204 lines
9.1 KiB
Python
204 lines
9.1 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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import ast
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import llvmlite.ir as ir
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from lib.core.Handles.HandlesBase import BaseHandle
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from lib.core.ConstEvaluator import ConstEvaluator, EvalContext
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class IfHandle(BaseHandle):
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def _get_attr_full_name(self, node: ast.expr) -> str | None:
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if isinstance(node, ast.Attribute):
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parts: list[str] = []
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cur: ast.expr = node
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while isinstance(cur, ast.Attribute):
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parts.append(cur.attr)
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cur = cur.value
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if isinstance(cur, ast.Name):
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parts.append(cur.id)
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parts.reverse()
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return '.'.join(parts)
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return None
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def _is_cif_call(self, node: ast.expr) -> bool:
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if isinstance(node, ast.Call):
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if isinstance(node.func, ast.Attribute):
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if isinstance(node.func.value, ast.Name) and node.func.value.id == 'c':
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return node.func.attr in ('CIf', 'CIfdef', 'CIfndef')
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if isinstance(node.func, ast.Name):
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return node.func.id in ('CIf', 'CIfdef', 'CIfndef')
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return False
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def _resolve_macro_name(self, arg: ast.expr) -> str | None:
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if isinstance(arg, ast.Name):
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return arg.id
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if isinstance(arg, ast.Constant) and isinstance(arg.value, str):
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return arg.value
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if isinstance(arg, ast.Attribute):
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full_name: str | None = self._get_attr_full_name(arg)
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if full_name:
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return full_name
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return None
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def _evaluate_cif_condition(self, node: ast.Call) -> int | None:
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if not isinstance(node, ast.Call):
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return None
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args: list[ast.expr] = node.args
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if not args:
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return 0
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kind: str | None = None
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if isinstance(node.func, ast.Attribute):
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kind = node.func.attr
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elif isinstance(node.func, ast.Name):
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kind = node.func.id
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else:
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return None
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if kind == 'CIfdef':
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name: str | None = self._resolve_macro_name(args[0])
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if name is None:
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return 0
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return 1 if self._is_macro_defined(name) else 0
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elif kind == 'CIfndef':
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name: str | None = self._resolve_macro_name(args[0])
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if name is None:
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return 1
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return 0 if self._is_macro_defined(name) else 1
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elif kind == 'CIf':
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return self._eval_const_expr(args[0])
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return None
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def _is_macro_defined(self, name: str) -> bool:
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Gen: "Translator.LlvmGen" = self.Trans.LlvmGen
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if hasattr(Gen, '_define_constants') and name in Gen._define_constants:
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return True
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if self.Trans.SymbolTable.is_define(name):
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return True
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platform_macros: dict[str, int] = self._get_platform_macros()
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return name in platform_macros
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def _get_macro_value(self, name: str) -> int | float | None:
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Gen: "Translator.LlvmGen" = self.Trans.LlvmGen
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if hasattr(Gen, '_define_constants') and name in Gen._define_constants:
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val: int | float | None = Gen._define_constants[name]
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if isinstance(val, (int, float)):
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return val
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info: "SymbolTable.SymbolInfo" = self.Trans.SymbolTable.lookup(name)
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if info:
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if info.IsDefine:
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val: int | float | None = info.DefineValue
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if isinstance(val, (int, float)):
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return val
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platform_macros: dict[str, int] = self._get_platform_macros()
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if name in platform_macros:
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return platform_macros[name]
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return None
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def _get_platform_macros(self) -> dict[str, int]:
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Gen: "Translator.LlvmGen" = self.Trans.LlvmGen
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macros: dict[str, int] = {}
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pi: dict[str, object] = Gen._platform_info
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ptr_size: int = getattr(Gen, 'ptr_size', 8)
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# 根据目标平台设置宏（从三元组推导）
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if pi.get('is_windows'):
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macros['_WIN32'] = 1
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if not pi.get('is_32bit'):
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macros['_WIN64'] = 1
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macros['WIN64'] = 1
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macros['WIN32'] = 1
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if pi.get('is_linux'):
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macros['__linux__'] = 1
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if pi.get('is_macos'):
