diff --git a/base/compiler/inferencestate.jl b/base/compiler/inferencestate.jl
index 583ca82727b74..1ed52d0beefa7 100644
--- a/base/compiler/inferencestate.jl
+++ b/base/compiler/inferencestate.jl
@@ -12,8 +12,6 @@ mutable struct InferenceState
 
     # info on the state of inference and the linfo
     src::CodeInfo
-    min_valid::UInt
-    max_valid::UInt
     nargs::Int
     stmt_types::Vector{Any}
     stmt_edges::Vector{Any}
@@ -129,17 +127,17 @@ mutable struct InferenceState
             inmodule = linfo.def::Module
         end
 
+        # TODO: we should be setting this correctly somewhere else
         if cached && !toplevel
-            min_valid = min_world(linfo.def)
-            max_valid = max_world(linfo.def)
+            set_min_world!(src, min_world(linfo.def))
+            set_max_world!(src, max_world(linfo.def))
         else
-            min_valid = typemax(UInt)
-            max_valid = typemin(UInt)
+            set_min_world!(src, typemax(UInt))
+            set_max_world!(src, typemin(UInt))
         end
         frame = new(
             params, result, linfo,
-            sp, inmodule, 0,
-            src, min_valid, max_valid,
+            sp, inmodule, 0, src,
             nargs, s_types, s_edges,
             Union{}, W, 1, n,
             cur_hand, handler_at, n_handlers,
@@ -170,16 +168,16 @@ _topmod(sv::InferenceState) = _topmod(sv.mod)
 
 # work towards converging the valid age range for sv
 function update_valid_age!(min_valid::UInt, max_valid::UInt, sv::InferenceState)
-    sv.min_valid = max(sv.min_valid, min_valid)
-    sv.max_valid = min(sv.max_valid, max_valid)
+    set_min_world!(sv.src, max(min_world(sv.src), min_valid))
+    set_max_world!(sv.src, min(max_world(sv.src), max_valid))
     @assert(!isa(sv.linfo.def, Method) ||
             !sv.cached ||
-            sv.min_valid <= sv.params.world <= sv.max_valid,
+            min_world(sv.src) <= sv.params.world <= max_world(sv.src),
             "invalid age range update")
     nothing
 end
 
-update_valid_age!(edge::InferenceState, sv::InferenceState) = update_valid_age!(edge.min_valid, edge.max_valid, sv)
+update_valid_age!(edge::InferenceState, sv::InferenceState) = update_valid_age!(min_world(edge.src), max_world(edge.src), sv)
 update_valid_age!(li::MethodInstance, sv::InferenceState) = update_valid_age!(min_world(li), max_world(li), sv)
 
 function record_ssa_assign(ssa_id::Int, @nospecialize(new), frame::InferenceState)
diff --git a/base/compiler/optimize.jl b/base/compiler/optimize.jl
index 5943037cf33c5..b548176f9cd02 100644
--- a/base/compiler/optimize.jl
+++ b/base/compiler/optimize.jl
@@ -12,8 +12,6 @@ mutable struct OptimizationState
     mod::Module
     nargs::Int
     next_label::Int # index of the current highest label for this function
-    min_valid::UInt
-    max_valid::UInt
     params::Params
     function OptimizationState(frame::InferenceState)
         s_edges = frame.stmt_edges[1]
@@ -26,8 +24,7 @@ mutable struct OptimizationState
         return new(frame.linfo, frame.result.vargs,
                    s_edges::Vector{Any},
                    src, frame.mod, frame.nargs,
-                   next_label, frame.min_valid, frame.max_valid,
-                   frame.params)
+                   next_label, frame.params)
     end
     function OptimizationState(linfo::MethodInstance, src::CodeInfo,
                                params::Params)
@@ -57,9 +54,7 @@ mutable struct OptimizationState
         return new(linfo, result_vargs,
                    s_edges::Vector{Any},
                    src, inmodule, nargs,
-                   next_label,
-                   min_world(linfo), max_world(linfo),
-                   params)
+                   next_label, params)
     end
 end
 
