712 lines
29 KiB
Python
712 lines
29 KiB
Python
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"""Code generation for native function bodies."""
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from typing import List, Union, Optional
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from typing_extensions import Final
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from mypyc.common import (
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REG_PREFIX, NATIVE_PREFIX, STATIC_PREFIX, TYPE_PREFIX, MODULE_PREFIX,
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)
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from mypyc.codegen.emit import Emitter, TracebackAndGotoHandler, DEBUG_ERRORS
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from mypyc.ir.ops import (
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Op, OpVisitor, Goto, Branch, Return, Assign, Integer, LoadErrorValue, GetAttr, SetAttr,
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LoadStatic, InitStatic, TupleGet, TupleSet, Call, IncRef, DecRef, Box, Cast, Unbox,
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BasicBlock, Value, MethodCall, Unreachable, NAMESPACE_STATIC, NAMESPACE_TYPE, NAMESPACE_MODULE,
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RaiseStandardError, CallC, LoadGlobal, Truncate, IntOp, LoadMem, GetElementPtr,
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LoadAddress, ComparisonOp, SetMem, Register, LoadLiteral, AssignMulti, KeepAlive, Extend,
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ERR_FALSE
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)
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from mypyc.ir.rtypes import (
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RType, RTuple, RArray, is_tagged, is_int32_rprimitive, is_int64_rprimitive, RStruct,
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is_pointer_rprimitive, is_int_rprimitive
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)
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from mypyc.ir.func_ir import FuncIR, FuncDecl, FUNC_STATICMETHOD, FUNC_CLASSMETHOD, all_values
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from mypyc.ir.class_ir import ClassIR
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from mypyc.ir.pprint import generate_names_for_ir
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from mypyc.analysis.blockfreq import frequently_executed_blocks
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def native_function_type(fn: FuncIR, emitter: Emitter) -> str:
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args = ', '.join(emitter.ctype(arg.type) for arg in fn.args) or 'void'
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ret = emitter.ctype(fn.ret_type)
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return f'{ret} (*)({args})'
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def native_function_header(fn: FuncDecl, emitter: Emitter) -> str:
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args = []
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for arg in fn.sig.args:
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args.append(f'{emitter.ctype_spaced(arg.type)}{REG_PREFIX}{arg.name}')
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return '{ret_type}{name}({args})'.format(
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ret_type=emitter.ctype_spaced(fn.sig.ret_type),
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name=emitter.native_function_name(fn),
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args=', '.join(args) or 'void')
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def generate_native_function(fn: FuncIR,
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emitter: Emitter,
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source_path: str,
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module_name: str) -> None:
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declarations = Emitter(emitter.context)
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names = generate_names_for_ir(fn.arg_regs, fn.blocks)
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body = Emitter(emitter.context, names)
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visitor = FunctionEmitterVisitor(body, declarations, source_path, module_name)
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declarations.emit_line(f'{native_function_header(fn.decl, emitter)} {{')
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body.indent()
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for r in all_values(fn.arg_regs, fn.blocks):
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if isinstance(r.type, RTuple):
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emitter.declare_tuple_struct(r.type)
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if isinstance(r.type, RArray):
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continue # Special: declared on first assignment
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if r in fn.arg_regs:
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continue # Skip the arguments
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ctype = emitter.ctype_spaced(r.type)
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init = ''
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declarations.emit_line('{ctype}{prefix}{name}{init};'.format(ctype=ctype,
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prefix=REG_PREFIX,
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name=names[r],
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init=init))
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# Before we emit the blocks, give them all labels
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blocks = fn.blocks
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for i, block in enumerate(blocks):
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block.label = i
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common = frequently_executed_blocks(fn.blocks[0])
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for i in range(len(blocks)):
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block = blocks[i]
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visitor.rare = block not in common
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next_block = None
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if i + 1 < len(blocks):
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next_block = blocks[i + 1]
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body.emit_label(block)
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visitor.next_block = next_block
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ops = block.ops
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visitor.ops = ops
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visitor.op_index = 0
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while visitor.op_index < len(ops):
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ops[visitor.op_index].accept(visitor)
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visitor.op_index += 1
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body.emit_line('}')
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emitter.emit_from_emitter(declarations)
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emitter.emit_from_emitter(body)
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class FunctionEmitterVisitor(OpVisitor[None]):
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def __init__(self,
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emitter: Emitter,
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declarations: Emitter,
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source_path: str,
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module_name: str) -> None:
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self.emitter = emitter
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self.names = emitter.names
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self.declarations = declarations
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self.source_path = source_path
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self.module_name = module_name
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self.literals = emitter.context.literals
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self.rare = False
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# Next basic block to be processed after the current one (if any), set by caller
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self.next_block: Optional[BasicBlock] = None
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# Ops in the basic block currently being processed, set by caller
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self.ops: List[Op] = []
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# Current index within ops; visit methods can increment this to skip/merge ops
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self.op_index = 0
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def temp_name(self) -> str:
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return self.emitter.temp_name()
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def visit_goto(self, op: Goto) -> None:
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if op.label is not self.next_block:
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self.emit_line('goto %s;' % self.label(op.label))
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def visit_branch(self, op: Branch) -> None:
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true, false = op.true, op.false
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if op.op == Branch.IS_ERROR and isinstance(op.value, GetAttr) and not op.negated:
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op2 = op.value
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if op2.class_type.class_ir.is_always_defined(op2.attr):
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# Getting an always defined attribute never fails, so the branch can be omitted.
