scirs2_core/array_protocol/
jit_impl.rs

1// Copyright (c) 2025, `SciRS2` Team
2//
3// Licensed under the Apache License, Version 2.0
4// (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
5//
6
7//! Just-In-Time (JIT) compilation support for array operations.
8//!
9//! This module provides functionality for JIT-compiling operations on arrays,
10//! allowing for faster execution of custom operations.
11
12use std::any::{Any, TypeId};
13use std::collections::HashMap;
14use std::fmt::Debug;
15use std::marker::PhantomData;
16use std::sync::{Arc, LazyLock, RwLock};
17
18use crate::array_protocol::{
19    ArrayFunction, ArrayProtocol, JITArray, JITFunction, JITFunctionFactory,
20};
21use crate::error::{CoreError, CoreResult, ErrorContext};
22
23/// JIT compilation backends
24#[derive(Debug, Clone, Copy, PartialEq, Eq)]
25pub enum JITBackend {
26    /// LLVM backend
27    LLVM,
28
29    /// Cranelift backend
30    Cranelift,
31
32    /// WebAssembly backend
33    WASM,
34
35    /// Custom backend
36    Custom(TypeId),
37}
38
39impl Default for JITBackend {
40    fn default() -> Self {
41        Self::LLVM
42    }
43}
44
45/// Configuration for JIT compilation
46#[derive(Debug, Clone)]
47pub struct JITConfig {
48    /// The JIT backend to use
49    pub backend: JITBackend,
50
51    /// Whether to optimize the generated code
52    pub optimize: bool,
53
54    /// Optimization level (0-3)
55    pub opt_level: usize,
56
57    /// Whether to cache compiled functions
58    pub use_cache: bool,
59
60    /// Additional backend-specific options
61    pub backend_options: HashMap<String, String>,
62}
63
64impl Default for JITConfig {
65    fn default() -> Self {
66        Self {
67            backend: JITBackend::default(),
68            optimize: true,
69            opt_level: 2,
70            use_cache: true,
71            backend_options: HashMap::new(),
72        }
73    }
74}
75
76/// Type alias for the complex function type
77pub type JITFunctionType = dyn Fn(&[Box<dyn Any>]) -> CoreResult<Box<dyn Any>> + Send + Sync;
78
79/// A compiled JIT function
80pub struct JITFunctionImpl {
81    /// The source code of the function
82    source: String,
83
84    /// The compiled function
85    function: Box<JITFunctionType>,
86
87    /// Information about the compilation
88    compile_info: HashMap<String, String>,
89}
90
91impl Debug for JITFunctionImpl {
92    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
93        f.debug_struct("JITFunctionImpl")
94            .field("source", &self.source)
95            .field("compile_info", &self.compile_info)
96            .finish_non_exhaustive()
97    }
98}
99
100impl JITFunctionImpl {
101    /// Create a new JIT function.
102    #[must_use]
103    pub fn new(
104        source: String,
105        function: Box<JITFunctionType>,
106        compile_info: HashMap<String, String>,
107    ) -> Self {
108        Self {
109            source,
110            function,
111            compile_info,
112        }
113    }
114}
115
116impl JITFunction for JITFunctionImpl {
117    fn evaluate(&self, args: &[Box<dyn Any>]) -> CoreResult<Box<dyn Any>> {
118        (self.function)(args)
119    }
120
121    fn source(&self) -> String {
122        self.source.clone()
123    }
124
125    fn compile_info(&self) -> HashMap<String, String> {
126        self.compile_info.clone()
127    }
128
129    fn clone_box(&self) -> Box<dyn JITFunction> {
130        // Create a new JITFunctionImpl with a fresh function that behaves the same way
131        let source = self.source.clone();
132        let compile_info = self.compile_info.clone();
133
134        // Create a dummy function that returns a constant value
135        // In a real implementation, this would properly clone the behavior
136        let cloned_function: Box<JITFunctionType> = Box::new(move |_args| {
137            // Return a dummy result (42.0) as an example
138            Ok(Box::new(42.0))
139        });
140
141        Box::new(Self {
142            source,
143            function: cloned_function,
144            compile_info,
145        })
146    }
147}
148
149/// A factory for creating JIT functions using the LLVM backend
150pub struct LLVMFunctionFactory {
151    /// Configuration for JIT compilation
152    config: JITConfig,
153
154    /// Cache of compiled functions
155    cache: HashMap<String, Arc<dyn JITFunction>>,
156}
157
158impl LLVMFunctionFactory {
159    /// Create a new LLVM function factory.
160    pub fn new(config: JITConfig) -> Self {
161        Self {
162            config,
163            cache: HashMap::new(),
164        }
165    }
166
167    /// Compile a function using LLVM.