@@ -82,11 +77,11 @@ function newvar!(sv::OptimizationState, @nospecialize(typ))
 end
 
 function update_valid_age!(min_valid::UInt, max_valid::UInt, sv::OptimizationState)
-    sv.min_valid = max(sv.min_valid, min_valid)
-    sv.max_valid = min(sv.max_valid, max_valid)
+    set_min_world!(sv.src, max(min_world(sv.src), min_valid))
+    set_max_world!(sv.src, min(max_world(sv.src), max_valid))
     @assert(!isa(sv.linfo.def, Method) ||
-            (sv.min_valid == typemax(UInt) && sv.max_valid == typemin(UInt)) ||
-            sv.min_valid <= sv.params.world <= sv.max_valid,
+            (min_world(sv.src) == typemax(UInt) && max_world(sv.src) == typemin(UInt)) ||
+            min_world(sv.src) <= sv.params.world <= max_world(sv.src),
             "invalid age range update")
     nothing
 end
@@ -323,8 +318,8 @@ function optimize(me::InferenceState)
                 reindex_labels!(opt)
             end
         end
-        me.min_valid = opt.min_valid
-        me.max_valid = opt.max_valid
+        set_min_world!(me.src, min_world(opt.src))
+        set_max_world!(me.src, max_world(opt.src))
     end
 
     # convert all type information into the form consumed by the code-generator
@@ -412,8 +407,8 @@ function finish(me::InferenceState)
     if me.cached
         toplevel = !isa(me.linfo.def, Method)
         if !toplevel
-            min_valid = me.min_valid
-            max_valid = me.max_valid
+            min_valid = min_world(me.src)
+            max_valid = max_world(me.src)
         else
             min_valid = UInt(0)
             max_valid = UInt(0)
diff --git a/base/compiler/typeinfer.jl b/base/compiler/typeinfer.jl
index 534106c79f2b2..698a740b210bd 100644
--- a/base/compiler/typeinfer.jl
+++ b/base/compiler/typeinfer.jl
@@ -5,7 +5,7 @@ const COMPILER_TEMP_SYM = Symbol("#temp#")
 # add the real backedges
 function finalize_backedges(frame::InferenceState)
     toplevel = !isa(frame.linfo.def, Method)
-    if !toplevel && (frame.cached || frame.parent !== nothing) && frame.max_valid == typemax(UInt)
+    if !toplevel && (frame.cached || frame.parent !== nothing) && max_world(frame.src) == typemax(UInt)
         caller = frame.linfo
         for edges in frame.stmt_edges
             i = 1
@@ -173,6 +173,8 @@ function typeinf_code(linfo::MethodInstance, optimize::Bool, cached::Bool,
                     tree.slotflags = fill(0x00, Int(method.nargs))
                     tree.slottypes = nothing
                     tree.ssavaluetypes = 0
+                    set_min_world!(tree, min_world(linfo))
+                    set_max_world!(tree, max_world(linfo))
                     tree.inferred = true
                     tree.ssaflags = UInt8[]
                     tree.pure = true
@@ -423,11 +425,11 @@ function typeinf(frame::InferenceState)
                 typeinf_work(caller)
                 no_active_ips_in_callers = false
             end
-            if caller.min_valid < frame.min_valid
-                caller.min_valid = frame.min_valid
+            if min_world(caller.src) < min_world(frame.src)
+                set_min_world!(caller.src, min_world(frame.src))
             end
-            if caller.max_valid > frame.max_valid
-                caller.max_valid = frame.max_valid
+            if max_world(caller.src) > max_world(frame.src)
+                set_max_world!(caller.src, max_world(frame.src))
             end
         end
     end
@@ -448,16 +450,16 @@ function typeinf(frame::InferenceState)
         # complete the computation of the src optimizations
         for caller in frame.callers_in_cycle
             optimize(caller)
-            if frame.min_valid < caller.min_valid
-                frame.min_valid = caller.min_valid
+            if min_world(frame.src) < min_world(caller.src)
+                set_min_world!(frame.src, min_world(caller.src))
             end
-            if frame.max_valid > caller.max_valid
-                frame.max_valid = caller.max_valid
+            if max_world(frame.src) > max_world(caller.src)
+                set_max_world!(frame.src, max_world(caller.src))
             end
         end
         # update and store in the global cache
         for caller in frame.callers_in_cycle
-            caller.min_valid = frame.min_valid
+            set_min_world!(caller.src, min_world(frame.src))
         end
         for caller in frame.callers_in_cycle
             finish(caller)
diff --git a/base/compiler/utilities.jl b/base/compiler/utilities.jl
index 34aadcc7a9d7f..92bb4fe49e7b7 100644
--- a/base/compiler/utilities.jl
+++ b/base/compiler/utilities.jl
@@ -92,9 +92,19 @@ function occurs_more(@nospecialize(e), pred, n)
     return 0
 end
 
