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Revamp interpreter #1443

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Revamp interpreter #1443

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6cff68a
WIP
michel2323 May 13, 2024
2f0677b
Merge branch 'main' into vs/interp
wsmoses Sep 15, 2024
832f106
Merge branch 'main' into vs/interp
wsmoses Sep 16, 2024
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51 changes: 50 additions & 1 deletion src/compiler/interpreter.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -212,4 +212,53 @@ let # overload `inlining_policy`
end
end

end # module Interpreter
import Core.Compiler: abstract_call, abstract_call_known, ArgInfo, StmtInfo, AbsIntState, get_max_methods,
CallMeta, Effects, NoCallInfo, widenconst, mapany

struct AutodiffCallInfo <: CallInfo
# ...
info::CallInfo
end


unwrap_annotation(A::Type{<:Enzyme.Annotation}) = eltype(A)
unwrap_annotation(A::Core.Const) = Core.Const((A.val::Enzyme.Annotation).val)

function abstract_autodiff(interp::AbstractInterpreter, @nospecialize(f),
arginfo::ArgInfo, si::StmtInfo, sv::AbsIntState, max_methods::Int)
(; fargs, argtypes) = arginfo
# Requires Mode to be Const
if length(argtypes) < 4 || !(widenconst(argtypes[3]) <: Enzyme.Annotation) # [autodiff, mode, FA, A, ...]
return Base.@invoke abstract_call_known(
interp::AbstractInterpreter, f, arginfo::ArgInfo,
si::StmtInfo, sv::AbsIntState, max_methods::Int)
end

primal_argvec = mapany(unwrap_annotation, Any[argtypes[3], argtypes[5:end]...])
primal_call = abstract_call(interp, ArgInfo(nothing, primal_argvec), si, sv, max_methods)
primal_info = primal_call.info
primal_rt = primal_call.rt
# TODO: Calculate proper return type of autodiff
autodiff_rt = Any
# autodiff_rt = primal_rt
@show primal_call
@static if VERSION < v"1.11.0-"
return CallMeta(autodiff_rt, Effects(), AutodiffCallInfo(primal_info))
else
return CallMeta(Nothing, autodiff_rt, Effects(), AutodiffCallInfo(primal_info))
end
end

function abstract_call_known(interp::EnzymeInterpreter, @nospecialize(f),
arginfo::ArgInfo, si::StmtInfo, sv::AbsIntState,
max_methods::Int = get_max_methods(interp, f, sv))

if f === Enzyme.autodiff || f === Enzyme.autodiff_deferred
return abstract_autodiff(interp, f, arginfo, si, sv, max_methods)
end
return Base.@invoke abstract_call_known(
interp::AbstractInterpreter, f, arginfo::ArgInfo,
si::StmtInfo, sv::AbsIntState, max_methods::Int)
end

end
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