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if false is not self.next_block:
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self.emit_line('goto {};'.format(self.label(false)))
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return
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negated = op.negated
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negated_rare = False
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if true is self.next_block and op.traceback_entry is None:
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# Switch true/false since it avoids an else block.
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true, false = false, true
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negated = not negated
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negated_rare = True
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neg = '!' if negated else ''
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cond = ''
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if op.op == Branch.BOOL:
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expr_result = self.reg(op.value)
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cond = f'{neg}{expr_result}'
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elif op.op == Branch.IS_ERROR:
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typ = op.value.type
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compare = '!=' if negated else '=='
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if isinstance(typ, RTuple):
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# TODO: What about empty tuple?
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cond = self.emitter.tuple_undefined_check_cond(typ,
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self.reg(op.value),
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self.c_error_value,
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compare)
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else:
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cond = '{} {} {}'.format(self.reg(op.value),
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compare,
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self.c_error_value(typ))
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else:
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assert False, "Invalid branch"
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# For error checks, tell the compiler the branch is unlikely
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if op.traceback_entry is not None or op.rare:
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if not negated_rare:
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cond = f'unlikely({cond})'
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else:
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cond = f'likely({cond})'
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if false is self.next_block:
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if op.traceback_entry is None:
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self.emit_line(f'if ({cond}) goto {self.label(true)};')
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else:
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self.emit_line(f'if ({cond}) {{')
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self.emit_traceback(op)
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self.emit_lines(
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'goto %s;' % self.label(true),
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'}'
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)
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else:
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self.emit_line(f'if ({cond}) {{')
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self.emit_traceback(op)
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self.emit_lines(
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'goto %s;' % self.label(true),
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'} else',
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' goto %s;' % self.label(false)
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)
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def visit_return(self, op: Return) -> None:
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value_str = self.reg(op.value)
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self.emit_line('return %s;' % value_str)
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def visit_tuple_set(self, op: TupleSet) -> None:
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dest = self.reg(op)
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tuple_type = op.tuple_type
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self.emitter.declare_tuple_struct(tuple_type)
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if len(op.items) == 0: # empty tuple
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self.emit_line(f'{dest}.empty_struct_error_flag = 0;')
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else:
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for i, item in enumerate(op.items):
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self.emit_line(f'{dest}.f{i} = {self.reg(item)};')
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self.emit_inc_ref(dest, tuple_type)
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def visit_assign(self, op: Assign) -> None:
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dest = self.reg(op.dest)
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src = self.reg(op.src)
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# clang whines about self assignment (which we might generate
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# for some casts), so don't emit it.
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if dest != src:
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# We sometimes assign from an integer prepresentation of a pointer
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# to a real pointer, and C compilers insist on a cast.
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if op.src.type.is_unboxed and not op.dest.type.is_unboxed:
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src = f'(void *){src}'
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self.emit_line(f'{dest} = {src};')
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def visit_assign_multi(self, op: AssignMulti) -> None:
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typ = op.dest.type
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assert isinstance(typ, RArray)
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dest = self.reg(op.dest)
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# RArray values can only be assigned to once, so we can always
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# declare them on initialization.
