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test_bytecode.py
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test_bytecode.py
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import unittest
from typing import Any
import bytecode
import scheme_types
import sexp
from bytecode import Binop, BoolLit, NumLit, SymLit, Var
from sexp import SBool, SNum, SSym, SVect
class BytecodeTestCase(unittest.TestCase):
def test_example_recursive(self) -> None:
"""
function list? (v0) entry=bb0
bb0:
v1 = lookup 'nil?
v2 = call v1 (v0)
br v2 bb1
v3 = lookup 'pair?
v4 = call v3 (v0)
brn v4 bb2
v5 = lookup 'cdr
v6 = call v5 (v0)
v7 = lookup 'list?
v8 = call v7 (v6)
return v8
bb1:
return 'true
bb2:
return 'false
"""
bb0 = bytecode.BasicBlock("bb0")
bb1 = bytecode.BasicBlock("bb1")
bb2 = bytecode.BasicBlock("bb2")
is_list = bytecode.Function([Var("v0")], bb0)
bb0.add_inst(bytecode.LookupInst(Var("v1"), SymLit(SSym("nil?"))))
bb0.add_inst(bytecode.CallInst(Var("v2"), Var("v1"), [Var("v1")]))
bb0.add_inst(bytecode.BrInst(Var("v2"), bb1))
bb0.add_inst(bytecode.LookupInst(Var("v3"), SymLit(SSym("pair?"))))
bb0.add_inst(bytecode.CallInst(Var("v4"), Var("v3"), [Var("v0")]))
bb0.add_inst(bytecode.BrnInst(Var("v4"), bb2))
bb0.add_inst(bytecode.LookupInst(Var("v5"), SymLit(SSym("cdr"))))
bb0.add_inst(bytecode.CallInst(Var("v6"), Var("v5"), [Var("v0")]))
bb0.add_inst(bytecode.LookupInst(Var("v7"), SymLit(SSym("list?"))))
bb0.add_inst(bytecode.CallInst(Var("v8"), Var("v7"), [Var("v6")]))
bb0.add_inst(bytecode.ReturnInst(Var("v8")))
bb1.add_inst(bytecode.ReturnInst(SymLit(SSym("true"))))
bb2.add_inst(bytecode.ReturnInst(SymLit(SSym("false"))))
# These tests are just to test the API
assert is_list
def test_example_tail_call(self) -> None:
"""
function list? (v0) entry=bb0
bb0:
v1 = lookup 'nil?
v2 = call v1 (v0)
br v2 bb1
v3 = lookup 'pair?
v4 = call v3 (v0)
brn v4 bb2
v5 = lookup 'cdr
v0 = call v5 (v0)
jmp bb0
bb1:
return 'true
bb2:
return 'false
"""
bb0 = bytecode.BasicBlock("bb0")
bb1 = bytecode.BasicBlock("bb1")
bb2 = bytecode.BasicBlock("bb2")
is_list = bytecode.Function([Var("v0")], bb0)
bb0.add_inst(bytecode.LookupInst(Var("v1"), SymLit(SSym("nil?"))))
bb0.add_inst(bytecode.CallInst(Var("v2"), Var("v1"), [Var("v0")]))
bb0.add_inst(bytecode.BrInst(Var("v2"), bb1))
bb0.add_inst(bytecode.LookupInst(Var("v3"), SymLit(SSym("pair?"))))
