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Function call return type infererence #41

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merged 12 commits into from
Oct 20, 2024

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@jackalcooper jackalcooper commented Oct 18, 2024

Summary by CodeRabbit

  • New Features

    • Introduced a comprehensive tutorial on using Charms, covering setup, functionality, and programming basics.
    • Added new utility functions in the SortUtil module for improved term copying.
    • Implemented new test cases to enhance coverage and error handling.
  • Documentation

    • Enhanced documentation for various modules and functions to improve clarity and usability.
  • Refactor

    • Streamlined function implementations for better clarity and functionality, particularly in the Charms.JIT and Charms.Defm.Definition modules.
    • Simplified control flow in sorting algorithms and utility functions.

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Walkthrough

The pull request includes modifications across several files, primarily focusing on enhancing the functionality and documentation of the Charms framework. Key changes involve updates to function signatures, the introduction of new modules and tutorials, and refinements in the handling of return types within the compilation process. Notably, the AddTwoIntVec module has been simplified by removing specific keywords and type specifications, while new instructional content has been added to guide users in utilizing Charms effectively.

Changes

File Change Summary
bench/vec_add_int_list.ex Updated AddTwoIntVec module; removed call keyword and type specification from add and dummy_load_no_make functions.
guides/programming-with-charms.livemd Introduced a tutorial on Charms, covering modules, macros, memory operations, control flow, and error handling. New modules added.
lib/charms/jit.ex Modified Charms.JIT module; updated clone_ops and init functions for clarity and functionality.
mix.exs Enhanced documentation configuration in Charms.MixProject module by adding keys for main and extras.
lib/charms/defm/definition.ex Updated documentation and refined implementation in Charms.Defm.Definition; significant changes in declare and compile functions.
bench/enif_merge_sort.ex Simplified do_sort and sort functions by replacing call with direct invocations.
bench/enif_tim_sort.ex Replaced while_loop constructs with while in insertion_sort and tim_sort; removed copy_terms function.
bench/sort_util.ex Introduced copy_terms/3 function for copying terms from a linked list to an array; streamlined loop syntax.
lib/charms/defm.ex Renamed while_loop macro to while, maintaining functionality.
lib/charms/defm/expander.ex Enhanced documentation and functionality; added new fields to struct and modified expand_with to expand_to_mlir.
test/defm_test.exs Added new tests for referenced modules and various call styles; refined error messages.
test/support/different_calls.ex Introduced DifferentCalls module with multiple functions demonstrating various call styles.
test/support/merge_mod.ex Simplified get_term function by removing unnecessary variable assignment.

Possibly related PRs

  • JIT module supervision #22: The changes in the lib/charms/defm.ex module involve modifications to the JIT engine retrieval method within the defm macro, which is relevant to the changes made in the AddTwoIntVec module in the main PR that also involves the defm macro.
  • Add tests for macro expansion in defm #24: This PR adds tests for macro expansion in defm, which is directly related to the changes in the AddTwoIntVec module that utilizes the defm macro for defining functions.
  • Replace Agent with LockedCache as to cache JIT compilation #25: The introduction of a caching mechanism in the JIT module may relate to the changes in the AddTwoIntVec module, as both involve JIT compilation aspects.
  • Serialize Elixir module attribute and read as native term #28: The changes in this PR regarding the serialization of Elixir module attributes may connect to the modifications in the AddTwoIntVec module, particularly in how functions are defined and utilized.
  • Init JIT in wrapper function #29: The changes to the initialization behavior of the JIT in this PR may relate to the modifications in the AddTwoIntVec module, which also involves function definitions that could be affected by JIT initialization.
  • Collect referenced modules and init them together #34: The changes in this PR regarding the collection of referenced modules may relate to the AddTwoIntVec module, as both involve the management of modules and their initialization.
  • More docs and add Charms.Intrinsic #36: The addition of Charms.Intrinsic and documentation improvements may relate to the changes in the AddTwoIntVec module, as both involve intrinsic functionalities and their definitions.
  • Disallow reference loop between modules #39: The disallowance of reference loops between modules may connect to the changes in the AddTwoIntVec module, as both involve module interactions and dependencies.

🐰 In the garden where code does bloom,
A rabbit hops, dispelling gloom.
With functions refined and docs anew,
Charms shines bright, in every hue.
Let's celebrate with joyful cheer,
For every change brings us near! 🌼


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@jackalcooper jackalcooper changed the title Cross module return type infer function call return type infererence Oct 18, 2024
@jackalcooper jackalcooper changed the title function call return type infererence Function call return type infererence Oct 18, 2024
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Actionable comments posted: 11

🧹 Outside diff range and nitpick comments (25)
test/support/different_calls.ex (1)

5-8: LGTM: Function implementation is correct.

The function with_return_type/2 is well-implemented, using the call macro and explicitly specifying the return type, which is consistent with its name.

Note: The env parameter is not used in the function body. If this is intentional (e.g., required by the Charms framework), you can ignore this observation. Otherwise, consider removing it if it's not needed.

bench/vec_add_int_list.ex (2)

43-44: LGTM! Consider adding a comment explaining the function's purpose.

The changes are consistent with those made in the add function, improving code readability. However, the function name and behavior (loading vectors but returning the unmodified a) might be confusing to future readers.

Consider adding a comment explaining the purpose of this function, especially if it's used for benchmarking or testing. For example:

  # This function is used for benchmarking the performance of vector loading
  # without the overhead of vector addition and list creation.
  defm dummy_load_no_make(env, a, b, error) :: Term.t() do
    v1 = load_list(env, a)
    v2 = load_list(env, b)
    func.return(a)
  end

24-25: Overall changes improve readability but may impact type safety.

The consistent removal of the call keyword and type specifications across functions suggests a shift towards relying more on type inference. While this improves code readability, it's crucial to ensure that the type inference system is robust enough to maintain type safety throughout the codebase.

Consider the following recommendations:

  1. Implement comprehensive type checking in your CI/CD pipeline to catch any type-related issues early.
  2. Document the decision to remove explicit type specifications and the reasoning behind it for future maintainers.
  3. Monitor the impact of these changes on compilation times and runtime performance, as increased reliance on type inference might affect these metrics.

Also applies to: 43-44

bench/enif_quick_sort.ex (1)

Line range hint 1-62: Summary of changes and potential impact.

The changes in this file are part of a larger refactoring effort to improve code organization:

  1. Removal of the Env alias
  2. Simplification of the partition function call
  3. Moving the copy_terms function to a separate SortUtil module

These changes generally improve code simplicity and organization. However, they require careful verification to ensure consistency across the codebase. Please make sure that:

  1. The removal of the Env alias doesn't affect any other parts of the code.
  2. The SortUtil.copy_terms function is implemented correctly and used consistently across all relevant modules.
  3. The changes don't introduce any regressions in functionality or performance.

Consider adding or updating tests to cover these changes and ensure the correctness of the refactored code.

mix.exs (1)

66-70: LGTM! Enhanced documentation configuration.

The changes to the docs function improve the documentation setup by specifying the main page and including additional documentation. The addition of the Livebook document ("programming-with-charms.livemd") is a great way to provide interactive documentation.

