Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file compiles an abstract syntax tree (AST) into Python bytecode. |
| 3 | * |
| 4 | * The primary entry point is PyAST_Compile(), which returns a |
| 5 | * PyCodeObject. The compiler makes several passes to build the code |
| 6 | * object: |
| 7 | * 1. Checks for future statements. See future.c |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 8 | * 2. Builds a symbol table. See symtable.c. |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 9 | * 3. Generate code for basic blocks. See compiler_mod() in this file. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 10 | * 4. Assemble the basic blocks into final code. See assemble() in |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 11 | * this file. |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 12 | * 5. Optimize the byte code (peephole optimizations). See peephole.c |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 13 | * |
| 14 | * Note that compiler_mod() suggests module, but the module ast type |
| 15 | * (mod_ty) has cases for expressions and interactive statements. |
Nick Coghlan | 944d3eb | 2005-11-16 12:46:55 +0000 | [diff] [blame] | 16 | * |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 17 | * CAUTION: The VISIT_* macros abort the current function when they |
| 18 | * encounter a problem. So don't invoke them when there is memory |
| 19 | * which needs to be released. Code blocks are OK, as the compiler |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 20 | * structure takes care of releasing those. Use the arena to manage |
| 21 | * objects. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 22 | */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 23 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 24 | #include "Python.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 25 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 26 | #include "Python-ast.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 27 | #include "node.h" |
Neal Norwitz | adb69fc | 2005-12-17 20:54:49 +0000 | [diff] [blame] | 28 | #include "pyarena.h" |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 29 | #include "ast.h" |
| 30 | #include "code.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 31 | #include "compile.h" |
Jeremy Hylton | 4b38da6 | 2001-02-02 18:19:15 +0000 | [diff] [blame] | 32 | #include "symtable.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 33 | #include "opcode.h" |
Guido van Rossum | b05a5c7 | 1997-05-07 17:46:13 +0000 | [diff] [blame] | 34 | |
Guido van Rossum | 8e793d9 | 1997-03-03 19:13:14 +0000 | [diff] [blame] | 35 | int Py_OptimizeFlag = 0; |
| 36 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 37 | #define DEFAULT_BLOCK_SIZE 16 |
| 38 | #define DEFAULT_BLOCKS 8 |
| 39 | #define DEFAULT_CODE_SIZE 128 |
| 40 | #define DEFAULT_LNOTAB_SIZE 16 |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 41 | |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 42 | #define COMP_GENEXP 0 |
| 43 | #define COMP_SETCOMP 1 |
| 44 | #define COMP_DICTCOMP 2 |
| 45 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 46 | struct instr { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 47 | unsigned i_jabs : 1; |
| 48 | unsigned i_jrel : 1; |
| 49 | unsigned i_hasarg : 1; |
| 50 | unsigned char i_opcode; |
| 51 | int i_oparg; |
| 52 | struct basicblock_ *i_target; /* target block (if jump instruction) */ |
| 53 | int i_lineno; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 54 | }; |
| 55 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 56 | typedef struct basicblock_ { |
Jeremy Hylton | 12603c4 | 2006-04-01 16:18:02 +0000 | [diff] [blame] | 57 | /* Each basicblock in a compilation unit is linked via b_list in the |
| 58 | reverse order that the block are allocated. b_list points to the next |
| 59 | block, not to be confused with b_next, which is next by control flow. */ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 60 | struct basicblock_ *b_list; |
| 61 | /* number of instructions used */ |
| 62 | int b_iused; |
| 63 | /* length of instruction array (b_instr) */ |
| 64 | int b_ialloc; |
| 65 | /* pointer to an array of instructions, initially NULL */ |
| 66 | struct instr *b_instr; |
| 67 | /* If b_next is non-NULL, it is a pointer to the next |
| 68 | block reached by normal control flow. */ |
| 69 | struct basicblock_ *b_next; |
| 70 | /* b_seen is used to perform a DFS of basicblocks. */ |
| 71 | unsigned b_seen : 1; |
| 72 | /* b_return is true if a RETURN_VALUE opcode is inserted. */ |
| 73 | unsigned b_return : 1; |
| 74 | /* depth of stack upon entry of block, computed by stackdepth() */ |
| 75 | int b_startdepth; |
| 76 | /* instruction offset for block, computed by assemble_jump_offsets() */ |
| 77 | int b_offset; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 78 | } basicblock; |
| 79 | |
| 80 | /* fblockinfo tracks the current frame block. |
| 81 | |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 82 | A frame block is used to handle loops, try/except, and try/finally. |
| 83 | It's called a frame block to distinguish it from a basic block in the |
| 84 | compiler IR. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 85 | */ |
| 86 | |
| 87 | enum fblocktype { LOOP, EXCEPT, FINALLY_TRY, FINALLY_END }; |
| 88 | |
| 89 | struct fblockinfo { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 90 | enum fblocktype fb_type; |
| 91 | basicblock *fb_block; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | /* The following items change on entry and exit of code blocks. |
| 95 | They must be saved and restored when returning to a block. |
| 96 | */ |
| 97 | struct compiler_unit { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 98 | PySTEntryObject *u_ste; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 99 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 100 | PyObject *u_name; |
| 101 | /* The following fields are dicts that map objects to |
| 102 | the index of them in co_XXX. The index is used as |
| 103 | the argument for opcodes that refer to those collections. |
| 104 | */ |
| 105 | PyObject *u_consts; /* all constants */ |
| 106 | PyObject *u_names; /* all names */ |
| 107 | PyObject *u_varnames; /* local variables */ |
| 108 | PyObject *u_cellvars; /* cell variables */ |
| 109 | PyObject *u_freevars; /* free variables */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 110 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 111 | PyObject *u_private; /* for private name mangling */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 112 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 113 | int u_argcount; /* number of arguments for block */ |
| 114 | /* Pointer to the most recently allocated block. By following b_list |
| 115 | members, you can reach all early allocated blocks. */ |
| 116 | basicblock *u_blocks; |
| 117 | basicblock *u_curblock; /* pointer to current block */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 118 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 119 | int u_nfblocks; |
| 120 | struct fblockinfo u_fblock[CO_MAXBLOCKS]; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 121 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 122 | int u_firstlineno; /* the first lineno of the block */ |
| 123 | int u_lineno; /* the lineno for the current stmt */ |
| 124 | bool u_lineno_set; /* boolean to indicate whether instr |
| 125 | has been generated with current lineno */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 126 | }; |
| 127 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 128 | /* This struct captures the global state of a compilation. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 129 | |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 130 | The u pointer points to the current compilation unit, while units |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 131 | for enclosing blocks are stored in c_stack. The u and c_stack are |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 132 | managed by compiler_enter_scope() and compiler_exit_scope(). |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 133 | */ |
| 134 | |
| 135 | struct compiler { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 136 | const char *c_filename; |
| 137 | struct symtable *c_st; |
| 138 | PyFutureFeatures *c_future; /* pointer to module's __future__ */ |
| 139 | PyCompilerFlags *c_flags; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 140 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 141 | int c_interactive; /* true if in interactive mode */ |
| 142 | int c_nestlevel; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 143 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 144 | struct compiler_unit *u; /* compiler state for current block */ |
| 145 | PyObject *c_stack; /* Python list holding compiler_unit ptrs */ |
| 146 | PyArena *c_arena; /* pointer to memory allocation arena */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 147 | }; |
| 148 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 149 | static int compiler_enter_scope(struct compiler *, identifier, void *, int); |
| 150 | static void compiler_free(struct compiler *); |
| 151 | static basicblock *compiler_new_block(struct compiler *); |
| 152 | static int compiler_next_instr(struct compiler *, basicblock *); |
| 153 | static int compiler_addop(struct compiler *, int); |
| 154 | static int compiler_addop_o(struct compiler *, int, PyObject *, PyObject *); |
| 155 | static int compiler_addop_i(struct compiler *, int, int); |
| 156 | static int compiler_addop_j(struct compiler *, int, basicblock *, int); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 157 | static basicblock *compiler_use_new_block(struct compiler *); |
| 158 | static int compiler_error(struct compiler *, const char *); |
| 159 | static int compiler_nameop(struct compiler *, identifier, expr_context_ty); |
| 160 | |
| 161 | static PyCodeObject *compiler_mod(struct compiler *, mod_ty); |
| 162 | static int compiler_visit_stmt(struct compiler *, stmt_ty); |
| 163 | static int compiler_visit_keyword(struct compiler *, keyword_ty); |
| 164 | static int compiler_visit_expr(struct compiler *, expr_ty); |
| 165 | static int compiler_augassign(struct compiler *, stmt_ty); |
| 166 | static int compiler_visit_slice(struct compiler *, slice_ty, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 167 | expr_context_ty); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 168 | |
