Remove LLVM from core crates

[0xGeorgii]

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[codecov]

Codecov Report

❌ Patch coverage is 67.31392% with 101 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
core/wasm-codegen/src/compiler.rs	64.70%	96 Missing ⚠️
core/cli/src/main.rs	0.00%	5 Missing ⚠️

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[Copilot]

Pull request overview

This pull request removes the LLVM dependency from the Inference compiler, replacing LLVM-based code generation with direct WebAssembly binary generation using the wasm-encoder crate. This is a major architectural simplification that eliminates the need for external binaries (inf-llc, rust-lld) and the LLVM toolchain.

Changes:

• Replaced LLVM IR generation with direct WASM binary generation via wasm-encoder
• Removed all external binary dependencies (inf-llc, rust-lld, libLLVM.so)
• Simplified build configuration by removing build.rs and LLVM-related Cargo settings
• Updated all tests to work with the new WASM-direct output
• Cleaned up documentation to remove LLVM references and installation instructions

Reviewed changes

Copilot reviewed 47 out of 53 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
core/wasm-codegen/src/compiler.rs	Complete rewrite to emit WASM instructions directly using wasm-encoder instead of LLVM IR
core/wasm-codegen/src/output.rs	Changed from storing LLVM IR text to storing WASM binary bytes
core/wasm-codegen/src/target.rs	Removed LLVM-specific methods (triple, cpu, llc_features, as_llc_flag)
core/wasm-codegen/src/lib.rs	Removed LLVM initialization and updated to use wasm-encoder directly
core/wasm-codegen/build.rs	Deleted - no longer needs to copy external binaries
core/wasm-codegen/Cargo.toml	Replaced inkwell dependency with wasm-encoder
tests/src/utils.rs	Removed compile_ir_to_wasm_for_tests and 160+ lines of external toolchain invocation code
tests/src/codegen/wasm/validation.rs	Updated tests from checking LLVM IR content to checking WASM opcodes
tests/src/codegen/wasm/base.rs	Added new tests for i64_uzumaki, bool_literal, and mixed_visibility; simplified instantiation
tests/test_data/codegen/wasm/base/*.wasm	Added binary WASM test data files
tests/Cargo.toml	Removed tempfile dependency
core/cli/src/toolchain/*	Removed llc.rs, lld.rs, env.rs, and paths.rs (external tool invocation)
core/cli/src/main.rs	Simplified to use WASM bytes directly from CodegenOutput
core/cli/Cargo.toml	Removed tempfile dependency
book/*.md	Moved LLVM installation guides to appendix/llvm-legacy-setup.md, updated compilation_targets.md
book/check_deps.*	Deleted dependency check scripts (no longer needed)
README.md	Removed external binary download instructions, simplified build steps
Cargo.toml	Removed inkwell workspace dependency, updated tree-sitter and anyhow versions
.cargo/config.toml	Removed LLVM library paths and linking configuration
.github/workflows/*.yml	Removed LLVM installation, binary caching, and environment setup steps

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