JIT Compiler Module for Shape

Compiles Shape bytecode to native x86-64/ARM machine code using Cranelift for high-performance strategy execution in backtesting.

Module Structure

• ffi::jit_kinds - JIT-specific heap kinds and allocation types
• ffi::value_ffi - NaN-boxing value encoding/decoding helpers
• context - JITContext, JITDataFrame, and related structures
• ffi - FFI functions called from JIT-compiled code
• loop_analysis - Loop analysis for JIT optimization
• osr_compiler - OSR (On-Stack Replacement) loop compilation
• ffi_refs - FFI function references for heap operations
• compiler - JITCompiler implementation (split into logical modules)
• core - Legacy re-exports and tests