| 169 | static int compiler_push_fblock(struct compiler *, enum fblocktype, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 170 | basicblock *); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 171 | static void compiler_pop_fblock(struct compiler *, enum fblocktype, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 172 | basicblock *); |
Jeremy Hylton | 82271f1 | 2006-10-04 02:24:52 +0000 | [diff] [blame] | 173 | /* Returns true if there is a loop on the fblock stack. */ |
| 174 | static int compiler_in_loop(struct compiler *); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 175 | |
| 176 | static int inplace_binop(struct compiler *, operator_ty); |
| 177 | static int expr_constant(expr_ty e); |
| 178 | |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 179 | static int compiler_with(struct compiler *, stmt_ty); |
| 180 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 181 | static PyCodeObject *assemble(struct compiler *, int addNone); |
| 182 | static PyObject *__doc__; |
| 183 | |
Larry Hastings | 402b73f | 2010-03-25 00:54:54 +0000 | [diff] [blame] | 184 | #define COMPILER_CAPSULE_NAME_COMPILER_UNIT "compile.c compiler unit" |
| 185 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 186 | PyObject * |
Anthony Baxter | 7b782b6 | 2006-04-11 12:01:56 +0000 | [diff] [blame] | 187 | _Py_Mangle(PyObject *privateobj, PyObject *ident) |
Michael W. Hudson | 6093462 | 2004-08-12 17:56:29 +0000 | [diff] [blame] | 188 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 189 | /* Name mangling: __private becomes _classname__private. |
| 190 | This is independent from how the name is used. */ |
| 191 | const char *p, *name = PyString_AsString(ident); |
| 192 | char *buffer; |
| 193 | size_t nlen, plen; |
| 194 | if (privateobj == NULL || !PyString_Check(privateobj) || |
| 195 | name == NULL || name[0] != '_' || name[1] != '_') { |
| 196 | Py_INCREF(ident); |
| 197 | return ident; |
| 198 | } |
| 199 | p = PyString_AsString(privateobj); |
| 200 | nlen = strlen(name); |
| 201 | /* Don't mangle __id__ or names with dots. |
Jeremy Hylton | 37075c5 | 2007-02-27 01:01:59 +0000 | [diff] [blame] | 202 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 203 | The only time a name with a dot can occur is when |
| 204 | we are compiling an import statement that has a |
| 205 | package name. |
Jeremy Hylton | 37075c5 | 2007-02-27 01:01:59 +0000 | [diff] [blame] | 206 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 207 | TODO(jhylton): Decide whether we want to support |
| 208 | mangling of the module name, e.g. __M.X. |
| 209 | */ |
| 210 | if ((name[nlen-1] == '_' && name[nlen-2] == '_') |
| 211 | || strchr(name, '.')) { |
| 212 | Py_INCREF(ident); |
| 213 | return ident; /* Don't mangle __whatever__ */ |
| 214 | } |
| 215 | /* Strip leading underscores from class name */ |
| 216 | while (*p == '_') |
| 217 | p++; |
| 218 | if (*p == '\0') { |
| 219 | Py_INCREF(ident); |
| 220 | return ident; /* Don't mangle if class is just underscores */ |
| 221 | } |
| 222 | plen = strlen(p); |
Gregory P. Smith | 9d53457 | 2008-06-11 07:41:16 +0000 | [diff] [blame] | 223 | |
Antoine Pitrou | 022db59 | 2013-04-06 21:21:04 +0200 | [diff] [blame] | 224 | if (plen + nlen >= PY_SSIZE_T_MAX - 1) { |
| 225 | PyErr_SetString(PyExc_OverflowError, |
| 226 | "private identifier too large to be mangled"); |
| 227 | return NULL; |
| 228 | } |
Gregory P. Smith | 9d53457 | 2008-06-11 07:41:16 +0000 | [diff] [blame] | 229 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 230 | ident = PyString_FromStringAndSize(NULL, 1 + nlen + plen); |
| 231 | if (!ident) |
| 232 | return 0; |
| 233 | /* ident = "_" + p[:plen] + name # i.e. 1+plen+nlen bytes */ |
| 234 | buffer = PyString_AS_STRING(ident); |
| 235 | buffer[0] = '_'; |
| 236 | strncpy(buffer+1, p, plen); |
| 237 | strcpy(buffer+1+plen, name); |
| 238 | return ident; |
Michael W. Hudson | 6093462 | 2004-08-12 17:56:29 +0000 | [diff] [blame] | 239 | } |
| 240 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 241 | static int |
| 242 | compiler_init(struct compiler *c) |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 243 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 244 | memset(c, 0, sizeof(struct compiler)); |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 245 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 246 | c->c_stack = PyList_New(0); |
| 247 | if (!c->c_stack) |
| 248 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 249 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 250 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | PyCodeObject * |
Neal Norwitz | adb69fc | 2005-12-17 20:54:49 +0000 | [diff] [blame] | 254 | PyAST_Compile(mod_ty mod, const char *filename, PyCompilerFlags *flags, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 255 | PyArena *arena) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 256 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 257 | struct compiler c; |
| 258 | PyCodeObject *co = NULL; |
| 259 | PyCompilerFlags local_flags; |
| 260 | int merged; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 261 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 262 | if (!__doc__) { |
| 263 | __doc__ = PyString_InternFromString("__doc__"); |
| 264 | if (!__doc__) |
| 265 | return NULL; |
| 266 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 267 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 268 | if (!compiler_init(&c)) |
| 269 | return NULL; |
| 270 | c.c_filename = filename; |
| 271 | c.c_arena = arena; |
| 272 | c.c_future = PyFuture_FromAST(mod, filename); |
| 273 | if (c.c_future == NULL) |
| 274 | goto finally; |
| 275 | if (!flags) { |
| 276 | local_flags.cf_flags = 0; |
| 277 | flags = &local_flags; |
| 278 | } |
| 279 | merged = c.c_future->ff_features | flags->cf_flags; |
| 280 | c.c_future->ff_features = merged; |
| 281 | flags->cf_flags = merged; |
| 282 | c.c_flags = flags; |
| 283 | c.c_nestlevel = 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 284 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 285 | c.c_st = PySymtable_Build(mod, filename, c.c_future); |
| 286 | if (c.c_st == NULL) { |
| 287 | if (!PyErr_Occurred()) |
| 288 | PyErr_SetString(PyExc_SystemError, "no symtable"); |
| 289 | goto finally; |
| 290 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 291 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 292 | co = compiler_mod(&c, mod); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 293 | |
Thomas Wouters | 1175c43 | 2006-02-27 22:49:54 +0000 | [diff] [blame] | 294 | finally: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 295 | compiler_free(&c); |
| 296 | assert(co || PyErr_Occurred()); |
| 297 | return co; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | PyCodeObject * |
| 301 | PyNode_Compile(struct _node *n, const char *filename) |
| 302 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 303 | PyCodeObject *co = NULL; |
| 304 | mod_ty mod; |
| 305 | PyArena *arena = PyArena_New(); |
| 306 | if (!arena) |
| 307 | return NULL; |
| 308 | mod = PyAST_FromNode(n, NULL, filename, arena); |
| 309 | if (mod) |
| 310 | co = PyAST_Compile(mod, filename, NULL, arena); |
| 311 | PyArena_Free(arena); |
| 312 | return co; |
Guido van Rossum | bea18cc | 2002-06-14 20:41:17 +0000 | [diff] [blame] | 313 | } |
| 314 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 315 | static void |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 316 | compiler_free(struct compiler *c) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 317 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 318 | if (c->c_st) |
| 319 | PySymtable_Free(c->c_st); |
| 320 | if (c->c_future) |
| 321 | PyObject_Free(c->c_future); |
| 322 | Py_DECREF(c->c_stack); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 323 | } |
| 324 | |
Guido van Rossum | 79f25d9 | 1997-04-29 20:08:16 +0000 | [diff] [blame] | 325 | static PyObject * |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 326 | list2dict(PyObject *list) |
Guido van Rossum | 2dff991 | 1992-09-03 20:50:59 +0000 | [diff] [blame] | 327 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 328 | Py_ssize_t i, n; |
| 329 | PyObject *v, *k; |
| 330 | PyObject *dict = PyDict_New(); |
| 331 | if (!dict) return NULL; |
Guido van Rossum | d076c73 | 1998-10-07 19:42:25 +0000 | [diff] [blame] | 332 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 333 | n = PyList_Size(list); |
| 334 | for (i = 0; i < n; i++) { |
| 335 | v = PyInt_FromLong(i); |
| 336 | if (!v) { |
| 337 | Py_DECREF(dict); |
| 338 | return NULL; |
| 339 | } |
| 340 | k = PyList_GET_ITEM(list, i); |
Victor Stinner | 7791165 | 2016-01-22 12:33:12 +0100 | [diff] [blame] | 341 | k = _PyCode_ConstantKey(k); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 342 | if (k == NULL || PyDict_SetItem(dict, k, v) < 0) { |
| 343 | Py_XDECREF(k); |
| 344 | Py_DECREF(v); |
| 345 | Py_DECREF(dict); |
| 346 | return NULL; |
| 347 | } |
| 348 | Py_DECREF(k); |
| 349 | Py_DECREF(v); |
| 350 | } |
| 351 | return dict; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | /* Return new dict containing names from src that match scope(s). |
| 355 | |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 356 | src is a symbol table dictionary. If the scope of a name matches |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 357 | either scope_type or flag is set, insert it into the new dict. The |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 358 | values are integers, starting at offset and increasing by one for |
| 359 | each key. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 360 | */ |
| 361 | |
| 362 | static PyObject * |
| 363 | dictbytype(PyObject *src, int scope_type, int flag, int offset) |
| 364 | { |
Meador Inge | 0e3755e | 2012-07-18 17:48:34 -0500 | [diff] [blame] | 365 | Py_ssize_t i = offset, scope, num_keys, key_i; |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 366 | PyObject *k, *v, *dest = PyDict_New(); |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 367 | PyObject *sorted_keys; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 368 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 369 | assert(offset >= 0); |
| 370 | if (dest == NULL) |
| 371 | return NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 372 | |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 373 | /* Sort the keys so that we have a deterministic order on the indexes |
| 374 | saved in the returned dictionary. These indexes are used as indexes |
| 375 | into the free and cell var storage. Therefore if they aren't |
| 376 | deterministic, then the generated bytecode is not deterministic. |
| 377 | */ |
| 378 | sorted_keys = PyDict_Keys(src); |
| 379 | if (sorted_keys == NULL) |
| 380 | return NULL; |
