Subzero: Improve non-MINIMAL string performance.

src/IceCfg.cpp

Index: src/IceCfg.cpp
diff --git a/src/IceCfg.cpp b/src/IceCfg.cpp
index e2bee72da7c930e092c1fa5509c6e7abb1344a9d..10c07ada5dfc4ebe82323df18101af0a4bbec9f1 100644
--- a/src/IceCfg.cpp
+++ b/src/IceCfg.cpp
@@ -1075,7 +1075,7 @@ void Cfg::emit() {
   if (getFlags().getDecorateAsm()) {
     for (Variable *Var : getVariables()) {
       if (Var->getStackOffset() && !Var->isRematerializable()) {
-        Str << "\t" << Var->getSymbolicStackOffset(this) << " = "
+        Str << "\t" << Var->getSymbolicStackOffset() << " = "
             << Var->getStackOffset() << "\n";
       }
     }