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macros['__APPLE__'] = 1
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macros['__MACH__'] = 1
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if pi.get('is_x86_64'):
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macros['__x86_64__'] = 1
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macros['__x86_64'] = 1
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macros['_M_X64'] = 1
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elif pi.get('is_arm64'):
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macros['__aarch64__'] = 1
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macros['_M_ARM64'] = 1
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if not pi.get('is_32bit') and pi.get('is_linux'):
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macros['__LP64__'] = 1
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elif pi.get('is_32bit'):
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macros['_ILP32'] = 1
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macros['SIZEOF_VOID_P'] = ptr_size
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macros['__SIZEOF_POINTER__'] = ptr_size
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macros['NDEBUG'] = 0
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return macros
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def _eval_const_expr(self, node: ast.expr) -> int | None:
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Gen: "Translator.LlvmGen" = self.Trans.LlvmGen
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ctx: EvalContext = EvalContext(Gen=Gen, symtab=self.Trans.SymbolTable, translator=self.Trans)
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result: int | float | bool | None = ConstEvaluator.eval_full(node, ctx)
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if result is None:
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# 保留 CIf 嵌套调用处理（HandlesIf 特有逻辑）
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if isinstance(node, ast.Call) and self._is_cif_call(node):
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return self._evaluate_cif_condition(node)
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return None
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# HandlesIf 需要 bool/float → int 转换（#if 条件编译语义）
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if isinstance(result, bool):
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return 1 if result else 0
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if isinstance(result, float):
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return 1 if result != 0.0 else 0
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return result
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def _HandleIfLlvm(self, Node: ast.If) -> None:
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Gen: "Translator.LlvmGen" = self.Trans.LlvmGen
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if self._is_cif_call(Node.test):
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compile_time_val: int | None = self._evaluate_cif_condition(Node.test)
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if compile_time_val is not None:
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if compile_time_val:
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self.Trans.BodyHandler.HandleBodyLlvm(Node.body)
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elif Node.orelse:
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if isinstance(Node.orelse, list) and len(Node.orelse) == 1 and isinstance(Node.orelse[0], ast.If):
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self._HandleIfLlvm(Node.orelse[0])
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else:
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self.Trans.BodyHandler.HandleBodyLlvm(Node.orelse)
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return
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Cond: ir.Value | None = self.Trans.ExprHandler.HandleExprLlvm(Node.test)
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if not Cond:
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return
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is_const: bool = isinstance(Cond, ir.Constant) and isinstance(Cond.type, ir.IntType) and Cond.type.width == 1
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if is_const:
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if Cond.constant:
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self.Trans.BodyHandler.HandleBodyLlvm(Node.body)
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elif Node.orelse:
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if isinstance(Node.orelse, list) and len(Node.orelse) == 1 and isinstance(Node.orelse[0], ast.If):
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self._HandleIfLlvm(Node.orelse[0])
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else:
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self.Trans.BodyHandler.HandleBodyLlvm(Node.orelse)
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return
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if not isinstance(Cond.type, ir.IntType) or Cond.type.width != 1:
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ClassName: str | None = self.Trans.ExprHandler._get_var_class(Node.test, Gen)
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if ClassName and Gen._has_function(f'{ClassName}.__bool__'):
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obj_val: ir.Value = Cond
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if isinstance(obj_val.type, ir.PointerType) and isinstance(obj_val.type.pointee, ir.IntType) and obj_val.type.pointee.width == 8:
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obj_val = Gen.builder.bitcast(obj_val, ir.PointerType(Gen.structs[ClassName]), name=f"cast_{ClassName}")
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Cond = Gen.builder.call(Gen._get_function(f'{ClassName}.__bool__'), [obj_val], name=f"call_{ClassName}.__bool__")
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if isinstance(Cond.type, ir.IntType) and Cond.type.width != 1:
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Cond = Gen.builder.icmp_signed('!=', Cond, Gen._ZeroConst(Cond.type), name="bool_result")
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else:
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if isinstance(Cond.type, (ir.FloatType, ir.DoubleType)):
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Cond = Gen.builder.fcmp_ordered('!=', Cond, ir.Constant(Cond.type, 0.0), name="ifcond")
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else:
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Cond = Gen.builder.icmp_signed('!=', Cond, Gen._ZeroConst(Cond.type), name="ifcond")
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ThenBB: ir.Block = Gen.func.append_basic_block(name="then")
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ElseBB: ir.Block | None = Gen.func.append_basic_block(name="else") if Node.orelse else None
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MergeBB: ir.Block = Gen.func.append_basic_block(name="endif")
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if not Gen.builder.block.is_terminated:
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Gen.builder.cbranch(Cond, ThenBB, ElseBB if ElseBB else MergeBB)
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Gen.builder.position_at_start(ThenBB)
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self.Trans.BodyHandler.HandleBodyLlvm(Node.body)
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if not Gen.builder.block.is_terminated:
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Gen.builder.branch(MergeBB)
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if ElseBB:
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Gen.builder.position_at_start(ElseBB)
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self.Trans.BodyHandler.HandleBodyLlvm(Node.orelse)
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if not Gen.builder.block.is_terminated:
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Gen.builder.branch(MergeBB)
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if not MergeBB.is_terminated:
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Gen.builder.position_at_start(MergeBB)
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else:
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Gen.builder.position_at_end(MergeBB) |