| 381 | if (PyList_Sort(sorted_keys) != 0) { |
| 382 | Py_DECREF(sorted_keys); |
| 383 | return NULL; |
| 384 | } |
Meador Inge | b8a5690 | 2012-07-18 16:32:37 -0500 | [diff] [blame] | 385 | num_keys = PyList_GET_SIZE(sorted_keys); |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 386 | |
| 387 | for (key_i = 0; key_i < num_keys; key_i++) { |
| 388 | k = PyList_GET_ITEM(sorted_keys, key_i); |
| 389 | v = PyDict_GetItem(src, k); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 390 | /* XXX this should probably be a macro in symtable.h */ |
| 391 | assert(PyInt_Check(v)); |
| 392 | scope = (PyInt_AS_LONG(v) >> SCOPE_OFF) & SCOPE_MASK; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 393 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 394 | if (scope == scope_type || PyInt_AS_LONG(v) & flag) { |
| 395 | PyObject *tuple, *item = PyInt_FromLong(i); |
| 396 | if (item == NULL) { |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 397 | Py_DECREF(sorted_keys); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 398 | Py_DECREF(dest); |
| 399 | return NULL; |
| 400 | } |
| 401 | i++; |
Victor Stinner | 7791165 | 2016-01-22 12:33:12 +0100 | [diff] [blame] | 402 | tuple = _PyCode_ConstantKey(k); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 403 | if (!tuple || PyDict_SetItem(dest, tuple, item) < 0) { |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 404 | Py_DECREF(sorted_keys); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 405 | Py_DECREF(item); |
| 406 | Py_DECREF(dest); |
| 407 | Py_XDECREF(tuple); |
| 408 | return NULL; |
| 409 | } |
| 410 | Py_DECREF(item); |
| 411 | Py_DECREF(tuple); |
| 412 | } |
| 413 | } |
Meador Inge | 6642d1f | 2012-07-18 14:09:04 -0500 | [diff] [blame] | 414 | Py_DECREF(sorted_keys); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 415 | return dest; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 418 | static void |
| 419 | compiler_unit_check(struct compiler_unit *u) |
| 420 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 421 | basicblock *block; |
| 422 | for (block = u->u_blocks; block != NULL; block = block->b_list) { |
| 423 | assert((void *)block != (void *)0xcbcbcbcb); |
| 424 | assert((void *)block != (void *)0xfbfbfbfb); |
| 425 | assert((void *)block != (void *)0xdbdbdbdb); |
| 426 | if (block->b_instr != NULL) { |
| 427 | assert(block->b_ialloc > 0); |
| 428 | assert(block->b_iused > 0); |
| 429 | assert(block->b_ialloc >= block->b_iused); |
| 430 | } |
| 431 | else { |
| 432 | assert (block->b_iused == 0); |
| 433 | assert (block->b_ialloc == 0); |
| 434 | } |
| 435 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | static void |
| 439 | compiler_unit_free(struct compiler_unit *u) |
| 440 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 441 | basicblock *b, *next; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 442 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 443 | compiler_unit_check(u); |
| 444 | b = u->u_blocks; |
| 445 | while (b != NULL) { |
| 446 | if (b->b_instr) |
| 447 | PyObject_Free((void *)b->b_instr); |
| 448 | next = b->b_list; |
| 449 | PyObject_Free((void *)b); |
| 450 | b = next; |
| 451 | } |
| 452 | Py_CLEAR(u->u_ste); |
| 453 | Py_CLEAR(u->u_name); |
| 454 | Py_CLEAR(u->u_consts); |
| 455 | Py_CLEAR(u->u_names); |
| 456 | Py_CLEAR(u->u_varnames); |
| 457 | Py_CLEAR(u->u_freevars); |
| 458 | Py_CLEAR(u->u_cellvars); |
| 459 | Py_CLEAR(u->u_private); |
| 460 | PyObject_Free(u); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | static int |
| 464 | compiler_enter_scope(struct compiler *c, identifier name, void *key, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 465 | int lineno) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 466 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 467 | struct compiler_unit *u; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 468 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 469 | u = (struct compiler_unit *)PyObject_Malloc(sizeof( |
| 470 | struct compiler_unit)); |
| 471 | if (!u) { |
| 472 | PyErr_NoMemory(); |
| 473 | return 0; |
| 474 | } |
| 475 | memset(u, 0, sizeof(struct compiler_unit)); |
| 476 | u->u_argcount = 0; |
| 477 | u->u_ste = PySymtable_Lookup(c->c_st, key); |
| 478 | if (!u->u_ste) { |
| 479 | compiler_unit_free(u); |
| 480 | return 0; |
| 481 | } |
| 482 | Py_INCREF(name); |
| 483 | u->u_name = name; |
| 484 | u->u_varnames = list2dict(u->u_ste->ste_varnames); |
| 485 | u->u_cellvars = dictbytype(u->u_ste->ste_symbols, CELL, 0, 0); |
| 486 | if (!u->u_varnames || !u->u_cellvars) { |
| 487 | compiler_unit_free(u); |
| 488 | return 0; |
| 489 | } |
Neal Norwitz | d12bd01 | 2006-07-21 07:59:47 +0000 | [diff] [blame] | 490 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 491 | u->u_freevars = dictbytype(u->u_ste->ste_symbols, FREE, DEF_FREE_CLASS, |
| 492 | PyDict_Size(u->u_cellvars)); |
| 493 | if (!u->u_freevars) { |
| 494 | compiler_unit_free(u); |
| 495 | return 0; |
| 496 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 497 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 498 | u->u_blocks = NULL; |
| 499 | u->u_nfblocks = 0; |
| 500 | u->u_firstlineno = lineno; |
| 501 | u->u_lineno = 0; |
| 502 | u->u_lineno_set = false; |
| 503 | u->u_consts = PyDict_New(); |
| 504 | if (!u->u_consts) { |
| 505 | compiler_unit_free(u); |
| 506 | return 0; |
| 507 | } |
| 508 | u->u_names = PyDict_New(); |
| 509 | if (!u->u_names) { |
| 510 | compiler_unit_free(u); |
| 511 | return 0; |
| 512 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 513 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 514 | u->u_private = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 515 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 516 | /* Push the old compiler_unit on the stack. */ |
| 517 | if (c->u) { |
| 518 | PyObject *capsule = PyCapsule_New(c->u, COMPILER_CAPSULE_NAME_COMPILER_UNIT, NULL); |
| 519 | if (!capsule || PyList_Append(c->c_stack, capsule) < 0) { |
| 520 | Py_XDECREF(capsule); |
| 521 | compiler_unit_free(u); |
| 522 | return 0; |
| 523 | } |
| 524 | Py_DECREF(capsule); |
| 525 | u->u_private = c->u->u_private; |
| 526 | Py_XINCREF(u->u_private); |
| 527 | } |
| 528 | c->u = u; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 529 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 530 | c->c_nestlevel++; |
| 531 | if (compiler_use_new_block(c) == NULL) |
| 532 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 533 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 534 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 535 | } |
| 536 | |
Neil Schemenauer | c396d9e | 2005-10-25 06:30:14 +0000 | [diff] [blame] | 537 | static void |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 538 | compiler_exit_scope(struct compiler *c) |
| 539 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 540 | int n; |
| 541 | PyObject *capsule; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 542 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 543 | c->c_nestlevel--; |
| 544 | compiler_unit_free(c->u); |
| 545 | /* Restore c->u to the parent unit. */ |
| 546 | n = PyList_GET_SIZE(c->c_stack) - 1; |
| 547 | if (n >= 0) { |
| 548 | capsule = PyList_GET_ITEM(c->c_stack, n); |
| 549 | c->u = (struct compiler_unit *)PyCapsule_GetPointer(capsule, COMPILER_CAPSULE_NAME_COMPILER_UNIT); |
| 550 | assert(c->u); |
| 551 | /* we are deleting from a list so this really shouldn't fail */ |
| 552 | if (PySequence_DelItem(c->c_stack, n) < 0) |
| 553 | Py_FatalError("compiler_exit_scope()"); |
| 554 | compiler_unit_check(c->u); |
| 555 | } |
| 556 | else |
| 557 | c->u = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 558 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | /* Allocate a new block and return a pointer to it. |
| 562 | Returns NULL on error. |
| 563 | */ |
| 564 | |
| 565 | static basicblock * |
| 566 | compiler_new_block(struct compiler *c) |
| 567 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 568 | basicblock *b; |
| 569 | struct compiler_unit *u; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 570 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 571 | u = c->u; |
| 572 | b = (basicblock *)PyObject_Malloc(sizeof(basicblock)); |
| 573 | if (b == NULL) { |
| 574 | PyErr_NoMemory(); |
| 575 | return NULL; |
| 576 | } |
| 577 | memset((void *)b, 0, sizeof(basicblock)); |
| 578 | /* Extend the singly linked list of blocks with new block. */ |
| 579 | b->b_list = u->u_blocks; |
| 580 | u->u_blocks = b; |
| 581 | return b; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 582 | } |
| 583 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 584 | static basicblock * |
| 585 | compiler_use_new_block(struct compiler *c) |
| 586 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 587 | basicblock *block = compiler_new_block(c); |
| 588 | if (block == NULL) |
| 589 | return NULL; |
| 590 | c->u->u_curblock = block; |
| 591 | return block; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | static basicblock * |
| 595 | compiler_next_block(struct compiler *c) |
| 596 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 597 | basicblock *block = compiler_new_block(c); |
| 598 | if (block == NULL) |
| 599 | return NULL; |
| 600 | c->u->u_curblock->b_next = block; |
| 601 | c->u->u_curblock = block; |
| 602 | return block; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | static basicblock * |
| 606 | compiler_use_next_block(struct compiler *c, basicblock *block) |
| 607 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 608 | assert(block != NULL); |
| 609 | c->u->u_curblock->b_next = block; |
| 610 | c->u->u_curblock = block; |
| 611 | return block; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 612 | } |
| 613 | |
| 614 | /* Returns the offset of the next instruction in the current block's |
| 615 | b_instr array. Resizes the b_instr as necessary. |
| 616 | Returns -1 on failure. |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 617 | */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 618 | |
| 619 | static int |
| 620 | compiler_next_instr(struct compiler *c, basicblock *b) |
| 621 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 622 | assert(b != NULL); |
| 623 | if (b->b_instr == NULL) { |
| 624 | b->b_instr = (struct instr *)PyObject_Malloc( |
| 625 | sizeof(struct instr) * DEFAULT_BLOCK_SIZE); |
| 626 | if (b->b_instr == NULL) { |
| 627 | PyErr_NoMemory(); |
| 628 | return -1; |
| 629 | } |
| 630 | b->b_ialloc = DEFAULT_BLOCK_SIZE; |
| 631 | memset((char *)b->b_instr, 0, |
| 632 | sizeof(struct instr) * DEFAULT_BLOCK_SIZE); |
| 633 | } |
| 634 | else if (b->b_iused == b->b_ialloc) { |
