475 lines
17 KiB
Python
475 lines
17 KiB
Python
import t, c
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from stdint import *
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import string
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import viperlib
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import memhub
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import stdio
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from linkedlist import GSListNode, GSList
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from .__types import LLVMType, ParamNode, TypePrint
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# ============================================================
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# Line: 指令文本行
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#
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# 每条 LLVM IR 指令序列化为一行文本，通过链表组织。
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# 继承 GSListNode[Line] 获取强类型 Next: Line|CPtr
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#
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# 注意: 必须加 @t.NoVTable。否则 TransPyC 为子类添加 vtable 指针(T*)，
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# 但完全丢失父类 GSListNode[T] 的 Next 字段，导致 struct 布局错位，
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# 所有字段访问读取垃圾值（见续 XV 会话根因分析）。
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# ============================================================
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@t.NoVTable
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class Line(GSListNode[Line]):
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Buf: t.CChar | t.CPtr # 行文本（NUL 结尾）
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Len: t.CSizeT # 文本长度（不含 NUL）
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# ============================================================
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# BasicBlock: 基本块
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#
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# 持有名称 + 指令行链表 + 终止指令标志。
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# 继承 GSListNode[BasicBlock] 获取强类型 Next: BasicBlock|CPtr
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# Lines 为 GSList[Line] 指针，提供 O(1) 追加。
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#
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# 注意: 必须加 @t.NoVTable（理由同 Line）。
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# ============================================================
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@t.NoVTable
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class BasicBlock(GSListNode[BasicBlock]):
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Name: t.CChar | t.CPtr # 块名（如 "entry"/"if.then"）
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Lines: GSList[Line] | t.CPtr # 指令行链表容器（Head/Tail/Count）
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IsTerminated: t.CInt # 1=已有终止指令（br/ret）
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# ============================================================
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# Param: 函数参数
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#
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# 继承 GSListNode[Param] 获取强类型 Next: Param|CPtr
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# Attrs 存储参数属性文本（如 "noundef"/"nocapture"/"readonly"），None=无属性
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#
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# 注意: 必须加 @t.NoVTable（理由同 Line）。
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# ============================================================
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@t.NoVTable
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class Param(GSListNode[Param]):
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Ty: LLVMType | t.CPtr # 参数类型
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Name: t.CChar | t.CPtr # 参数名（如 "%0"/"%a"）
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Attrs: t.CChar | t.CPtr # 参数属性文本（None=无属性）
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# ============================================================
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# Function: 函数
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#
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# 持有名称 + 返回类型 + 参数链表 + 基本块链表。
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# 继承 GSListNode[Function] 获取强类型 Next: Function|CPtr
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# Params/Blocks 为 GSList 指针，提供 O(1) 追加。
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# Attrs 存储函数级属性文本（如 "nounwind"/"noinline"），None=无属性
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#
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# 注意: 必须加 @t.NoVTable（理由同 Line）。
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# ============================================================
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@t.NoVTable
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class Function(GSListNode[Function]):
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Name: t.CChar | t.CPtr # 函数名
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RetTy: LLVMType | t.CPtr # 返回类型
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Params: GSList[Param] | t.CPtr # 参数链表容器
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Blocks: GSList[BasicBlock] | t.CPtr # 基本块链表容器
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IsDeclared: t.CInt # 1=仅声明(declare), 0=定义(define)
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IsVarArg: t.CInt # 1=变参函数(...)
