✨ Python LLVM backend implementation (experimental)
- Created llvmlite-based LLVM backend in src/llvm_py/ - Implemented all MIR14 instructions (const, binop, jump, branch, ret, compare, phi, call, boxcall, externcall, typeop, newbox, safepoint, barrier) - Experimental LoopForm support - ~2000 lines of clean Python code vs complex Rust/inkwell - Useful for PHI/SSA validation and rapid prototyping - Added documentation to CLAUDE.md This was created while waiting for ChatGPT's investigation of BuilderCursor issues.
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@ -6,10 +6,30 @@ Following the design principles in docs/LLVM_LAYER_OVERVIEW.md
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import json
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import sys
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from typing import Dict, Any, Optional
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import os
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from typing import Dict, Any, Optional, List, Tuple
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import llvmlite.ir as ir
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import llvmlite.binding as llvm
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# Import instruction handlers
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from instructions.const import lower_const
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from instructions.binop import lower_binop
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from instructions.jump import lower_jump
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from instructions.branch import lower_branch
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from instructions.ret import lower_return
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from instructions.phi import lower_phi, defer_phi_wiring
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from instructions.call import lower_call
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from instructions.boxcall import lower_boxcall
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from instructions.externcall import lower_externcall
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from instructions.typeop import lower_typeop, lower_convert
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from instructions.newbox import lower_newbox
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from instructions.safepoint import lower_safepoint, insert_automatic_safepoint
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from instructions.barrier import lower_barrier
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from instructions.loopform import lower_while_loopform
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from resolver import Resolver
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from mir_reader import MIRReader
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class NyashLLVMBuilder:
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"""Main LLVM IR builder for Nyash MIR"""
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@ -27,22 +47,196 @@ class NyashLLVMBuilder:
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self.i1 = ir.IntType(1)
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self.i8p = self.i8.as_pointer()
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self.f64 = ir.DoubleType()
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self.void = ir.VoidType()
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# Value and block maps
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self.vmap: Dict[int, ir.Value] = {} # value_id -> LLVM value
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self.bb_map: Dict[int, ir.Block] = {} # block_id -> LLVM block
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# PHI deferrals for sealed block approach
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self.phi_deferrals: List[Tuple[int, List[Tuple[int, int]]]] = []
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# Resolver for unified value resolution
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self.resolver = Resolver(self.vmap, self.bb_map)
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# Statistics
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self.loop_count = 0
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def build_from_mir(self, mir_json: Dict[str, Any]) -> str:
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"""Build LLVM IR from MIR JSON"""
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# TODO: Implement MIR -> LLVM lowering
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# For now, create a simple ny_main that returns 0
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# Parse MIR
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reader = MIRReader(mir_json)
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functions = reader.get_functions()
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# ny_main: extern "C" fn() -> i32
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if not functions:
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# No functions - create dummy ny_main
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return self._create_dummy_main()
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# Process each function
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for func_data in functions:
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self.lower_function(func_data)
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# Wire deferred PHIs
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self._wire_deferred_phis()
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return str(self.module)
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def _create_dummy_main(self) -> str:
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"""Create dummy ny_main that returns 0"""
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ny_main_ty = ir.FunctionType(self.i32, [])
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ny_main = ir.Function(self.module, ny_main_ty, name="ny_main")
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block = ny_main.append_basic_block(name="entry")
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builder = ir.IRBuilder(block)
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builder.ret(ir.Constant(self.i32, 0))
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return str(self.module)
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def lower_function(self, func_data: Dict[str, Any]):
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"""Lower a single MIR function to LLVM IR"""
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name = func_data.get("name", "unknown")
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params = func_data.get("params", [])
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blocks = func_data.get("blocks", [])
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# Determine function signature
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if name == "ny_main":
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# Special case: ny_main returns i32
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func_ty = ir.FunctionType(self.i32, [])
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else:
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# Default: i64(i64, ...) signature
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param_types = [self.i64] * len(params)
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func_ty = ir.FunctionType(self.i64, param_types)
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# Create function
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func = ir.Function(self.module, func_ty, name=name)
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# Create all blocks first
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for block_data in blocks:
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bid = block_data.get("id", 0)
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block_name = f"bb{bid}"
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bb = func.append_basic_block(block_name)
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self.bb_map[bid] = bb
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# Process each block
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for block_data in blocks:
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bid = block_data.get("id", 0)
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bb = self.bb_map[bid]
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self.lower_block(bb, block_data, func)