Consider adding a brief description for the Livebook document in the extras list. This can help users understand the content before accessing it. For example:

extras: [
  {"guides/programming-with-charms.livemd", [title: "Programming with Charms"]}
]

This change would provide more context in the generated documentation index.

test/expander_test.exs (1)

133-133: LGTM: Simplified test case for import behavior.

The modification improves the test by directly asserting the expected locals after invoking discard_import(foo()). This change focuses on the expected outcome and simplifies the test logic.

Consider adding a comment explaining the expected behavior:

# Before import, both discard_import/1 and foo/0 are treated as local calls
assert locals("discard_import(foo())") == [discard_import: 1, foo: 0]
guides/programming-with-charms.livemd (10)

1-6: Enhance the introduction with benefits of using Charms.

The introduction provides a good overview of what Charms is. Consider adding a brief explanation of the benefits of using Charms, such as potential performance improvements for computationally intensive tasks. This would help readers understand why they might want to use Charms in their projects.


7-18: Clarify what is imported when using Charms.

The section effectively demonstrates how to set up a module with Charms. To enhance clarity, consider specifying which modules or functions are commonly imported when using the use Charms directive. This information would help readers understand what's available to them out of the box.


19-37: Improve the example function to use both parameters.

The example effectively demonstrates the use of defm and type annotations. However, the my_fun function doesn't use its arg1 parameter, which might be confusing for readers. Consider modifying the function to use both parameters, perhaps by returning a tuple of both arguments or performing an operation that uses both. This would provide a more comprehensive example of function definition and usage in Charms.


38-63: Clarify the necessity of the call macro.

The section effectively demonstrates how to call functions defined with defm. However, the explanation of why the call macro is necessary for declaring return types could be clearer. Consider adding a brief explanation of how the call macro helps with type inference in the JIT compilation process, and why this is important for performance or correctness. This would help readers understand the significance of using call in their Charms code.


64-84: Provide more context for using pointers and memory operations.

The section effectively demonstrates basic pointer operations in Charms. Given the potential risks associated with these low-level operations, consider adding:

  1. A brief explanation of when and why developers might need to use these operations.
  2. Best practices or safety guidelines for working with pointers in Charms.
  3. Alternatives to using pointers directly, if any exist within the Charms ecosystem.

This additional information would help readers understand the trade-offs and use these features responsibly.


85-123: Provide more context for ENIF functions.

The section effectively introduces native types and demonstrates their use with ENIF functions. To enhance understanding, consider adding:

  1. A brief explanation of what ENIF (Erlang Native Implemented Functions) are and why they're useful in the context of Charms.
  2. A link to the Erlang documentation on ENIF functions for readers who want to learn more.
  3. A note on performance implications or other considerations when using ENIF functions in Charms.

This additional context would help readers, especially those new to Erlang/Elixir ecosystem, better understand the significance of these functions in native code.


124-196: Consider simplifying the while loop example.

The control flow section effectively demonstrates if statements and while loops in Charms. However, the while loop example, which involves list traversal and complex pointer manipulation, might be overwhelming for readers new to Charms or low-level programming.

Consider:

  1. Providing a simpler while loop example first, such as a basic counter or accumulator.
  2. Moving the current complex example to an "Advanced Examples" section later in the tutorial.
  3. Adding more comments within the complex example to explain each step of the pointer manipulation and list traversal.

This approach would make the content more accessible to beginners while still providing advanced examples for more experienced developers.


197-213: Provide more context for using constants in Charms.

The section effectively demonstrates how to define and use constants in Charms. To enhance understanding, consider adding:

  1. An explanation of why constants are useful in Charms code (e.g., performance benefits, code readability).
  2. Any limitations or considerations when using constants in Charms.
  3. Best practices for naming and using constants in Charms modules.

This additional information would help readers understand when and how to effectively use constants in their Charms code.


215-261: Clarify the difference in exception handling behavior.

The error handling section effectively demonstrates how to raise exceptions in Charms. To improve clarity:

  1. Expand on how enif_raise_exception behaves differently from Elixir's raise. Specifically, explain what "does not alter the control flow in the same way" means in practical terms.
  2. Provide an example or explanation of how to properly handle or catch exceptions raised by enif_raise_exception in Charms code.
  3. Discuss any performance implications or best practices for error handling in Charms compared to regular Elixir code.

This additional information would help readers understand the nuances of error handling in Charms and how it differs from what they might be used to in Elixir.


1-261: Overall improvements for the Charms tutorial.

The tutorial provides a comprehensive introduction to programming with Charms. To further enhance its effectiveness:

  1. Consider adding a table of contents at the beginning for easy navigation.
  2. Include a section on debugging Charms code and common pitfalls to watch out for.
  3. Add a section on performance considerations and when to use Charms vs. regular Elixir code.
  4. Provide more real-world examples or use cases where Charms would be particularly beneficial.
  5. Include links to additional resources or documentation for readers who want to dive deeper into specific topics.

These additions would make the tutorial more comprehensive and practical for developers looking to adopt Charms in their projects.

bench/sort_util.ex (2)

Line range hint 35-49: Consider Refactoring Duplicate Code in for_loop Constructs

The two for_loop blocks used to copy elements into left_temp and right_temp are structurally similar. Refactoring them into a single reusable function could improve code maintainability and reduce duplication.

Apply this diff to extract a reusable function:

+    defp copy_elements(src_arr, dest_arr, start_index, count) do
+      for_loop {element, idx} <- {Term.t(), Pointer.element_ptr(Term.t(), src_arr, start_index), count} do
+        idx = op index.casts(idx) :: i32()
+        idx = result_at(idx, 0)
+        Pointer.store(element, Pointer.element_ptr(Term.t(), dest_arr, idx))
+      end
+    end
+
     left_temp = Pointer.allocate(Term.t(), n1)
     right_temp = Pointer.allocate(Term.t(), n2)

-    for_loop {element, i} <- {Term.t(), Pointer.element_ptr(Term.t(), arr, l), n1} do
-      i = op index.casts(i) :: i32()
-      i = result_at(i, 0)
-      Pointer.store(element, Pointer.element_ptr(Term.t(), left_temp, i))
-    end
+    copy_elements(arr, left_temp, l, n1)

-    for_loop {element, j} <- {Term.t(), Pointer.element_ptr(Term.t(), arr, m + 1), n2} do
-      j = op index.casts(j) :: i32()
-      j = result_at(j, 0)
-      Pointer.store(element, Pointer.element_ptr(Term.t(), right_temp, j))
-    end
+    copy_elements(arr, right_temp, m + 1, n2)

Line range hint 81-101: Potential Memory Leak: Deallocate Temporary Arrays

After merging is complete, left_temp and right_temp are no longer needed. In environments where manual memory management is required, forgetting to deallocate these could lead to memory leaks. Ensure that any allocated memory is properly deallocated after use.

