403 lines
23 KiB
Python
403 lines
23 KiB
Python
from __future__ import annotations
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from lib.core.translator import Translator
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from lib.core.Handles.HandlesBase import BaseHandle
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import ast
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import llvmlite.ir as ir
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class ExprOpsHandle(BaseHandle):
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def _HandleBinOpLlvm(self, Node, VarType=None):
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Gen = self.Trans.LlvmGen
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Gen._set_node_info(Node, "BinOp")
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LeftVal = self.HandleExprLlvm(Node.left, VarType)
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if not LeftVal:
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return None
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RightVal = self.HandleExprLlvm(Node.right, VarType)
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if not RightVal:
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return None
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Op = self.Trans.ExprHandler.GetOpSymbol(Node.op)
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if not Op:
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return None
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OP_OVERLOAD_MAP = {
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'+': '__add__', '-': '__sub__', '*': '__mul__',
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'/': '__truediv__', '//': '__floordiv__', '%': '__mod__',
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'**': '__pow__',
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}
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if Op in OP_OVERLOAD_MAP:
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LeftClassName = None
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if isinstance(LeftVal.type, ir.PointerType):
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pointee = LeftVal.type.pointee
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if isinstance(pointee, (ir.IdentifiedStructType, ir.LiteralStructType)):
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for CN, ST in Gen.structs.items():
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if pointee == ST:
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LeftClassName = CN
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break
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elif isinstance(pointee, ir.IntType) and pointee.width == 8:
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LeftClassName = self.Trans.ExprUtils._get_var_class(Node.left, Gen)
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if LeftClassName and LeftClassName in Gen.structs:
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TargetStructPtr = ir.PointerType(Gen.structs[LeftClassName])
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LeftVal = Gen.builder.bitcast(LeftVal, TargetStructPtr, name=f"bitcast_to_{LeftClassName}")
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if LeftClassName is None and isinstance(Node.left, ast.Name):
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LeftClassName = Gen.var_struct_class.get(Node.left.id)
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if LeftClassName and LeftClassName in Gen.structs:
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if isinstance(LeftVal.type, ir.PointerType) and isinstance(LeftVal.type.pointee, ir.IntType) and LeftVal.type.pointee.width == 8:
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TargetStructPtr = ir.PointerType(Gen.structs[LeftClassName])
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LeftVal = Gen.builder.bitcast(LeftVal, TargetStructPtr, name=f"bitcast_to_{LeftClassName}")
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if LeftClassName:
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op_name = OP_OVERLOAD_MAP[Op]
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result = self.Trans.ExprUtils._try_operator_overload(LeftClassName, op_name, LeftVal, Gen, RightVal)
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if result is not None:
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return result
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if Op in ('+', 'Add') and isinstance(LeftVal.type, ir.PointerType) and isinstance(RightVal.type, ir.IntType):
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if isinstance(LeftVal.type.pointee, ir.IntType) and LeftVal.type.pointee.width == 8:
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if isinstance(Node.left, ast.Constant) and isinstance(Node.left.value, str) and len(Node.left.value) == 1:
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CharVal = Gen._load(LeftVal, name="load_char_const")
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CharAsInt = Gen.builder.zext(CharVal, RightVal.type, name="char_to_int")
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result = Gen.builder.add(CharAsInt, RightVal, name="char_add")
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TruncResult = Gen.builder.trunc(result, ir.IntType(8), name="add_to_char")
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return TruncResult
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is_unsigned = Gen._check_node_unsigned(Node.left) or Gen._check_node_unsigned(Node.right)
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if isinstance(LeftVal.type, ir.IntType) and isinstance(RightVal.type, ir.IntType):
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if LeftVal.type.width < RightVal.type.width:
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need_zext = is_unsigned or Gen._check_node_unsigned(Node.left) or LeftVal.type.width == 8
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if not need_zext and isinstance(RightVal, ir.Constant):