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self.emit_line('%s%s[%d] = {%s};' % (
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self.emitter.ctype_spaced(typ.item_type),
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dest,
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len(op.src),
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', '.join(self.reg(s) for s in op.src)))
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def visit_load_error_value(self, op: LoadErrorValue) -> None:
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if isinstance(op.type, RTuple):
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values = [self.c_undefined_value(item) for item in op.type.types]
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tmp = self.temp_name()
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self.emit_line('{} {} = {{ {} }};'.format(self.ctype(op.type), tmp, ', '.join(values)))
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self.emit_line(f'{self.reg(op)} = {tmp};')
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else:
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self.emit_line('{} = {};'.format(self.reg(op),
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self.c_error_value(op.type)))
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def visit_load_literal(self, op: LoadLiteral) -> None:
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index = self.literals.literal_index(op.value)
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s = repr(op.value)
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if not any(x in s for x in ('/*', '*/', '\0')):
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ann = ' /* %s */' % s
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else:
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ann = ''
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if not is_int_rprimitive(op.type):
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self.emit_line('%s = CPyStatics[%d];%s' % (self.reg(op), index, ann))
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else:
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self.emit_line('%s = (CPyTagged)CPyStatics[%d] | 1;%s' % (
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self.reg(op), index, ann))
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def get_attr_expr(self, obj: str, op: Union[GetAttr, SetAttr], decl_cl: ClassIR) -> str:
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"""Generate attribute accessor for normal (non-property) access.
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This either has a form like obj->attr_name for attributes defined in non-trait
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classes, and *(obj + attr_offset) for attributes defined by traits. We also
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insert all necessary C casts here.
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"""
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cast = f'({op.class_type.struct_name(self.emitter.names)} *)'
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if decl_cl.is_trait and op.class_type.class_ir.is_trait:
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# For pure trait access find the offset first, offsets
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# are ordered by attribute position in the cl.attributes dict.
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# TODO: pre-calculate the mapping to make this faster.
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trait_attr_index = list(decl_cl.attributes).index(op.attr)
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# TODO: reuse these names somehow?
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offset = self.emitter.temp_name()
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self.declarations.emit_line(f'size_t {offset};')
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self.emitter.emit_line('{} = {};'.format(
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offset,
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'CPy_FindAttrOffset({}, {}, {})'.format(
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self.emitter.type_struct_name(decl_cl),
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f'({cast}{obj})->vtable',
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trait_attr_index,
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)
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))
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attr_cast = f'({self.ctype(op.class_type.attr_type(op.attr))} *)'
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return f'*{attr_cast}((char *){obj} + {offset})'
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else:
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# Cast to something non-trait. Note: for this to work, all struct
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# members for non-trait classes must obey monotonic linear growth.
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if op.class_type.class_ir.is_trait:
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assert not decl_cl.is_trait
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cast = f'({decl_cl.struct_name(self.emitter.names)} *)'
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return '({}{})->{}'.format(
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cast, obj, self.emitter.attr(op.attr)
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)
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def visit_get_attr(self, op: GetAttr) -> None:
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dest = self.reg(op)
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obj = self.reg(op.obj)
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rtype = op.class_type
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cl = rtype.class_ir
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attr_rtype, decl_cl = cl.attr_details(op.attr)
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if cl.get_method(op.attr):
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# Properties are essentially methods, so use vtable access for them.
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version = '_TRAIT' if cl.is_trait else ''
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self.emit_line('%s = CPY_GET_ATTR%s(%s, %s, %d, %s, %s); /* %s */' % (
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dest,
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version,
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obj,
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self.emitter.type_struct_name(rtype.class_ir),
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rtype.getter_index(op.attr),
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rtype.struct_name(self.names),
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self.ctype(rtype.attr_type(op.attr)),
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op.attr))
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else:
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# Otherwise, use direct or offset struct access.
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attr_expr = self.get_attr_expr(obj, op, decl_cl)
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self.emitter.emit_line(f'{dest} = {attr_expr};')
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always_defined = cl.is_always_defined(op.attr)
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merged_branch = None
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if not always_defined:
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self.emitter.emit_undefined_attr_check(
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attr_rtype, dest, '==', unlikely=True
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)
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branch = self.next_branch()
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if branch is not None:
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if (branch.value is op
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and branch.op == Branch.IS_ERROR
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and branch.traceback_entry is not None
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and not branch.negated):
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# Generate code for the following branch here to avoid
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# redundant branches in the generated code.
