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@@ -81,7 +81,6 @@ dist/ | |
| downloads/ | ||
| eggs/ | ||
| .eggs/ | ||
| lib/ | ||
| lib64/ | ||
| parts/ | ||
| sdist/ | ||
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| @@ -0,0 +1,21 @@ | ||
| MIT License | ||
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| Copyright (c) 2024 Enzyme Automatic Differentiation Compiler | ||
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| Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| of this software and associated documentation files (the "Software"), to deal | ||
| in the Software without restriction, including without limitation the rights | ||
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| copies of the Software, and to permit persons to whom the Software is | ||
| furnished to do so, subject to the following conditions: | ||
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| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
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| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| SOFTWARE. |
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| name = "ReactantCore" | ||
| uuid = "a3311ec8-5e00-46d5-b541-4f83e724a433" | ||
| authors = ["William Moses <wmoses@mit.edu>", "Valentin Churavy <vchuravy@mit.edu>", "Sergio Sánchez Ramírez <sergio.sanchez.ramirez@bsc.es>", "Paul Berg <paul@plutojl.org>"] | ||
| version = "0.1.0" | ||
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| [deps] | ||
| ExpressionExplorer = "21656369-7473-754a-2065-74616d696c43" | ||
| MacroTools = "1914dd2f-81c6-5fcd-8719-6d5c9610ff09" | ||
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| [compat] | ||
| ExpressionExplorer = "1" | ||
| MacroTools = "0.5.13" | ||
| julia = "1.10" |
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| module ReactantCore | ||
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| using ExpressionExplorer: ExpressionExplorer | ||
| using MacroTools: MacroTools | ||
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| export @trace, MissingTracedValue | ||
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| # Traits | ||
| is_traced(x) = false | ||
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| # New Type signifying that a value is missing | ||
| mutable struct MissingTracedValue | ||
| paths::Tuple | ||
| end | ||
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| MissingTracedValue() = MissingTracedValue(()) | ||
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| # Code generation | ||
| macro trace(expr) | ||
| expr.head == :if && return esc(trace_if(__module__, expr)) | ||
| return error("Only `if-elseif-else` blocks are currently supported by `@trace`") | ||
| end | ||
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| function trace_if(mod, expr) | ||
| expr.head == :if && error_if_return(expr) | ||
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| condition_vars = [ExpressionExplorer.compute_symbols_state(expr.args[1]).references...] | ||
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| true_branch_symbols = ExpressionExplorer.compute_symbols_state(expr.args[2]) | ||
| true_branch_input_list = [true_branch_symbols.references...] | ||
| true_branch_assignments = [true_branch_symbols.assignments...] | ||
| all_true_branch_vars = true_branch_input_list ∪ true_branch_assignments | ||
| true_branch_fn_name = gensym(:true_branch) | ||
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| else_block, discard_vars = if length(expr.args) == 3 | ||
| if expr.args[3].head != :elseif | ||
| expr.args[3], nothing | ||
| else | ||
| trace_if(mod, expr.args[3]) | ||
| end | ||
| elseif length(expr.args) == 2 | ||
| tmp_expr = [] | ||
| for var in true_branch_assignments | ||
| push!(tmp_expr, :($(var) = $(var))) | ||
| end | ||
| Expr(:block, tmp_expr...), nothing | ||
| else | ||
| dump(expr) | ||
| error("This shouldn't happen") | ||
| end | ||
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| false_branch_symbols = ExpressionExplorer.compute_symbols_state(else_block) | ||
| false_branch_input_list = [false_branch_symbols.references...] | ||
| false_branch_assignments = [false_branch_symbols.assignments...] | ||
| all_false_branch_vars = false_branch_input_list ∪ false_branch_assignments | ||
| false_branch_fn_name = gensym(:false_branch) | ||
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| all_input_vars = true_branch_input_list ∪ false_branch_input_list | ||
| all_output_vars = true_branch_assignments ∪ false_branch_assignments | ||
| discard_vars !== nothing && setdiff!(all_output_vars, discard_vars) | ||
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| all_vars = all_input_vars ∪ all_output_vars | ||
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| non_existant_true_branch_vars = setdiff(all_output_vars, all_true_branch_vars) | ||
| true_branch_extras = Expr( | ||
| :block, | ||
| [:($(var) = $(MissingTracedValue())) for var in non_existant_true_branch_vars]..., | ||
| ) | ||
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| true_branch_fn = quote | ||
| $(true_branch_fn_name) = | ||
| ($(all_input_vars...),) -> begin | ||
| $(expr.args[2]) | ||
| $(true_branch_extras) | ||
| return ($(all_output_vars...),) | ||
| end | ||
| end | ||
| true_branch_fn = cleanup_expr_to_avoid_boxing( | ||
| true_branch_fn, true_branch_fn_name, all_vars | ||
| ) | ||
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| non_existant_false_branch_vars = setdiff(all_output_vars, all_false_branch_vars) | ||
| false_branch_extras = Expr( | ||
| :block, | ||
| [:($(var) = $(MissingTracedValue())) for var in non_existant_false_branch_vars]..., | ||
| ) | ||
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| false_branch_fn = quote | ||
| $(false_branch_fn_name) = | ||
| ($(all_input_vars...),) -> begin | ||
| $(else_block) | ||
| $(false_branch_extras) | ||
| return ($(all_output_vars...),) | ||
| end | ||
| end | ||
| false_branch_fn = cleanup_expr_to_avoid_boxing( | ||
| false_branch_fn, false_branch_fn_name, all_vars | ||
| ) | ||
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| reactant_code_block = quote | ||
| $(true_branch_fn) | ||
| $(false_branch_fn) | ||
| ($(all_output_vars...),) = $(traced_if)( | ||
| $(expr.args[1]), | ||
| $(true_branch_fn_name), | ||
| $(false_branch_fn_name), | ||
| ($(all_input_vars...),), | ||
| ) | ||
| end | ||
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| expr.head != :if && | ||
| return reactant_code_block, (true_branch_fn_name, false_branch_fn_name) | ||
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| all_check_vars = [all_input_vars..., condition_vars...] | ||
| return quote | ||
| if any($(is_traced), ($(all_check_vars...),)) | ||
| $(reactant_code_block) | ||
| else | ||
| $(expr) | ||
| end | ||
| end | ||
| end | ||
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| # Generate this dummy function and later we remove it during tracing | ||
| function traced_if(cond, true_fn::TFn, false_fn::FFn, args) where {TFn,FFn} | ||
| return cond ? true_fn(args) : false_fn(args) | ||
| end | ||
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| function cleanup_expr_to_avoid_boxing(expr, prepend::Symbol, all_vars) | ||
| return MacroTools.postwalk(expr) do x | ||
| if x isa Symbol && x ∈ all_vars | ||
| return Symbol(prepend, x) | ||
| end | ||
| return x | ||
| end | ||
| end | ||
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| function error_if_return(expr) | ||
| return MacroTools.postwalk(expr) do x | ||
| if x isa Expr && x.head == :return | ||
| error("Cannot use @trace on a block that contains a return statement") | ||
| end | ||
| return x | ||
| end | ||
| end | ||
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| end |
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