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signed_max = (1 << (LeftVal.type.width - 1)) - 1
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try:
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if RightVal.constant > signed_max:
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need_zext = True
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except (TypeError, ValueError):
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pass
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if need_zext:
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LeftVal = Gen.builder.zext(LeftVal, RightVal.type, name="zext_left")
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else:
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LeftVal = Gen.builder.sext(LeftVal, RightVal.type, name="sext_left")
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elif LeftVal.type.width > RightVal.type.width:
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need_zext = is_unsigned or Gen._check_node_unsigned(Node.right) or RightVal.type.width == 8
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if not need_zext and isinstance(LeftVal, ir.Constant):
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signed_max = (1 << (RightVal.type.width - 1)) - 1
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try:
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if LeftVal.constant > signed_max:
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need_zext = True
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except (TypeError, ValueError):
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pass
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if need_zext:
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RightVal = Gen.builder.zext(RightVal, LeftVal.type, name="zext_right")
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else:
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RightVal = Gen.builder.sext(RightVal, LeftVal.type, name="zext_right")
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elif isinstance(LeftVal.type, ir.PointerType) and isinstance(RightVal.type, ir.IntType):
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if Op not in ('+', '-', 'Add', 'Sub') and isinstance(LeftVal.type.pointee, ir.IntType):
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LeftVal = Gen._load(LeftVal, name="deref_ptr_binop")
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if LeftVal.type.width < RightVal.type.width:
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LeftVal = Gen.builder.zext(LeftVal, RightVal.type, name="zext_deref_left")
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elif LeftVal.type.width > RightVal.type.width:
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RightVal = Gen.builder.zext(RightVal, LeftVal.type, name="zext_right_deref")
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elif isinstance(RightVal.type, ir.PointerType) and isinstance(LeftVal.type, ir.IntType):
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if Op not in ('+', '-', 'Add', 'Sub') and isinstance(RightVal.type.pointee, ir.IntType):
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RightVal = Gen._load(RightVal, name="deref_ptr_binop_r")
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if RightVal.type.width < LeftVal.type.width:
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RightVal = Gen.builder.zext(RightVal, LeftVal.type, name="zext_deref_right")
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elif RightVal.type.width > LeftVal.type.width:
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LeftVal = Gen.builder.zext(LeftVal, RightVal.type, name="zext_left_deref")
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if Op in ('>>', 'RShift') and isinstance(Node.left, ast.Name):
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vname = Node.left.id
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if vname in Gen.var_signedness and Gen.var_signedness[vname]:
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is_unsigned = True
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result = Gen.emit_binary_op(Op, LeftVal, RightVal, is_unsigned=is_unsigned)
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return result
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def _HandleBoolOpLlvm(self, Node):
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Gen = self.Trans.LlvmGen
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def _to_bool(val, name):
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if isinstance(val.type, (ir.FloatType, ir.DoubleType)):
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return Gen.builder.fcmp_ordered('!=', val, ir.Constant(val.type, 0.0), name=name)
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if not isinstance(val.type, ir.IntType) or val.type.width != 1:
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return Gen.builder.icmp_signed('!=', val, Gen._zero_const(val.type), name=name)
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return val
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values = Node.values
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if len(values) < 2:
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return self.HandleExprLlvm(values[0]) if values else None
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if isinstance(Node.op, ast.And):
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phi_incomings = []
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end_bb = Gen.func.append_basic_block(name="and.end")
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for idx in range(len(values) - 1):
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val = self.HandleExprLlvm(values[idx])
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if not val:
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if not end_bb.is_terminated:
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saved_block = Gen.builder.block
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Gen.builder.position_at_start(end_bb)