168    fn compile(&self, expression: &str, array_typeid: TypeId) -> CoreResult<Arc<dyn JITFunction>> {
169        // In a real implementation, this would use LLVM to compile the function
170        // For now, we'll just create a placeholder function
171
172        // Create some compile info
173        let mut compile_info = HashMap::new();
174        compile_info.insert("backend".to_string(), "LLVM".to_string());
175        compile_info.insert("opt_level".to_string(), self.config.opt_level.to_string());
176        compile_info.insert("array_type".to_string(), format!("{array_typeid:?}"));
177
178        // Create a function that just returns a constant value
179        // In a real implementation, this would be a compiled function
180        let source = expression.to_string();
181        let function: Box<JITFunctionType> = Box::new(move |_args| {
182            // Mock function just returns a constant value
183            Ok(Box::new(42.0))
184        });
185
186        // Create the JIT function
187        let jit_function = JITFunctionImpl::new(source, function, compile_info);
188
189        Ok(Arc::new(jit_function))
190    }
191}
192
193impl JITFunctionFactory for LLVMFunctionFactory {
194    fn create_jit_function(
195        &self,
196        expression: &str,
197        array_typeid: TypeId,
198    ) -> CoreResult<Box<dyn JITFunction>> {
199        // Check if the function is already in the cache
200        if self.config.use_cache {
201            let cache_key = format!("{expression}-{array_typeid:?}");
202            if let Some(cached_fn) = self.cache.get(&cache_key) {
203                return Ok(cached_fn.as_ref().clone_box());
204            }
205        }
206
207        // Compile the function
208        let jit_function = self.compile(expression, array_typeid)?;
209
210        if self.config.use_cache {
211            // Add the function to the cache
212            let cache_key = format!("{expression}-{array_typeid:?}");
213            // In a real implementation, we'd need to handle this in a thread-safe way
214            // For now, we'll just clone the function
215            let mut cache = self.cache.clone();
216            cache.insert(cache_key, jit_function.clone());
217        }
218
219        // Clone the function and return it
220        Ok(jit_function.as_ref().clone_box())
221    }
222
223    fn supports_array_type(&self, _array_typeid: TypeId) -> bool {
224        // For simplicity, we'll say this factory supports all array types
225        true
226    }
227}
228
229/// A factory for creating JIT functions using the Cranelift backend
230pub struct CraneliftFunctionFactory {
231    /// Configuration for JIT compilation
232    config: JITConfig,
233
234    /// Cache of compiled functions
235    cache: HashMap<String, Arc<dyn JITFunction>>,
236}
237
238impl CraneliftFunctionFactory {
239    /// Create a new Cranelift function factory.
240    pub fn new(config: JITConfig) -> Self {
241        Self {
242            config,
243            cache: HashMap::new(),
244        }
245    }
246
247    /// Compile a function using Cranelift.
248    fn compile(&self, expression: &str, array_typeid: TypeId) -> CoreResult<Arc<dyn JITFunction>> {
249        // In a real implementation, this would use Cranelift to compile the function
250        // For now, we'll just create a placeholder function
251
252        // Create some compile info
253        let mut compile_info = HashMap::new();
254        compile_info.insert("backend".to_string(), "Cranelift".to_string());
255        compile_info.insert("opt_level".to_string(), self.config.opt_level.to_string());
256        compile_info.insert("array_type".to_string(), format!("{array_typeid:?}"));
257
258        // Create a function that just returns a constant value
259        // In a real implementation, this would be a compiled function
260        let source = expression.to_string();
261        let function: Box<JITFunctionType> = Box::new(move |_args| {
262            // Mock function just returns a constant value
263            Ok(Box::new(42.0))
264        });
265
266        // Create the JIT function
267        let jit_function = JITFunctionImpl::new(source, function, compile_info);
268
269        Ok(Arc::new(jit_function))
270    }
271}
272
273impl JITFunctionFactory for CraneliftFunctionFactory {
274    fn create_jit_function(
275        &self,
276        expression: &str,
277        array_typeid: TypeId,
278    ) -> CoreResult<Box<dyn JITFunction>> {
279        // Check if the function is already in the cache
280        if self.config.use_cache {
281            let cache_key = format!("{expression}-{array_typeid:?}");
282            if let Some(cached_fn) = self.cache.get(&cache_key) {
283                return Ok(cached_fn.as_ref().clone_box());
284            }
285        }
286
287        // Compile the function
288        let jit_function = self.compile(expression, array_typeid)?;
289
290        if self.config.use_cache {
291            // Add the function to the cache
292            let cache_key = format!("{expression}-{array_typeid:?}");
293            // In a real implementation, we'd need to handle this in a thread-safe way
294            // For now, we'll just clone the function
295            let mut cache = self.cache.clone();
296            cache.insert(cache_key, jit_function.clone());
297        }
298
299        // Clone the function and return it
300        Ok(jit_function.as_ref().clone_box())
301    }
302
303    fn supports_array_type(&self, _array_typeid: TypeId) -> bool {
304        // For simplicity, we'll say this factory supports all array types
305        true
306    }
307}
308
309/// A JIT manager that selects the appropriate factory for a given array type
310pub struct JITManager {
311    /// The available JIT function factories
312    factories: Vec<Box<dyn JITFunctionFactory>>,
313
314    /// Default configuration for JIT compilation
315    defaultconfig: JITConfig,
316}
317
318impl JITManager {
319    /// Create a new JIT manager.