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Attrs: t.CChar | t.CPtr # 函数属性文本（None=无属性）
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# ============================================================
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# 工厂函数
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# ============================================================
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# Line 硬编码大小: Next(8) + Buf(8) + Len(8) = 24 字节
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LINE_SIZE: t.CDefine = 24
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def new_line(pool: memhub.MemBuddy | t.CPtr, text: t.CChar | t.CPtr) -> Line | t.CPtr:
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"""创建一个指令行，复制 text 到新分配的缓冲区"""
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ptr: Line | t.CPtr = pool.alloc(LINE_SIZE)
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if ptr is None: return None
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string.memset(ptr, 0, LINE_SIZE)
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if text is not None:
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slen: t.CSizeT = string.strlen(text)
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buf: t.CChar | t.CPtr = pool.alloc(slen + 1)
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if buf is not None:
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string.strcpy(buf, text)
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ptr.Buf = buf
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ptr.Len = slen
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return ptr
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def _new_gslist(pool: memhub.MemBuddy | t.CPtr, list_size: t.CSizeT) -> t.CPtr:
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"""从 pool 分配并零初始化一个 GSList 容器（Head/Tail/Count 全零）"""
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gsl: t.CPtr = pool.alloc(list_size)
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if gsl is None: return None
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string.memset(gsl, 0, list_size)
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return gsl
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# BasicBlock 硬编码大小: Next(8) + Name(8) + Lines(8) + IsTerminated(4) = 32 字节
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BLOCK_SIZE: t.CDefine = 32
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def new_basic_block(pool: memhub.MemBuddy | t.CPtr, name: t.CChar | t.CPtr) -> BasicBlock | t.CPtr:
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"""创建一个基本块"""
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ptr: BasicBlock | t.CPtr = pool.alloc(BLOCK_SIZE)
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if ptr is None: return None
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string.memset(ptr, 0, BLOCK_SIZE)
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ptr.Name = name
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ptr.Lines = _new_gslist(pool, 24) # GSList: Head+Tail+Count
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ptr.IsTerminated = 0
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return ptr
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# Param 硬编码大小: Next(8) + Ty(8) + Name(8) + Attrs(8) = 32 字节
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PARAM_SIZE: t.CDefine = 32
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def new_param(pool: memhub.MemBuddy | t.CPtr, ty: LLVMType | t.CPtr,
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name: t.CChar | t.CPtr) -> Param | t.CPtr:
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"""创建一个函数参数"""
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ptr: Param | t.CPtr = pool.alloc(PARAM_SIZE)
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if ptr is None: return None
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string.memset(ptr, 0, PARAM_SIZE)
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ptr.Ty = ty
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ptr.Name = name
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ptr.Attrs = None
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return ptr
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# Function 硬编码大小: Next(8) + Name(8) + RetTy(8) + Params(8) + Blocks(8) + IsDeclared(4) + IsVarArg(4) + Attrs(8) = 56 字节
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FUNC_SIZE: t.CDefine = 56
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def new_function(pool: memhub.MemBuddy | t.CPtr, name: t.CChar | t.CPtr,
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ret_ty: LLVMType | t.CPtr) -> Function | t.CPtr:
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"""创建一个函数"""
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ptr: Function | t.CPtr = pool.alloc(FUNC_SIZE)
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if ptr is None: return None
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string.memset(ptr, 0, FUNC_SIZE)
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ptr.Name = name
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ptr.RetTy = ret_ty
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ptr.Params = _new_gslist(pool, 24) # GSList: Head+Tail+Count
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ptr.Blocks = _new_gslist(pool, 24)
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ptr.IsDeclared = 0
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ptr.Attrs = None
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return ptr
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# ============================================================
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# 链表操作（委托 GSList.append）
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# ============================================================
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def function_add_param(func: Function | t.CPtr, param: Param | t.CPtr):
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"""将参数追加到函数参数链表"""
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if func is None or param is None: return
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if func.Params is None: return
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func.Params.append(param)
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def function_add_block(func: Function | t.CPtr, block: BasicBlock | t.CPtr):
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"""将基本块追加到函数块链表"""
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if func is None or block is None: return
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if func.Blocks is None: return
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func.Blocks.append(block)
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def function_move_block_to_end(func: Function | t.CPtr, block: BasicBlock | t.CPtr):
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"""将 block 移动到函数块链表末尾（保证 BB 文本顺序与控制流顺序一致）。
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用于解决 SSA 名非单调问题：BB 按创建顺序排列，但指令按控制流顺序生成，
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导致 SSA 编号在文本输出时非单调递增，llc 报错。
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在 position_at_end 时调用此函数，使 BB 顺序与 position 顺序一致。
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注意：必须使用 GSList[BasicBlock] 带类型参数，否则 TransPyC 创建不完整
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struct 类型，导致 blocks.Head/Tail/Count 字段访问读取垃圾值。
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"""
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if func is None or block is None: return
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blocks: GSList[BasicBlock] | t.CPtr = func.Blocks
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if blocks is None: return
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# 已经是 Tail，无需移动
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if blocks.Tail is block:
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return
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# 从链表中移除 block
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if blocks.Head is block:
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# block 是 Head，直接后移 Head
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blocks.Head = block.Next
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else:
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# 遍历找前驱
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prev: BasicBlock | t.CPtr = blocks.Head
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while prev is not None and prev.Next is not block:
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prev = prev.Next
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if prev is None:
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# block 不在链表中，直接 append
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blocks.append(block)
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return
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prev.Next = block.Next
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# block.Next 由移除逻辑处理，重置为 None
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block.Next = None
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# append 到末尾（不调用 blocks.append 以避免 Count 重复递增）
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if blocks.Tail is not None:
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blocks.Tail.Next = block
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blocks.Tail = block
