From: Karl Williamson <public@khwilliamson.com>
Date: Thu, 27 Dec 2012 22:26:01 +0000 (-0700)
Subject: regcomp.c: Use xor to save a test
X-Git-Tag: upstream/5.20.0~4331
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8b3b4f852b741d64a2eec9695dfe61fe2a05c531;p=platform%2Fupstream%2Fperl.git

regcomp.c: Use xor to save a test

(Perhaps the C optimizer already figures this out.)
---

diff --git a/regcomp.c b/regcomp.c
index 9008ae7..35fd196 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -11459,7 +11459,11 @@ parseit:
 		    if (UCHARAT(RExC_parse) == '^') {
 			 RExC_parse++;
 			 n--;
-			 value = value == 'p' ? 'P' : 'p'; /* toggle */
+                         /* toggle.  (The rhs xor gets the single bit that
+                          * differs between P and p; the other xor inverts just
+                          * that bit) */
+                         value ^= 'P' ^ 'p';
+
 			 while (isSPACE(UCHARAT(RExC_parse))) {
 			      RExC_parse++;
 			      n--;