add some fixes from Enzyme

Author: vchuravy

test/helpers/enzyme.jl

@@ -81,16 +81,18 @@ function deferred_codegen_id_generator(world::UInt, source, self, ft::Type, tt::
     # prepare a new code info
     new_ci = copy(ci)
     empty!(new_ci.code)
-if VERSION >= v"1.12.0-DEV.173"
-else
-    empty!(new_ci.codelocs)
-    empty!(new_ci.linetable)
-end
+    @static if isdefined(Core, :DebugInfo)
+      new_ci.debuginfo = Core.DebugInfo(:none)
+    else
+      empty!(new_ci.codelocs)
+      resize!(new_ci.linetable, 1)                # see note below
+    end
     empty!(new_ci.ssaflags)
     new_ci.ssavaluetypes = 0
 
     # propagate edge metadata
-    new_ci.min_world = min_world[]
+    # new_ci.min_world = min_world[]
+    new_ci.min_world = world
     new_ci.max_world = max_world[]
     new_ci.edges = Core.MethodInstance[mi]
 
@@ -110,14 +112,17 @@ end
     # return the deferred_codegen_id
     push!(new_ci.code, CC.ReturnNode(id))
     push!(new_ci.ssaflags, 0x00)
-if VERSION >= v"1.12.0-DEV.173"
-    new_ci.debuginfo = Core.DebugInfo(:none)
-else
-    push!(new_ci.linetable, GPUCompiler.@LineInfoNode(mi))
-    push!(new_ci.codelocs, 1)
-end
+        @static if isdefined(Core, :DebugInfo)
+    else
+      push!(new_ci.codelocs, 1)   # see note below
+    end
     new_ci.ssavaluetypes += 1
 
+    # NOTE: we keep the first entry of the original linetable, and use it for location info
+    #       on the call to check_cache. we can't not have a codeloc (using 0 causes
+    #       corruption of the back trace), and reusing the target function's info
+    #       has as advantage that we see the name of the kernel in the backtraces.
+
     return new_ci
 end