320    pub fn new(defaultconfig: JITConfig) -> Self {
321        Self {
322            factories: Vec::new(),
323            defaultconfig,
324        }
325    }
326
327    /// Register a JIT function factory.
328    pub fn register_factory(&mut self, factory: Box<dyn JITFunctionFactory>) {
329        self.factories.push(factory);
330    }
331
332    /// Get a JIT function factory that supports the given array type.
333    pub fn get_factory_for_array_type(
334        &self,
335        array_typeid: TypeId,
336    ) -> Option<&dyn JITFunctionFactory> {
337        for factory in &self.factories {
338            if factory.supports_array_type(array_typeid) {
339                return Some(&**factory);
340            }
341        }
342        None
343    }
344
345    /// Compile a JIT function for the given expression and array type.
346    pub fn compile(
347        &self,
348        expression: &str,
349        array_typeid: TypeId,
350    ) -> CoreResult<Box<dyn JITFunction>> {
351        // Find a factory that supports the array type
352        if let Some(factory) = self.get_factory_for_array_type(array_typeid) {
353            factory.create_jit_function(expression, array_typeid)
354        } else {
355            Err(CoreError::JITError(ErrorContext::new(format!(
356                "No JIT factory supports array type: {array_typeid:?}"
357            ))))
358        }
359    }
360
361    /// Initialize the JIT manager with default factories.
362    pub fn initialize(&mut self) {
363        // Create and register the default factories
364        let llvm_config = JITConfig {
365            backend: JITBackend::LLVM,
366            ..self.defaultconfig.clone()
367        };
368        let llvm_factory = Box::new(LLVMFunctionFactory::new(llvm_config));
369
370        let cranelift_config = JITConfig {
371            backend: JITBackend::Cranelift,
372            ..self.defaultconfig.clone()
373        };
374        let cranelift_factory = Box::new(CraneliftFunctionFactory::new(cranelift_config));
375
376        self.register_factory(llvm_factory);
377        self.register_factory(cranelift_factory);
378    }
379
380    /// Get the global JIT manager instance.
381    #[must_use]
382    pub fn global() -> &'static RwLock<Self> {
383        static INSTANCE: LazyLock<RwLock<JITManager>> = LazyLock::new(|| {
384            RwLock::new(JITManager {
385                factories: Vec::new(),
386                defaultconfig: JITConfig {
387                    backend: JITBackend::LLVM,
388                    optimize: true,
389                    opt_level: 2,
390                    use_cache: true,
391                    backend_options: HashMap::new(),
392                },
393            })
394        });
395        &INSTANCE
396    }
397}
398
399/// An array that supports JIT compilation
400pub struct JITEnabledArray<T, A> {
401    /// The underlying array
402    inner: A,
403
404    /// Phantom data for the element type
405    phantom: PhantomData<T>,
406}
407
408impl<T, A> JITEnabledArray<T, A> {
409    /// Create a new JIT-enabled array.
410    pub fn new(inner: A) -> Self {
411        Self {
412            inner,
413            phantom: PhantomData,
414        }
415    }
416
417    /// Get a reference to the inner array.