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Gen.builder.unreachable()
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Gen.builder.position_at_end(saved_block)
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return None
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if not isinstance(val.type, ir.IntType) or val.type.width != 1:
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val = _to_bool(val, f"andcond{idx}")
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cur_bb = Gen.builder.block
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next_bb = Gen.func.append_basic_block(name=f"and.rhs{idx}")
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Gen.builder.cbranch(val, next_bb, end_bb)
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phi_incomings.append((ir.Constant(ir.IntType(1), 0), cur_bb))
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Gen.builder.position_at_start(next_bb)
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last_val = self.HandleExprLlvm(values[-1])
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if not last_val:
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last_val = ir.Constant(ir.IntType(1), 0)
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if not isinstance(last_val.type, ir.IntType) or last_val.type.width != 1:
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last_val = _to_bool(last_val, "andcond_last")
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last_bb = Gen.builder.block
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Gen.builder.branch(end_bb)
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Gen.builder.position_at_start(end_bb)
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result_phi = Gen.builder.phi(ir.IntType(1), name="and.result")
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for const_val, bb in phi_incomings:
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result_phi.add_incoming(const_val, bb)
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result_phi.add_incoming(last_val, last_bb)
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return result_phi
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elif isinstance(Node.op, ast.Or):
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phi_incomings = []
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end_bb = Gen.func.append_basic_block(name="or.end")
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for idx in range(len(values) - 1):
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val = self.HandleExprLlvm(values[idx])
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if not val:
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if not end_bb.is_terminated:
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saved_block = Gen.builder.block
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Gen.builder.position_at_start(end_bb)
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Gen.builder.unreachable()
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Gen.builder.position_at_end(saved_block)
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return None
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if not isinstance(val.type, ir.IntType) or val.type.width != 1:
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val = _to_bool(val, f"orcond{idx}")
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cur_bb = Gen.builder.block
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next_bb = Gen.func.append_basic_block(name=f"or.rhs{idx}")
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Gen.builder.cbranch(val, end_bb, next_bb)
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phi_incomings.append((ir.Constant(ir.IntType(1), 1), cur_bb))
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Gen.builder.position_at_start(next_bb)
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last_val = self.HandleExprLlvm(values[-1])
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if not last_val:
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last_val = ir.Constant(ir.IntType(1), 1)
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if not isinstance(last_val.type, ir.IntType) or last_val.type.width != 1:
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last_val = _to_bool(last_val, "orcond_last")
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last_bb = Gen.builder.block
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Gen.builder.branch(end_bb)
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Gen.builder.position_at_start(end_bb)
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result_phi = Gen.builder.phi(ir.IntType(1), name="or.result")
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for const_val, bb in phi_incomings:
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result_phi.add_incoming(const_val, bb)
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result_phi.add_incoming(last_val, last_bb)
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return result_phi
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return None
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def _HandleUnaryOpLlvm(self, Node):
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Gen = self.Trans.LlvmGen
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OperandVal = self.HandleExprLlvm(Node.operand)
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if not OperandVal:
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return None
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OpSymbol = self.Trans.ExprHandler.GetUnaryOpSymbol(Node.op)
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if not OpSymbol:
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return None
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UNARY_OVERLOAD_MAP = {
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'-': '__neg__',
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'+': '__pos__',
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'~': '__invert__',
