Enable boolean store simplification of CFG Simplifier

The simplifyBooleanStore method of CFG Simplifier was disabled several
years ago.  This change reenables that transformation which had
previously been in use for many years.

Signed-off-by:  Henry Zongaro <[email protected]>

Author: hzongaro

compiler/optimizer/OMRCFGSimplifier.cpp

@@ -1093,8 +1093,8 @@ static bool checkEquivalentIndirectLoadChain(TR::Node *lhs, TR::Node *rhs)
 //
 bool OMR::CFGSimplifier::simplifyBooleanStore(bool needToDuplicateTree)
 {
-    static char *enableSimplifyBooleanStore = feGetEnv("TR_enableSimplifyBooleanStore");
-    if (enableSimplifyBooleanStore == NULL)
+    static const char *disableSimplifyBooleanStore = feGetEnv("TR_disableSimplifyBooleanStore");
+    if (disableSimplifyBooleanStore != NULL)
         return false;
 
     if (!(comp()->cg()->getSupportsSelect()))