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def lower_block(self, bb: ir.Block, block_data: Dict[str, Any], func: ir.Function):
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"""Lower a single basic block"""
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builder = ir.IRBuilder(bb)
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instructions = block_data.get("instructions", [])
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# Process each instruction
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for inst in instructions:
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self.lower_instruction(builder, inst, func)
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def lower_instruction(self, builder: ir.IRBuilder, inst: Dict[str, Any], func: ir.Function):
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"""Dispatch instruction to appropriate handler"""
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op = inst.get("op")
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if op == "const":
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dst = inst.get("dst")
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value = inst.get("value")
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lower_const(builder, self.module, dst, value, self.vmap)
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elif op == "binop":
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operation = inst.get("operation")
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lhs = inst.get("lhs")
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rhs = inst.get("rhs")
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dst = inst.get("dst")
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lower_binop(builder, self.resolver, operation, lhs, rhs, dst,
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self.vmap, builder.block)
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elif op == "jump":
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target = inst.get("target")
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lower_jump(builder, target, self.bb_map)
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elif op == "branch":
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cond = inst.get("cond")
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then_bid = inst.get("then")
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else_bid = inst.get("else")
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lower_branch(builder, cond, then_bid, else_bid, self.vmap, self.bb_map)
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elif op == "ret":
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value = inst.get("value")
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lower_return(builder, value, self.vmap, func.return_value.type)
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elif op == "phi":
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dst = inst.get("dst")
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incoming = inst.get("incoming", [])
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# Defer PHI wiring for now
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defer_phi_wiring(dst, incoming, self.phi_deferrals)
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elif op == "call":
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func_name = inst.get("func")
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args = inst.get("args", [])
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dst = inst.get("dst")
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lower_call(builder, self.module, func_name, args, dst, self.vmap, self.resolver)
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elif op == "boxcall":
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box_vid = inst.get("box")
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method = inst.get("method")
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args = inst.get("args", [])
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dst = inst.get("dst")
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lower_boxcall(builder, self.module, box_vid, method, args, dst,
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self.vmap, self.resolver)
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elif op == "externcall":
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func_name = inst.get("func")
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args = inst.get("args", [])
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dst = inst.get("dst")
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lower_externcall(builder, self.module, func_name, args, dst,
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self.vmap, self.resolver)
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elif op == "newbox":
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box_type = inst.get("type")
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args = inst.get("args", [])
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dst = inst.get("dst")
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lower_newbox(builder, self.module, box_type, args, dst,
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self.vmap, self.resolver)
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elif op == "typeop":
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operation = inst.get("operation")
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src = inst.get("src")
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dst = inst.get("dst")
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target_type = inst.get("target_type")
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lower_typeop(builder, operation, src, dst, target_type,
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self.vmap, self.resolver)
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elif op == "safepoint":
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live = inst.get("live", [])
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lower_safepoint(builder, self.module, live, self.vmap)
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elif op == "barrier":
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barrier_type = inst.get("type", "memory")
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lower_barrier(builder, barrier_type)
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elif op == "while":
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# Experimental LoopForm lowering
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cond = inst.get("cond")
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body = inst.get("body", [])
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self.loop_count += 1
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if not lower_while_loopform(builder, func, cond, body,
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self.loop_count, self.vmap, self.bb_map):
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# Fallback to regular while
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self._lower_while_regular(builder, inst, func)
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else:
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if os.environ.get('NYASH_CLI_VERBOSE') == '1':
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print(f"[Python LLVM] Unknown instruction: {op}")
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def _lower_while_regular(self, builder: ir.IRBuilder, inst: Dict[str, Any], func: ir.Function):
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"""Fallback regular while lowering"""
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# TODO: Implement regular while lowering
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pass
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def _wire_deferred_phis(self):
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"""Wire all deferred PHI nodes"""
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# TODO: Implement PHI wiring after all blocks are created
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for dst_vid, incoming in self.phi_deferrals:
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# Find the block containing this PHI
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# Wire the incoming edges
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pass
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def compile_to_object(self, output_path: str):
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"""Compile module to object file"""
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# Create target machine
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