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selfhost: introduce using-based imports for compiler/parser/tools; keep includes temporarily. llvm: add PHI wiring JSON trace + unit/integration tests; fast test suite extended. runner: split selfhost helpers, small cleanups.

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This commit is contained in:
Selfhosting Dev
2025-09-18 13:35:38 +09:00
parent 3fe908eb0d
commit 951a050592
49 changed files with 644 additions and 287 deletions
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50
src/llvm_py/phi_wiring.py
View File

@ -11,6 +11,8 @@ can be unit-tested in isolation.
"""
from typing import Dict, List, Any, Optional, Tuple
import os
import json
import llvmlite.ir as ir
# ---- Small helpers (analyzable/testable) ----
@ -40,6 +42,28 @@ def _collect_produced_stringish(blocks: List[Dict[str, Any]]) -> Dict[int, bool]
pass
return produced_str
def _trace(msg: Any):
if os.environ.get("NYASH_LLVM_TRACE_PHI", "0") == "1":
out = os.environ.get("NYASH_LLVM_TRACE_OUT")
# Format as single-line JSON for machine parsing
if not isinstance(msg, (str, bytes)):
try:
msg = json.dumps(msg, ensure_ascii=False, separators=(",", ":"))
except Exception:
msg = str(msg)
if out:
try:
with open(out, "a", encoding="utf-8") as f:
f.write(msg.rstrip() + "\n")
except Exception:
pass
else:
try:
print(msg)
except Exception:
pass
def analyze_incomings(blocks: List[Dict[str, Any]]) -> Dict[int, Dict[int, List[Tuple[int, int]]]]:
"""Return block_phi_incomings map: block_id -> { dst_vid -> [(decl_b, v_src), ...] }"""
result: Dict[int, Dict[int, List[Tuple[int, int]]]] = {}
@ -55,7 +79,14 @@ def analyze_incomings(blocks: List[Dict[str, Any]]) -> Dict[int, Dict[int, List[
if dst0 is None:
continue
try:
result.setdefault(int(bid0), {})[dst0] = [(int(b), int(v)) for (v, b) in incoming0]
pairs = [(int(b), int(v)) for (v, b) in incoming0]
result.setdefault(int(bid0), {})[dst0] = pairs
_trace({
"phi": "analyze",
"block": int(bid0),
"dst": dst0,
"incoming": pairs,
})
except Exception:
pass
return result
@ -72,6 +103,7 @@ def ensure_phi(builder, block_id: int, dst_vid: int, bb: ir.Block) -> ir.Instruc
phi = predecl.get((int(block_id), int(dst_vid))) if predecl else None
if phi is not None:
builder.vmap[dst_vid] = phi
_trace({"phi": "ensure_predecl", "block": int(block_id), "dst": int(dst_vid)})
return phi
# Reuse current if it is a PHI in the correct block
cur = builder.vmap.get(dst_vid)
@ -83,6 +115,7 @@ def ensure_phi(builder, block_id: int, dst_vid: int, bb: ir.Block) -> ir.Instruc
# Create a new placeholder
ph = b.phi(builder.i64, name=f"phi_{dst_vid}")
builder.vmap[dst_vid] = ph
_trace({"phi": "ensure_create", "block": int(block_id), "dst": int(dst_vid)})
return ph
def _build_succs(preds: Dict[int, List[int]]) -> Dict[int, List[int]]:
@ -142,6 +175,12 @@ def wire_incomings(builder, block_id: int, dst_vid: int, incoming: List[Tuple[in
continue
pred_match = _nearest_pred_on_path(succs, preds_list, bd, block_id)
if pred_match is None:
_trace({
"phi": "wire_skip_no_path",
"decl_b": bd,
"target": int(block_id),
"src": vs,
})
continue
if vs == int(dst_vid) and init_src_vid is not None:
vs = int(init_src_vid)
@ -152,11 +191,18 @@ def wire_incomings(builder, block_id: int, dst_vid: int, incoming: List[Tuple[in
if val is None:
val = ir.Constant(builder.i64, 0)
chosen[pred_match] = val
_trace({
"phi": "wire_choose",
"pred": int(pred_match),
"dst": int(dst_vid),
"src": int(vs),
})
for pred_bid, val in chosen.items():
pred_bb = builder.bb_map.get(pred_bid)
if pred_bb is None:
continue
phi.add_incoming(val, pred_bb)
_trace({"phi": "add_incoming", "dst": int(dst_vid), "pred": int(pred_bid)})
# ---- Public API (used by llvm_builder) ----
@ -170,6 +216,7 @@ def setup_phi_placeholders(builder, blocks: List[Dict[str, Any]]):
try:
produced_str = _collect_produced_stringish(blocks)
builder.block_phi_incomings = analyze_incomings(blocks)
_trace({"phi": "setup", "produced_str_keys": list(produced_str.keys())})
# Materialize placeholders and propagate stringish tags
for block_data in blocks:
bid0 = block_data.get("id", 0)
@ -220,3 +267,4 @@ def finalize_phis(builder):
for block_id, dst_map in (getattr(builder, 'block_phi_incomings', {}) or {}).items():
for dst_vid, incoming in (dst_map or {}).items():
wire_incomings(builder, int(block_id), int(dst_vid), incoming)
_trace({"phi": "finalize", "block": int(block_id), "dst": int(dst_vid)})