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def block_append_line(block: BasicBlock | t.CPtr, line: Line | t.CPtr):
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"""将指令行追加到基本块"""
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if block is None or line is None: return
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if block.Lines is None: return
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block.Lines.append(line)
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def block_append_text(pool: memhub.MemBuddy | t.CPtr, block: BasicBlock | t.CPtr,
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text: t.CChar | t.CPtr):
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"""创建指令行并追加到基本块"""
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if block is None or text is None: return
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line: Line | t.CPtr = new_line(pool, text)
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if line is not None:
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block_append_line(block, line)
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# ============================================================
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# 属性设置
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# ============================================================
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def function_set_attrs(func: Function | t.CPtr, attrs: t.CChar | t.CPtr):
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"""设置函数级属性文本（如 "nounwind"/"noinline"）"""
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if func is None: return
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func.Attrs = attrs
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def param_set_attrs(param: Param | t.CPtr, attrs: t.CChar | t.CPtr):
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"""设置参数属性文本（如 "noundef"/"nocapture"/"readonly"）"""
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if param is None: return
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param.Attrs = attrs
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# ============================================================
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# _ll_name_needs_quote - 检查 LLVM 标识符是否需要加引号
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#
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# LLVM IR 规范：标识符合法字符集为 [-a-zA-Z$._][-a-zA-Z$._0-9]*
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# 以数字开头或含非合法字符（如 '['、']'、' '、'@' 等）时必须用双引号包围。
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# '.' 是合法字符，不需要加引号（如 @.str、@llvm.memcpy 都不加引号）。
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# SHA1 命名空间的函数名（如 "4dad2ba72ed7ba09.GSListNode[Param]"）含 '['、']'，
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# 需要加引号；但纯 hex+点 的名字（如 "abc.def"）不需要。
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# ============================================================
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def _ll_name_needs_quote(name: str) -> t.CInt:
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"""检查 LLVM 标识符是否需要加引号（以数字开头或含非合法字符）
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LLVM IR 合法字符：a-z, A-Z, 0-9, -, $, ., _
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首字符是数字时需要加引号（LLVM 要求局部/全局标识符首字符非数字，除非加引号）。
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含其他字符（如 '['、']'、空格）时需要加引号。
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"""
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if name is None:
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return 0
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c0: t.CChar = name[0]
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if c0 >= '0' and c0 <= '9':
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return 1
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name_len: t.CSizeT = string.strlen(name)
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i: t.CSizeT = 0
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while i < name_len:
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ch: t.CChar = name[i]
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# 合法字符：a-z, A-Z, 0-9, -, $, ., _
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if not ((ch >= 'a' and ch <= 'z') or (ch >= 'A' and ch <= 'Z') or
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(ch >= '0' and ch <= '9') or ch == '-' or ch == '$' or
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ch == '.' or ch == '_'):
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return 1
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i += 1
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return 0
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# ============================================================
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# FunctionPrint: 将函数序列化为 IR 文本
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#
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# 格式:
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# define <ret_ty> @<name>(<params>) {
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# <block_name>:
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# <instruction>
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# <instruction>
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# <block_name>:
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# <instruction>
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# }
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# ============================================================
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def FunctionPrint(buf: t.CChar | t.CPtr, size: t.CSizeT,
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func: Function | t.CPtr, pool: memhub.MemBuddy | t.CPtr):
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"""将函数 func 序列化为 IR 文本写入 buf"""
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if func is None or buf is None or size == 0: return
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ty_buf: t.CChar | t.CPtr = pool.alloc(128)
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if ty_buf is None: return
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ty_buf[0] = '\0'
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# define <ret_ty> @<name>(<params>)
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if func.IsDeclared == 1:
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_append_cstr(buf, size, "declare ")
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else:
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_append_cstr(buf, size, "define ")
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ty_buf[0] = '\0'
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TypePrint(ty_buf, 128, func.RetTy, pool)
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_append_cstr(buf, size, ty_buf)
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_append_cstr(buf, size, " @")
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if func.Name is not None:
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if _ll_name_needs_quote(func.Name) != 0:
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_append_cstr(buf, size, "\"")
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_append_cstr(buf, size, func.Name)
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_append_cstr(buf, size, "\"")
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else:
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_append_cstr(buf, size, func.Name)
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_append_cstr(buf, size, "(")
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# 参数列表（从 GSList[Param].Head 遍历）
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cur: Param | t.CPtr = None
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if func.Params is not None:
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cur = func.Params.Head
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first: t.CInt = 1
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while cur is not None:
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if first == 0:
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_append_cstr(buf, size, ", ")
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# 参数属性（如 "noundef"/"nocapture"）在类型之前
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if cur.Attrs is not None:
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_append_cstr(buf, size, cur.Attrs)
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_append_cstr(buf, size, " ")
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ty_buf[0] = '\0'
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TypePrint(ty_buf, 128, cur.Ty, pool)
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_append_cstr(buf, size, ty_buf)
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# declare 和 define 都打印参数名（如果有）
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if cur.Name is not None:
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_append_cstr(buf, size, " ")
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# LLVM IR 要求参数名以 % 开头
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if cur.Name[0] != '%':
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_append_cstr(buf, size, "%")
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_append_cstr(buf, size, cur.Name)
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cur = cur.Next
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first = 0
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# 变参函数追加 ...