Apply this diff to deallocate the temporary arrays:

     func.return
+
+    # Deallocate temporary arrays
+    Pointer.deallocate(left_temp)
+    Pointer.deallocate(right_temp)
   end
lib/charms/jit.ex (2)

123-131: Use if instead of &if in tap for clarity

When using tap, wrapping the if statement in an anonymous function with & can be less readable. Consider refactoring by removing the & and writing the block directly, which can improve readability.

Apply this diff to refactor the tap usage:

     |> tap(
-      &if &1 do
+      fn modules ->
         for m when is_atom(m) <- modules,
             module != m do
           key = m.__ir_digest__()
           LockedCache.run(key, fn -> {:ok, %__MODULE__{jit | owner: false}} end)
         end
-      end
+      end
     )

Line range hint 137-137: Clarify tuple return value in init function

The then function returns a tuple {if(&1, do: :ok, else: :cached), jit}, which might be unclear to the caller. Consider defining an explicit status or result type to make it clearer whether a cached version was used or a new JIT compilation occurred.

Example refactored return:

|> then(fn
  nil -> {:cached, jit}
  _modules -> {:ok, jit}
end)
lib/charms/defm/expander.ex (5)

2-19: Enhance module documentation for clarity and correct grammatical errors

The module documentation contains several grammatical errors and typos that could hinder understanding. Here are suggested corrections to improve clarity:

  • Line 9: Change "To take deep dive" to "To take a deep dive".
  • Line 12: Replace "Cycle reference" with "Cyclic references".
  • Line 12: Change "stream line compile times features" to "streamline compile-time features".
  • Line 15:
    • "Being an dynamic language" should be "Being a dynamic language".
    • Replace "define a serial of nested function calls" with "define a series of nested function calls".
    • Add a comma after "In Elixir" in "In Elixir everything is expression" to read "In Elixir, everything is an expression".

Apply the following diff to update the documentation:

@@ -2,18 +2,18 @@
   @moduledoc """
     Expander is a module of functions to compile Elixir AST to MLIR.

-    In MLIR, the process of creating IR from source or AST is usually called "import". While in our case, we are following Elixir's convention to call it "expansion". While we are not just expanding Elixir's AST tree, in the end one Elixir function definition `defm` will be compiled to one MLIR `func.func`.
+    In MLIR, the process of creating IR from source or AST is usually called "import". In our case, we are following Elixir's convention to call it "expansion". While we are not just expanding Elixir's AST tree, in the end, one Elixir function definition `defm` will be compiled to one MLIR `func.func`.

     ## Working with Elixir's parallel compiler
-    Charms will try to work with Elixir's parallel compiler in the most well-integrated way. This allows us to compile multiple modules at the same time, which can speed up the compilation process. Another benefit is that all `defm` functions can also be executed at compile time, just like vanilla Elixir functions defined by `def`. Behind the scenes, `func.func` generated from `defm` will also be used as reference to infer and check types of a remote function calls when compiling another module.
+    Charms will work with Elixir's parallel compiler in an integrated way. This allows us to compile multiple modules simultaneously, speeding up the compilation process. Another benefit is that all `defm` functions can also be executed at compile time, just like vanilla Elixir functions defined by `def`. Behind the scenes, `func.func` generated from `defm` will also be used as a reference to infer and check types of remote function calls when compiling another module.

-    To take deep dive, Elixir has [an official blog post about parallel compiler](https://elixir-lang.org/blog/2012/04/24/a-peek-inside-elixir-s-parallel-compiler/).
+    For a deeper dive, Elixir has [an official blog post about the parallel compiler](https://elixir-lang.org/blog/2012/04/24/a-peek-inside-elixir-s-parallel-compiler/).

     ## Cycle reference
-    Charms will disallow cycle reference. If module A calls module B, then module B cannot call module A. This is to prevent infinite recursion and stream line compile times features. Although this is technically possible as long as function calls and function definitions are following same signature (like the separated complication of C/C++ files and linkage), we still make this trade-off for simplicity.
+    Charms will disallow cyclic references. If module A calls module B, then module B cannot call module A. This prevents infinite recursion and streamlines compile-time features. Although this is technically possible as long as function calls and function definitions follow the same signature (similar to the separate compilation of C/C++ files and linkage), we make this trade-off for simplicity.

     ## Compile an AST without enough type information
-    Being an dynamic language, it is possible for Elixir to have an AST that is valid in Elixir but not in MLIR. For example, Elixir allows to define a serial of nested function calls without any return type, like `a(b(c()))`. In Elixir everything is expression so a function call is assumed to always return a value while in MLIR it is possible to have a function call that does not return anything (equivalent to a void function in C). In this case, Charms will generate a `ub.poison` operation with result type `none`. If the result value of created `ub.poison` op will never be used, nothing will happen. If used, it will raise an error in later verification or passes. This is meant to allow Elixir code to work with the AST with interest only on Elixir semantic keep going without interruption as much as possible, and limit the error information to the type level, instead of leaking it to the syntax level.
+    Being a dynamic language, it is possible for Elixir to have an AST that is valid in Elixir but not in MLIR. For example, Elixir allows defining a series of nested function calls without any return type, like `a(b(c()))`. In Elixir, everything is an expression, so a function call is assumed to always return a value, while in MLIR, it is possible to have a function call that does not return anything (equivalent to a void function in C). In this case, Charms will generate a `ub.poison` operation with result type `none`. If the result value of the created `ub.poison` op is never used, nothing will happen. If used, it will raise an error in later verification or passes. This is meant to allow Elixir code to work with the AST with interest only on Elixir semantics, keeping the process going without interruption as much as possible, and limiting the error information to the type level instead of leaking it to the syntax level.

     ## Return type convention
     MLIR allows multiple values as a function return, while Elixir only allows one. To keep the convention, internally, Charms will always use a list to store a function's return type. If the function has only one return, it will be a list with one element. If the function has no return, it will be an empty list. This should streamline the transformation and pattern matching on the function signature.
   """

74-74: Correct duplicated phrase in the comment

There is a duplicate phrase in the comment:

  • Line 74: The phrase "the ability to" is repeated.

Apply this diff to correct the comment:

-# to programmatically report compiler errors and the ability to
+# to programmatically report compiler errors and

192-215: Assess the infer_by_resolving function for completeness

The infer_by_resolving function infers return types based on the state of the module and provided types. Verify that all possible cases are handled, and consider adding comments to explain complex logic branches for maintainability.


688-688: Enhance error message specificity

The error message in line 688 could be more specific to aid debugging:

raise ArgumentError, "Invalid operand: #{Macro.to_string(invalid_arg)}"

Consider including information about the expected operand type or context.


924-928: Improve validation of argument and return types

Lines 924-928 perform checks on argument and return types but may not provide detailed feedback on failures. Enhance the validation logic to include more informative error messages or consider using pattern matching for clearer code.

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📥 Commits

Files that changed from the base of the PR and between dff1740 and ed9a1eb.