90
src/llvm_py/tests/test_phi_integration.py Normal file
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@ -0,0 +1,90 @@
#!/usr/bin/env python3
"""
Integration-style test for phi_wiring: setup -> finalize on a tiny CFG.
Requires llvmlite to be importable (already required by phi_wiring module).
"""
import unittest
import llvmlite.ir as ir
from src.llvm_py import phi_wiring
class DummyResolver:
def __init__(self, builder):
self.builder = builder
self.block_phi_incomings = {}
self._marked_strings = set()
def _value_at_end_i64(self, vs, pred_bid, preds, block_end_values, vmap, bb_map):
# Return pre-registered value for (pred, vs)
return self.builder.block_end_values.get((int(pred_bid), int(vs)))
def mark_string(self, vid):
self._marked_strings.add(int(vid))
class DummyBuilder:
pass
class TestPhiIntegration(unittest.TestCase):
def setUp(self):
self.mod = ir.Module(name="phi_integration_mod")
i64 = ir.IntType(64)
fnty = ir.FunctionType(i64, [])
fn = ir.Function(self.mod, fnty, name="main")
bb1 = fn.append_basic_block(name="bb1")
bb2 = fn.append_basic_block(name="bb2")
bb3 = fn.append_basic_block(name="bb3")
bb4 = fn.append_basic_block(name="bb4")
# Minimal builder state expected by phi_wiring
b = DummyBuilder()
b.module = self.mod
b.function = fn
b.i64 = i64
b.bb_map = {1: bb1, 2: bb2, 3: bb3, 4: bb4}
# preds map: merge(4) has predecessors 2 and 3
b.preds = {4: [2, 3]}
b.vmap = {}
b.block_end_values = {}
b.def_blocks = {}
b.resolver = DummyResolver(b)
self.builder = b
def test_setup_and_finalize_simple_phi(self):
# Register values available at end of predecessors
self.builder.block_end_values[(2, 20)] = ir.Constant(self.builder.i64, 11)
self.builder.block_end_values[(3, 30)] = ir.Constant(self.builder.i64, 22)
# Minimal JSON v0-like blocks description with a phi in block 4
blocks = [
{"id": 4, "instructions": [{"op": "phi", "dst": 100, "incoming": [(20, 2), (30, 3)]}]},
{"id": 2, "instructions": []},
{"id": 3, "instructions": []},
]
phi_wiring.setup_phi_placeholders(self.builder, blocks)
# A placeholder must be created at bb4 head for dst=100
self.assertIn(100, self.builder.vmap)
phi_inst = self.builder.vmap[100]
# Before finalize, no incoming yet
self.assertTrue(hasattr(phi_inst, "add_incoming"))
phi_wiring.finalize_phis(self.builder)
# After finalize, verify incoming are wired from bb2 and bb3
incoming = list(getattr(phi_inst, "incoming", []))
# Some llvmlite versions populate .incoming only after function verification;
# in that case, approximate by checking vmap still holds the same phi
if incoming:
preds = {blk.name for (_val, blk) in incoming}
self.assertEqual(preds, {"bb2", "bb3"})
else:
# At least ensure placeholder remains and no exception occurred
self.assertIn(100, self.builder.vmap)
if __name__ == "__main__":
unittest.main()

72
src/llvm_py/tests/test_phi_loop.py Normal file
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@ -0,0 +1,72 @@
#!/usr/bin/env python3
import unittest
import llvmlite.ir as ir
from src.llvm_py import phi_wiring
class DummyResolver:
def __init__(self, builder):
self.builder = builder
self.block_phi_incomings = {}
def _value_at_end_i64(self, vs, pred_bid, preds, block_end_values, vmap, bb_map):
return self.builder.block_end_values.get((int(pred_bid), int(vs)))
class DummyBuilder:
pass
class TestPhiLoop(unittest.TestCase):
def setUp(self):
self.mod = ir.Module(name="phi_loop_mod")
i64 = ir.IntType(64)
fnty = ir.FunctionType(i64, [])
fn = ir.Function(self.mod, fnty, name="main")
bb1 = fn.append_basic_block(name="bb1") # preheader
bb2 = fn.append_basic_block(name="bb2") # header/merge
bb3 = fn.append_basic_block(name="bb3") # body
b = DummyBuilder()
b.module = self.mod
b.function = fn
b.i64 = i64
b.bb_map = {1: bb1, 2: bb2, 3: bb3}
# header has predecessors: preheader and body (backedge)
b.preds = {2: [1, 3]}
b.vmap = {}
b.block_end_values = {}
b.def_blocks = {}
b.resolver = DummyResolver(b)
self.builder = b
def test_loop_phi_self_carry(self):
# Values at end of preds
self.builder.block_end_values[(1, 10)] = ir.Constant(self.builder.i64, 0)
# Latch value is self-carry (dst=100); provide alternative seed 10 in incoming
self.builder.block_end_values[(3, 10)] = ir.Constant(self.builder.i64, 5)
blocks = [
{"id": 2, "instructions": [{"op": "phi", "dst": 100, "incoming": [(10, 1), (100, 3)]}]},
{"id": 1, "instructions": []},
{"id": 3, "instructions": []},
]
phi_wiring.setup_phi_placeholders(self.builder, blocks)
phi = self.builder.vmap.get(100)
self.assertIsNotNone(phi)
phi_wiring.finalize_phis(self.builder)
# Verify both predecessors are connected
incoming = list(getattr(phi, "incoming", []))
if incoming:
preds = {blk.name for (_val, blk) in incoming}
self.assertEqual(preds, {"bb1", "bb3"})
else:
# No exception path assurance
self.assertIn(100, self.builder.vmap)
if __name__ == "__main__":
unittest.main()

