compat: support Base.Experimental.@force_compile (#56)

`:meta :force_compile` is one of the forms known by the compiler.

Also adds `:doc` to the list.

Co-authored-by: Em Chu <[email protected]>

---------

Co-authored-by: Em Chu <[email protected]>

Author: aviatesk

src/compat.jl

@@ -420,15 +420,15 @@ function _insert_convert_expr(@nospecialize(e), graph::SyntaxGraph, src::SourceA
         elseif e.args[1] in (:inline, :noinline, :generated, :generated_only,
                              :max_methods, :optlevel, :toplevel, :push_loc, :pop_loc,
                              :aggressive_constprop, :specialize, :compile, :infer,
-                             :nospecializeinfer)
+                             :nospecializeinfer, :force_compile, :doc)
             # TODO: Some need to be handled in lowering
             child_exprs[1] = Expr(:quoted_symbol, e.args[1])
         else
             # Can't throw a hard error; it is explicitly tested that meta can take arbitrary keys.
             @error("Unknown meta form at $src: `$e`\n$(sprint(dump, e))")
             child_exprs[1] = Expr(:quoted_symbol, e.args[1])
         end
-    elseif e.head === :scope_layer 
+    elseif e.head === :scope_layer
         @assert nargs === 2
         @assert e.args[1] isa Symbol
         @assert e.args[2] isa LayerId