:
         case MRB_TT_MODULE:
@@ -1110,20 +1111,11 @@ RETRY_TRY_BLOCK:
           break;
         }
         ec = mrb_class_ptr(e);
-        if (mrb_obj_is_kind_of(mrb, exc, ec)) {
-          regs[b] = mrb_true_value();
-        }
-        else {
-          regs[b] = mrb_false_value();
-        }
-      }
-      else if (c == 0) {
-        exc = mrb_obj_value(mrb->exc);
+        regs[b] = mrb_bool_value(mrb_obj_is_kind_of(mrb, exc, ec));
       }
       if (a != 0 && c == 0) {
-        regs[GETARG_A(i)] = exc;
+        regs[a] = exc;
       }
-      mrb->exc = 0;
       NEXT;
     }
 
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