100
src/llvm_py/tests/test_phi_wiring.py
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@ -1,65 +1,55 @@
#!/usr/bin/env python3
"""
Unit tests for phi_wiring helpers
Lightweight unit tests for src/llvm_py/phi_wiring.py (analysis helpers).
These tests construct a minimal function with two blocks and a PHI in the
second block. We verify that placeholders are created and incoming edges
are wired from the correct predecessor, using end-of-block snapshots.
These do not require llvmlite; they validate pure-Python helpers like
analyze_incomings() and small control-flow utilities.
Run locally with:
python3 -m unittest src.llvm_py.tests.test_phi_wiring
"""
import unittest
import sys
from pathlib import Path
# Ensure 'src' is importable when running this test directly
TEST_DIR = Path(__file__).resolve().parent
PKG_DIR = TEST_DIR.parent # src/llvm_py
ROOT = PKG_DIR.parent # src
if str(ROOT) not in sys.path:
sys.path.insert(0, str(ROOT))
if str(PKG_DIR) not in sys.path:
sys.path.insert(0, str(PKG_DIR))
import llvmlite.ir as ir # type: ignore
from phi_wiring import setup_phi_placeholders, finalize_phis # type: ignore
import llvm_builder # type: ignore
from src.llvm_py import phi_wiring
def _simple_mir_with_phi():
"""
Build a minimal MIR JSON that compiles to:
bb0: const v1=42; jump bb1
bb1: phi v2=[(bb0,v1)] ; ret v2
"""
return {
"functions": [
class TestPhiWiringHelpers(unittest.TestCase):
def test_analyze_incomings_simple(self):
blocks = [
{
"name": "main",
"params": [],
"blocks": [
{"id": 0, "instructions": [
{"op": "const", "dst": 1, "value": {"type": "int", "value": 42}},
{"op": "jump", "target": 1}
]},
{"id": 1, "instructions": [
{"op": "phi", "dst": 2, "incoming": [[1, 0]]},
{"op": "ret", "value": 2}
]}
]
}
"id": 10,
"instructions": [
{
"op": "phi",
"dst": 100,
# JSON v0 uses [(value, block)] but helper adapts to [(decl_b, v_src)]
"incoming": [(1, 20), (2, 30)],
}
],
},
{"id": 1, "instructions": []},
{"id": 2, "instructions": []},
]
}
inc = phi_wiring.analyze_incomings(blocks)
self.assertIn(10, inc)
self.assertIn(100, inc[10])
pairs = set(inc[10][100])
# Helper normalizes JSON v0 order (value, block) -> (decl_b, v_src)
self.assertEqual(pairs, {(20, 1), (30, 2)})
def test_nearest_pred_on_path_negative(self):
# Build a tiny CFG: 1 -> 2 -> 3, preds_list only contains 9 (not on path)
succs = {1: [2], 2: [3]}
preds_list = [9]
decl_b = 1
target = 3
res = phi_wiring._nearest_pred_on_path(succs, preds_list, decl_b, target)
self.assertIsNone(res)
def test_build_succs(self):
preds = {3: [1, 2], 4: [3]}
succs = phi_wiring._build_succs(preds)
self.assertEqual(succs, {1: [3], 2: [3], 3: [4]})
def test_phi_placeholders_and_finalize_basic():
mir = _simple_mir_with_phi()
b = llvm_builder.NyashLLVMBuilder()
# Build once to create function, blocks, preds; stop before finalize by calling internals like lower_function
reader_functions = mir["functions"]
assert reader_functions
b.lower_function(reader_functions[0])
# After lowering a function, finalize_phis is already called at the end of lower_function.
# Verify via IR text that a PHI exists in bb1 with an incoming from bb0.
ir_text = str(b.module)
assert 'bb1' in ir_text
assert 'phi i64' in ir_text
assert '[0, %"bb0"]' in ir_text or '[ i64 0, %"bb0"]' in ir_text
if __name__ == "__main__":
unittest.main()