602 lines
23 KiB
Python
602 lines
23 KiB
Python
#! /usr/bin/env python
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# ______________________________________________________________________
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'''Defines a bytecode based LLVM translator for llpython code.
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'''
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# ______________________________________________________________________
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# Module imports
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import opcode
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import types
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import logging
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import llvm.core as lc
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import opcode_util
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import bytetype
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from bytecode_visitor import BytecodeFlowVisitor
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from byte_flow import BytecodeFlowBuilder
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from byte_control import ControlFlowBuilder
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from phi_injector import PhiInjector, synthetic_opname
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# ______________________________________________________________________
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# Module data
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logger = logging.getLogger(__name__)
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# XXX Stolen from numba.translate:
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_compare_mapping_float = {'>':lc.FCMP_OGT,
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'<':lc.FCMP_OLT,
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'==':lc.FCMP_OEQ,
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'>=':lc.FCMP_OGE,
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'<=':lc.FCMP_OLE,
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'!=':lc.FCMP_ONE}
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_compare_mapping_sint = {'>':lc.ICMP_SGT,
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'<':lc.ICMP_SLT,
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'==':lc.ICMP_EQ,
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'>=':lc.ICMP_SGE,
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'<=':lc.ICMP_SLE,
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'!=':lc.ICMP_NE}
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# XXX Stolen from numba.llvm_types:
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class LLVMCaster (object):
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def build_pointer_cast(_, builder, lval1, lty2):
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return builder.bitcast(lval1, lty2)
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def build_int_cast(_, builder, lval1, lty2, unsigned = False):
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width1 = lval1.type.width
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width2 = lty2.width
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ret_val = lval1
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if width2 > width1:
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if unsigned:
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ret_val = builder.zext(lval1, lty2)
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else:
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ret_val = builder.sext(lval1, lty2)
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elif width2 < width1:
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ret_val = builder.trunc(lval1, lty2)
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return ret_val
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def build_float_ext(_, builder, lval1, lty2):
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return builder.fpext(lval1, lty2)
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def build_float_trunc(_, builder, lval1, lty2):
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return builder.fptrunc(lval1, lty2)
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def build_int_to_float_cast(_, builder, lval1, lty2, unsigned = False):
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ret_val = None
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if unsigned:
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ret_val = builder.uitofp(lval1, lty2)
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else:
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ret_val = builder.sitofp(lval1, lty2)
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return ret_val
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def build_int_to_ptr_cast(_, builder, lval1, lty2):
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return builder.inttoptr(lval1, lty2)
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def build_float_to_int_cast(_, builder, lval1, lty2, unsigned = False):
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ret_val = None
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if unsigned:
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ret_val = builder.fptoui(lval1, lty2)
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else:
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ret_val = builder.fptosi(lval1, lty2)
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return ret_val
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CAST_MAP = {
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lc.TYPE_POINTER : build_pointer_cast,
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lc.TYPE_INTEGER: build_int_cast,
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(lc.TYPE_FLOAT, lc.TYPE_DOUBLE) : build_float_ext,
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(lc.TYPE_DOUBLE, lc.TYPE_FLOAT) : build_float_trunc,
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(lc.TYPE_INTEGER, lc.TYPE_FLOAT) : build_int_to_float_cast,
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(lc.TYPE_INTEGER, lc.TYPE_DOUBLE) : build_int_to_float_cast,
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(lc.TYPE_INTEGER, lc.TYPE_POINTER) : build_int_to_ptr_cast,
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(lc.TYPE_FLOAT, lc.TYPE_INTEGER) : build_float_to_int_cast,
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(lc.TYPE_DOUBLE, lc.TYPE_INTEGER) : build_float_to_int_cast,
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}
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@classmethod
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def build_cast(cls, builder, lval1, lty2, *args, **kws):
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ret_val = lval1
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lty1 = lval1.type
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lkind1 = lty1.kind
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lkind2 = lty2.kind
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if lkind1 == lkind2:
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if lkind1 in cls.CAST_MAP:
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ret_val = cls.CAST_MAP[lkind1](cls, builder, lval1, lty2,
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*args, **kws)
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else:
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raise NotImplementedError(lkind1)
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else:
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map_index = (lkind1, lkind2)
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if map_index in cls.CAST_MAP:
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ret_val = cls.CAST_MAP[map_index](cls, builder, lval1, lty2,
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*args, **kws)
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else:
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raise NotImplementedError(lkind1, lkind2)
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return ret_val
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# ______________________________________________________________________
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# Class definitions
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class LLVMTranslator (BytecodeFlowVisitor):
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'''Transformer responsible for visiting a set of bytecode flow
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trees, emitting LLVM code.