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}
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if OpSymbol in UNARY_OVERLOAD_MAP:
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ClassName = None
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if isinstance(OperandVal.type, ir.PointerType):
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pointee = OperandVal.type.pointee
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if isinstance(pointee, (ir.IdentifiedStructType, ir.LiteralStructType)):
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for CN, ST in Gen.structs.items():
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if pointee == ST:
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ClassName = CN
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break
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elif isinstance(pointee, ir.IntType) and pointee.width == 8:
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ClassName = self.Trans.ExprUtils._get_var_class(Node.operand, Gen)
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if ClassName and ClassName in Gen.structs:
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TargetStructPtr = ir.PointerType(Gen.structs[ClassName])
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OperandVal = Gen.builder.bitcast(OperandVal, TargetStructPtr, name=f"bitcast_to_{ClassName}")
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if ClassName is None and isinstance(Node.operand, ast.Name):
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ClassName = Gen.var_struct_class.get(Node.operand.id)
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if ClassName and ClassName in Gen.structs:
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if isinstance(OperandVal.type, ir.PointerType) and isinstance(OperandVal.type.pointee, ir.IntType) and OperandVal.type.pointee.width == 8:
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TargetStructPtr = ir.PointerType(Gen.structs[ClassName])
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OperandVal = Gen.builder.bitcast(OperandVal, TargetStructPtr, name=f"bitcast_to_{ClassName}")
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if ClassName:
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op_name = UNARY_OVERLOAD_MAP[OpSymbol]
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result = self.Trans.ExprUtils._try_operator_overload(ClassName, op_name, OperandVal, Gen)
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if result is not None:
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return result
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if OpSymbol == 'not':
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if isinstance(OperandVal.type, ir.IntType) and OperandVal.type.width == 1:
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return Gen.builder.not_(OperandVal, name="not_result")
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if isinstance(OperandVal.type, ir.PointerType):
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null_val = ir.Constant(OperandVal.type, None)
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return Gen.builder.icmp_signed('==', OperandVal, null_val, name="not_result")
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zero = ir.Constant(OperandVal.type, 0)
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return Gen.builder.icmp_signed('==', OperandVal, zero, name="not_result")
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elif OpSymbol == '~':
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if isinstance(OperandVal.type, ir.IntType):
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mask = (1 << OperandVal.type.width) - 1
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return Gen.builder.xor(OperandVal, ir.Constant(OperandVal.type, mask), name="bnot_result")
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return Gen.builder.xor(OperandVal, ir.Constant(OperandVal.type, -1), name="bnot_result")
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elif OpSymbol == '+':
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return OperandVal
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elif OpSymbol == '-':
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if isinstance(OperandVal.type, ir.IntType):
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return Gen.builder.neg(OperandVal, name="neg_result")
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elif isinstance(OperandVal.type, (ir.FloatType, ir.DoubleType)):
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return Gen.builder.fneg(OperandVal, name="fneg_result")
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return None
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def _HandleCompareLlvm(self, Node):
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Gen = self.Trans.LlvmGen
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LeftVal = self.HandleExprLlvm(Node.left)
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if not LeftVal:
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return None
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is_unsigned = Gen._check_node_unsigned(Node.left) or (Gen._check_node_unsigned(Node.comparators[0]) if Node.comparators else False)
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if len(Node.ops) == 1:
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Op = Node.ops[0]
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ComparatorSymbol = self.Trans.ExprHandler.GetComparatorSymbol(Op)
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if not ComparatorSymbol:
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return None
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RightVal = self.HandleExprLlvm(Node.comparators[0])
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if not RightVal:
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return None
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if isinstance(LeftVal, ir.Constant) and isinstance(RightVal, ir.Constant):
