Adjust to upcoming julia#54341 (#1511)

Corresponding IRTools changes are in FluxML/IRTools.jl#125.

src/compiler/interface2.jl

@@ -72,7 +72,13 @@ if VERSION >= v"1.10.0-DEV.873"
 
 function _pullback_generator(world::UInt, source, self, ctx, f, args)
   ret = _generate_pullback(ctx, world, f, args...)
-  ret isa Core.CodeInfo && return ret
+  if ret isa Core.CodeInfo
+    if isdefined(Base, :__has_internal_change) && Base.__has_internal_change(v"1.12-alpha", :codeinfonargs)
+      ret.nargs = 4
+      ret.isva = true
+    end
+    return ret
+  end
 
   stub = Core.GeneratedFunctionStub(identity, Core.svec(:methodinstance, :ctx, :f, :args), Core.svec())
   stub(world, source, ret)
@@ -85,7 +91,13 @@ end
 
 function _callable_pullback_generator(world::UInt, source, self, Δ)
   ret = _generate_callable_pullback(self, world, Δ)
-  ret isa Core.CodeInfo && return ret
+  if ret isa Core.CodeInfo
+    if isdefined(Base, :__has_internal_change) && Base.__has_internal_change(v"1.12-alpha", :codeinfonargs)
+      ret.nargs = 2
+      ret.isva = false
+    end
+    return ret
+  end
 
   stub = Core.GeneratedFunctionStub(identity, Core.svec(:methodinstance, :Δ), Core.svec())
   stub(world, source, ret)

src/lib/literal_getproperty.jl

@@ -85,6 +85,11 @@ function _generate_literal_getproperty(ctx, world, x, ::Type{Val{f}}) where f
         ci.edges = Core.MethodInstance[mi, mi_pb_getproperty, mi_getproperty, mi_rrule]
         # XXX: on 1.10, we should also set metadata like min-world and max-world
 
+        if isdefined(Base, :__has_internal_change) && Base.__has_internal_change(v"1.12-alpha", :codeinfonargs)
+            ci.nargs = 5
+            ci.isva = false
+        end
+
         return ci
     else
         # nothing to optimize here, need to recurse into `getproperty`