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Unlike other translators in :py:mod:`llpython`, this
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incorporates the full transformation chain, starting with
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:py:class:`llpython.byte_flow.BytecodeFlowBuilder`, then
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:py:class:`llpython.byte_control.ControlFlowBuilder`, and
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then :py:class:`llpython.phi_injector.PhiInjector`.'''
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def __init__ (self, llvm_module = None, *args, **kws):
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'''Constructor for LLVMTranslator.'''
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super(LLVMTranslator, self).__init__(*args, **kws)
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if llvm_module is None:
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llvm_module = lc.Module.new('Translated_Module_%d' % (id(self),))
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self.llvm_module = llvm_module
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self.bytecode_flow_builder = BytecodeFlowBuilder()
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self.control_flow_builder = ControlFlowBuilder()
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self.phi_injector = PhiInjector()
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def translate (self, function, llvm_type = None, llvm_function = None,
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env = None):
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'''Translate a function to the given LLVM function type.
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If no type is given, then assume the function is of LLVM type
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"void ()".
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The optional env parameter allows extension of the global
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environment.'''
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if llvm_type is None:
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if llvm_function is None:
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llvm_type = lc.Type.function(lvoid, ())
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else:
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llvm_type = llvm_function.type.pointee
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if env is None:
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env = {}
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else:
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env = env.copy()
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env.update((name, method)
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for name, method in lc.Builder.__dict__.items()
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if not name.startswith('_'))
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env.update((name, value)
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for name, value in bytetype.__dict__.items()
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if not name.startswith('_'))
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self.loop_stack = []
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self.llvm_type = llvm_type
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self.target_function_name = env.get('target_function_name',
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function.__name__)
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self.function = function
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self.code_obj = opcode_util.get_code_object(function)
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func_globals = getattr(function, 'func_globals',
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getattr(function, '__globals__', {})).copy()
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func_globals.update(env)
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self.globals = func_globals
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nargs = self.code_obj.co_argcount
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self.cfg = self.control_flow_builder.visit(
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self.bytecode_flow_builder.visit(self.code_obj), nargs)
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self.llvm_function = llvm_function
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flow = self.phi_injector.visit_cfg(self.cfg, nargs)
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ret_val = self.visit(flow)
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del self.cfg
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del self.globals
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del self.code_obj
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del self.target_function_name
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del self.function
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del self.llvm_type
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del self.loop_stack
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return ret_val
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def enter_flow_object (self, flow):
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super(LLVMTranslator, self).enter_flow_object(flow)
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if self.llvm_function is None:
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self.llvm_function = self.llvm_module.add_function(