| 635 | struct instr *tmp; |
| 636 | size_t oldsize, newsize; |
| 637 | oldsize = b->b_ialloc * sizeof(struct instr); |
| 638 | newsize = oldsize << 1; |
Gregory P. Smith | 9d53457 | 2008-06-11 07:41:16 +0000 | [diff] [blame] | 639 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 640 | if (oldsize > (PY_SIZE_MAX >> 1)) { |
| 641 | PyErr_NoMemory(); |
| 642 | return -1; |
| 643 | } |
Gregory P. Smith | 9d53457 | 2008-06-11 07:41:16 +0000 | [diff] [blame] | 644 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 645 | if (newsize == 0) { |
| 646 | PyErr_NoMemory(); |
| 647 | return -1; |
| 648 | } |
| 649 | b->b_ialloc <<= 1; |
| 650 | tmp = (struct instr *)PyObject_Realloc( |
| 651 | (void *)b->b_instr, newsize); |
| 652 | if (tmp == NULL) { |
| 653 | PyErr_NoMemory(); |
| 654 | return -1; |
| 655 | } |
| 656 | b->b_instr = tmp; |
| 657 | memset((char *)b->b_instr + oldsize, 0, newsize - oldsize); |
| 658 | } |
| 659 | return b->b_iused++; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 660 | } |
| 661 | |
Amaury Forgeot d'Arc | 6fd03bb | 2008-02-04 21:45:05 +0000 | [diff] [blame] | 662 | /* Set the i_lineno member of the instruction at offset off if the |
| 663 | line number for the current expression/statement has not |
Jeremy Hylton | 12603c4 | 2006-04-01 16:18:02 +0000 | [diff] [blame] | 664 | already been set. If it has been set, the call has no effect. |
| 665 | |
Amaury Forgeot d'Arc | 6fd03bb | 2008-02-04 21:45:05 +0000 | [diff] [blame] | 666 | The line number is reset in the following cases: |
| 667 | - when entering a new scope |
| 668 | - on each statement |
| 669 | - on each expression that start a new line |
| 670 | - before the "except" clause |
| 671 | - before the "for" and "while" expressions |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 672 | */ |
Jeremy Hylton | 12603c4 | 2006-04-01 16:18:02 +0000 | [diff] [blame] | 673 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 674 | static void |
| 675 | compiler_set_lineno(struct compiler *c, int off) |
| 676 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 677 | basicblock *b; |
| 678 | if (c->u->u_lineno_set) |
| 679 | return; |
| 680 | c->u->u_lineno_set = true; |
| 681 | b = c->u->u_curblock; |
| 682 | b->b_instr[off].i_lineno = c->u->u_lineno; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 683 | } |
| 684 | |
| 685 | static int |
| 686 | opcode_stack_effect(int opcode, int oparg) |
| 687 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 688 | switch (opcode) { |
| 689 | case POP_TOP: |
| 690 | return -1; |
| 691 | case ROT_TWO: |
| 692 | case ROT_THREE: |
| 693 | return 0; |
| 694 | case DUP_TOP: |
| 695 | return 1; |
| 696 | case ROT_FOUR: |
| 697 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 698 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 699 | case UNARY_POSITIVE: |
| 700 | case UNARY_NEGATIVE: |
| 701 | case UNARY_NOT: |
| 702 | case UNARY_CONVERT: |
| 703 | case UNARY_INVERT: |
| 704 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 705 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 706 | case SET_ADD: |
| 707 | case LIST_APPEND: |
| 708 | return -1; |
Neal Norwitz | 10be2ea | 2006-03-03 20:29:11 +0000 | [diff] [blame] | 709 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 710 | case MAP_ADD: |
| 711 | return -2; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 712 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 713 | case BINARY_POWER: |
| 714 | case BINARY_MULTIPLY: |
| 715 | case BINARY_DIVIDE: |
| 716 | case BINARY_MODULO: |
| 717 | case BINARY_ADD: |
| 718 | case BINARY_SUBTRACT: |
| 719 | case BINARY_SUBSCR: |
| 720 | case BINARY_FLOOR_DIVIDE: |
| 721 | case BINARY_TRUE_DIVIDE: |
| 722 | return -1; |
| 723 | case INPLACE_FLOOR_DIVIDE: |
| 724 | case INPLACE_TRUE_DIVIDE: |
| 725 | return -1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 726 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 727 | case SLICE+0: |
| 728 | return 0; |
| 729 | case SLICE+1: |
| 730 | return -1; |
| 731 | case SLICE+2: |
| 732 | return -1; |
| 733 | case SLICE+3: |
| 734 | return -2; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 735 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 736 | case STORE_SLICE+0: |
| 737 | return -2; |
| 738 | case STORE_SLICE+1: |
| 739 | return -3; |
| 740 | case STORE_SLICE+2: |
| 741 | return -3; |
| 742 | case STORE_SLICE+3: |
| 743 | return -4; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 744 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 745 | case DELETE_SLICE+0: |
| 746 | return -1; |
| 747 | case DELETE_SLICE+1: |
| 748 | return -2; |
| 749 | case DELETE_SLICE+2: |
| 750 | return -2; |
| 751 | case DELETE_SLICE+3: |
| 752 | return -3; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 753 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 754 | case INPLACE_ADD: |
| 755 | case INPLACE_SUBTRACT: |
| 756 | case INPLACE_MULTIPLY: |
| 757 | case INPLACE_DIVIDE: |
| 758 | case INPLACE_MODULO: |
| 759 | return -1; |
| 760 | case STORE_SUBSCR: |
| 761 | return -3; |
| 762 | case STORE_MAP: |
| 763 | return -2; |
| 764 | case DELETE_SUBSCR: |
| 765 | return -2; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 766 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 767 | case BINARY_LSHIFT: |
| 768 | case BINARY_RSHIFT: |
| 769 | case BINARY_AND: |
| 770 | case BINARY_XOR: |
| 771 | case BINARY_OR: |
| 772 | return -1; |
| 773 | case INPLACE_POWER: |
| 774 | return -1; |
| 775 | case GET_ITER: |
| 776 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 777 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 778 | case PRINT_EXPR: |
| 779 | return -1; |
| 780 | case PRINT_ITEM: |
| 781 | return -1; |
| 782 | case PRINT_NEWLINE: |
| 783 | return 0; |
| 784 | case PRINT_ITEM_TO: |
| 785 | return -2; |
| 786 | case PRINT_NEWLINE_TO: |
| 787 | return -1; |
| 788 | case INPLACE_LSHIFT: |
| 789 | case INPLACE_RSHIFT: |
| 790 | case INPLACE_AND: |
| 791 | case INPLACE_XOR: |
| 792 | case INPLACE_OR: |
| 793 | return -1; |
| 794 | case BREAK_LOOP: |
| 795 | return 0; |
| 796 | case SETUP_WITH: |
| 797 | return 4; |
| 798 | case WITH_CLEANUP: |
| 799 | return -1; /* XXX Sometimes more */ |
| 800 | case LOAD_LOCALS: |
| 801 | return 1; |
| 802 | case RETURN_VALUE: |
| 803 | return -1; |
| 804 | case IMPORT_STAR: |
| 805 | return -1; |
| 806 | case EXEC_STMT: |
| 807 | return -3; |
| 808 | case YIELD_VALUE: |
| 809 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 810 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 811 | case POP_BLOCK: |
| 812 | return 0; |
| 813 | case END_FINALLY: |
| 814 | return -3; /* or -1 or -2 if no exception occurred or |
| 815 | return/break/continue */ |
| 816 | case BUILD_CLASS: |
| 817 | return -2; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 818 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 819 | case STORE_NAME: |
| 820 | return -1; |
| 821 | case DELETE_NAME: |
| 822 | return 0; |
| 823 | case UNPACK_SEQUENCE: |
| 824 | return oparg-1; |
| 825 | case FOR_ITER: |
| 826 | return 1; /* or -1, at end of iterator */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 827 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 828 | case STORE_ATTR: |
| 829 | return -2; |
| 830 | case DELETE_ATTR: |
| 831 | return -1; |
| 832 | case STORE_GLOBAL: |
| 833 | return -1; |
| 834 | case DELETE_GLOBAL: |
| 835 | return 0; |
| 836 | case DUP_TOPX: |
| 837 | return oparg; |
| 838 | case LOAD_CONST: |
| 839 | return 1; |
| 840 | case LOAD_NAME: |
| 841 | return 1; |
| 842 | case BUILD_TUPLE: |
| 843 | case BUILD_LIST: |
| 844 | case BUILD_SET: |
| 845 | return 1-oparg; |
| 846 | case BUILD_MAP: |
| 847 | return 1; |
| 848 | case LOAD_ATTR: |
| 849 | return 0; |
| 850 | case COMPARE_OP: |
| 851 | return -1; |
| 852 | case IMPORT_NAME: |
| 853 | return -1; |
| 854 | case IMPORT_FROM: |
| 855 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 856 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 857 | case JUMP_FORWARD: |
| 858 | case JUMP_IF_TRUE_OR_POP: /* -1 if jump not taken */ |
| 859 | case JUMP_IF_FALSE_OR_POP: /* "" */ |
| 860 | case JUMP_ABSOLUTE: |
| 861 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 862 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 863 | case POP_JUMP_IF_FALSE: |
| 864 | case POP_JUMP_IF_TRUE: |
| 865 | return -1; |
Jeffrey Yasskin | 68d6852 | 2009-02-28 19:03:21 +0000 | [diff] [blame] | 866 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 867 | case LOAD_GLOBAL: |
| 868 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 869 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 870 | case CONTINUE_LOOP: |
| 871 | return 0; |
| 872 | case SETUP_LOOP: |
| 873 | case SETUP_EXCEPT: |
| 874 | case SETUP_FINALLY: |
| 875 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 876 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 877 | case LOAD_FAST: |
| 878 | return 1; |
| 879 | case STORE_FAST: |
| 880 | return -1; |
| 881 | case DELETE_FAST: |
| 882 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 883 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 884 | case RAISE_VARARGS: |
| 885 | return -oparg; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 886 | #define NARGS(o) (((o) % 256) + 2*((o) / 256)) |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 887 | case CALL_FUNCTION: |
| 888 | return -NARGS(oparg); |
| 889 | case CALL_FUNCTION_VAR: |
| 890 | case CALL_FUNCTION_KW: |
| 891 | return -NARGS(oparg)-1; |
| 892 | case CALL_FUNCTION_VAR_KW: |
| 893 | return -NARGS(oparg)-2; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 894 | #undef NARGS |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 895 | case MAKE_FUNCTION: |
| 896 | return -oparg; |
| 897 | case BUILD_SLICE: |
| 898 | if (oparg == 3) |
| 899 | return -2; |
| 900 | else |
| 901 | return -1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 902 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 903 | case MAKE_CLOSURE: |
| 904 | return -oparg-1; |
| 905 | case LOAD_CLOSURE: |
| 906 | return 1; |
| 907 | case LOAD_DEREF: |
| 908 | return 1; |
| 909 | case STORE_DEREF: |
| 910 | return -1; |
| 911 | default: |
| 912 | fprintf(stderr, "opcode = %d\n", opcode); |
| 913 | Py_FatalError("opcode_stack_effect()"); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 914 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 915 | } |
| 916 | return 0; /* not reachable */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 917 | } |
| 918 | |
| 919 | /* Add an opcode with no argument. |
| 920 | Returns 0 on failure, 1 on success. |
| 921 | */ |
| 922 | |
| 923 | static int |
