optimize pp_subst a bit

Reini Urban · Reini Urban · commit e2be1bbe1a36 · 2016-05-08T20:25:28.000+02:00
diff --git a/pp_hot.c b/pp_hot.c
@@ -3228,7 +3228,7 @@ PP(pp_subst)
     }
 
     /* See "how taint works" above */
-    if (TAINTING_get) {
+    if (UNLIKELY(TAINTING_get)) {
 	if ((rxtainted & SUBST_TAINT_PAT) ||
 	    ((rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT)) ==
 				(SUBST_TAINT_STR|SUBST_TAINT_RETAINT))

Original file line number	Diff line number	Diff line change
`@@ -3228,7 +3228,7 @@ PP(pp_subst)`
`3228`	`3228`	`}`
`3229`	`3229`
`3230`	`3230`	`/* See "how taint works" above */`
`3231`		`- if (TAINTING_get) {`
	`3231`	`+ if (UNLIKELY(TAINTING_get)) {`
`3232`	`3232`	`if ((rxtainted & SUBST_TAINT_PAT) \|\|`
`3233`	`3233`	`((rxtainted & (SUBST_TAINT_STR\|SUBST_TAINT_RETAINT)) ==`
`3234`	`3234`	`(SUBST_TAINT_STR\|SUBST_TAINT_RETAINT))`