refactor: move overrides into a separate file

.buildkite/pipeline.yml

@@ -1,7 +1,7 @@
 steps:
   - group: ":test_tube: Tests"
     steps:
-      - label: "CUDA Julia v{{matrix.version}} -- {{matrix.group}}"
+      - label: ":julia: :linux: CUDA Julia v{{matrix.version}} -- {{matrix.group}}"
         matrix:
           setup:
             version:
@@ -33,7 +33,7 @@ steps:
         env:
           REACTANT_TEST_GROUP: "{{matrix.group}}"
         if: build.message !~ /\[skip tests\]/
-        timeout_in_minutes: 60
+        timeout_in_minutes: 120
 
       - label: ":julia: :linux: aarch64 - Julia v{{matrix.version}} -- {{matrix.group}}"
         matrix:
@@ -70,7 +70,7 @@ steps:
         env:
           REACTANT_TEST_GROUP: "{{matrix.group}}"
         if: build.message !~ /\[skip tests\]/
-        timeout_in_minutes: 60
+        timeout_in_minutes: 120
 
   - group: ":racehorse: Benchmarks"
     steps:

src/Compiler.jl

@@ -779,13 +779,6 @@ function compile(f, args; client=nothing, optimize=true, sync=false)
     return register_thunk(fname, body)
 end
 
-# Compiling within a compile should return simply the original function
-Reactant.@reactant_override function Reactant.Compiler.compile(
-    f, args; client=nothing, optimize=true, sync=false
-)
-    return f
-end
-
 # inspired by RuntimeGeneratedFunction.jl
 const __thunk_body_cache = Dict{Symbol,Expr}()
 

src/Interpreter.jl

@@ -23,7 +23,7 @@ import Core.Compiler:
 
 Base.Experimental.@MethodTable(REACTANT_METHOD_TABLE)
 
-function var"@reactant_override"(__source__::LineNumberNode, __module__::Module, def)
+function var"@reactant_overlay"(__source__::LineNumberNode, __module__::Module, def)
     return Base.Experimental.var"@overlay"(
         __source__, __module__, :(Reactant.REACTANT_METHOD_TABLE), def
     )
@@ -479,15 +479,3 @@ function overload_autodiff(
         end
     end
 end
-
-@reactant_override @noinline function Enzyme.autodiff_deferred(
-    rmode::Enzyme.Mode, f::FA, rt::Type{A}, args::Vararg{Annotation,Nargs}
-) where {FA<:Annotation,A<:Annotation,Nargs}
-    return overload_autodiff(rmode, f, rt, args...)
-end
-
-@reactant_override @noinline function Enzyme.autodiff(
-    rmode::Enzyme.Mode, f::FA, rt::Type{A}, args::Vararg{Annotation,Nargs}
-) where {FA<:Annotation,A<:Annotation,Nargs}
-    return overload_autodiff(rmode, f, rt, args...)
-end

src/Overlay.jl

@@ -0,0 +1,24 @@
+# NOTE: We are placing all the reactant_overrides here to avoid incompatibilities with
+#       Revise.jl. Essentially files that contain reactant_overrides cannot be revised
+#       correctly. Once that (https://github.com/timholy/Revise.jl/issues/646) is resolved
+#       we should move all the reactant_overrides to relevant files.
+
+# Compiling within a compile should return simply the original function
+@reactant_overlay function Compiler.compile(
+    f, args; client=nothing, optimize=true, sync=false
+)
+    return f
+end
+
+# Enzyme overrides
+@reactant_overlay @noinline function Enzyme.autodiff_deferred(
+    rmode::Enzyme.Mode, f::FA, rt::Type{A}, args::Vararg{Annotation,Nargs}
+) where {FA<:Annotation,A<:Annotation,Nargs}
+    return overload_autodiff(rmode, f, rt, args...)
+end
+
+@reactant_overlay @noinline function Enzyme.autodiff(
+    rmode::Enzyme.Mode, f::FA, rt::Type{A}, args::Vararg{Annotation,Nargs}
+) where {FA<:Annotation,A<:Annotation,Nargs}
+    return overload_autodiff(rmode, f, rt, args...)
+end

src/Reactant.jl

@@ -130,6 +130,8 @@ include("ControlFlow.jl")
 include("Tracing.jl")
 include("Compiler.jl")
 
+include("Overlay.jl")
+
 function Enzyme.make_zero(
     ::Type{RT}, seen::IdDict, prev::RT, ::Val{copy_if_inactive}=Val(false)
 )::RT where {copy_if_inactive,RT<:RArray}