| 924 | compiler_addop(struct compiler *c, int opcode) |
| 925 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 926 | basicblock *b; |
| 927 | struct instr *i; |
| 928 | int off; |
| 929 | off = compiler_next_instr(c, c->u->u_curblock); |
| 930 | if (off < 0) |
| 931 | return 0; |
| 932 | b = c->u->u_curblock; |
| 933 | i = &b->b_instr[off]; |
| 934 | i->i_opcode = opcode; |
| 935 | i->i_hasarg = 0; |
| 936 | if (opcode == RETURN_VALUE) |
| 937 | b->b_return = 1; |
| 938 | compiler_set_lineno(c, off); |
| 939 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 940 | } |
| 941 | |
| 942 | static int |
| 943 | compiler_add_o(struct compiler *c, PyObject *dict, PyObject *o) |
| 944 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 945 | PyObject *t, *v; |
| 946 | Py_ssize_t arg; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 947 | |
Victor Stinner | 7791165 | 2016-01-22 12:33:12 +0100 | [diff] [blame] | 948 | t = _PyCode_ConstantKey(o); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 949 | if (t == NULL) |
| 950 | return -1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 951 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 952 | v = PyDict_GetItem(dict, t); |
| 953 | if (!v) { |
| 954 | arg = PyDict_Size(dict); |
| 955 | v = PyInt_FromLong(arg); |
| 956 | if (!v) { |
| 957 | Py_DECREF(t); |
| 958 | return -1; |
| 959 | } |
| 960 | if (PyDict_SetItem(dict, t, v) < 0) { |
| 961 | Py_DECREF(t); |
| 962 | Py_DECREF(v); |
| 963 | return -1; |
| 964 | } |
| 965 | Py_DECREF(v); |
| 966 | } |
| 967 | else |
| 968 | arg = PyInt_AsLong(v); |
| 969 | Py_DECREF(t); |
| 970 | return arg; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | static int |
| 974 | compiler_addop_o(struct compiler *c, int opcode, PyObject *dict, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 975 | PyObject *o) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 976 | { |
| 977 | int arg = compiler_add_o(c, dict, o); |
| 978 | if (arg < 0) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 979 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 980 | return compiler_addop_i(c, opcode, arg); |
| 981 | } |
| 982 | |
| 983 | static int |
| 984 | compiler_addop_name(struct compiler *c, int opcode, PyObject *dict, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 985 | PyObject *o) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 986 | { |
| 987 | int arg; |
| 988 | PyObject *mangled = _Py_Mangle(c->u->u_private, o); |
| 989 | if (!mangled) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 990 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 991 | arg = compiler_add_o(c, dict, mangled); |
| 992 | Py_DECREF(mangled); |
| 993 | if (arg < 0) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 994 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 995 | return compiler_addop_i(c, opcode, arg); |
| 996 | } |
| 997 | |
| 998 | /* Add an opcode with an integer argument. |
| 999 | Returns 0 on failure, 1 on success. |
| 1000 | */ |
| 1001 | |
| 1002 | static int |
| 1003 | compiler_addop_i(struct compiler *c, int opcode, int oparg) |
| 1004 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1005 | struct instr *i; |
| 1006 | int off; |
| 1007 | off = compiler_next_instr(c, c->u->u_curblock); |
| 1008 | if (off < 0) |
| 1009 | return 0; |
| 1010 | i = &c->u->u_curblock->b_instr[off]; |
| 1011 | i->i_opcode = opcode; |
| 1012 | i->i_oparg = oparg; |
| 1013 | i->i_hasarg = 1; |
| 1014 | compiler_set_lineno(c, off); |
| 1015 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | static int |
| 1019 | compiler_addop_j(struct compiler *c, int opcode, basicblock *b, int absolute) |
| 1020 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1021 | struct instr *i; |
| 1022 | int off; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1023 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1024 | assert(b != NULL); |
| 1025 | off = compiler_next_instr(c, c->u->u_curblock); |
| 1026 | if (off < 0) |
| 1027 | return 0; |
| 1028 | i = &c->u->u_curblock->b_instr[off]; |
| 1029 | i->i_opcode = opcode; |
| 1030 | i->i_target = b; |
| 1031 | i->i_hasarg = 1; |
| 1032 | if (absolute) |
| 1033 | i->i_jabs = 1; |
| 1034 | else |
| 1035 | i->i_jrel = 1; |
| 1036 | compiler_set_lineno(c, off); |
| 1037 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1038 | } |
| 1039 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1040 | /* The distinction between NEW_BLOCK and NEXT_BLOCK is subtle. (I'd |
| 1041 | like to find better names.) NEW_BLOCK() creates a new block and sets |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1042 | it as the current block. NEXT_BLOCK() also creates an implicit jump |
| 1043 | from the current block to the new block. |
| 1044 | */ |
| 1045 | |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 1046 | /* The returns inside these macros make it impossible to decref objects |
| 1047 | created in the local function. Local objects should use the arena. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1048 | */ |
| 1049 | |
| 1050 | |
| 1051 | #define NEW_BLOCK(C) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1052 | if (compiler_use_new_block((C)) == NULL) \ |
| 1053 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | #define NEXT_BLOCK(C) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1057 | if (compiler_next_block((C)) == NULL) \ |
| 1058 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1059 | } |
| 1060 | |
| 1061 | #define ADDOP(C, OP) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1062 | if (!compiler_addop((C), (OP))) \ |
| 1063 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1064 | } |
| 1065 | |
Neal Norwitz | b6fc9df | 2005-11-13 18:50:34 +0000 | [diff] [blame] | 1066 | #define ADDOP_IN_SCOPE(C, OP) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1067 | if (!compiler_addop((C), (OP))) { \ |
| 1068 | compiler_exit_scope(c); \ |
| 1069 | return 0; \ |
| 1070 | } \ |
Neal Norwitz | b6fc9df | 2005-11-13 18:50:34 +0000 | [diff] [blame] | 1071 | } |
| 1072 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1073 | #define ADDOP_O(C, OP, O, TYPE) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1074 | if (!compiler_addop_o((C), (OP), (C)->u->u_ ## TYPE, (O))) \ |
| 1075 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1076 | } |
| 1077 | |
| 1078 | #define ADDOP_NAME(C, OP, O, TYPE) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1079 | if (!compiler_addop_name((C), (OP), (C)->u->u_ ## TYPE, (O))) \ |
| 1080 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1081 | } |
| 1082 | |
| 1083 | #define ADDOP_I(C, OP, O) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1084 | if (!compiler_addop_i((C), (OP), (O))) \ |
| 1085 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1086 | } |
| 1087 | |
| 1088 | #define ADDOP_JABS(C, OP, O) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1089 | if (!compiler_addop_j((C), (OP), (O), 1)) \ |
| 1090 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | #define ADDOP_JREL(C, OP, O) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1094 | if (!compiler_addop_j((C), (OP), (O), 0)) \ |
| 1095 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | /* VISIT and VISIT_SEQ takes an ASDL type as their second argument. They use |
| 1099 | the ASDL name to synthesize the name of the C type and the visit function. |
| 1100 | */ |
| 1101 | |
| 1102 | #define VISIT(C, TYPE, V) {\ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1103 | if (!compiler_visit_ ## TYPE((C), (V))) \ |
| 1104 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1105 | } |
| 1106 | |
Neal Norwitz | b6fc9df | 2005-11-13 18:50:34 +0000 | [diff] [blame] | 1107 | #define VISIT_IN_SCOPE(C, TYPE, V) {\ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1108 | if (!compiler_visit_ ## TYPE((C), (V))) { \ |
| 1109 | compiler_exit_scope(c); \ |
| 1110 | return 0; \ |
| 1111 | } \ |
Neal Norwitz | b6fc9df | 2005-11-13 18:50:34 +0000 | [diff] [blame] | 1112 | } |
| 1113 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1114 | #define VISIT_SLICE(C, V, CTX) {\ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1115 | if (!compiler_visit_slice((C), (V), (CTX))) \ |
| 1116 | return 0; \ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | #define VISIT_SEQ(C, TYPE, SEQ) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1120 | int _i; \ |
| 1121 | asdl_seq *seq = (SEQ); /* avoid variable capture */ \ |
| 1122 | for (_i = 0; _i < asdl_seq_LEN(seq); _i++) { \ |
| 1123 | TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, _i); \ |
| 1124 | if (!compiler_visit_ ## TYPE((C), elt)) \ |
| 1125 | return 0; \ |
| 1126 | } \ |
Anthony Baxter | 7b782b6 | 2006-04-11 12:01:56 +0000 | [diff] [blame] | 1127 | } |
| 1128 | |
Neal Norwitz | b6fc9df | 2005-11-13 18:50:34 +0000 | [diff] [blame] | 1129 | #define VISIT_SEQ_IN_SCOPE(C, TYPE, SEQ) { \ |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1130 | int _i; \ |
| 1131 | asdl_seq *seq = (SEQ); /* avoid variable capture */ \ |
| 1132 | for (_i = 0; _i < asdl_seq_LEN(seq); _i++) { \ |
| 1133 | TYPE ## _ty elt = (TYPE ## _ty)asdl_seq_GET(seq, _i); \ |
| 1134 | if (!compiler_visit_ ## TYPE((C), elt)) { \ |
| 1135 | compiler_exit_scope(c); \ |
| 1136 | return 0; \ |
| 1137 | } \ |
| 1138 | } \ |
Anthony Baxter | 7b782b6 | 2006-04-11 12:01:56 +0000 | [diff] [blame] | 1139 | } |
| 1140 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1141 | static int |
| 1142 | compiler_isdocstring(stmt_ty s) |
| 1143 | { |
| 1144 | if (s->kind != Expr_kind) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 1145 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1146 | return s->v.Expr.value->kind == Str_kind; |
| 1147 | } |
| 1148 | |
| 1149 | /* Compile a sequence of statements, checking for a docstring. */ |
| 1150 | |
| 1151 | static int |
| 1152 | compiler_body(struct compiler *c, asdl_seq *stmts) |
| 1153 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1154 | int i = 0; |
| 1155 | stmt_ty st; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1156 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1157 | if (!asdl_seq_LEN(stmts)) |
| 1158 | return 1; |
| 1159 | st = (stmt_ty)asdl_seq_GET(stmts, 0); |
| 1160 | if (compiler_isdocstring(st) && Py_OptimizeFlag < 2) { |
| 1161 | /* don't generate docstrings if -OO */ |
| 1162 | i = 1; |
| 1163 | VISIT(c, expr, st->v.Expr.value); |
| 1164 | if (!compiler_nameop(c, __doc__, Store)) |
| 1165 | return 0; |
| 1166 | } |
| 1167 | for (; i < asdl_seq_LEN(stmts); i++) |
| 1168 | VISIT(c, stmt, (stmt_ty)asdl_seq_GET(stmts, i)); |
| 1169 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | static PyCodeObject * |
