From: Raymond Hettinger <python@rcn.com>
Date: Sun, 24 Jan 2016 19:32:07 +0000 (-0800)
Subject: Convert two other post-decrement while-loops to pre-decrements for consistency
X-Git-Tag: v3.6.0a1~701
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=165eee214bc388eb588db33385ca49ddbb305565;p=python

Convert two other post-decrement while-loops to pre-decrements for consistency
and for better code generation.
---

diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 3ab987daee..cc9e4e890e 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -937,7 +937,8 @@ deque_count(dequeobject *deque, PyObject *v)
     PyObject *item;
     int cmp;
 
-    while (n--) {
+    n++;
+    while (--n) {
         CHECK_NOT_END(b);
         item = b->data[index];
         cmp = PyObject_RichCompareBool(item, v, Py_EQ);
@@ -974,7 +975,8 @@ deque_contains(dequeobject *deque, PyObject *v)
     PyObject *item;
     int cmp;
 
-    while (n--) {
+    n++;
+    while (--n) {
         CHECK_NOT_END(b);
         item = b->data[index];
         cmp = PyObject_RichCompareBool(item, v, Py_EQ);