bb0.add_inst(bytecode.CallInst(Var("v4"), Var("v3"), [Var("v0")]))
bb0.add_inst(bytecode.BrnInst(Var("v4"), bb2))
bb0.add_inst(bytecode.LookupInst(Var("v5"), SymLit(SSym("global"))))
bb0.add_inst(bytecode.CallInst(Var("v0"), Var("v5"), [Var("v0")]))
bb0.add_inst(bytecode.JmpInst(bb0))
bb1.add_inst(bytecode.ReturnInst(SymLit(SSym("true"))))
bb2.add_inst(bytecode.ReturnInst(SymLit(SSym("false"))))
assert is_list
def test_example_inlined(self) -> None:
"""
function list? (v0) entry=bb0
bb0:
v1 = typeof v0
v2 = sym_eq v1 'vector
brn v2 false
v3 = length v0
v4 = num_eq v3 0
br v4 true
v5 = num_eq v3 2
brn v5 false
v0 = load v0 [1]
jmp bb0
true:
return 'true
false:
return 'false
"""
bb0 = bytecode.BasicBlock("bb0")
true = bytecode.BasicBlock("true")
false = bytecode.BasicBlock("false")
is_list = bytecode.Function([Var("v0")], bb0)
# These tests are just to test the API
bb0.add_inst(bytecode.TypeofInst(Var("v1"), Var("v0")))
bb0.add_inst(bytecode.BinopInst(
Var("v2"), Binop.SYM_EQ, Var("v1"), SymLit(SSym("vector"))))
bb0.add_inst(bytecode.BrnInst(Var("v2"), false))
bb0.add_inst(bytecode.LengthInst(Var("v3"), Var("v0")))
bb0.add_inst(bytecode.BinopInst(
Var("v4"), Binop.NUM_EQ, Var("v3"), NumLit(SNum(0))))
bb0.add_inst(bytecode.BrInst(Var("v4"), true))
bb0.add_inst(bytecode.BinopInst(
Var("v5"), Binop.NUM_EQ, Var("v3"), NumLit(SNum(2))))
bb0.add_inst(bytecode.BrnInst(Var("v5"), false))
bb0.add_inst(bytecode.LoadInst(Var("v0"), Var("v0"), NumLit(SNum(1))))
bb0.add_inst(bytecode.JmpInst(bb0))
true.add_inst(bytecode.ReturnInst(BoolLit(SBool(True))))
false.add_inst(bytecode.ReturnInst(BoolLit(SBool(False))))
env = bytecode.EvalEnv(local_env={Var("v0"): SNum(42)})
gen = bytecode.ResultGenerator(is_list.run(env))
gen.run()
self.assertEqual(gen.value, SBool(False))
env = bytecode.EvalEnv(local_env={
Var("v0"): SVect([SNum(42), SVect([SNum(69), SVect([])])])
})
gen = bytecode.ResultGenerator(is_list.run(env))
gen.run()
self.assertEqual(gen.value, SBool(True))
def test_call_specialized(self) -> None:
bb0 = bytecode.BasicBlock("bb0")
bb0.add_inst(bytecode.ReturnInst(BoolLit(SBool(False))))
byte_func = bytecode.Function([Var("x")], bb0)
bb0_specialized = bytecode.BasicBlock("bb0")
bb0_specialized.add_inst(bytecode.ReturnInst(BoolLit(SBool(True))))
byte_func_specialized = bytecode.Function([Var("x")], bb0_specialized)
func = sexp.SFunction(
SSym("func"), [SSym("x")], sexp.to_slist([]),
code=byte_func, is_lambda=False,
specializations={
(scheme_types.SchemeSym,): byte_func_specialized
},
)
env = bytecode.EvalEnv(local_env={Var('f'): func})
bytecode.CallInst(Var('y'), Var('f'), [NumLit(SNum(42))]).run(env)
assert env[Var('y')] == SBool(False)
bytecode.CallInst(Var('y'), Var('f'), [SymLit(SSym('x'))]).run(env)
assert env[Var('y')] == SBool(True)
bytecode.CallInst(Var('y'), Var('f'), [SymLit(SSym('x'))],
specialization=(scheme_types.SchemeSym,)).run(env)
assert env[Var('y')] == SBool(True)
# If specialization not found, fall back to dynamic dispatch
bytecode.CallInst(
Var('y'), Var('f'), [SymLit(SSym('x'))],
specialization=(scheme_types.SchemeNum,)).run(env)
self.assertEqual(env[Var('y')], SBool(True))
bytecode.CallInst(
Var('y'), Var('f'), [NumLit(SNum(42))],
specialization=(scheme_types.SchemeNum,)).run(env)
self.assertEqual(env[Var('y')], SBool(False))