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if isinstance(LeftVal.type, ir.IntType) and isinstance(RightVal.type, ir.IntType):
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lv, rv = LeftVal.constant, RightVal.constant
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lw, rw = LeftVal.type.width, RightVal.type.width
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if lw < rw:
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lv = lv if lv >= 0 else lv + (1 << lw)
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elif rw < lw:
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rv = rv if rv >= 0 else rv + (1 << rw)
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if is_unsigned:
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mask_l = (1 << max(lw, rw)) - 1
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lv = lv & mask_l
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rv = rv & mask_l
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cmp_map = {
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'==': lv == rv, '!=': lv != rv,
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'<': lv < rv, '>': lv > rv,
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'<=': lv <= rv, '>=': lv >= rv,
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}
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result = cmp_map.get(ComparatorSymbol, False)
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return ir.Constant(ir.IntType(1), 1 if result else 0)
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if isinstance(LeftVal.type, ir.IntType) and isinstance(RightVal.type, ir.IntType):
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if LeftVal.type.width < RightVal.type.width:
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# 如果宽类型常量值超出窄类型有符号范围，则必须用zext
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# i8 类型默认使用 zext（系统编程中 i8 几乎总是无符号字节）
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need_zext = is_unsigned or Gen._check_node_unsigned(Node.left) or LeftVal.type.width == 8
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if not need_zext and isinstance(RightVal, ir.Constant):
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signed_max = (1 << (LeftVal.type.width - 1)) - 1
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try:
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if RightVal.constant > signed_max or RightVal.constant < 0:
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need_zext = True
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except (TypeError, ValueError):
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pass
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if need_zext:
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LeftVal = Gen.builder.zext(LeftVal, RightVal.type, name="zext_left_cmp")
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else:
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LeftVal = Gen.builder.sext(LeftVal, RightVal.type, name="sext_left_cmp")
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elif LeftVal.type.width > RightVal.type.width:
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need_zext = is_unsigned or Gen._check_node_unsigned(Node.comparators[0]) or RightVal.type.width == 8
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if not need_zext and isinstance(LeftVal, ir.Constant):
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signed_max = (1 << (RightVal.type.width - 1)) - 1
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try:
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if LeftVal.constant > signed_max or LeftVal.constant < 0:
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need_zext = True
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except (TypeError, ValueError):
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pass
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if need_zext:
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RightVal = Gen.builder.zext(RightVal, LeftVal.type, name="zext_right_cmp")
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else:
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RightVal = Gen.builder.sext(RightVal, LeftVal.type, name="sext_right_cmp")
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elif isinstance(LeftVal.type, ir.PointerType) and isinstance(RightVal.type, ir.IntType):
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if isinstance(LeftVal.type.pointee, ir.IntType) and LeftVal.type.pointee.width == 8 and isinstance(RightVal.type, ir.IntType) and RightVal.type.width == 8:
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LeftVal = Gen._load(LeftVal, name="load_char_ptr_cmp")
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else:
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if isinstance(RightVal, ir.Constant) and RightVal.constant == 0:
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RightVal = ir.Constant(LeftVal.type, None)
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else:
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RightVal = Gen.builder.inttoptr(RightVal, LeftVal.type, name="int2ptr_cmp")
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elif isinstance(RightVal.type, ir.PointerType) and isinstance(LeftVal.type, ir.IntType):
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if isinstance(RightVal.type.pointee, ir.IntType) and RightVal.type.pointee.width == 8 and isinstance(LeftVal.type, ir.IntType) and LeftVal.type.width == 8:
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RightVal = Gen._load(RightVal, name="load_char_ptr_cmp")
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else:
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if isinstance(LeftVal, ir.Constant) and LeftVal.constant == 0:
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LeftVal = ir.Constant(RightVal.type, None)
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else:
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LeftVal = Gen.builder.inttoptr(LeftVal, RightVal.type, name="int2ptr_cmp")