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self.llvm_type, self.target_function_name)
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self.llvm_blocks = {}
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self.llvm_definitions = {}
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self.pending_phis = {}
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for block in self.block_list:
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if 0 in self.cfg.blocks_reaching[block]:
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bb = self.llvm_function.append_basic_block(
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'BLOCK_%d' % (block,))
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self.llvm_blocks[block] = bb
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def exit_flow_object (self, flow):
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super(LLVMTranslator, self).exit_flow_object(flow)
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ret_val = self.llvm_function
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del self.pending_phis
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del self.llvm_definitions
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del self.llvm_blocks
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if __debug__ and logger.getEffectiveLevel() < logging.DEBUG:
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logger.debug(str(ret_val))
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return ret_val
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def enter_block (self, block):
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ret_val = False
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if block in self.llvm_blocks:
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self.llvm_block = self.llvm_blocks[block]
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self.builder = lc.Builder.new(self.llvm_block)
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ret_val = True
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return ret_val
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def exit_block (self, block):
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del self.llvm_block
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del self.builder
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def visit_synthetic_op (self, i, op, arg, *args, **kws):
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method = getattr(self, 'op_%s' % (synthetic_opname[op],))
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return method(i, op, arg, *args, **kws)
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def op_REF_ARG (self, i, op, arg, *args, **kws):
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return [self.llvm_function.args[arg]]
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def op_BUILD_PHI (self, i, op, arg, *args, **kws):
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phi_type = None
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incoming = []
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pending = []
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for child_arg in arg:
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child_block, _, child_opname, child_arg, _ = child_arg
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assert child_opname == 'REF_DEF'
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if child_arg in self.llvm_definitions:
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child_def = self.llvm_definitions[child_arg]
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if phi_type is None:
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phi_type = child_def.type
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incoming.append((child_block, child_def))
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else:
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pending.append((child_arg, child_block))
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phi = self.builder.phi(phi_type)
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for block_index, defn in incoming:
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phi.add_incoming(defn, self.llvm_blocks[block_index])
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for defn_index, block_index in pending:
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if defn_index not in self.pending_phis:
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self.pending_phis[defn_index] = []
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self.pending_phis[defn_index].append((phi, block_index))
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return [phi]
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def op_DEFINITION (self, i, op, def_index, *args, **kws):
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assert len(args) == 1
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arg = args[0]
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if def_index in self.pending_phis:
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for phi, block_index in self.pending_phis[def_index]:
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phi.add_incoming(arg, self.llvm_blocks[block_index])
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self.llvm_definitions[def_index] = arg
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return args
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def op_REF_DEF (self, i, op, arg, *args, **kws):
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return [self.llvm_definitions[arg]]