-###########################
-# MethodInstance/CodeInfo #
-###########################
+##################################
+# Method/MethodInstance/CodeInfo #
+##################################
+
+min_world(m::Method) = reinterpret(UInt, m.min_world)
+max_world(m::Method) = typemax(UInt)
+min_world(m::MethodInstance) = reinterpret(UInt, m.min_world)
+max_world(m::MethodInstance) = reinterpret(UInt, m.max_world)
+min_world(c::CodeInfo) = reinterpret(UInt, c.min_world)
+max_world(c::CodeInfo) = reinterpret(UInt, c.max_world)
+
+set_min_world!(c::CodeInfo, w::UInt) = (sw = reinterpret(Int, w); c.min_world = sw; sw)
+set_max_world!(c::CodeInfo, w::UInt) = (sw = reinterpret(Int, w); c.max_world = sw; sw)
 
 function invoke_api(li::MethodInstance)
     return ccall(:jl_invoke_api, Cint, (Any,), li)
diff --git a/base/errorshow.jl b/base/errorshow.jl
index cdaaa940f1ed8..68fcda1a13a4e 100644
--- a/base/errorshow.jl
+++ b/base/errorshow.jl
@@ -443,7 +443,7 @@ function show_method_candidates(io::IO, ex::MethodError, @nospecialize kwargs=()
                         end
                     end
                 end
-                if ex.world < min_world(method)
+                if ex.world < Core.Compiler.min_world(method)
                     print(iob, " (method too new to be called from this world context.)")
                 end
                 # TODO: indicate if it's in the wrong world
diff --git a/base/reflection.jl b/base/reflection.jl
index 504528f56b6d3..846a5e25ccbd8 100644
--- a/base/reflection.jl
+++ b/base/reflection.jl
@@ -1058,11 +1058,6 @@ has_bottom_parameter(t::Union) = has_bottom_parameter(t.a) & has_bottom_paramete
 has_bottom_parameter(t::TypeVar) = t.ub == Bottom || has_bottom_parameter(t.ub)
 has_bottom_parameter(::Any) = false
 
-min_world(m::Method) = reinterpret(UInt, m.min_world)
-max_world(m::Method) = typemax(UInt)
-min_world(m::Core.MethodInstance) = reinterpret(UInt, m.min_world)
-max_world(m::Core.MethodInstance) = reinterpret(UInt, m.max_world)
-
 """
     propertynames(x, private=false)
 
diff --git a/src/dump.c b/src/dump.c
index 54135fc445cac..de7c9dc6d2d11 100644
--- a/src/dump.c
+++ b/src/dump.c
@@ -2287,6 +2287,9 @@ JL_DLLEXPORT jl_array_t *jl_compress_ast(jl_method_t *m, jl_code_info_t *code)
                   | (code->pure << 0);
     write_uint8(s.s, flags);
 
+    write_int32(s.s, code->min_world);
+    write_int32(s.s, code->max_world);
+
     size_t nsyms = jl_array_len(code->slotnames);
     assert(nsyms >= m->nargs && nsyms < INT32_MAX); // required by generated functions
     write_int32(s.s, nsyms);
@@ -2299,7 +2302,7 @@ JL_DLLEXPORT jl_array_t *jl_compress_ast(jl_method_t *m, jl_code_info_t *code)
     }
 
     size_t nf = jl_datatype_nfields(jl_code_info_type);
-    for (i = 0; i < nf - 5; i++) {
+    for (i = 0; i < nf - 7; i++) {
         int copy = (i != 2); // don't copy contents of method_for_inference_limit_heuristics field
         jl_serialize_value_(&s, jl_get_nth_field((jl_value_t*)code, i), copy);
     }
@@ -2350,6 +2353,9 @@ JL_DLLEXPORT jl_code_info_t *jl_uncompress_ast(jl_method_t *m, jl_array_t *data)
     code->propagate_inbounds = !!(flags & (1 << 1));
     code->pure = !!(flags & (1 << 0));
 