📒 Files selected for processing (14)
  • bench/enif_merge_sort.ex (2 hunks)
  • bench/enif_quick_sort.ex (3 hunks)
  • bench/enif_tim_sort.ex (3 hunks)
  • bench/sort_util.ex (1 hunks)
  • bench/vec_add_int_list.ex (2 hunks)
  • guides/programming-with-charms.livemd (1 hunks)
  • lib/charms/defm/definition.ex (5 hunks)
  • lib/charms/defm/expander.ex (11 hunks)
  • lib/charms/jit.ex (2 hunks)
  • mix.exs (1 hunks)
  • test/defm_test.exs (4 hunks)
  • test/expander_test.exs (2 hunks)
  • test/support/different_calls.ex (1 hunks)
  • test/support/merge_mod.ex (1 hunks)
🧰 Additional context used
🔇 Additional comments (39)
test/support/merge_mod.ex (1)

25-25: Please clarify the call syntax and its purpose.

The change introduces a non-standard Elixir syntax i = call SubMod0.get_term(env, i). This appears to be related to the Charms module usage. Could you please provide more information on:

  1. The purpose and functionality of the call keyword in this context.
  2. How this syntax interacts with the Charms module.
  3. Any performance or behavior differences compared to a standard function call.

Additionally, I noticed that contrary to the AI summary, the type specification :: Term.t() is still present in the function signature. Could you confirm if removing this specification was intended, and if so, update the code accordingly?

To ensure consistency across the codebase, let's check for similar usage:

test/support/different_calls.ex (5)

1-4: LGTM: Module structure and imports are well-defined.

The module structure is correct, and the use of the Charms library along with the alias for Charms.Term is appropriate for the context of this module.


20-22: LGTM: Function implementation is correct.

The forward_call/1 function is well-implemented. It correctly uses the call macro to forward the call to defined_later/1, which is consistent with the module's pattern.


24-26: LGTM: Function implementation is correct and consistent.

The forward_call_with_type/1 function is well-implemented. It correctly uses the call macro to forward the call to defined_later/1 with an explicit return type of Term.t(), which is consistent with the function name and the module's pattern.


28-30: LGTM: Function implementation is correct and consistent.

The without_call_macro_forward_call/1 function is well-implemented. It correctly calls defined_later(i) directly without using the call macro, which is consistent with the function name and demonstrates the contrast with the other forward call functions in this module.


32-34: LGTM: Function implementation is correct.

The defined_later/1 function is well-implemented. It correctly uses func.return(i) to return its input, which is consistent with the module's pattern and its role as a target for forward calls in the previous functions.

bench/enif_merge_sort.ex (2)

28-28: Approve the change to SortUtil.copy_terms, but verify compatibility and performance

The change from call ENIFTimSort.copy_terms(env, movable_list_ptr, arr) to SortUtil.copy_terms(env, movable_list_ptr, arr) simplifies the code by removing the call keyword and consolidates utility functions into the SortUtil module. This change potentially improves code organization and maintainability.

To ensure this change doesn't introduce any issues or performance regressions, please:

  1. Verify that SortUtil.copy_terms provides the same functionality as the previous ENIFTimSort.copy_terms.
  2. Run performance tests to compare the execution time of the old and new implementations.

Run the following script to check the implementation of SortUtil.copy_terms:

#!/bin/bash
# Description: Verify the implementation of SortUtil.copy_terms

# Test: Search for the SortUtil.copy_terms function definition
ast-grep --lang elixir --pattern 'defm copy_terms($env, $movable_list_ptr, $arr) do
  $$$
end'

Additionally, please update the module documentation to reflect this change in the sorting implementation if necessary.


13-13: Approve the direct call to SortUtil.merge

The change from call SortUtil.merge(arr, l, m, r) to SortUtil.merge(arr, l, m, r) simplifies the code and potentially improves performance by removing the call keyword. This suggests a transition to a direct, synchronous function call.

To ensure this change doesn't introduce any issues, please verify that SortUtil.merge is designed to work correctly with direct calls. Run the following script to check the implementation of SortUtil.merge:

bench/vec_add_int_list.ex (1)

24-25: LGTM! Verify type inference for load_list calls.

The removal of the call keyword and type specifications simplifies the code and improves readability. However, ensure that the type inference system correctly infers the return type of load_list as SIMD.t(i32(), 8) to maintain type safety.

To verify the type inference, run the following script:

If the script doesn't return any results, consider adding type assertions to ensure type safety.

bench/enif_quick_sort.ex (2)

39-39: LGTM: Simplified function call.

The removal of the type annotation in the partition function call simplifies the code without affecting its functionality. The compiler should still be able to infer the types correctly.


4-4: Verify the removal of Env alias.

The Env alias has been removed from the list of aliases. Please ensure that this removal doesn't affect any other parts of the code that might have used Env.

Run the following script to verify that Env is not used elsewhere in the module:

✅ Verification successful

Removal of Env alias verified.

The Env alias is not used in bench/enif_quick_sort.ex, ensuring that its removal does not impact any other parts of the code.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for any remaining usage of `Env` in the module

# Test: Search for `Env.` usage in the file
rg --type elixir 'Env\.' bench/enif_quick_sort.ex

# Test: Search for standalone `Env` usage in the file
rg --type elixir '\bEnv\b' bench/enif_quick_sort.ex

Length of output: 1129

mix.exs (1)

Line range hint 1-85: Overall, these changes enhance the project's documentation.

The modifications to the docs function in the mix.exs file improve the documentation configuration without affecting other aspects of the project setup. This update will lead to better-organized and more accessible documentation for the Charms project, especially with the inclusion of the Livebook document.

bench/enif_tim_sort.ex (3)

4-4: LGTM! Verify removal of Env usage.

The removal of Env from the aliases is consistent with the changes in the module. This simplifies the module's dependencies.

To ensure Env is no longer used in the module, run the following script:

#!/bin/bash
# Description: Verify that Env is not used in the ENIFTimSort module

# Test: Search for any remaining usage of Env in the file
rg --type elixir '\bEnv\b' bench/enif_tim_sort.ex

85-85: LGTM! Verify SortUtil.copy_terms implementation.

Moving the copy_terms functionality to the SortUtil module is a good refactoring decision. It improves code organization and promotes reusability across different sorting algorithms.

To ensure the SortUtil.copy_terms function is correctly implemented, run the following script:

#!/bin/bash
# Description: Verify the SortUtil.copy_terms function implementation

# Test: Search for the SortUtil.copy_terms function definition
ast-grep --lang elixir --pattern 'defm copy_terms($env, $movable_list_ptr, $arr) do
  $$$
end'

66-66: LGTM! Verify SortUtil.merge function signature.

The simplification of the merge function call by removing the call keyword is a good change. It makes the code more straightforward and consistent with standard Elixir syntax.

To ensure the SortUtil.merge function signature matches this call, run the following script:

test/expander_test.exs (1)

2-4: LGTM: Clear and informative module documentation added.

The added module documentation provides a concise explanation of the test suite's purpose, emphasizing the preservation of Elixir semantics and conventions in Charms. This addition enhances the overall clarity and maintainability of the test module.

bench/sort_util.ex (3)

28-28: Simplification of n1 Calculation Improves Readability

The simplification of n1 from n1 = m - l + 1 - 1 + 1 to n1 = m - l + 1 correctly streamlines the expression and enhances code readability without affecting functionality.