| 1173 | compiler_mod(struct compiler *c, mod_ty mod) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1174 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1175 | PyCodeObject *co; |
| 1176 | int addNone = 1; |
| 1177 | static PyObject *module; |
| 1178 | if (!module) { |
| 1179 | module = PyString_InternFromString("<module>"); |
| 1180 | if (!module) |
| 1181 | return NULL; |
| 1182 | } |
| 1183 | /* Use 0 for firstlineno initially, will fixup in assemble(). */ |
| 1184 | if (!compiler_enter_scope(c, module, mod, 0)) |
| 1185 | return NULL; |
| 1186 | switch (mod->kind) { |
| 1187 | case Module_kind: |
| 1188 | if (!compiler_body(c, mod->v.Module.body)) { |
| 1189 | compiler_exit_scope(c); |
| 1190 | return 0; |
| 1191 | } |
| 1192 | break; |
| 1193 | case Interactive_kind: |
| 1194 | c->c_interactive = 1; |
| 1195 | VISIT_SEQ_IN_SCOPE(c, stmt, |
| 1196 | mod->v.Interactive.body); |
| 1197 | break; |
| 1198 | case Expression_kind: |
| 1199 | VISIT_IN_SCOPE(c, expr, mod->v.Expression.body); |
| 1200 | addNone = 0; |
| 1201 | break; |
| 1202 | case Suite_kind: |
| 1203 | PyErr_SetString(PyExc_SystemError, |
| 1204 | "suite should not be possible"); |
| 1205 | return 0; |
| 1206 | default: |
| 1207 | PyErr_Format(PyExc_SystemError, |
| 1208 | "module kind %d should not be possible", |
| 1209 | mod->kind); |
| 1210 | return 0; |
| 1211 | } |
| 1212 | co = assemble(c, addNone); |
| 1213 | compiler_exit_scope(c); |
| 1214 | return co; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1215 | } |
| 1216 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1217 | /* The test for LOCAL must come before the test for FREE in order to |
| 1218 | handle classes where name is both local and free. The local var is |
| 1219 | a method and the free var is a free var referenced within a method. |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 1220 | */ |
| 1221 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1222 | static int |
| 1223 | get_ref_type(struct compiler *c, PyObject *name) |
| 1224 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1225 | int scope = PyST_GetScope(c->u->u_ste, name); |
| 1226 | if (scope == 0) { |
| 1227 | char buf[350]; |
| 1228 | PyOS_snprintf(buf, sizeof(buf), |
| 1229 | "unknown scope for %.100s in %.100s(%s) in %s\n" |
| 1230 | "symbols: %s\nlocals: %s\nglobals: %s", |
| 1231 | PyString_AS_STRING(name), |
| 1232 | PyString_AS_STRING(c->u->u_name), |
Serhiy Storchaka | a86c091 | 2014-11-19 00:11:05 +0200 | [diff] [blame] | 1233 | PyString_AS_STRING(PyObject_Repr(c->u->u_ste->ste_id)), |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1234 | c->c_filename, |
Serhiy Storchaka | a86c091 | 2014-11-19 00:11:05 +0200 | [diff] [blame] | 1235 | PyString_AS_STRING(PyObject_Repr(c->u->u_ste->ste_symbols)), |
| 1236 | PyString_AS_STRING(PyObject_Repr(c->u->u_varnames)), |
| 1237 | PyString_AS_STRING(PyObject_Repr(c->u->u_names)) |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1238 | ); |
| 1239 | Py_FatalError(buf); |
| 1240 | } |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 1241 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1242 | return scope; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1243 | } |
| 1244 | |
| 1245 | static int |
| 1246 | compiler_lookup_arg(PyObject *dict, PyObject *name) |
| 1247 | { |
| 1248 | PyObject *k, *v; |
Victor Stinner | 7791165 | 2016-01-22 12:33:12 +0100 | [diff] [blame] | 1249 | k = _PyCode_ConstantKey(name); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1250 | if (k == NULL) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 1251 | return -1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1252 | v = PyDict_GetItem(dict, k); |
Neal Norwitz | 3715c3e | 2005-11-24 22:09:18 +0000 | [diff] [blame] | 1253 | Py_DECREF(k); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1254 | if (v == NULL) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 1255 | return -1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1256 | return PyInt_AS_LONG(v); |
| 1257 | } |
| 1258 | |
| 1259 | static int |
| 1260 | compiler_make_closure(struct compiler *c, PyCodeObject *co, int args) |
| 1261 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1262 | int i, free = PyCode_GetNumFree(co); |
| 1263 | if (free == 0) { |
| 1264 | ADDOP_O(c, LOAD_CONST, (PyObject*)co, consts); |
| 1265 | ADDOP_I(c, MAKE_FUNCTION, args); |
| 1266 | return 1; |
| 1267 | } |
| 1268 | for (i = 0; i < free; ++i) { |
| 1269 | /* Bypass com_addop_varname because it will generate |
| 1270 | LOAD_DEREF but LOAD_CLOSURE is needed. |
| 1271 | */ |
| 1272 | PyObject *name = PyTuple_GET_ITEM(co->co_freevars, i); |
| 1273 | int arg, reftype; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1274 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1275 | /* Special case: If a class contains a method with a |
| 1276 | free variable that has the same name as a method, |
| 1277 | the name will be considered free *and* local in the |
| 1278 | class. It should be handled by the closure, as |
| 1279 | well as by the normal name loookup logic. |
| 1280 | */ |
| 1281 | reftype = get_ref_type(c, name); |
| 1282 | if (reftype == CELL) |
| 1283 | arg = compiler_lookup_arg(c->u->u_cellvars, name); |
| 1284 | else /* (reftype == FREE) */ |
| 1285 | arg = compiler_lookup_arg(c->u->u_freevars, name); |
| 1286 | if (arg == -1) { |
| 1287 | printf("lookup %s in %s %d %d\n" |
| 1288 | "freevars of %s: %s\n", |
Serhiy Storchaka | a86c091 | 2014-11-19 00:11:05 +0200 | [diff] [blame] | 1289 | PyString_AS_STRING(PyObject_Repr(name)), |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1290 | PyString_AS_STRING(c->u->u_name), |
| 1291 | reftype, arg, |
| 1292 | PyString_AS_STRING(co->co_name), |
Serhiy Storchaka | a86c091 | 2014-11-19 00:11:05 +0200 | [diff] [blame] | 1293 | PyString_AS_STRING(PyObject_Repr(co->co_freevars))); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1294 | Py_FatalError("compiler_make_closure()"); |
| 1295 | } |
| 1296 | ADDOP_I(c, LOAD_CLOSURE, arg); |
| 1297 | } |
| 1298 | ADDOP_I(c, BUILD_TUPLE, free); |
| 1299 | ADDOP_O(c, LOAD_CONST, (PyObject*)co, consts); |
| 1300 | ADDOP_I(c, MAKE_CLOSURE, args); |
| 1301 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1302 | } |
| 1303 | |
| 1304 | static int |
| 1305 | compiler_decorators(struct compiler *c, asdl_seq* decos) |
| 1306 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1307 | int i; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1308 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1309 | if (!decos) |
| 1310 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1311 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1312 | for (i = 0; i < asdl_seq_LEN(decos); i++) { |
| 1313 | VISIT(c, expr, (expr_ty)asdl_seq_GET(decos, i)); |
| 1314 | } |
| 1315 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1316 | } |
| 1317 | |
| 1318 | static int |
| 1319 | compiler_arguments(struct compiler *c, arguments_ty args) |
| 1320 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1321 | int i; |
| 1322 | int n = asdl_seq_LEN(args->args); |
| 1323 | /* Correctly handle nested argument lists */ |
| 1324 | for (i = 0; i < n; i++) { |
| 1325 | expr_ty arg = (expr_ty)asdl_seq_GET(args->args, i); |
| 1326 | if (arg->kind == Tuple_kind) { |
| 1327 | PyObject *id = PyString_FromFormat(".%d", i); |
| 1328 | if (id == NULL) { |
| 1329 | return 0; |
| 1330 | } |
| 1331 | if (!compiler_nameop(c, id, Load)) { |
| 1332 | Py_DECREF(id); |
| 1333 | return 0; |
| 1334 | } |
| 1335 | Py_DECREF(id); |
| 1336 | VISIT(c, expr, arg); |
| 1337 | } |
| 1338 | } |
| 1339 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1340 | } |
| 1341 | |
| 1342 | static int |
| 1343 | compiler_function(struct compiler *c, stmt_ty s) |
| 1344 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1345 | PyCodeObject *co; |
| 1346 | PyObject *first_const = Py_None; |
| 1347 | arguments_ty args = s->v.FunctionDef.args; |
| 1348 | asdl_seq* decos = s->v.FunctionDef.decorator_list; |
| 1349 | stmt_ty st; |
| 1350 | int i, n, docstring; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1351 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1352 | assert(s->kind == FunctionDef_kind); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1353 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1354 | if (!compiler_decorators(c, decos)) |
| 1355 | return 0; |
| 1356 | if (args->defaults) |
| 1357 | VISIT_SEQ(c, expr, args->defaults); |
| 1358 | if (!compiler_enter_scope(c, s->v.FunctionDef.name, (void *)s, |
| 1359 | s->lineno)) |
| 1360 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1361 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1362 | st = (stmt_ty)asdl_seq_GET(s->v.FunctionDef.body, 0); |
| 1363 | docstring = compiler_isdocstring(st); |
| 1364 | if (docstring && Py_OptimizeFlag < 2) |
| 1365 | first_const = st->v.Expr.value->v.Str.s; |
| 1366 | if (compiler_add_o(c, c->u->u_consts, first_const) < 0) { |
| 1367 | compiler_exit_scope(c); |
| 1368 | return 0; |
| 1369 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1370 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1371 | /* unpack nested arguments */ |
| 1372 | compiler_arguments(c, args); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1373 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1374 | c->u->u_argcount = asdl_seq_LEN(args->args); |
| 1375 | n = asdl_seq_LEN(s->v.FunctionDef.body); |
| 1376 | /* if there was a docstring, we need to skip the first statement */ |
| 1377 | for (i = docstring; i < n; i++) { |
| 1378 | st = (stmt_ty)asdl_seq_GET(s->v.FunctionDef.body, i); |
| 1379 | VISIT_IN_SCOPE(c, stmt, st); |
| 1380 | } |
| 1381 | co = assemble(c, 1); |
| 1382 | compiler_exit_scope(c); |
| 1383 | if (co == NULL) |
| 1384 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1385 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1386 | compiler_make_closure(c, co, asdl_seq_LEN(args->defaults)); |
| 1387 | Py_DECREF(co); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1388 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1389 | for (i = 0; i < asdl_seq_LEN(decos); i++) { |
| 1390 | ADDOP_I(c, CALL_FUNCTION, 1); |
| 1391 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1392 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1393 | return compiler_nameop(c, s->v.FunctionDef.name, Store); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1394 | } |
| 1395 | |
| 1396 | static int |
| 1397 | compiler_class(struct compiler *c, stmt_ty s) |
| 1398 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1399 | int n, i; |
| 1400 | PyCodeObject *co; |
| 1401 | PyObject *str; |