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def op_BINARY_ADD (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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if arg1.type.kind == lc.TYPE_INTEGER:
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ret_val = [self.builder.add(arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.fadd(arg1, arg2)]
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elif arg1.type.kind == lc.TYPE_POINTER:
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ret_val = [self.builder.gep(arg1, [arg2])]
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else:
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raise NotImplementedError("LLVMTranslator.op_BINARY_ADD for %r" %
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(args,))
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return ret_val
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def op_BINARY_AND (self, i, op, arg, *args, **kws):
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return [self.builder.and_(args[0], args[1])]
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def op_BINARY_DIVIDE (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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if arg1.type.kind == lc.TYPE_INTEGER:
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ret_val = [self.builder.sdiv(arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.fdiv(arg1, arg2)]
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else:
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raise NotImplementedError("LLVMTranslator.op_BINARY_DIVIDE for %r"
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% (args,))
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return ret_val
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def op_BINARY_FLOOR_DIVIDE (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_BINARY_FLOOR_DIVIDE")
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def op_BINARY_LSHIFT (self, i, op, arg, *args, **kws):
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return [self.builder.shl(args[0], args[1])]
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def op_BINARY_MODULO (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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if arg1.type.kind == lc.TYPE_INTEGER:
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ret_val = [self.builder.srem(arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.frem(arg1, arg2)]
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else:
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raise NotImplementedError("LLVMTranslator.op_BINARY_MODULO for %r"
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% (args,))
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return ret_val
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def op_BINARY_MULTIPLY (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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if arg1.type.kind == lc.TYPE_INTEGER:
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ret_val = [self.builder.mul(arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.fmul(arg1, arg2)]
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else:
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raise NotImplementedError("LLVMTranslator.op_BINARY_MULTIPLY for "
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"%r" % (args,))
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return ret_val
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def op_BINARY_OR (self, i, op, arg, *args, **kws):
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return [self.builder.or_(args[0], args[1])]
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def op_BINARY_POWER (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_BINARY_POWER")
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def op_BINARY_RSHIFT (self, i, op, arg, *args, **kws):
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return [self.builder.lshr(args[0], args[1])]
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def op_BINARY_SUBSCR (self, i, op, arg, *args, **kws):
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arr_val = args[0]
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index_vals = args[1:]
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ret_val = gep_result = self.builder.gep(arr_val, index_vals)
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if (gep_result.type.kind == lc.TYPE_POINTER and
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gep_result.type.pointee.kind != lc.TYPE_POINTER):
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ret_val = self.builder.load(gep_result)
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return [ret_val]
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def op_BINARY_SUBTRACT (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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if arg1.type.kind == lc.TYPE_INTEGER:
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ret_val = [self.builder.sub(arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.fsub(arg1, arg2)]
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else:
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raise NotImplementedError("LLVMTranslator.op_BINARY_SUBTRACT for "
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"%r" % (args,))
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return ret_val
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op_BINARY_TRUE_DIVIDE = op_BINARY_DIVIDE
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def op_BINARY_XOR (self, i, op, arg, *args, **kws):
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return [self.builder.xor(args[0], args[1])]