Line range hint 87-89: Clarify the Purpose of func.return

The use of func.return at the end of the merge function suggests an intention to return control from the function. However, since no explicit value is being returned, it's unclear if this is necessary. Consider confirming whether func.return is required here or if it can be omitted for clarity.

You can verify the necessity of func.return with the following script:

#!/bin/bash
# Description: Check for functions in the codebase that use 'func.return' without returning a value.

# Expected result: Identify if 'func.return' is consistently used and required.

rg --type elixir 'defm.*do' -A 20 | rg 'func\.return'

21-23: Ensure Array arr Has Sufficient Capacity

When writing to ith_term_ptr, there is an implicit assumption that the array arr has enough capacity to hold all elements from the list. Ensure that arr is allocated with sufficient size to avoid buffer overflows or memory corruption.

You can verify the allocation size of arr with the following script:

✅ Verification successful

Allocation Verified: arr is properly sized based on the length of movable_list_ptr.

  • The len used for allocating arr is derived from the length of list, which is accurately stored in movable_list_ptr.
  • No issues related to insufficient capacity were found.
🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Verify that 'arr' is allocated with the correct size.

# Expected result: Confirm that 'arr' is allocated with a size equal to the length of 'movable_list_ptr'.

# Find where 'arr' is allocated and check its size allocation.
rg --type elixir 'Pointer\.allocate\(Term\.t\(\),\s*(\w+)\)' -A 2

Length of output: 2518


Script:

#!/bin/bash
# Description: Find the definition and usage of 'movable_list_ptr' and trace how 'len' is derived.

# Find where 'movable_list_ptr' is defined
rg --type elixir 'movable_list_ptr\s*='

# Find how 'len' is calculated based on 'movable_list_ptr'
rg --type elixir 'len\s*=\s*'

# Optionally, find all usages of 'len' to trace its source
rg --type elixir 'len\s*=' -A 5

Length of output: 2029


Script:

#!/bin/bash
# Description: Trace the definition and assignment of 'len_ptr' and how 'len' is derived from it.

# Find where 'len_ptr' is defined and assigned
rg --type elixir 'len_ptr\s*='

# Trace the origin of 'len_ptr'
rg --type elixir 'len_ptr\s*=' -A 5

# Find all usages of 'movable_list_ptr' to see if its length affects 'len'
rg --type elixir 'movable_list_ptr' -A 10

# Find where 'len' is used in relation to 'movable_list_ptr'
rg --type elixir 'len\s*=' -A 10 | grep 'movable_list_ptr'

Length of output: 4893

lib/charms/jit.ex (2)

35-35: Update to MLIR.Attribute.unwrap(sym) ensures correct attribute handling

The change from mlirStringAttrGetValue(sym) to MLIR.Attribute.unwrap(sym) improves the way the attribute sym is unwrapped before being used in mlirSymbolTableLookup. This ensures that the attribute is properly converted to the expected type for the lookup function.


121-132: Ensure modules is handled safely when nil

Since modules can be nil if the cache is hit, piping modules into tap and then could lead to unexpected behaviors if not handled properly. Ensure that the functions within the pipeline can safely handle a nil value without causing errors.

Run the following script to check where modules is used and confirm that all usages safely handle nil values:

✅ Verification successful

modules is safely handled when nil

All usages of modules within lib/charms/jit.ex appropriately handle the nil case. The pipeline includes checks to ensure that operations are only performed when modules is not nil, preventing unexpected behaviors.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Search for usages of `modules` in the codebase to verify nil safety.

# Test: Find all occurrences of `modules` and check for nil handling.
rg --type elixir -A 3 -B 3 '\bmodules\b' lib/charms/

Length of output: 2985

test/defm_test.exs (9)

4-6: Addition of test for referenced modules

The test "referenced modules" correctly verifies that ReferrerMod.referenced_modules() returns [RefereeMod], enhancing test coverage for module references.


9-20: Test for invalid return type handling

The "invalid return of absent alias" test appropriately checks that an ArgumentError is raised when an invalid return type Invalid.t() is used. This ensures robust error handling for undefined types.


Line range hint 21-31: Test for invalid argument type handling

The "invalid arg of absent alias" test correctly asserts that an ArgumentError is raised when using an invalid argument type Pointer.t() without the necessary alias. This verifies proper type checking for function arguments.


71-72: Verification of JIT initialization and caching

The assertions confirm that the first call to Charms.JIT.init/2 with AddTwoInt returns {:ok, %Charms.JIT{}}, and subsequent calls return {:cached, %Charms.JIT{}}. This effectively tests the JIT compilation and caching mechanism.


86-88: Ensuring JIT caching for ENIFQuickSort

The test verifies that re-initializing ENIFQuickSort returns {:cached, %Charms.JIT{}}, confirming that the JIT caching behaves as expected for the sorting module.


102-106: Introduction of test suite for different call scenarios

The new describe "different calls" block adds valuable tests. The "call with return type" test correctly checks that DifferentCalls.with_return_type/1 returns the expected value.


107-110: Test for function call without return type

The "call without return type" test appropriately validates the behavior of DifferentCalls.without_return_type/1, ensuring it returns the expected result without explicit return type annotation.


111-121: Test for undefined remote function handling

The test "undefined remote function" correctly asserts that an ArgumentError is raised when attempting to call an undefined function DifferentCalls.something/1. This ensures that proper errors are thrown for undefined remote function calls.


123-135: Test for incorrect return type in remote function call

The "wrong return type remote function" test effectively checks that an ArgumentError is raised when the expected return type does not match the actual return type of DifferentCalls.without_return_type/1. This helps enforce return type consistency.

lib/charms/defm/definition.ex (4)

142-144: Approved: Streamlined message extraction logic.

The updated code enhances clarity by chaining the unwrapping, conversion, and concatenation of the message and operation location.


169-169: Approved: Including location information in return operation.

Adding loc: MLIR.Operation.location(last_op) to Func.return improves debugging by preserving the context of operations.


Line range hint 217-244: Approved: Proper initialization of mlir_expander and extraction of return types.

The introduction of mlir_expander and deferred extraction of return types enhances the compilation process by allowing on-demand computation and better management of the expander state.


249-249: ⚠️ Potential issue

Potential misuse of the pipe operator with the def macro.

Piping the def macro into Charms.Defm.Expander.expand_to_mlir within a quoted expression may not work as intended. The def macro defines functions at compile time, and piping it into a function could lead to unexpected behavior.

Consider refactoring the code to ensure that function definitions are correctly expanded. For example, you might adjust the code as follows:

 quote do
   def(unquote(call) :: unquote(ret_types), unquote(body))
-  |> Charms.Defm.Expander.expand_to_mlir(env, mlir_expander)
 end
+|> Charms.Defm.Expander.expand_to_mlir(env, mlir_expander)

Or move the expansion outside the quote block:

 quote do
   def(unquote(call) :: unquote(ret_types), unquote(body))
 end
+|> Charms.Defm.Expander.expand_to_mlir(env, mlir_expander)

Ensure that the expansion of macros occurs at the correct phase in the compilation process.