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if func.IsVarArg == 1:
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if func.Params is not None and func.Params.Head is not None:
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_append_cstr(buf, size, ", ...")
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else:
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_append_cstr(buf, size, "...")
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_append_cstr(buf, size, ")")
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# 函数级属性（如 "nounwind"/"noinline"）在 ) 之后
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if func.Attrs is not None:
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_append_cstr(buf, size, " ")
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_append_cstr(buf, size, func.Attrs)
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if func.IsDeclared == 1:
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_append_cstr(buf, size, "\n")
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return
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# 函数体
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_append_cstr(buf, size, " {\n")
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blk: BasicBlock | t.CPtr = None
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if func.Blocks is not None:
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blk = func.Blocks.Head
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while blk is not None:
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# 块标签
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if blk.Name is not None:
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_append_cstr(buf, size, blk.Name)
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_append_cstr(buf, size, ":\n")
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# 指令行（从 GSList[Line].Head 遍历）
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line: Line | t.CPtr = None
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if blk.Lines is not None:
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line = blk.Lines.Head
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while line is not None:
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if line.Buf is not None:
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_append_cstr(buf, size, " ")
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_append_cstr(buf, size, line.Buf)
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_append_cstr(buf, size, "\n")
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line = line.Next
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blk = blk.Next
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_append_cstr(buf, size, "}\n")
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# ============================================================
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# 内部辅助
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# ============================================================
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def _append_cstr(dst: t.CChar | t.CPtr, dst_size: t.CSizeT, src: t.CChar | t.CPtr):
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"""将 C 字符串 src 追加到 dst 末尾"""
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if dst is None or src is None: return
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dlen: t.CSizeT = string.strlen(dst)
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slen: t.CSizeT = string.strlen(src)
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remain: t.CSizeT = dst_size - dlen
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if remain <= 0: return
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i: t.CSizeT = 0
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while i < slen and i + 1 < remain:
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dst[dlen + i] = src[i]
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i += 1
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dst[dlen + i] = '\0'
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# ============================================================
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# 字段访问器（供其他模块绕过 stub 类型限制使用）
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#
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# 跨模块编译时，使用方模块只有 Function/Param 的 stub 类型
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# （字段不足且字段类型可能错误），导致 TransPyC 静默跳过
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# 字段访问（不生成 GEP，不报错），字段值永远为 null。
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#
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# 这些访问器在拥有完整类型定义的本模块内执行，能正确访问
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# 所有字段。其他模块通过函数调用获取字段值，绕过 stub 限制。
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# ============================================================
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def function_get_name(func: Function | t.CPtr) -> t.CChar | t.CPtr:
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"""获取函数名"""
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if func is None:
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return None
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return func.Name
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def function_get_ret_ty(func: Function | t.CPtr) -> LLVMType | t.CPtr:
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"""获取函数返回类型"""
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if func is None:
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return None
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return func.RetTy
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def function_get_params(func: Function | t.CPtr) -> GSList[Param] | t.CPtr:
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"""获取函数参数链表容器"""
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if func is None:
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return None
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return func.Params
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def function_get_param_head(func: Function | t.CPtr) -> Param | t.CPtr:
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"""获取函数参数链表头节点（一步到位，避免调用方访问 GSList.Head）"""
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if func is None:
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return None
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if func.Params is None:
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return None
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return func.Params.Head
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def function_get_next(func: Function | t.CPtr) -> Function | t.CPtr:
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"""获取链表下一个函数"""
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||
if func is None:
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||
return None
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return func.Next
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def function_is_declared(func: Function | t.CPtr) -> t.CInt:
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"""获取函数是否为声明（1=declare 仅声明, 0=define 定义）"""
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if func is None:
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return 0
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return func.IsDeclared
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def param_get_name(param: Param | t.CPtr) -> t.CChar | t.CPtr:
|
||
"""获取参数名"""
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||
if param is None:
|
||
return None
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||
return param.Name
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||
|
||
|
||
def param_get_ty(param: Param | t.CPtr) -> LLVMType | t.CPtr:
|
||
"""获取参数类型"""
|
||
if param is None:
|
||
return None
|
||
return param.Ty
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||
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||
|
||
def param_get_next(param: Param | t.CPtr) -> Param | t.CPtr:
|
||
"""获取链表下一个参数"""
|
||
if param is None:
|
||
return None
|
||
return param.Next
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