forward_visit!: Don't break on stmt-level Expr(:boundscheck)

The default transform should be fine.

Author: Keno

src/codegen/forward_demand.jl

@@ -187,6 +187,8 @@ function forward_visit!(ir::IRCode, ssa::SSAValue, order::Int, ssa_orders::Vecto
         return
     elseif isexpr(stmt, :loopinfo) #TODO preserve this properly
         return
+    elseif isexpr(stmt, :boundscheck)
+        return
     elseif !isa(stmt, Expr)
         return
     else