Likely invalid or redundant comment.

lib/charms/defm/expander.ex (5)

34-36: Add new fields to struct for dependency and return type management

The addition of dependence_modules and return_types to the struct enhances the management of dependencies and return types during the expansion process. This change appears appropriate and integrates well with the existing structure.


135-145: Review implementation of fetch_dependence_module function

The fetch_dependence_module function caches and retrieves dependence modules. The implementation uses update_in with Map.put_new_lazy, which is efficient for lazy initialization of dependencies.


146-190: Validate logic in infer_by_lookup function

The infer_by_lookup function performs type inference by looking up symbols in the dependence module's symbol table. The logic handles various cases, including matching return types and raising appropriate errors for mismatches.

Ensure that:

  • The function correctly handles cases where the function is not found or is not a func.func.
  • The error messages provide clear and accurate information to aid in debugging.

228-259: Review control flow in expand_call_of_types

The expand_call_of_types function has a complex cond block handling various scenarios for function calls. Ensure that the logical conditions accurately represent all possible cases, and that fall-through cases are appropriately handled.

Consider adding unit tests to cover each condition branch to ensure robustness.


96-105: Ensure consistency with function renaming from expand_with to expand_to_mlir

The function expand_with has been replaced with expand_to_mlir. Please verify that all references and calls to expand_with throughout the codebase have been updated to expand_to_mlir to prevent any undefined function errors.

Run the following script to check for any remaining references to expand_with:

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jackalcooper and others added 3 commits October 20, 2024 15:12
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
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Actionable comments posted: 0

🧹 Outside diff range and nitpick comments (1)
lib/charms/defm/definition.ex (1)

209-211: Ensure consistent verb forms in bullet points.

In the documentation under "Notable preprocessing steps," the bullet points use different verb forms ("Extracting" and "Determine"). For consistency and improved readability, consider aligning the verb forms.

Apply this diff to make the verb forms consistent:

 - Extracting the return type of the `defm` definition, and wrapping it as an anonymous function to be called on-demand at the invocation site.
-- Determine the MLIR ops available in the definition.
+- Determining the MLIR ops available in the definition.
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  • lib/charms/defm/definition.ex (5 hunks)
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🔇 Additional comments (1)
lib/charms/defm/definition.ex (1)

94-94: ⚠️ Potential issue

Remove duplicate documentation line.

The documentation line "Declare a function that can be JIT compiled and generate Elixir invoker function." appears to be duplicated. Please remove the duplicate to enhance clarity.

Apply this diff to fix the duplication:

 def declare(env, call, body) do
-  Declare a function that can be JIT compiled and generate Elixir invoker function.
   
   The call signature will be decomposed and transformed into a normalized form.

Likely invalid or redundant comment.

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Actionable comments posted: 15

🧹 Outside diff range and nitpick comments (10)
test/support/merge_mod.ex (1)

Line range hint 1-38: Consider refactoring to reduce code duplication

While not directly related to the changes in this pull request, I noticed that SubMod0 and SubMod1 have identical implementations of get_attr and get_attr_dup. To improve maintainability and reduce code duplication, you might consider extracting these common functions into a shared module or using a macro.

For example, you could create a macro in a separate module:

defmodule CommonFunctions do
  defmacro __using__(_opts) do
    quote do
      @a __MODULE__
      defm get_attr(env) :: Term.t() do
        func.return(@a)
      end

      @b :some_attr
      defm get_attr_dup(env) :: Term.t() do
        func.return(@b)
      end
    end
  end
end

Then, in both SubMod0 and SubMod1, you could use:

defmodule SubMod0 do
  use Charms
  use CommonFunctions
  alias Charms.Term

  defm get_term(env, i) :: Term.t() do
    func.return(i)
  end
end

defmodule SubMod1 do
  use Charms
  use CommonFunctions
  alias Charms.Term

  defm get_term(env, i) :: Term.t() do
    SubMod0.get_term(env, i)
  end
end

This refactoring would make the code more DRY and easier to maintain in the future.

test/defm_test.exs (3)

9-9: LGTM: Improved error message and return type test.

The changes enhance the test's clarity and effectiveness:

  1. The error message is now more consistent and precise.
  2. Using Invalid.t() as the return type better tests the handling of invalid types.

Consider adding a comment explaining the purpose of using Invalid.t() to improve test readability.

Also applies to: 13-13


71-72: LGTM: Improved JIT initialization assertion.

The updated assertion now correctly handles both :ok and :cached results, making the test more robust and reflective of the actual behavior of Charms.JIT.init.

Consider extracting the %Charms.JIT{} pattern match into a separate variable to avoid repetition:

jit = %Charms.JIT{}
assert {:ok, ^jit} = Charms.JIT.init(AddTwoInt, name: :add_int)
assert {:cached, ^jit} = Charms.JIT.init(AddTwoInt, name: :add_int)

This would make the test slightly more concise and easier to maintain.


102-136: LGTM: Comprehensive test suite for different call scenarios.

This new test suite significantly enhances the coverage of function call scenarios, particularly focusing on return type handling. The tests cover:

  1. Calls with explicit return type annotations
  2. Calls without return type annotations
  3. Calls to undefined remote functions
  4. Calls with mismatched return types

These tests align well with the PR's objective of improving function call return type inference.

Consider adding a test case for a successful remote function call with a correct return type to ensure the happy path is also covered.

lib/charms/defm/definition.ex (1)

168-184: LGTM with suggestion: Enhanced return handling.

The updates to append_missing_return significantly improve its functionality by handling different return scenarios based on the number of function results. The use of MLIR operations for generating return statements is appropriate.

However, there's a minor suggestion for improvement:

In the case of multiple return values (line 184), consider providing more informative error message. For example:

-          raise ArgumentError, "Multiple return values are not supported yet."
+          raise ArgumentError, "Functions with multiple return values are not supported yet. Found #{num_results} results."

This change would provide more context about the unsupported case, including the actual number of return values encountered.

guides/programming-with-charms.livemd (4)

105-111: Add type annotation for i parameter

In add(env :: Env.t(), i), consider adding a type annotation for i for clarity.

-defm add(env :: Env.t(), i) :: Term.t() do
+defm add(env :: Env.t(), i :: Term.t()) :: Term.t() do

136-142: Add type annotations for parameters

The parameters a and b in if_example lack type annotations. Specify their types for consistency.

-defm if_example(env, a, b) :: Term.t() do
+defm if_example(env :: Env.t(), a :: Term.t(), b :: Term.t()) :: Term.t() do

206-209: Add type annotation for env parameter

In how_much, the env parameter is missing a type annotation. Add it for consistency.

-defm how_much(env) :: Term.t() do
+defm how_much(env :: Env.t()) :: Term.t() do

227-239: Add type annotations for parameters

In raise_it, both env and i lack type annotations. Specify them for clarity.

-defm raise_it(env, i :: Term.t()) :: Term.t() do
+defm raise_it(env :: Env.t(), i :: Term.t()) :: Term.t() do
lib/charms/defm/expander.ex (1)

927-928: Improve Error Message for Invalid Return Type

The current error message "invalid return type" lacks specific details. Consider providing more informative feedback to aid in debugging, such as including the invalid return type encountered.