418    pub const fn inner(&self) -> &A {
419        &self.inner
420    }
421}
422
423impl<T, A: Clone> Clone for JITEnabledArray<T, A> {
424    fn clone(&self) -> Self {
425        Self {
426            inner: self.inner.clone(),
427            phantom: PhantomData::<T>,
428        }
429    }
430}
431
432impl<T, A> JITArray for JITEnabledArray<T, A>
433where
434    T: Send + Sync + 'static,
435    A: ArrayProtocol + Clone + Send + Sync + 'static,
436{
437    fn compile(&self, expression: &str) -> CoreResult<Box<dyn JITFunction>> {
438        // Get the JIT manager
439        let jit_manager = JITManager::global();
440        let jit_manager = jit_manager.read().expect("Operation failed");
441
442        // Compile the function
443        (*jit_manager).compile(expression, TypeId::of::<A>())
444    }
445
446    fn supports_jit(&self) -> bool {
447        // Check if there's a factory that supports this array type
448        let jit_manager = JITManager::global();
449        let jit_manager = jit_manager.read().expect("Operation failed");
450
451        jit_manager
452            .get_factory_for_array_type(TypeId::of::<A>())
453            .is_some()
454    }
455
456    fn jit_info(&self) -> HashMap<String, String> {
457        let mut info = HashMap::new();
458
459        // Check if JIT is supported
460        let supported = self.supports_jit();
461        info.insert("supports_jit".to_string(), supported.to_string());
462
463        if supported {
464            // Get the JIT manager
465            let jit_manager = JITManager::global();
466            let jit_manager = jit_manager.read().expect("Operation failed");
467
468            // Get the factory
469            if jit_manager
470                .get_factory_for_array_type(TypeId::of::<A>())
471                .is_some()
472            {
473                // Get the factory's info
474                info.insert("factory".to_string(), "JIT factory available".to_string());
475            }
476        }
477
478        info
479    }
480}
481
482impl<T, A> ArrayProtocol for JITEnabledArray<T, A>
483where
484    T: Send + Sync + 'static,
485    A: ArrayProtocol + Clone + Send + Sync + 'static,
486{
487    fn array_function(
488        &self,
489        func: &ArrayFunction,
490        types: &[TypeId],
491        args: &[Box<dyn Any>],
492        kwargs: &HashMap<String, Box<dyn Any>>,
493    ) -> Result<Box<dyn Any>, crate::array_protocol::NotImplemented> {
494        // For now, just delegate to the inner array
495        self.inner.array_function(func, types, args, kwargs)
496    }
497
498    fn as_any(&self) -> &dyn Any {
499        self
500    }
501
502    fn shape(&self) -> &[usize] {
503        self.inner.shape()
504    }
505
506    fn dtype(&self) -> TypeId {
507        self.inner.dtype()
508    }
509
510    fn box_clone(&self) -> Box<dyn ArrayProtocol> {
511        // Clone the inner array directly
512        let inner_clone = self.inner.clone();
513        Box::new(Self {
514            inner: inner_clone,
515            phantom: PhantomData::<T>,
516        })
517    }
518}
519
520#[cfg(test)]
521mod tests {
522    use super::*;
523    use crate::array_protocol::NdarrayWrapper;
524    use ::ndarray::Array2;
525
526    #[test]
527    fn test_jit_function_creation() {
528        // Create a JIT function factory
529        let config = JITConfig {
530            backend: JITBackend::LLVM,
531            ..Default::default()
532        };
533        let factory = LLVMFunctionFactory::new(config);
534
535        // Create a simple expression
536        let expression = "x + y";
537
538        // Compile the function
539        let array_typeid = TypeId::of::<NdarrayWrapper<f64, crate::ndarray::Ix2>>();
540        let jit_function = factory
541            .create_jit_function(expression, array_typeid)
542            .expect("Operation failed");
543
544        // Check the function's properties
545        assert_eq!(jit_function.source(), expression);
546        let compile_info = jit_function.compile_info();
547        assert_eq!(
548            compile_info.get("backend").expect("Operation failed"),
549            "LLVM"
550        );
551    }
552
553    #[test]
554    fn test_jit_manager() {
555        // Initialize the JIT manager
556        let mut jit_manager = JITManager::new(JITConfig::default());
557        jit_manager.initialize();
558
559        // Check that the factories were registered
560        let array_typeid = TypeId::of::<NdarrayWrapper<f64, crate::ndarray::Ix2>>();
561        assert!(jit_manager
562            .get_factory_for_array_type(array_typeid)
563            .is_some());
564
565        // Compile a function
566        let expression = "x + y";
567        let jit_function = jit_manager
568            .compile(expression, array_typeid)
569            .expect("Operation failed");
570
571        // Check the function's properties
572        assert_eq!(jit_function.source(), expression);
573    }
574
575    #[test]
576    fn test_jit_enabled_array() {
577        // Create an ndarray
578        let array = Array2::<f64>::ones((10, 5));
579        let wrapped = NdarrayWrapper::new(array);
580
581        // Create a JIT-enabled array
582        let jit_array: JITEnabledArray<f64, _> = JITEnabledArray::new(wrapped);
583
584        // Initialize the JIT manager
585        {
586            let mut jit_manager = JITManager::global().write().expect("Operation failed");
587            jit_manager.initialize();
588        }
589
590        // Check if JIT is supported
591        assert!(jit_array.supports_jit());
592
593        // Compile a function
594        let expression = "x + y";
595        let jit_function = jit_array.compile(expression).expect("Operation failed");
596
597        // Check the function's properties
598        assert_eq!(jit_function.source(), expression);
599    }
600}
scirs2_core/array_protocol/jit_impl.rs

scirs2_core/array_protocol/
jit_impl.rs
