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efb2413ce8
Issue #25843: When compiling code, don't merge constants if they are equal but have a different types. For example, "f1, f2 = lambda: 1, lambda: 1.0" is now correctly compiled to two different functions: f1() returns 1 (int) and f2() returns 1.0 (int), even if 1 and 1.0 are equal. Add a new _PyCode_ConstantKey() private function.
135 lines
5.1 KiB
C
135 lines
5.1 KiB
C
/* Definitions for bytecode */
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#ifndef Py_LIMITED_API
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#ifndef Py_CODE_H
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#define Py_CODE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Bytecode object */
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typedef struct {
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PyObject_HEAD
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int co_argcount; /* #arguments, except *args */
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int co_kwonlyargcount; /* #keyword only arguments */
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int co_nlocals; /* #local variables */
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int co_stacksize; /* #entries needed for evaluation stack */
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int co_flags; /* CO_..., see below */
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PyObject *co_code; /* instruction opcodes */
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PyObject *co_consts; /* list (constants used) */
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PyObject *co_names; /* list of strings (names used) */
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PyObject *co_varnames; /* tuple of strings (local variable names) */
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PyObject *co_freevars; /* tuple of strings (free variable names) */
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PyObject *co_cellvars; /* tuple of strings (cell variable names) */
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/* The rest aren't used in either hash or comparisons, except for
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co_name (used in both) and co_firstlineno (used only in
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comparisons). This is done to preserve the name and line number
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for tracebacks and debuggers; otherwise, constant de-duplication
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would collapse identical functions/lambdas defined on different lines.
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*/
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unsigned char *co_cell2arg; /* Maps cell vars which are arguments. */
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PyObject *co_filename; /* unicode (where it was loaded from) */
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PyObject *co_name; /* unicode (name, for reference) */
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int co_firstlineno; /* first source line number */
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PyObject *co_lnotab; /* string (encoding addr<->lineno mapping) See
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Objects/lnotab_notes.txt for details. */
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void *co_zombieframe; /* for optimization only (see frameobject.c) */
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PyObject *co_weakreflist; /* to support weakrefs to code objects */
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} PyCodeObject;
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/* Masks for co_flags above */
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#define CO_OPTIMIZED 0x0001
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#define CO_NEWLOCALS 0x0002
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#define CO_VARARGS 0x0004
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#define CO_VARKEYWORDS 0x0008
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#define CO_NESTED 0x0010
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#define CO_GENERATOR 0x0020
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/* The CO_NOFREE flag is set if there are no free or cell variables.
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This information is redundant, but it allows a single flag test
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to determine whether there is any extra work to be done when the
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call frame it setup.
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*/
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#define CO_NOFREE 0x0040
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/* The CO_COROUTINE flag is set for coroutine functions (defined with
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``async def`` keywords) */
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#define CO_COROUTINE 0x0080
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#define CO_ITERABLE_COROUTINE 0x0100
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/* These are no longer used. */
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#if 0
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#define CO_GENERATOR_ALLOWED 0x1000
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#endif
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#define CO_FUTURE_DIVISION 0x2000
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#define CO_FUTURE_ABSOLUTE_IMPORT 0x4000 /* do absolute imports by default */
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#define CO_FUTURE_WITH_STATEMENT 0x8000
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#define CO_FUTURE_PRINT_FUNCTION 0x10000
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#define CO_FUTURE_UNICODE_LITERALS 0x20000
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#define CO_FUTURE_BARRY_AS_BDFL 0x40000
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#define CO_FUTURE_GENERATOR_STOP 0x80000
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/* This value is found in the co_cell2arg array when the associated cell
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variable does not correspond to an argument. The maximum number of
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arguments is 255 (indexed up to 254), so 255 work as a special flag.*/
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#define CO_CELL_NOT_AN_ARG 255
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/* This should be defined if a future statement modifies the syntax.
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For example, when a keyword is added.
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*/
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#define PY_PARSER_REQUIRES_FUTURE_KEYWORD
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#define CO_MAXBLOCKS 20 /* Max static block nesting within a function */
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PyAPI_DATA(PyTypeObject) PyCode_Type;
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#define PyCode_Check(op) (Py_TYPE(op) == &PyCode_Type)
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#define PyCode_GetNumFree(op) (PyTuple_GET_SIZE((op)->co_freevars))
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/* Public interface */
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PyAPI_FUNC(PyCodeObject *) PyCode_New(
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int, int, int, int, int, PyObject *, PyObject *,
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PyObject *, PyObject *, PyObject *, PyObject *,
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PyObject *, PyObject *, int, PyObject *);
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/* same as struct above */
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/* Creates a new empty code object with the specified source location. */
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PyAPI_FUNC(PyCodeObject *)
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PyCode_NewEmpty(const char *filename, const char *funcname, int firstlineno);
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/* Return the line number associated with the specified bytecode index
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in this code object. If you just need the line number of a frame,
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use PyFrame_GetLineNumber() instead. */
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PyAPI_FUNC(int) PyCode_Addr2Line(PyCodeObject *, int);
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/* for internal use only */
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typedef struct _addr_pair {
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int ap_lower;
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int ap_upper;
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} PyAddrPair;
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#ifndef Py_LIMITED_API
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/* Update *bounds to describe the first and one-past-the-last instructions in the
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same line as lasti. Return the number of that line.
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*/
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PyAPI_FUNC(int) _PyCode_CheckLineNumber(PyCodeObject* co,
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int lasti, PyAddrPair *bounds);
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/* Create a comparable key used to compare constants taking in account the
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* object type. It is used to make sure types are not coerced (e.g., float and
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* complex) _and_ to distinguish 0.0 from -0.0 e.g. on IEEE platforms
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*
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* Return (type(obj), obj, ...): a tuple with variable size (at least 2 items)
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* depending on the type and the value. The type is the first item to not
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* compare bytes and str which can raise a BytesWarning exception. */
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PyAPI_FUNC(PyObject*) _PyCode_ConstantKey(PyObject *obj);
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#endif
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PyAPI_FUNC(PyObject*) PyCode_Optimize(PyObject *code, PyObject* consts,
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PyObject *names, PyObject *lnotab);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_CODE_H */
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#endif /* Py_LIMITED_API */
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