Apply this diff to enhance the error message:

- raise ArgumentError, "invalid return type"
+ raise ArgumentError, "Invalid return type: #{inspect(ret_types)}"
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  • bench/enif_merge_sort.ex (2 hunks)
  • bench/enif_tim_sort.ex (5 hunks)
  • bench/sort_util.ex (4 hunks)
  • guides/programming-with-charms.livemd (1 hunks)
  • lib/charms/defm.ex (1 hunks)
  • lib/charms/defm/definition.ex (5 hunks)
  • lib/charms/defm/expander.ex (12 hunks)
  • lib/charms/jit.ex (2 hunks)
  • test/defm_test.exs (4 hunks)
  • test/support/different_calls.ex (1 hunks)
  • test/support/merge_mod.ex (1 hunks)
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🔇 Additional comments (36)
test/support/merge_mod.ex (1)

25-25: Improved code clarity in SubMod1.get_term/2

The simplification of the get_term function in SubMod1 is a good improvement. By directly returning the result of SubMod0.get_term(env, i), the code becomes more concise and easier to read. This change aligns well with the pull request's objective of streamlining function calls.

The modification maintains the expected behavior and doesn't introduce any new dependencies or potential issues. It's a clean and effective refactoring.

test/support/different_calls.ex (8)

5-7: LGTM: Well-implemented function using Charms conventions.

The return_type_annotation function is correctly implemented using the Charms library conventions. It properly uses the call macro and explicit return type annotations, which align with the function's purpose.


9-11: LGTM: Correctly implemented function without return type annotation in call.

The no_return_type_annotation function is well-implemented. It correctly omits the return type annotation in the call macro, which aligns with the function's name and purpose.


13-15: LGTM: Correctly implemented function without call macro.

The without_call_macro function is properly implemented. It demonstrates the correct usage of a direct function call without the call macro, which aligns with the function's name and purpose.


17-19: LGTM: Well-implemented forward call function.

The forward_call function is correctly implemented. It demonstrates the proper use of the call macro for a forward call to another function within the module, adhering to the Charms library conventions.


21-23: LGTM: Correctly implemented forward call with explicit return type.

The forward_call_with_type function is well-implemented. It properly demonstrates the use of the call macro with an explicit return type annotation for a forward call, which aligns with the function's name and purpose.


25-27: LGTM: Correctly implemented forward call without call macro.

The without_call_macro_forward_call function is properly implemented. It demonstrates the correct usage of a direct forward call without the call macro, which aligns with the function's name and purpose.


29-31: LGTM: Well-implemented target function for forward calls.

The defined_later function is correctly implemented. It serves as the target for the forward calls in previous functions and properly uses func.return to return the input value, adhering to the Charms library conventions.


1-32: Excellent implementation of various calling conventions using Charms.

This new DifferentCalls module is well-structured and effectively demonstrates various calling conventions and return type specifications using the Charms library. The module includes:

  1. Functions with and without the call macro
  2. Forward calls with and without explicit return type annotations
  3. Consistent use of return type annotations in function definitions

All functions are implemented correctly and serve as good examples of different calling conventions within the Charms framework. This module will be valuable for testing and demonstrating the capabilities of the updated Charms library.

bench/enif_merge_sort.ex (2)

13-13: LGTM: Simplified function call syntax

The removal of the call keyword from the SortUtil.merge function call simplifies the syntax while maintaining the same functionality. This change is consistent with similar modifications made in other modules, contributing to a more streamlined codebase.


26-26: LGTM: Simplified function call and centralized functionality

The change simplifies the function call syntax by removing the call keyword and updates the called function from ENIFTimSort.copy_terms to SortUtil.copy_terms. This is consistent with the centralization of the copy_terms functionality in the SortUtil module.

To ensure this change doesn't introduce any unintended side effects, please verify that the implementation of SortUtil.copy_terms is equivalent to the previous ENIFTimSort.copy_terms. You can use the following script to compare the implementations:

lib/charms/defm.ex (1)

45-45: Approve the rename from while_loop to while, with follow-up actions.

The change from while_loop to while is a good simplification that aligns with common programming conventions and the overall simplification efforts in the codebase. However, this change may have some implications:

  1. Update all documentation and examples that reference while_loop to use while instead.
  2. Verify that this change doesn't break existing code in the rest of the codebase or in projects using this library.
  3. Consider adding a deprecated while_loop macro that calls while and issues a warning, to ease migration for existing users.

To verify the impact of this change, run the following script:

This script will help identify any remaining instances of while_loop that need to be updated, as well as confirm that the new while macro is being used correctly.

✅ Verification successful

Rename from while_loop to while verified successfully.

No instances of while_loop were found in the source code or documentation, and the new Charms.Defm.while macro is properly defined. Ensure that future code uses the updated while macro.

🏁 Scripts executed

The following scripts were executed for the analysis:

Script:

#!/bin/bash
# Description: Check for any remaining uses of `while_loop` in the codebase and documentation

# Search for `while_loop` in source files
echo "Searching for 'while_loop' in source files:"
rg 'while_loop' --type-add 'source:*.{ex,exs}' -t source

# Search for `while_loop` in documentation files
echo "Searching for 'while_loop' in documentation files:"
rg 'while_loop' --type-add 'docs:*.{md,txt}' -t docs

# Search for `Charms.Defm.while` to ensure the new name is being used
echo "Searching for new 'Charms.Defm.while' usage:"
rg 'Charms\.Defm\.while' --type-add 'source:*.{ex,exs}' -t source

Length of output: 502


Script:

#!/bin/bash
# Description: Verify the definition and usage of the new `while` macro in the codebase

# Check if `while` macro is defined in `Charms.Defm` module
echo "Checking for macro definition of 'Charms.Defm.while':"
rg 'defmacro\s+while\(' lib/charms/defm.ex

# Search for any usages of `Charms.Defm.while` in source files
echo "Searching for usages of 'Charms.Defm.while' in source files:"
rg 'Charms\.Defm\.while' --type-add 'source:*.{ex,exs}' -t source

# Additionally, search for any aliases or imports that might affect macro usage
echo "Searching for imports or aliases related to 'Charms.Defm' in source files:"
rg 'alias\s+Charms\.Defm' --type-add 'source:*.{ex,exs}' -t source

Length of output: 732

bench/enif_tim_sort.ex (4)

Line range hint 17-30: Improved readability with while construct

The replacement of while_loop with while simplifies the syntax and enhances code readability without altering the functionality. This change aligns well with the PR's objective of simplifying function calls and syntax across the codebase.


Line range hint 43-72: Improved readability and modularity in tim_sort

The changes in this function enhance both readability and modularity:

  1. The replacement of while_loop with while constructs improves code clarity and maintains consistency with the insertion_sort function.
  2. The introduction of SortUtil.merge suggests a positive refactoring towards better modularity by leveraging utility functions for common operations.

These modifications align well with the PR's goals of simplifying syntax and improving overall code organization.