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self.emit_attribute_error(branch, cl.name, op.attr)
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self.emit_line('goto %s;' % self.label(branch.true))
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merged_branch = branch
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self.emitter.emit_line('}')
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if not merged_branch:
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exc_class = 'PyExc_AttributeError'
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self.emitter.emit_line(
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'PyErr_SetString({}, "attribute {} of {} undefined");'.format(
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exc_class, repr(op.attr), repr(cl.name)))
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|
|
if attr_rtype.is_refcounted and not op.is_borrowed:
|
||
|
|
if not merged_branch and not always_defined:
|
||
|
|
self.emitter.emit_line('} else {')
|
||
|
|
self.emitter.emit_inc_ref(dest, attr_rtype)
|
||
|
|
if merged_branch:
|
||
|
|
if merged_branch.false is not self.next_block:
|
||
|
|
self.emit_line('goto %s;' % self.label(merged_branch.false))
|
||
|
|
self.op_index += 1
|
||
|
|
elif not always_defined:
|
||
|
|
self.emitter.emit_line('}')
|
||
|
|
|
||
|
|
def next_branch(self) -> Optional[Branch]:
|
||
|
|
if self.op_index + 1 < len(self.ops):
|
||
|
|
next_op = self.ops[self.op_index + 1]
|
||
|
|
if isinstance(next_op, Branch):
|
||
|
|
return next_op
|
||
|
|
return None
|
||
|
|
|
||
|
|
def visit_set_attr(self, op: SetAttr) -> None:
|
||
|
|
if op.error_kind == ERR_FALSE:
|
||
|
|
dest = self.reg(op)
|
||
|
|
obj = self.reg(op.obj)
|
||
|
|
src = self.reg(op.src)
|
||
|
|
rtype = op.class_type
|
||
|
|
cl = rtype.class_ir
|
||
|
|
attr_rtype, decl_cl = cl.attr_details(op.attr)
|
||
|
|
if cl.get_method(op.attr):
|
||
|
|
# Again, use vtable access for properties...
|
||
|
|
assert not op.is_init and op.error_kind == ERR_FALSE, '%s %d %d %s' % (
|
||
|
|
op.attr, op.is_init, op.error_kind, rtype)
|
||
|
|
version = '_TRAIT' if cl.is_trait else ''
|
||
|
|
self.emit_line('%s = CPY_SET_ATTR%s(%s, %s, %d, %s, %s, %s); /* %s */' % (
|
||
|
|
dest,
|
||
|
|
version,
|
||
|
|
obj,
|
||
|
|
self.emitter.type_struct_name(rtype.class_ir),
|
||
|
|
rtype.setter_index(op.attr),
|
||
|
|
src,
|
||
|
|
rtype.struct_name(self.names),
|
||
|
|
self.ctype(rtype.attr_type(op.attr)),
|
||
|
|
op.attr))
|
||
|
|
else:
|
||
|
|
# ...and struct access for normal attributes.
|
||
|
|
attr_expr = self.get_attr_expr(obj, op, decl_cl)
|
||
|
|
if not op.is_init and attr_rtype.is_refcounted:
|
||
|
|
# This is not an initalization (where we know that the attribute was
|
||
|
|
# previously undefined), so decref the old value.
|
||
|
|
always_defined = cl.is_always_defined(op.attr)
|
||
|
|
if not always_defined:
|
||
|
|
self.emitter.emit_undefined_attr_check(attr_rtype, attr_expr, '!=')
|
||
|
|
self.emitter.emit_dec_ref(attr_expr, attr_rtype)
|
||
|
|
if not always_defined:
|
||
|
|
self.emitter.emit_line('}')
|
||
|
|
# This steals the reference to src, so we don't need to increment the arg
|
||
|
|
self.emitter.emit_line(f'{attr_expr} = {src};')
|
||
|
|
if op.error_kind == ERR_FALSE:
|
||
|
|
self.emitter.emit_line(f'{dest} = 1;')
|
||
|
|
|
||
|
|
PREFIX_MAP: Final = {
|
||
|
|
NAMESPACE_STATIC: STATIC_PREFIX,
|
||
|
|
NAMESPACE_TYPE: TYPE_PREFIX,
|
||
|
|
NAMESPACE_MODULE: MODULE_PREFIX,
|
||
|
|
}
|
||
|
|
|
||
|
|
def visit_load_static(self, op: LoadStatic) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
prefix = self.PREFIX_MAP[op.namespace]
|
||
|
|
name = self.emitter.static_name(op.identifier, op.module_name, prefix)
|
||
|
|
if op.namespace == NAMESPACE_TYPE:
|
||
|
|
name = '(PyObject *)%s' % name
|
||
|
|
ann = ''
|
||
|
|
if op.ann:
|
||
|
|
s = repr(op.ann)
|
||
|
|
if not any(x in s for x in ('/*', '*/', '\0')):
|
||
|
|
ann = ' /* %s */' % s
|
||
|
|
self.emit_line(f'{dest} = {name};{ann}')
|
||
|
|
|
||
|
|
def visit_init_static(self, op: InitStatic) -> None:
|
||
|
|
value = self.reg(op.value)
|
||
|
|
prefix = self.PREFIX_MAP[op.namespace]
|
||
|
|
name = self.emitter.static_name(op.identifier, op.module_name, prefix)
|
||
|
|
if op.namespace == NAMESPACE_TYPE:
|
||
|
|
value = '(PyTypeObject *)%s' % value
|
||
|
|
self.emit_line(f'{name} = {value};')
|
||
|
|
self.emit_inc_ref(name, op.value.type)
|
||
|
|
|
||
|
|
def visit_tuple_get(self, op: TupleGet) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
src = self.reg(op.src)
|
||
|
|
self.emit_line(f'{dest} = {src}.f{op.index};')
|
||
|
|
self.emit_inc_ref(dest, op.type)
|
||
|
|
|
||
|
|
def get_dest_assign(self, dest: Value) -> str:
|
||
|
|
if not dest.is_void:
|
||
|
|
return self.reg(dest) + ' = '
|
||
|
|
else:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
def visit_call(self, op: Call) -> None:
|
||
|
|
"""Call native function."""
|
||
|
|
dest = self.get_dest_assign(op)
|
||
|
|
args = ', '.join(self.reg(arg) for arg in op.args)
|
||
|
|
lib = self.emitter.get_group_prefix(op.fn)
|
||
|
|
cname = op.fn.cname(self.names)
|
||
|
|
self.emit_line(f'{dest}{lib}{NATIVE_PREFIX}{cname}({args});')
|
||
|
|
|
||
|
|
def visit_method_call(self, op: MethodCall) -> None:
|
||
|
|
"""Call native method."""
|
||
|
|
dest = self.get_dest_assign(op)
|
||
|
|
obj = self.reg(op.obj)
|
||
|
|
|
||
|
|
rtype = op.receiver_type
|
||
|
|
class_ir = rtype.class_ir
|
||
|
|
name = op.method
|
||
|
|
method = rtype.class_ir.get_method(name)
|
||
|
|
assert method is not None
|
||
|
|
|
||
|
|
# Can we call the method directly, bypassing vtable?
|
||
|
|
is_direct = class_ir.is_method_final(name)
|
||
|
|
|
||
|
|
# The first argument gets omitted for static methods and
|
||
|
|
# turned into the class for class methods
|
||
|
|
obj_args = (
|
||
|
|
[] if method.decl.kind == FUNC_STATICMETHOD else
|
||
|
|
[f'(PyObject *)Py_TYPE({obj})'] if method.decl.kind == FUNC_CLASSMETHOD else
|
||
|
|
[obj])
|
||
|
|
args = ', '.join(obj_args + [self.reg(arg) for arg in op.args])
|
||
|
|
mtype = native_function_type(method, self.emitter)
|
||
|
|
version = '_TRAIT' if rtype.class_ir.is_trait else ''
|
||
|
|
if is_direct:
|
||
|
|
# Directly call method, without going through the vtable.
|
||
|
|
lib = self.emitter.get_group_prefix(method.decl)
|
||
|
|
self.emit_line('{}{}{}{}({});'.format(
|
||
|
|
dest, lib, NATIVE_PREFIX, method.cname(self.names), args))
|
||
|
|
else:
|
||
|
|
# Call using vtable.
|
||
|
|
method_idx = rtype.method_index(name)
|
||
|
|
self.emit_line('{}CPY_GET_METHOD{}({}, {}, {}, {}, {})({}); /* {} */'.format(
|
||
|
|
dest, version, obj, self.emitter.type_struct_name(rtype.class_ir),
|
||
|
|
method_idx, rtype.struct_name(self.names), mtype, args, op.method))
|
||
|
|
|
||
|
|
def visit_inc_ref(self, op: IncRef) -> None:
|
||
|
|
src = self.reg(op.src)
|
||
|
|
self.emit_inc_ref(src, op.src.type)
|
||
|
|
|
||
|
|
def visit_dec_ref(self, op: DecRef) -> None:
|
||
|
|
src = self.reg(op.src)
|
||
|
|
self.emit_dec_ref(src, op.src.type, is_xdec=op.is_xdec)
|
||
|
|
|
||
|
|
def visit_box(self, op: Box) -> None:
|
||
|
|
self.emitter.emit_box(self.reg(op.src), self.reg(op), op.src.type, can_borrow=True)
|
||
|
|
|
||
|
|
def visit_cast(self, op: Cast) -> None:
|
||
|
|
branch = self.next_branch()
|
||
|
|
handler = None
|
||
|
|
if branch is not None:
|
||
|
|
if (branch.value is op
|
||
|
|
and branch.op == Branch.IS_ERROR
|
||
|
|
and branch.traceback_entry is not None
|
||
|
|
and not branch.negated
|
||
|
|
and branch.false is self.next_block):
|
||
|
|
# Generate code also for the following branch here to avoid
|
||
|
|
# redundant branches in the generated code.
|
||
|
|
handler = TracebackAndGotoHandler(self.label(branch.true),
|
||
|
|
self.source_path,
|
||
|
|
self.module_name,
|
||
|
|
branch.traceback_entry)
|
||
|
|
self.op_index += 1
|
||
|
|
|
||
|
|
self.emitter.emit_cast(self.reg(op.src), self.reg(op), op.type,
|
||
|
|
src_type=op.src.type, error=handler)
|
||
|
|
|
||
|
|
def visit_unbox(self, op: Unbox) -> None:
|
||
|
|
self.emitter.emit_unbox(self.reg(op.src), self.reg(op), op.type)
|
||
|
|
|
||
|
|
def visit_unreachable(self, op: Unreachable) -> None:
|
||
|
|
self.emitter.emit_line('CPy_Unreachable();')
|
||
|
|
|
||
|
|
def visit_raise_standard_error(self, op: RaiseStandardError) -> None:
|
||
|
|
# TODO: Better escaping of backspaces and such
|
||
|
|
if op.value is not None:
|
||
|
|
if isinstance(op.value, str):
|
||
|
|
message = op.value.replace('"', '\\"')
|
||
|
|
self.emitter.emit_line(
|
||
|
|
f'PyErr_SetString(PyExc_{op.class_name}, "{message}");')
|
||
|
|
elif isinstance(op.value, Value):
|
||
|
|
self.emitter.emit_line(
|
||
|
|
'PyErr_SetObject(PyExc_{}, {});'.format(op.class_name,
|
||
|
|
self.emitter.reg(op.value)))
|
||
|
|
else:
|
||
|
|
assert False, 'op value type must be either str or Value'
|
||
|
|
else:
|
||
|
|
self.emitter.emit_line(f'PyErr_SetNone(PyExc_{op.class_name});')
|
||
|
|
self.emitter.emit_line(f'{self.reg(op)} = 0;')
|
||
|
|
|
||
|
|
def visit_call_c(self, op: CallC) -> None:
|
||
|
|
if op.is_void:
|
||
|
|
dest = ''
|
||
|
|
else:
|
||
|
|
dest = self.get_dest_assign(op)
|
||
|
|
args = ', '.join(self.reg(arg) for arg in op.args)
|
||
|
|
self.emitter.emit_line(f"{dest}{op.function_name}({args});")
|
||
|
|
|
||
|
|
def visit_truncate(self, op: Truncate) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
value = self.reg(op.src)
|
||
|
|
# for C backend the generated code are straight assignments
|
||
|
|
self.emit_line(f"{dest} = {value};")
|
||
|
|
|
||
|
|
def visit_extend(self, op: Extend) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
