In 64 bit builds Lowering::DecompNodeHelper does nothing so walking the trees is pointless. Profiling indicates that this accounts for 0.5% of the mscorlib crossgen time.
}
#endif
comp->compCurStmt = stmt;
+#if !defined(_TARGET_64BIT_)
comp->fgWalkTreePost(&stmt->gtStmt.gtStmtExpr, &Lowering::DecompNodeHelper, this, true);
+#endif
comp->fgWalkTreePost(&stmt->gtStmt.gtStmtExpr, &Lowering::LowerNodeHelper, this, true);
// We may have removed "stmt" in LowerNode().
stmt = comp->compCurStmt;