85-85: Improved code organization with SortUtil.copy_terms

The replacement of the local copy_terms function with SortUtil.copy_terms is a positive change that centralizes term copying logic in the SortUtil module. This refactoring enhances code organization, potentially reduces duplication, and maintains the overall functionality of the sort function.


Line range hint 1-91: Overall improvements in code organization and readability

The changes in this file demonstrate a consistent effort to improve code organization and readability:

  1. Replacement of while_loop constructs with while loops simplifies syntax across the module.
  2. Removal of the local copy_terms function and use of SortUtil.copy_terms centralizes utility functions, potentially reducing code duplication.
  3. These changes maintain the overall functionality while aligning with the PR objectives of simplifying function calls and improving code structure.

Great job on these refactoring efforts!

bench/sort_util.ex (3)

5-25: LGTM: New copy_terms/3 function implementation looks good.

The new copy_terms/3 function effectively copies terms from a linked list to an array using low-level pointer operations. The logic is clear and concise.


28-28: LGTM: Improved consistency and readability

The changes in the merge/4 function improve code consistency and readability:

  1. The simplification of n1 calculation (line 28) is correct and more concise.
  2. The replacement of while_loop with while (lines 55, 82, 95) aligns with the updated syntax in the Charms.Defm module.

These modifications enhance code maintainability without altering the core functionality of the merge algorithm.

Also applies to: 55-55, 82-82, 95-95


11-18: ⚠️ Potential issue

Consider adding error handling for enif_get_list_cell

The while loop condition doesn't handle potential negative return values from enif_get_list_cell, which could indicate an error. This might lead to unexpected behavior or an infinite loop.

Consider implementing error handling similar to the suggestion in the previous review:

+    result = enif_get_list_cell(
+      env,
+      Pointer.load(Term.t(), movable_list_ptr),
+      head,
+      movable_list_ptr
+    )
+    if result < 0 do
+      # Handle error appropriately, e.g., raise an exception or return an error
+      # Example:
+      # raise "Error retrieving list cell"
+    end
-    while(
-      enif_get_list_cell(
-        env,
-        Pointer.load(Term.t(), movable_list_ptr),
-        head,
-        movable_list_ptr
-      ) > 0
-    ) do
+    while(result > 0) do
      # ... existing loop body ...
+      result = enif_get_list_cell(
+        env,
+        Pointer.load(Term.t(), movable_list_ptr),
+        head,
+        movable_list_ptr
+      )
+      if result < 0 do
+        # Handle error appropriately
+        break
+      end
    end

This change will ensure that any errors from enif_get_list_cell are properly handled, improving the robustness of the function.

test/defm_test.exs (4)

4-6: LGTM: New test for referenced modules.

This test is a valuable addition as it verifies the correct identification of module dependencies, which is crucial for cross-module return type inference.


21-21: LGTM: Consistent error message.

The updated error message maintains consistency with other error messages in the test suite, improving overall readability and maintainability.


86-88: LGTM: Consistent JIT initialization assertion.

This change aligns with the earlier update in the "add two integers" test, allowing for a :cached result from Charms.JIT.init. The multi-line formatting enhances readability, especially for longer expressions.


Line range hint 1-136: Overall assessment: Significant improvements to test coverage and error handling.

The changes in this file substantially enhance the test suite for the Charms framework, particularly in areas related to function call return type inference. The new tests and updated assertions provide more comprehensive coverage of various scenarios, including edge cases and error conditions. These improvements will contribute to the overall robustness and reliability of the framework.

Some minor suggestions for further improvement have been made in the individual comments. Consider implementing these to further refine the test suite.

lib/charms/defm/definition.ex (6)

94-96: LGTM: Documentation improvement.

The added line provides valuable information about the function's behavior, explaining that the call signature will be decomposed and transformed. This change enhances the documentation and addresses a previous grammatical issue.


143-145: LGTM: Refined attribute extraction.

The update to use MLIR.Attribute.unwrap for extracting the "msg" attribute appears to be a valid improvement. It maintains the existing functionality while potentially enhancing efficiency in message processing.


220-225: LGTM: Comprehensive documentation improvement.

The updates to the compile function's documentation are excellent. They provide valuable information about partial and lazy compilation, including specific preprocessing steps. These changes directly address previous suggestions for improving grammar and clarity, resulting in more informative and well-structured documentation.


Line range hint 233-242: LGTM: Enhanced mlir_expander structure.

The addition of the return_types field to the mlir_expander struct aligns well with the preprocessing steps described in the updated documentation. This change appears to be a key part of implementing the return type extraction feature, which should improve the compilation process.


243-260: LGTM: Implementation of return type preprocessing.

This new code block effectively implements the return type extraction preprocessing step described in the updated documentation. The use of anonymous functions for wrapping the return types allows for lazy evaluation, which is a good approach for on-demand processing. The implementation aligns well with the described functionality and should improve the flexibility of the compilation process.


265-265: LGTM: Consistent update to expand_to_mlir call.

The addition of mlir_expander as an argument to the expand_to_mlir function call is consistent with the earlier updates to the mlir_expander struct. This change ensures that the expansion process has access to the preprocessed return types, maintaining the coherence of the implementation.

lib/charms/jit.ex (3)

35-35: Symbol lookup updated with unwrapped attribute

The change to use MLIR.Attribute.unwrap(sym) in mlirSymbolTableLookup ensures that the symbol attribute is correctly unwrapped for the lookup operation.


123-124: Implemented caching for JIT engines of referenced modules

Caching the JIT engines for referenced modules enhances performance by preventing redundant JIT compilations for modules that have already been processed.


129-132: Clear return values indicate cache status

Returning {:ok, jit} on a cache miss and {:cached, jit} on a cache hit provides explicit information about the cache state, allowing for appropriate handling in calling functions.

lib/charms/defm/expander.ex (4)

2-19: Excellent Addition of Module Documentation

The comprehensive module documentation enhances the clarity and understanding of the Charms.Defm.Expander module. It provides valuable insights into the module's purpose, functionality, and integration with Elixir's parallel compiler, which will benefit future maintainability.


34-36: Verify Initialization and Utilization of New Struct Fields

The new fields dependence_modules and return_types have been added to the struct. Please ensure these fields are properly initialized and consistently used throughout the module to prevent potential nil value errors or unexpected behavior.


Line range hint 1026-1060: Verify :while Macro Expansion Implementation

The implementation of the expand_macro function for the :while macro introduces loop logic. Ensure that the condition and body expansions correctly manage variable scopes and control flow to prevent unintended side effects or infinite loops.


99-107: ⚠️ Potential issue

Ensure All References to expand_with Are Updated

The method expand_with has been renamed to expand_to_mlir. Verify that all internal and external references to expand_with have been updated to expand_to_mlir to prevent any UndefinedFunctionError due to lingering outdated references.

Run the following script to check for any remaining references to expand_with:

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@jackalcooper jackalcooper merged commit bd2e676 into main Oct 20, 2024
1 check passed
@jackalcooper jackalcooper deleted the cross-module-return-type-infer branch October 20, 2024 08:19
This was referenced Nov 27, 2024
@coderabbitai coderabbitai bot mentioned this pull request Dec 5, 2024
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