value = self.reg(op.src)
|
||
|
|
if op.signed:
|
||
|
|
src_cast = self.emit_signed_int_cast(op.src.type)
|
||
|
|
else:
|
||
|
|
src_cast = self.emit_unsigned_int_cast(op.src.type)
|
||
|
|
self.emit_line("{} = {}{};".format(dest, src_cast, value))
|
||
|
|
|
||
|
|
def visit_load_global(self, op: LoadGlobal) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
ann = ''
|
||
|
|
if op.ann:
|
||
|
|
s = repr(op.ann)
|
||
|
|
if not any(x in s for x in ('/*', '*/', '\0')):
|
||
|
|
ann = ' /* %s */' % s
|
||
|
|
self.emit_line(f'{dest} = {op.identifier};{ann}')
|
||
|
|
|
||
|
|
def visit_int_op(self, op: IntOp) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
lhs = self.reg(op.lhs)
|
||
|
|
rhs = self.reg(op.rhs)
|
||
|
|
if op.op == IntOp.RIGHT_SHIFT:
|
||
|
|
# Signed right shift
|
||
|
|
lhs = self.emit_signed_int_cast(op.lhs.type) + lhs
|
||
|
|
rhs = self.emit_signed_int_cast(op.rhs.type) + rhs
|
||
|
|
self.emit_line(f'{dest} = {lhs} {op.op_str[op.op]} {rhs};')
|
||
|
|
|
||
|
|
def visit_comparison_op(self, op: ComparisonOp) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
lhs = self.reg(op.lhs)
|
||
|
|
rhs = self.reg(op.rhs)
|
||
|
|
lhs_cast = ""
|
||
|
|
rhs_cast = ""
|
||
|
|
if op.op in (ComparisonOp.SLT, ComparisonOp.SGT, ComparisonOp.SLE, ComparisonOp.SGE):
|
||
|
|
# Always signed comparison op
|
||
|
|
lhs_cast = self.emit_signed_int_cast(op.lhs.type)
|
||
|
|
rhs_cast = self.emit_signed_int_cast(op.rhs.type)
|
||
|
|
elif op.op in (ComparisonOp.ULT, ComparisonOp.UGT, ComparisonOp.ULE, ComparisonOp.UGE):
|
||
|
|
# Always unsigned comparison op
|
||
|
|
lhs_cast = self.emit_unsigned_int_cast(op.lhs.type)
|
||
|
|
rhs_cast = self.emit_unsigned_int_cast(op.rhs.type)
|
||
|
|
elif isinstance(op.lhs, Integer) and op.lhs.value < 0:
|
||
|
|
# Force signed ==/!= with negative operand
|
||
|
|
rhs_cast = self.emit_signed_int_cast(op.rhs.type)
|
||
|
|
elif isinstance(op.rhs, Integer) and op.rhs.value < 0:
|
||
|
|
# Force signed ==/!= with negative operand
|
||
|
|
lhs_cast = self.emit_signed_int_cast(op.lhs.type)
|
||
|
|
self.emit_line('{} = {}{} {} {}{};'.format(dest, lhs_cast, lhs,
|
||
|
|
op.op_str[op.op], rhs_cast, rhs))
|
||
|
|
|
||
|
|
def visit_load_mem(self, op: LoadMem) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
src = self.reg(op.src)
|
||
|
|
# TODO: we shouldn't dereference to type that are pointer type so far
|
||
|
|
type = self.ctype(op.type)
|
||
|
|
self.emit_line(f'{dest} = *({type} *){src};')
|
||
|
|
|
||
|
|
def visit_set_mem(self, op: SetMem) -> None:
|
||
|
|
dest = self.reg(op.dest)
|
||
|
|
src = self.reg(op.src)
|
||
|
|
dest_type = self.ctype(op.dest_type)
|
||
|
|
# clang whines about self assignment (which we might generate
|
||
|
|
# for some casts), so don't emit it.
|
||
|
|
if dest != src:
|
||
|
|
self.emit_line(f'*({dest_type} *){dest} = {src};')
|
||
|
|
|
||
|
|
def visit_get_element_ptr(self, op: GetElementPtr) -> None:
|
||
|
|
dest = self.reg(op)
|
||
|
|
src = self.reg(op.src)
|
||
|
|
# TODO: support tuple type
|
||
|
|
assert isinstance(op.src_type, RStruct)
|
||
|
|
assert op.field in op.src_type.names, "Invalid field name."