+    code->min_world = read_int32(s.s);
+    code->max_world = read_int32(s.s);
+
     size_t nslots = read_int32(&src);
     jl_array_t *syms = jl_alloc_vec_any(nslots);
     code->slotnames = syms;
@@ -2362,7 +2368,7 @@ JL_DLLEXPORT jl_code_info_t *jl_uncompress_ast(jl_method_t *m, jl_array_t *data)
     }
 
     size_t nf = jl_datatype_nfields(jl_code_info_type);
-    for (i = 0; i < nf - 5; i++) {
+    for (i = 0; i < nf - 7; i++) {
         assert(jl_field_isptr(jl_code_info_type, i));
         jl_value_t **fld = (jl_value_t**)((char*)jl_data_ptr(code) + jl_field_offset(jl_code_info_type, i));
         *fld = jl_deserialize_value(&s, fld);
diff --git a/src/jltypes.c b/src/jltypes.c
index 94a113fb09df2..afa8469cbd356 100644
--- a/src/jltypes.c
+++ b/src/jltypes.c
@@ -2023,7 +2023,7 @@ void jl_init_types(void)
     jl_code_info_type =
         jl_new_datatype(jl_symbol("CodeInfo"), core,
                         jl_any_type, jl_emptysvec,
-                        jl_perm_symsvec(13,
+                        jl_perm_symsvec(15,
                             "code",
                             "codelocs",
                             "method_for_inference_limit_heuristics",
@@ -2033,11 +2033,13 @@ void jl_init_types(void)
                             "ssaflags",
                             "slotflags",
                             "slotnames",
+                            "min_world",
+                            "max_world",
                             "inferred",
                             "inlineable",
                             "propagate_inbounds",
                             "pure"),
-                        jl_svec(13,
+                        jl_svec(15,
                             jl_array_any_type,
                             jl_any_type,
                             jl_any_type,
@@ -2050,11 +2052,13 @@ void jl_init_types(void)
                             // If you change them, you'll have to adjust the
                             // serializer
                             jl_array_any_type,
+                            jl_long_type,
+                            jl_long_type,
                             jl_bool_type,
                             jl_bool_type,
                             jl_bool_type,
                             jl_bool_type),
-                        0, 1, 13);
+                        0, 1, 15);
 
     jl_method_type =
         jl_new_datatype(jl_symbol("Method"), core,
diff --git a/src/julia.h b/src/julia.h
index 6c8b26bd37e68..bf81b81f0443e 100644
--- a/src/julia.h
+++ b/src/julia.h
@@ -247,6 +247,8 @@ typedef struct _jl_code_info_t {
         // 7 = has out-of-band info
     jl_array_t *slotflags;  // local var bit flags
     jl_array_t *slotnames; // names of local variables
+    size_t min_world;
+    size_t max_world;
     uint8_t inferred;
     uint8_t inlineable;
     uint8_t propagate_inbounds;
diff --git a/src/method.c b/src/method.c
index 044dea93da60c..dd906f746f9da 100644
--- a/src/method.c
+++ b/src/method.c
@@ -312,6 +312,8 @@ JL_DLLEXPORT jl_code_info_t *jl_new_code_info_uninit(void)
     src->codelocs = jl_nothing;
     src->linetable = jl_nothing;
     src->ssaflags = NULL;
+    src->min_world = 0;
+    src->max_world = 0;
     src->inferred = 0;
     src->pure = 0;
     src->inlineable = 0;
@@ -520,6 +522,8 @@ static void jl_method_set_source(jl_method_t *m, jl_code_info_t *src)
         jl_array_ptr_set(copy, i, st);
     }
     src = jl_copy_code_info(src);
+    src->min_world = m->min_world;
+    src->max_world = ~(size_t)0;
     src->code = copy;
     jl_gc_wb(src, copy);
     if (gen_only)
diff --git a/test/compiler/compiler.jl b/test/compiler/compiler.jl
index 086d6ba2cebc0..037793b4f5ca8 100644
--- a/test/compiler/compiler.jl
+++ b/test/compiler/compiler.jl
@@ -1303,8 +1303,8 @@ let linfo = get_linfo(Base.convert, Tuple{Type{Int64}, Int32}),
     @test opt.src.ssavaluetypes isa Vector{Any}
     @test !opt.src.inferred
     @test opt.mod === Base
-    @test opt.max_valid === typemax(UInt)
-    @test opt.min_valid === Core.Compiler.min_world(opt.linfo) > 2
+    @test Core.Compiler.max_world(opt.src) === typemax(UInt)
+    @test Core.Compiler.min_world(opt.src) === Core.Compiler.min_world(opt.linfo) > 2
     @test opt.nargs == 3
 end