| 1402 | asdl_seq* decos = s->v.ClassDef.decorator_list; |
Christian Heimes | 5224d28 | 2008-02-23 15:01:05 +0000 | [diff] [blame] | 1403 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1404 | if (!compiler_decorators(c, decos)) |
| 1405 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1406 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1407 | /* push class name on stack, needed by BUILD_CLASS */ |
| 1408 | ADDOP_O(c, LOAD_CONST, s->v.ClassDef.name, consts); |
| 1409 | /* push the tuple of base classes on the stack */ |
| 1410 | n = asdl_seq_LEN(s->v.ClassDef.bases); |
| 1411 | if (n > 0) |
| 1412 | VISIT_SEQ(c, expr, s->v.ClassDef.bases); |
| 1413 | ADDOP_I(c, BUILD_TUPLE, n); |
| 1414 | if (!compiler_enter_scope(c, s->v.ClassDef.name, (void *)s, |
| 1415 | s->lineno)) |
| 1416 | return 0; |
Serhiy Storchaka | 5951f23 | 2015-12-24 10:35:35 +0200 | [diff] [blame] | 1417 | Py_INCREF(s->v.ClassDef.name); |
Serhiy Storchaka | bc62af1 | 2016-04-06 09:51:18 +0300 | [diff] [blame] | 1418 | Py_XSETREF(c->u->u_private, s->v.ClassDef.name); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1419 | str = PyString_InternFromString("__name__"); |
| 1420 | if (!str || !compiler_nameop(c, str, Load)) { |
| 1421 | Py_XDECREF(str); |
| 1422 | compiler_exit_scope(c); |
| 1423 | return 0; |
| 1424 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1425 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1426 | Py_DECREF(str); |
| 1427 | str = PyString_InternFromString("__module__"); |
| 1428 | if (!str || !compiler_nameop(c, str, Store)) { |
| 1429 | Py_XDECREF(str); |
| 1430 | compiler_exit_scope(c); |
| 1431 | return 0; |
| 1432 | } |
| 1433 | Py_DECREF(str); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1434 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1435 | if (!compiler_body(c, s->v.ClassDef.body)) { |
| 1436 | compiler_exit_scope(c); |
| 1437 | return 0; |
| 1438 | } |
Neal Norwitz | 4737b23 | 2005-11-19 23:58:29 +0000 | [diff] [blame] | 1439 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1440 | ADDOP_IN_SCOPE(c, LOAD_LOCALS); |
| 1441 | ADDOP_IN_SCOPE(c, RETURN_VALUE); |
| 1442 | co = assemble(c, 1); |
| 1443 | compiler_exit_scope(c); |
| 1444 | if (co == NULL) |
| 1445 | return 0; |
| 1446 | |
| 1447 | compiler_make_closure(c, co, 0); |
| 1448 | Py_DECREF(co); |
| 1449 | |
| 1450 | ADDOP_I(c, CALL_FUNCTION, 0); |
| 1451 | ADDOP(c, BUILD_CLASS); |
| 1452 | /* apply decorators */ |
| 1453 | for (i = 0; i < asdl_seq_LEN(decos); i++) { |
| 1454 | ADDOP_I(c, CALL_FUNCTION, 1); |
| 1455 | } |
| 1456 | if (!compiler_nameop(c, s->v.ClassDef.name, Store)) |
| 1457 | return 0; |
| 1458 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | static int |
Thomas Wouters | dca3b9c | 2006-02-27 00:24:13 +0000 | [diff] [blame] | 1462 | compiler_ifexp(struct compiler *c, expr_ty e) |
| 1463 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1464 | basicblock *end, *next; |
| 1465 | |
| 1466 | assert(e->kind == IfExp_kind); |
| 1467 | end = compiler_new_block(c); |
| 1468 | if (end == NULL) |
| 1469 | return 0; |
| 1470 | next = compiler_new_block(c); |
| 1471 | if (next == NULL) |
| 1472 | return 0; |
| 1473 | VISIT(c, expr, e->v.IfExp.test); |
| 1474 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, next); |
| 1475 | VISIT(c, expr, e->v.IfExp.body); |
| 1476 | ADDOP_JREL(c, JUMP_FORWARD, end); |
| 1477 | compiler_use_next_block(c, next); |
| 1478 | VISIT(c, expr, e->v.IfExp.orelse); |
| 1479 | compiler_use_next_block(c, end); |
| 1480 | return 1; |
Thomas Wouters | dca3b9c | 2006-02-27 00:24:13 +0000 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1484 | compiler_lambda(struct compiler *c, expr_ty e) |
| 1485 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1486 | PyCodeObject *co; |
| 1487 | static identifier name; |
| 1488 | arguments_ty args = e->v.Lambda.args; |
| 1489 | assert(e->kind == Lambda_kind); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1490 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1491 | if (!name) { |
| 1492 | name = PyString_InternFromString("<lambda>"); |
| 1493 | if (!name) |
| 1494 | return 0; |
| 1495 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1496 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1497 | if (args->defaults) |
| 1498 | VISIT_SEQ(c, expr, args->defaults); |
| 1499 | if (!compiler_enter_scope(c, name, (void *)e, e->lineno)) |
| 1500 | return 0; |
Neal Norwitz | 4737b23 | 2005-11-19 23:58:29 +0000 | [diff] [blame] | 1501 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1502 | /* unpack nested arguments */ |
| 1503 | compiler_arguments(c, args); |
Benjamin Peterson | 0dee9c1 | 2010-03-17 20:41:42 +0000 | [diff] [blame] | 1504 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1505 | /* Make None the first constant, so the lambda can't have a |
| 1506 | docstring. */ |
| 1507 | if (compiler_add_o(c, c->u->u_consts, Py_None) < 0) |
| 1508 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1509 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1510 | c->u->u_argcount = asdl_seq_LEN(args->args); |
| 1511 | VISIT_IN_SCOPE(c, expr, e->v.Lambda.body); |
| 1512 | if (c->u->u_ste->ste_generator) { |
| 1513 | ADDOP_IN_SCOPE(c, POP_TOP); |
| 1514 | } |
| 1515 | else { |
| 1516 | ADDOP_IN_SCOPE(c, RETURN_VALUE); |
| 1517 | } |
| 1518 | co = assemble(c, 1); |
| 1519 | compiler_exit_scope(c); |
| 1520 | if (co == NULL) |
| 1521 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1522 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1523 | compiler_make_closure(c, co, asdl_seq_LEN(args->defaults)); |
| 1524 | Py_DECREF(co); |
| 1525 | |
| 1526 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1527 | } |
| 1528 | |
| 1529 | static int |
| 1530 | compiler_print(struct compiler *c, stmt_ty s) |
| 1531 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1532 | int i, n; |
| 1533 | bool dest; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1534 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1535 | assert(s->kind == Print_kind); |
| 1536 | n = asdl_seq_LEN(s->v.Print.values); |
| 1537 | dest = false; |
| 1538 | if (s->v.Print.dest) { |
| 1539 | VISIT(c, expr, s->v.Print.dest); |
| 1540 | dest = true; |
| 1541 | } |
| 1542 | for (i = 0; i < n; i++) { |
| 1543 | expr_ty e = (expr_ty)asdl_seq_GET(s->v.Print.values, i); |
| 1544 | if (dest) { |
| 1545 | ADDOP(c, DUP_TOP); |
| 1546 | VISIT(c, expr, e); |
| 1547 | ADDOP(c, ROT_TWO); |
| 1548 | ADDOP(c, PRINT_ITEM_TO); |
| 1549 | } |
| 1550 | else { |
| 1551 | VISIT(c, expr, e); |
| 1552 | ADDOP(c, PRINT_ITEM); |
| 1553 | } |
| 1554 | } |
| 1555 | if (s->v.Print.nl) { |
| 1556 | if (dest) |
| 1557 | ADDOP(c, PRINT_NEWLINE_TO) |
| 1558 | else |
| 1559 | ADDOP(c, PRINT_NEWLINE) |
| 1560 | } |
| 1561 | else if (dest) |
| 1562 | ADDOP(c, POP_TOP); |
| 1563 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1564 | } |
| 1565 | |
| 1566 | static int |
| 1567 | compiler_if(struct compiler *c, stmt_ty s) |
| 1568 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1569 | basicblock *end, *next; |
| 1570 | int constant; |
| 1571 | assert(s->kind == If_kind); |
| 1572 | end = compiler_new_block(c); |
| 1573 | if (end == NULL) |
| 1574 | return 0; |
| 1575 | |
| 1576 | constant = expr_constant(s->v.If.test); |
| 1577 | /* constant = 0: "if 0" |
| 1578 | * constant = 1: "if 1", "if 2", ... |
| 1579 | * constant = -1: rest */ |
| 1580 | if (constant == 0) { |
| 1581 | if (s->v.If.orelse) |
| 1582 | VISIT_SEQ(c, stmt, s->v.If.orelse); |
| 1583 | } else if (constant == 1) { |
| 1584 | VISIT_SEQ(c, stmt, s->v.If.body); |
| 1585 | } else { |
| 1586 | if (s->v.If.orelse) { |
| 1587 | next = compiler_new_block(c); |
| 1588 | if (next == NULL) |
| 1589 | return 0; |
| 1590 | } |
| 1591 | else |
| 1592 | next = end; |
| 1593 | VISIT(c, expr, s->v.If.test); |
| 1594 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, next); |
| 1595 | VISIT_SEQ(c, stmt, s->v.If.body); |
| 1596 | ADDOP_JREL(c, JUMP_FORWARD, end); |
| 1597 | if (s->v.If.orelse) { |
| 1598 | compiler_use_next_block(c, next); |
| 1599 | VISIT_SEQ(c, stmt, s->v.If.orelse); |
| 1600 | } |
| 1601 | } |
| 1602 | compiler_use_next_block(c, end); |
| 1603 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1604 | } |
| 1605 | |
| 1606 | static int |
| 1607 | compiler_for(struct compiler *c, stmt_ty s) |
| 1608 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1609 | basicblock *start, *cleanup, *end; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1610 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1611 | start = compiler_new_block(c); |
| 1612 | cleanup = compiler_new_block(c); |
| 1613 | end = compiler_new_block(c); |
| 1614 | if (start == NULL || end == NULL || cleanup == NULL) |
| 1615 | return 0; |
| 1616 | ADDOP_JREL(c, SETUP_LOOP, end); |
| 1617 | if (!compiler_push_fblock(c, LOOP, start)) |
| 1618 | return 0; |
| 1619 | VISIT(c, expr, s->v.For.iter); |
| 1620 | ADDOP(c, GET_ITER); |
| 1621 | compiler_use_next_block(c, start); |
| 1622 | ADDOP_JREL(c, FOR_ITER, cleanup); |
| 1623 | VISIT(c, expr, s->v.For.target); |
| 1624 | VISIT_SEQ(c, stmt, s->v.For.body); |
| 1625 | ADDOP_JABS(c, JUMP_ABSOLUTE, start); |
| 1626 | compiler_use_next_block(c, cleanup); |
| 1627 | ADDOP(c, POP_BLOCK); |
| 1628 | compiler_pop_fblock(c, LOOP, start); |
| 1629 | VISIT_SEQ(c, stmt, s->v.For.orelse); |
| 1630 | compiler_use_next_block(c, end); |
| 1631 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1632 | } |
| 1633 | |
| 1634 | static int |
| 1635 | compiler_while(struct compiler *c, stmt_ty s) |
| 1636 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1637 | basicblock *loop, *orelse, *end, *anchor = NULL; |
| 1638 | int constant = expr_constant(s->v.While.test); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1639 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1640 | if (constant == 0) { |
| 1641 | if (s->v.While.orelse) |
| 1642 | VISIT_SEQ(c, stmt, s->v.While.orelse); |
| 1643 | return 1; |
| 1644 | } |
| 1645 | loop = compiler_new_block(c); |
| 1646 | end = compiler_new_block(c); |
| 1647 | if (constant == -1) { |
| 1648 | anchor = compiler_new_block(c); |
| 1649 | if (anchor == NULL) |
| 1650 | return 0; |
| 1651 | } |
| 1652 | if (loop == NULL || end == NULL) |
| 1653 | return 0; |
| 1654 | if (s->v.While.orelse) { |
| 1655 | orelse = compiler_new_block(c); |
| 1656 | if (orelse == NULL) |
| 1657 | return 0; |
| 1658 | } |
| 1659 | else |
| 1660 | orelse = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1661 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1662 | ADDOP_JREL(c, SETUP_LOOP, end); |
| 1663 | compiler_use_next_block(c, loop); |