|
||
|
|
self.emit_line('{} = ({})&(({} *){})->{};'.format(dest, op.type._ctype, op.src_type.name,
|
||
|
|
src, op.field))
|
||
|
|
|
||
|
|
def visit_load_address(self, op: LoadAddress) -> None:
|
||
|
|
typ = op.type
|
||
|
|
dest = self.reg(op)
|
||
|
|
src = self.reg(op.src) if isinstance(op.src, Register) else op.src
|
||
|
|
self.emit_line(f'{dest} = ({typ._ctype})&{src};')
|
||
|
|
|
||
|
|
def visit_keep_alive(self, op: KeepAlive) -> None:
|
||
|
|
# This is a no-op.
|
||
|
|
pass
|
||
|
|
|
||
|
|
# Helpers
|
||
|
|
|
||
|
|
def label(self, label: BasicBlock) -> str:
|
||
|
|
return self.emitter.label(label)
|
||
|
|
|
||
|
|
def reg(self, reg: Value) -> str:
|
||
|
|
if isinstance(reg, Integer):
|
||
|
|
val = reg.value
|
||
|
|
if val == 0 and is_pointer_rprimitive(reg.type):
|
||
|
|
return "NULL"
|
||
|
|
s = str(val)
|
||
|
|
if val >= (1 << 31):
|
||
|
|
# Avoid overflowing signed 32-bit int
|
||
|
|
if val >= (1 << 63):
|
||
|
|
s += 'ULL'
|
||
|
|
else:
|
||
|
|
s += 'LL'
|
||
|
|
elif val == -(1 << 63):
|
||
|
|
# Avoid overflowing C integer literal
|
||
|
|
s = '(-9223372036854775807LL - 1)'
|
||
|
|
elif val <= -(1 << 31):
|
||
|
|
s += 'LL'
|
||
|
|
return s
|
||
|
|
else:
|
||
|
|
return self.emitter.reg(reg)
|
||
|
|
|
||
|
|
def ctype(self, rtype: RType) -> str:
|
||
|
|
return self.emitter.ctype(rtype)
|
||
|
|
|
||
|
|
def c_error_value(self, rtype: RType) -> str:
|
||
|
|
return self.emitter.c_error_value(rtype)
|
||
|
|
|
||
|
|
def c_undefined_value(self, rtype: RType) -> str:
|
||
|
|
return self.emitter.c_undefined_value(rtype)
|
||
|
|
|
||
|
|
def emit_line(self, line: str) -> None:
|
||
|
|
self.emitter.emit_line(line)
|
||
|
|
|
||
|
|
def emit_lines(self, *lines: str) -> None:
|
||
|
|
self.emitter.emit_lines(*lines)
|
||
|
|
|
||
|
|
def emit_inc_ref(self, dest: str, rtype: RType) -> None:
|
||
|
|
self.emitter.emit_inc_ref(dest, rtype, rare=self.rare)
|
||
|
|
|
||
|
|
def emit_dec_ref(self, dest: str, rtype: RType, is_xdec: bool) -> None:
|
||
|
|
self.emitter.emit_dec_ref(dest, rtype, is_xdec=is_xdec, rare=self.rare)
|
||
|
|
|
||
|
|
def emit_declaration(self, line: str) -> None:
|
||
|
|
self.declarations.emit_line(line)
|
||
|
|
|
||
|
|
def emit_traceback(self, op: Branch) -> None:
|
||
|
|
if op.traceback_entry is not None:
|
||
|
|
self.emitter.emit_traceback(self.source_path, self.module_name, op.traceback_entry)
|
||
|
|
|
||
|
|
def emit_attribute_error(self, op: Branch, class_name: str, attr: str) -> None:
|
||
|
|
assert op.traceback_entry is not None
|
||
|
|
globals_static = self.emitter.static_name('globals', self.module_name)
|
||
|
|
self.emit_line('CPy_AttributeError("%s", "%s", "%s", "%s", %d, %s);' % (
|
||
|
|
self.source_path.replace("\\", "\\\\"),
|
||
|
|
op.traceback_entry[0],
|
||
|
|
class_name,
|
||
|
|
attr,
|
||
|
|
op.traceback_entry[1],
|
||
|
|
globals_static))
|
||
|
|
if DEBUG_ERRORS:
|
||
|
|
self.emit_line('assert(PyErr_Occurred() != NULL && "failure w/o err!");')
|
||
|
|
|
||
|
|
def emit_signed_int_cast(self, type: RType) -> str:
|
||
|
|
if is_tagged(type):
|
||
|
|
return '(Py_ssize_t)'
|
||
|
|
else:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
def emit_unsigned_int_cast(self, type: RType) -> str:
|
||
|
|
if is_int32_rprimitive(type):
|
||
|
|
return '(uint32_t)'
|
||
|
|
elif is_int64_rprimitive(type):
|
||
|
|
return '(uint64_t)'
|
||
|
|
else:
|
||
|
|
return ''
|