add support for EnterNode

the EnterNode struct was added in JuliaLang/julia#52300
This commit adds support for ingesting and exporting CodeInfo with EnterNode
but still uses `Expr(:enter)` inside IRTools IR. We may want to switch
the representation to `IRTools.EnterNode` similarly to `IRTools.Slot` if
more fields are added to the `Core.EnterNode` struct.

src/ir/print.jl

@@ -79,6 +79,9 @@ end
 
 function print_stmt(io::IO, ::Val{:enter}, ex)
   print(io, "try #$(ex.args[1])")
+  if length(ex.args) >= 2
+      print(io, " with scope ", ex.args[2])
+  end
 end
 
 function print_stmt(io::IO, ::Val{:leave}, ex)

src/ir/wrap.jl

@@ -12,6 +12,14 @@ import Core.Compiler: IRCode, CFG, GotoIfNot, ReturnNode, StmtRange
   import Core.Compiler: InstructionStream
 end
 
+@static if VERSION ≥ v"1.11.0-DEV.989"
+  isenter(ex) = ex isa Core.EnterNode
+  enter_catch_dest(ex) = ex.catch_dest
+else
+  isenter(ex) = isexpr(ex, :enter)
+  enter_catch_dest(ex) = ex.args[1]
+end
+
 unvars(ex) = prewalk(x -> x isa Variable ? SSAValue(x.id) : x, ex)
 
 function IRCode(ir::IR)
@@ -29,6 +37,9 @@ function IRCode(ir::IR)
     for (v, st) in b
       defs[v] = Variable(length(stmts)+1)
       ex = varmap(x -> get(defs, x, x), st.expr) |> unvars
+      @static if VERSION ≥ v"1.11.0-DEV.989"
+        ex = isexpr(ex, :enter) ? Core.EnterNode(ex.args...) : ex
+      end
       push!(stmts, ex)
       push!(types, st.type)
       push!(lines, st.line)
@@ -130,8 +141,10 @@ function IR(ci::CodeInfo, nargs::Integer; meta = nothing)
     ex = ci.code[i]
     if ex isa Core.NewvarNode
       continue
-    elseif isexpr(ex, :enter)
-      _rename[Core.SSAValue(i)] = push!(ir, Expr(:enter, findfirst(==(ex.args[1]), bs)+1))
+    elseif isenter(ex)
+      enter_expr = Expr(:enter, findfirst(==(enter_catch_dest(ex)), bs)+1)
+      isdefined(ex, :scope) && push!(enter_expr.args, ex.scope)
+      _rename[Core.SSAValue(i)] = push!(ir, enter_expr)
     elseif ex isa GotoNode
       branch!(ir, findfirst(==(ex.label), bs)+1)
     elseif isgotoifnot(ex)