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def op_BREAK_LOOP (self, i, op, arg, *args, **kws):
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return [self.builder.branch(self.llvm_blocks[arg])]
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def op_BUILD_SLICE (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_BUILD_SLICE")
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def op_BUILD_TUPLE (self, i, op, arg, *args, **kws):
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return args
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def op_CALL_FUNCTION (self, i, op, arg, *args, **kws):
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fn = args[0]
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args = args[1:]
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fn_name = getattr(fn, '__name__', None)
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if isinstance(fn, (types.FunctionType, types.MethodType)):
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ret_val = [fn(self.builder, *args)]
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elif isinstance(fn, lc.Value):
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ret_val = [self.builder.call(fn, args)]
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elif isinstance(fn, lc.Type):
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if isinstance(fn, lc.FunctionType):
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ret_val = [self.builder.call(
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self.llvm_module.get_or_insert_function(fn, fn_name),
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args)]
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else:
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assert len(args) == 1
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ret_val = [LLVMCaster.build_cast(self.builder, args[0], fn)]
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else:
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raise NotImplementedError("Don't know how to call %s() (%r @ %d)!"
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% (fn_name, fn, i))
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return ret_val
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def op_CALL_FUNCTION_KW (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_CALL_FUNCTION_KW")
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def op_CALL_FUNCTION_VAR (self, i, op, arg, *args, **kws):
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args = list(args)
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var_args = list(args.pop())
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args.extend(var_args)
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return self.op_CALL_FUNCTION(i, op, arg, *args, **kws)
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def op_CALL_FUNCTION_VAR_KW (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_CALL_FUNCTION_VAR_KW")
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def op_COMPARE_OP (self, i, op, arg, *args, **kws):
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arg1, arg2 = args
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cmp_kind = opcode.cmp_op[arg]
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if isinstance(arg1.type, lc.IntegerType):
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ret_val = [self.builder.icmp(_compare_mapping_sint[cmp_kind],
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arg1, arg2)]
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elif arg1.type.kind in (lc.TYPE_FLOAT, lc.TYPE_DOUBLE):
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ret_val = [self.builder.fcmp(_compare_mapping_float[cmp_kind],
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arg1, arg2)]
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else:
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raise NotImplementedError('Comparison of type %r' % (arg1.type,))
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return ret_val
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def op_CONTINUE_LOOP (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_CONTINUE_LOOP")
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def op_DELETE_ATTR (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_DELETE_ATTR")
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def op_DELETE_SLICE (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_DELETE_SLICE")
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def op_FOR_ITER (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_FOR_ITER")
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def op_GET_ITER (self, i, op, arg, *args, **kws):
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raise NotImplementedError("LLVMTranslator.op_GET_ITER")
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op_INPLACE_ADD = op_BINARY_ADD
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op_INPLACE_AND = op_BINARY_AND
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op_INPLACE_DIVIDE = op_BINARY_DIVIDE
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op_INPLACE_FLOOR_DIVIDE = op_BINARY_FLOOR_DIVIDE
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op_INPLACE_LSHIFT = op_BINARY_LSHIFT
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op_INPLACE_MODULO = op_BINARY_MODULO
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op_INPLACE_MULTIPLY = op_BINARY_MULTIPLY
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op_INPLACE_OR = op_BINARY_OR
|
|
op_INPLACE_POWER = op_BINARY_POWER
|
|
op_INPLACE_RSHIFT = op_BINARY_RSHIFT
|
|
op_INPLACE_SUBTRACT = op_BINARY_SUBTRACT