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if isinstance(LeftVal.type, ir.PointerType) and isinstance(RightVal.type, ir.PointerType):
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result = Gen.builder.icmp_unsigned(ComparatorSymbol, LeftVal, RightVal, name="cmpresult")
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elif isinstance(LeftVal.type, (ir.FloatType, ir.DoubleType)) or isinstance(RightVal.type, (ir.FloatType, ir.DoubleType)):
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if isinstance(LeftVal.type, (ir.FloatType, ir.DoubleType)) and isinstance(RightVal.type, ir.IntType):
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RightVal = Gen.builder.sitofp(RightVal, LeftVal.type, name="int_to_float_cmp")
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elif isinstance(RightVal.type, (ir.FloatType, ir.DoubleType)) and isinstance(LeftVal.type, ir.IntType):
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LeftVal = Gen.builder.sitofp(LeftVal, RightVal.type, name="int_to_float_cmp")
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result = Gen.builder.fcmp_unordered(ComparatorSymbol, LeftVal, RightVal, name="cmpresult")
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elif is_unsigned:
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result = Gen.builder.icmp_unsigned(ComparatorSymbol, LeftVal, RightVal, name="cmpresult")
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else:
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result = Gen.builder.icmp_signed(ComparatorSymbol, LeftVal, RightVal, name="cmpresult")
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return result
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EndBB = Gen.func.append_basic_block(name="cmp.end")
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result_val = None
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PrevBB = Gen.builder.block
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for i, (Op, Comparator) in enumerate(zip(Node.ops, Node.comparators)):
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ComparatorSymbol = self.Trans.ExprHandler.GetComparatorSymbol(Op)
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if not ComparatorSymbol:
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continue
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RightVal = self.HandleExprLlvm(Comparator)
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if not RightVal:
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continue
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NextBB = Gen.func.append_basic_block(name="cmp.next")
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if isinstance(LeftVal.type, ir.IntType) and isinstance(RightVal.type, ir.IntType):
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if LeftVal.type.width < RightVal.type.width:
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need_zext = is_unsigned or Gen._check_node_unsigned(Node.left) or LeftVal.type.width == 8
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if not need_zext and isinstance(RightVal, ir.Constant):
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signed_max = (1 << (LeftVal.type.width - 1)) - 1
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try:
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if RightVal.constant > signed_max or RightVal.constant < 0:
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need_zext = True
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except (TypeError, ValueError):
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pass
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if need_zext:
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LeftVal = Gen.builder.zext(LeftVal, RightVal.type, name=f"zext_left_{i}")
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else:
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LeftVal = Gen.builder.sext(LeftVal, RightVal.type, name=f"sext_left_{i}")
|
||
elif LeftVal.type.width > RightVal.type.width:
|
||
need_zext = is_unsigned or Gen._check_node_unsigned(Comparator) or RightVal.type.width == 8
|
||
if not need_zext and isinstance(LeftVal, ir.Constant):
|
||
signed_max = (1 << (RightVal.type.width - 1)) - 1
|
||
try:
|
||
if LeftVal.constant > signed_max or LeftVal.constant < 0:
|
||
need_zext = True
|
||
except (TypeError, ValueError):
|
||
pass
|
||
if need_zext:
|
||
RightVal = Gen.builder.zext(RightVal, LeftVal.type, name=f"zext_right_{i}")
|
||
else:
|
||
RightVal = Gen.builder.sext(RightVal, LeftVal.type, name=f"sext_right_{i}")
|
||
if is_unsigned:
|
||
cmp_result = Gen.builder.icmp_unsigned(ComparatorSymbol, LeftVal, RightVal, name=f"cmp_{i}")
|
||
elif isinstance(LeftVal.type, (ir.FloatType, ir.DoubleType)) or isinstance(RightVal.type, (ir.FloatType, ir.DoubleType)):
|
||
if isinstance(LeftVal.type, (ir.FloatType, ir.DoubleType)) and isinstance(RightVal.type, ir.IntType):
|
||
RightVal = Gen.builder.sitofp(RightVal, LeftVal.type, name=f"int_to_float_cmp_{i}")
|
||
elif isinstance(RightVal.type, (ir.FloatType, ir.DoubleType)) and isinstance(LeftVal.type, ir.IntType):
|
||
LeftVal = Gen.builder.sitofp(LeftVal, RightVal.type, name=f"int_to_float_cmp_{i}")
|
||
cmp_result = Gen.builder.fcmp_unordered(ComparatorSymbol, LeftVal, RightVal, name=f"cmp_{i}")
|
||
else:
|
||
cmp_result = Gen.builder.icmp_signed(ComparatorSymbol, LeftVal, RightVal, name=f"cmp_{i}")
|
||
if result_val is None:
|
||
result_val = cmp_result
|
||
else:
|
||
result_val = Gen.builder.and_(result_val, cmp_result, name=f"and_cmp_{i}")
|
||
Gen.builder.cbranch(cmp_result, NextBB, EndBB)
|
||
Gen.builder.position_at_start(NextBB)
|
||
LeftVal = RightVal
|
||
Gen.builder.branch(EndBB)
|
||
Gen.builder.position_at_start(EndBB)
|
||
final_result = Gen.builder.phi(ir.IntType(1), name="final_cmp")
|
||
final_result.add_incoming(ir.Constant(ir.IntType(1), 0), PrevBB)
|
||
for i in range(len(Node.ops)):
|
||
bb = Gen.func.append_basic_block(name=f"cmp.end.{i}")
|
||
final_result.add_incoming(ir.Constant(ir.IntType(1), 1), bb)
|
||
return final_result
|