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#ifndef Py_INTERNAL_CFG_H #define Py_INTERNAL_CFG_H #ifdef __cplusplus extern "C" { #endif #ifndef Py_BUILD_CORE # error "this header requires Py_BUILD_CORE define" #endif #include "pycore_opcode_utils.h" #include "pycore_compile.h" typedef struct { int i_opcode; int i_oparg; _PyCompilerSrcLocation i_loc; struct _PyCfgBasicblock_ *i_target; /* target block (if jump instruction) */ struct _PyCfgBasicblock_ *i_except; /* target block when exception is raised */ } _PyCfgInstruction; typedef struct { int id; } _PyCfgJumpTargetLabel; typedef struct { struct _PyCfgBasicblock_ *handlers[CO_MAXBLOCKS+2]; int depth; } _PyCfgExceptStack; typedef struct _PyCfgBasicblock_ { /* Each basicblock in a compilation unit is linked via b_list in the reverse order that the block are allocated. b_list points to the next block in this list, not to be confused with b_next, which is next by control flow. */ struct _PyCfgBasicblock_ *b_list; /* The label of this block if it is a jump target, -1 otherwise */ _PyCfgJumpTargetLabel b_label; /* Exception stack at start of block, used by assembler to create the exception handling table */ _PyCfgExceptStack *b_exceptstack; /* pointer to an array of instructions, initially NULL */ _PyCfgInstruction *b_instr; /* If b_next is non-NULL, it is a pointer to the next block reached by normal control flow. */ struct _PyCfgBasicblock_ *b_next; /* number of instructions used */ int b_iused; /* length of instruction array (b_instr) */ int b_ialloc; /* Used by add_checks_for_loads_of_unknown_variables */ uint64_t b_unsafe_locals_mask; /* Number of predecessors that a block has. */ int b_predecessors; /* depth of stack upon entry of block, computed by stackdepth() */ int b_startdepth; /* instruction offset for block, computed by assemble_jump_offsets() */ int b_offset; /* Basic block is an exception handler that preserves lasti */ unsigned b_preserve_lasti : 1; /* Used by compiler passes to mark whether they have visited a basic block. */ unsigned b_visited : 1; /* b_except_handler is used by the cold-detection algorithm to mark exception targets */ unsigned b_except_handler : 1; /* b_cold is true if this block is not perf critical (like an exception handler) */ unsigned b_cold : 1; /* b_warm is used by the cold-detection algorithm to mark blocks which are definitely not cold */ unsigned b_warm : 1; } _PyCfgBasicblock; int _PyBasicblock_InsertInstruction(_PyCfgBasicblock *block, int pos, _PyCfgInstruction *instr); typedef struct cfg_builder_ { /* The entryblock, at which control flow begins. All blocks of the CFG are reachable through the b_next links */ _PyCfgBasicblock *g_entryblock; /* Pointer to the most recently allocated block. By following b_list links, you can reach all allocated blocks. */ _PyCfgBasicblock *g_block_list; /* pointer to the block currently being constructed */ _PyCfgBasicblock *g_curblock; /* label for the next instruction to be placed */ _PyCfgJumpTargetLabel g_current_label; } _PyCfgBuilder; int _PyCfgBuilder_UseLabel(_PyCfgBuilder *g, _PyCfgJumpTargetLabel lbl); int _PyCfgBuilder_Addop(_PyCfgBuilder *g, int opcode, int oparg, _PyCompilerSrcLocation loc); int _PyCfgBuilder_Init(_PyCfgBuilder *g); void _PyCfgBuilder_Fini(_PyCfgBuilder *g); _PyCfgInstruction* _PyCfg_BasicblockLastInstr(const _PyCfgBasicblock *b); int _PyCfg_OptimizeCodeUnit(_PyCfgBuilder *g, PyObject *consts, PyObject *const_cache, int code_flags, int nlocals, int nparams, int firstlineno); int _PyCfg_Stackdepth(_PyCfgBasicblock *entryblock, int code_flags); void _PyCfg_ConvertPseudoOps(_PyCfgBasicblock *entryblock); int _PyCfg_ResolveJumps(_PyCfgBuilder *g); static inline int basicblock_nofallthrough(const _PyCfgBasicblock *b) { _PyCfgInstruction *last = _PyCfg_BasicblockLastInstr(b); return (last && (IS_SCOPE_EXIT_OPCODE(last->i_opcode) || IS_UNCONDITIONAL_JUMP_OPCODE(last->i_opcode))); } #define BB_NO_FALLTHROUGH(B) (basicblock_nofallthrough(B)) #define BB_HAS_FALLTHROUGH(B) (!basicblock_nofallthrough(B)) PyCodeObject * _PyAssemble_MakeCodeObject(_PyCompile_CodeUnitMetadata *u, PyObject *const_cache, PyObject *consts, int maxdepth, _PyCompile_InstructionSequence *instrs, int nlocalsplus, int code_flags, PyObject *filename); #ifdef __cplusplus } #endif #endif /* !Py_INTERNAL_CFG_H */
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