|
|
op_INPLACE_TRUE_DIVIDE = op_BINARY_TRUE_DIVIDE
|
|
op_INPLACE_XOR = op_BINARY_XOR
|
|
|
|
def op_JUMP_ABSOLUTE (self, i, op, arg, *args, **kws):
|
|
return [self.builder.branch(self.llvm_blocks[arg])]
|
|
|
|
def op_JUMP_FORWARD (self, i, op, arg, *args, **kws):
|
|
return [self.builder.branch(self.llvm_blocks[i + arg + 3])]
|
|
|
|
def op_JUMP_IF_FALSE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_JUMP_IF_FALSE")
|
|
|
|
def op_JUMP_IF_FALSE_OR_POP (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_JUMP_IF_FALSE_OR_POP")
|
|
|
|
def op_JUMP_IF_TRUE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_JUMP_IF_TRUE")
|
|
|
|
def op_JUMP_IF_TRUE_OR_POP (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_JUMP_IF_TRUE_OR_POP")
|
|
|
|
def op_LOAD_ATTR (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_LOAD_ATTR")
|
|
|
|
def op_LOAD_CONST (self, i, op, arg, *args, **kws):
|
|
py_val = self.code_obj.co_consts[arg]
|
|
if isinstance(py_val, int):
|
|
ret_val = [lc.Constant.int(bytetype.lc_int, py_val)]
|
|
elif isinstance(py_val, float):
|
|
ret_val = [lc.Constant.double(py_val)]
|
|
elif py_val == None:
|
|
ret_val = [None]
|
|
else:
|
|
raise NotImplementedError('Constant converstion for %r' %
|
|
(py_val,))
|
|
return ret_val
|
|
|
|
def op_LOAD_DEREF (self, i, op, arg, *args, **kws):
|
|
name = self.code_obj.co_freevars[arg]
|
|
ret_val = self.globals[name]
|
|
if isinstance(ret_val, lc.Type) and not hasattr(ret_val, '__name__'):
|
|
ret_val.__name__ = name
|
|
return [ret_val]
|
|
|
|
def op_LOAD_GLOBAL (self, i, op, arg, *args, **kws):
|
|
name = self.code_obj.co_names[arg]
|
|
ret_val = self.globals[name]
|
|
if isinstance(ret_val, lc.Type) and not hasattr(ret_val, '__name__'):
|
|
ret_val.__name__ = name
|
|
return [ret_val]
|
|
|
|
def op_POP_BLOCK (self, i, op, arg, *args, **kws):
|
|
self.loop_stack.pop()
|
|
return [self.builder.branch(self.llvm_blocks[i + 1])]
|
|
|
|
def op_POP_JUMP_IF_FALSE (self, i, op, arg, *args, **kws):
|
|
return [self.builder.cbranch(args[0], self.llvm_blocks[i + 3],
|
|
self.llvm_blocks[arg])]
|
|
|
|
def op_POP_JUMP_IF_TRUE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_POP_JUMP_IF_TRUE")
|
|
|
|
def op_POP_TOP (self, i, op, arg, *args, **kws):
|
|
return args
|
|
|
|
def op_RETURN_VALUE (self, i, op, arg, *args, **kws):
|
|
if args[0] is None:
|
|
ret_val = [self.builder.ret_void()]
|
|
else:
|
|
ret_val = [self.builder.ret(args[0])]
|
|
return ret_val
|
|
|
|
def op_SETUP_LOOP (self, i, op, arg, *args, **kws):
|
|
self.loop_stack.append((i, arg))
|
|
return [self.builder.branch(self.llvm_blocks[i + 3])]
|
|
|
|
def op_SLICE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_SLICE")
|
|
|
|
def op_STORE_ATTR (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_STORE_ATTR")
|
|
|
|
def op_STORE_SLICE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_STORE_SLICE")
|
|
|
|
def op_STORE_SUBSCR (self, i, op, arg, *args, **kws):
|
|
store_val, arr_val, index_val = args
|
|
dest_addr = self.builder.gep(arr_val, [index_val])
|
|
return [self.builder.store(store_val, dest_addr)]
|
|
|
|
def op_UNARY_CONVERT (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_UNARY_CONVERT")
|
|
|
|
def op_UNARY_INVERT (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_UNARY_INVERT")
|
|
|
|
def op_UNARY_NEGATIVE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_UNARY_NEGATIVE")
|
|
|
|
def op_UNARY_NOT (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_UNARY_NOT")
|
|
|
|
def op_UNARY_POSITIVE (self, i, op, arg, *args, **kws):
|
|
raise NotImplementedError("LLVMTranslator.op_UNARY_POSITIVE")
|
|
|
|
# ______________________________________________________________________
|
|
|
|
def translate_function (func, lltype, llvm_module = None, **kws):
|
|
'''Given a function and an LLVM function type, emit LLVM code for
|
|
that function using a new LLVMTranslator instance.'''
|
|
translator = LLVMTranslator(llvm_module)
|
|
ret_val = translator.translate(func, lltype, env = kws)
|
|
return ret_val
|
|
|
|
# ______________________________________________________________________
|
|
|
|
def translate_into_function (py_function, llvm_function, **kws):
|
|
translator = LLVMTranslator(llvm_function.module)
|
|
ret_val = translator.translate(py_function, llvm_function = llvm_function,
|
|
env = kws)
|
|
return ret_val
|
|
|
|
# ______________________________________________________________________
|
|
|
|
def llpython (lltype, llvm_module = None, **kws):
|
|
'''Decorator version of translate_function().'''
|
|
def _llpython (func):
|
|
return translate_function(func, lltype, llvm_module, **kws)
|
|
return _llpython
|
|
|
|
# ______________________________________________________________________
|
|
|
|
def llpython_into (llvm_function, **kws):
|
|
def _llpython_into (func):
|
|
return translate_into_function(llvm_function, func, **kws)
|
|
return _llpython_into
|
|
|
|
# ______________________________________________________________________
|
|
# Main (self-test) routine
|
|
|
|
def main (*args):
|
|
from tests import llfuncs, llfunctys
|
|
if not args:
|
|
args = ('doslice',)
|
|
elif 'all' in args:
|
|
args = [llfunc
|
|
for llfunc in dir(llfuncs) if not llfunc.startswith('_')]
|
|
llvm_module = lc.Module.new('test_module')
|
|
for arg in args:
|
|
translate_function(getattr(llfuncs, arg), getattr(llfunctys, arg),
|
|
llvm_module)
|
|
print(llvm_module)
|
|
|
|
# ______________________________________________________________________
|
|
|
|
if __name__ == '__main__':
|
|
import sys
|
|
main(*sys.argv[1:])
|
|
|
|
# ______________________________________________________________________
|
|
# End of byte_translator.py
|