| 1664 | if (!compiler_push_fblock(c, LOOP, loop)) |
| 1665 | return 0; |
| 1666 | if (constant == -1) { |
| 1667 | VISIT(c, expr, s->v.While.test); |
| 1668 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, anchor); |
| 1669 | } |
| 1670 | VISIT_SEQ(c, stmt, s->v.While.body); |
| 1671 | ADDOP_JABS(c, JUMP_ABSOLUTE, loop); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1672 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1673 | /* XXX should the two POP instructions be in a separate block |
| 1674 | if there is no else clause ? |
| 1675 | */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1676 | |
Benjamin Peterson | 7a6a973 | 2014-12-13 16:06:19 -0500 | [diff] [blame] | 1677 | if (constant == -1) |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1678 | compiler_use_next_block(c, anchor); |
Benjamin Peterson | 7a6a973 | 2014-12-13 16:06:19 -0500 | [diff] [blame] | 1679 | ADDOP(c, POP_BLOCK); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1680 | compiler_pop_fblock(c, LOOP, loop); |
| 1681 | if (orelse != NULL) /* what if orelse is just pass? */ |
| 1682 | VISIT_SEQ(c, stmt, s->v.While.orelse); |
| 1683 | compiler_use_next_block(c, end); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1684 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1685 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1686 | } |
| 1687 | |
| 1688 | static int |
| 1689 | compiler_continue(struct compiler *c) |
| 1690 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1691 | static const char LOOP_ERROR_MSG[] = "'continue' not properly in loop"; |
| 1692 | static const char IN_FINALLY_ERROR_MSG[] = |
| 1693 | "'continue' not supported inside 'finally' clause"; |
| 1694 | int i; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1695 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1696 | if (!c->u->u_nfblocks) |
| 1697 | return compiler_error(c, LOOP_ERROR_MSG); |
| 1698 | i = c->u->u_nfblocks - 1; |
| 1699 | switch (c->u->u_fblock[i].fb_type) { |
| 1700 | case LOOP: |
| 1701 | ADDOP_JABS(c, JUMP_ABSOLUTE, c->u->u_fblock[i].fb_block); |
| 1702 | break; |
| 1703 | case EXCEPT: |
| 1704 | case FINALLY_TRY: |
| 1705 | while (--i >= 0 && c->u->u_fblock[i].fb_type != LOOP) { |
| 1706 | /* Prevent continue anywhere under a finally |
| 1707 | even if hidden in a sub-try or except. */ |
| 1708 | if (c->u->u_fblock[i].fb_type == FINALLY_END) |
| 1709 | return compiler_error(c, IN_FINALLY_ERROR_MSG); |
| 1710 | } |
| 1711 | if (i == -1) |
| 1712 | return compiler_error(c, LOOP_ERROR_MSG); |
| 1713 | ADDOP_JABS(c, CONTINUE_LOOP, c->u->u_fblock[i].fb_block); |
| 1714 | break; |
| 1715 | case FINALLY_END: |
| 1716 | return compiler_error(c, IN_FINALLY_ERROR_MSG); |
| 1717 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1718 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1719 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1720 | } |
| 1721 | |
| 1722 | /* Code generated for "try: <body> finally: <finalbody>" is as follows: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1723 | |
| 1724 | SETUP_FINALLY L |
| 1725 | <code for body> |
| 1726 | POP_BLOCK |
| 1727 | LOAD_CONST <None> |
| 1728 | L: <code for finalbody> |
| 1729 | END_FINALLY |
| 1730 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1731 | The special instructions use the block stack. Each block |
| 1732 | stack entry contains the instruction that created it (here |
| 1733 | SETUP_FINALLY), the level of the value stack at the time the |
| 1734 | block stack entry was created, and a label (here L). |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1735 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1736 | SETUP_FINALLY: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1737 | Pushes the current value stack level and the label |
| 1738 | onto the block stack. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1739 | POP_BLOCK: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1740 | Pops en entry from the block stack, and pops the value |
| 1741 | stack until its level is the same as indicated on the |
| 1742 | block stack. (The label is ignored.) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1743 | END_FINALLY: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1744 | Pops a variable number of entries from the *value* stack |
| 1745 | and re-raises the exception they specify. The number of |
| 1746 | entries popped depends on the (pseudo) exception type. |
| 1747 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1748 | The block stack is unwound when an exception is raised: |
| 1749 | when a SETUP_FINALLY entry is found, the exception is pushed |
| 1750 | onto the value stack (and the exception condition is cleared), |
| 1751 | and the interpreter jumps to the label gotten from the block |
| 1752 | stack. |
| 1753 | */ |
| 1754 | |
| 1755 | static int |
| 1756 | compiler_try_finally(struct compiler *c, stmt_ty s) |
| 1757 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1758 | basicblock *body, *end; |
| 1759 | body = compiler_new_block(c); |
| 1760 | end = compiler_new_block(c); |
| 1761 | if (body == NULL || end == NULL) |
| 1762 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1763 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1764 | ADDOP_JREL(c, SETUP_FINALLY, end); |
| 1765 | compiler_use_next_block(c, body); |
| 1766 | if (!compiler_push_fblock(c, FINALLY_TRY, body)) |
| 1767 | return 0; |
| 1768 | VISIT_SEQ(c, stmt, s->v.TryFinally.body); |
| 1769 | ADDOP(c, POP_BLOCK); |
| 1770 | compiler_pop_fblock(c, FINALLY_TRY, body); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1771 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1772 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 1773 | compiler_use_next_block(c, end); |
| 1774 | if (!compiler_push_fblock(c, FINALLY_END, end)) |
| 1775 | return 0; |
| 1776 | VISIT_SEQ(c, stmt, s->v.TryFinally.finalbody); |
| 1777 | ADDOP(c, END_FINALLY); |
| 1778 | compiler_pop_fblock(c, FINALLY_END, end); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1779 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1780 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1781 | } |
| 1782 | |
| 1783 | /* |
| 1784 | Code generated for "try: S except E1, V1: S1 except E2, V2: S2 ...": |
| 1785 | (The contents of the value stack is shown in [], with the top |
| 1786 | at the right; 'tb' is trace-back info, 'val' the exception's |
| 1787 | associated value, and 'exc' the exception.) |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1788 | |
| 1789 | Value stack Label Instruction Argument |
| 1790 | [] SETUP_EXCEPT L1 |
| 1791 | [] <code for S> |
| 1792 | [] POP_BLOCK |
| 1793 | [] JUMP_FORWARD L0 |
| 1794 | |
| 1795 | [tb, val, exc] L1: DUP ) |
| 1796 | [tb, val, exc, exc] <evaluate E1> ) |
| 1797 | [tb, val, exc, exc, E1] COMPARE_OP EXC_MATCH ) only if E1 |
| 1798 | [tb, val, exc, 1-or-0] POP_JUMP_IF_FALSE L2 ) |
| 1799 | [tb, val, exc] POP |
| 1800 | [tb, val] <assign to V1> (or POP if no V1) |
| 1801 | [tb] POP |
| 1802 | [] <code for S1> |
| 1803 | JUMP_FORWARD L0 |
| 1804 | |
| 1805 | [tb, val, exc] L2: DUP |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1806 | .............................etc....................... |
| 1807 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1808 | [tb, val, exc] Ln+1: END_FINALLY # re-raise exception |
| 1809 | |
| 1810 | [] L0: <next statement> |
| 1811 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1812 | Of course, parts are not generated if Vi or Ei is not present. |
| 1813 | */ |
| 1814 | static int |
| 1815 | compiler_try_except(struct compiler *c, stmt_ty s) |
| 1816 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1817 | basicblock *body, *orelse, *except, *end; |
| 1818 | int i, n; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1819 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1820 | body = compiler_new_block(c); |
| 1821 | except = compiler_new_block(c); |
| 1822 | orelse = compiler_new_block(c); |
| 1823 | end = compiler_new_block(c); |
| 1824 | if (body == NULL || except == NULL || orelse == NULL || end == NULL) |
| 1825 | return 0; |
| 1826 | ADDOP_JREL(c, SETUP_EXCEPT, except); |
| 1827 | compiler_use_next_block(c, body); |
| 1828 | if (!compiler_push_fblock(c, EXCEPT, body)) |
| 1829 | return 0; |
| 1830 | VISIT_SEQ(c, stmt, s->v.TryExcept.body); |
| 1831 | ADDOP(c, POP_BLOCK); |
| 1832 | compiler_pop_fblock(c, EXCEPT, body); |
| 1833 | ADDOP_JREL(c, JUMP_FORWARD, orelse); |
| 1834 | n = asdl_seq_LEN(s->v.TryExcept.handlers); |
| 1835 | compiler_use_next_block(c, except); |
| 1836 | for (i = 0; i < n; i++) { |
| 1837 | excepthandler_ty handler = (excepthandler_ty)asdl_seq_GET( |
| 1838 | s->v.TryExcept.handlers, i); |
| 1839 | if (!handler->v.ExceptHandler.type && i < n-1) |
| 1840 | return compiler_error(c, "default 'except:' must be last"); |
| 1841 | c->u->u_lineno_set = false; |
| 1842 | c->u->u_lineno = handler->lineno; |
| 1843 | except = compiler_new_block(c); |
| 1844 | if (except == NULL) |
| 1845 | return 0; |
| 1846 | if (handler->v.ExceptHandler.type) { |
| 1847 | ADDOP(c, DUP_TOP); |
| 1848 | VISIT(c, expr, handler->v.ExceptHandler.type); |
| 1849 | ADDOP_I(c, COMPARE_OP, PyCmp_EXC_MATCH); |
| 1850 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, except); |
| 1851 | } |
| 1852 | ADDOP(c, POP_TOP); |
| 1853 | if (handler->v.ExceptHandler.name) { |
| 1854 | VISIT(c, expr, handler->v.ExceptHandler.name); |
| 1855 | } |
| 1856 | else { |
| 1857 | ADDOP(c, POP_TOP); |
| 1858 | } |
| 1859 | ADDOP(c, POP_TOP); |
| 1860 | VISIT_SEQ(c, stmt, handler->v.ExceptHandler.body); |
| 1861 | ADDOP_JREL(c, JUMP_FORWARD, end); |
| 1862 | compiler_use_next_block(c, except); |
| 1863 | } |
| 1864 | ADDOP(c, END_FINALLY); |
| 1865 | compiler_use_next_block(c, orelse); |
| 1866 | VISIT_SEQ(c, stmt, s->v.TryExcept.orelse); |
| 1867 | compiler_use_next_block(c, end); |
| 1868 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1869 | } |
| 1870 | |
| 1871 | static int |
| 1872 | compiler_import_as(struct compiler *c, identifier name, identifier asname) |
| 1873 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1874 | /* The IMPORT_NAME opcode was already generated. This function |
| 1875 | merely needs to bind the result to a name. |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1876 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1877 | If there is a dot in name, we need to split it and emit a |
| 1878 | LOAD_ATTR for each name. |
| 1879 | */ |
| 1880 | const char *src = PyString_AS_STRING(name); |
| 1881 | const char *dot = strchr(src, '.'); |
| 1882 | if (dot) { |
| 1883 | /* Consume the base module name to get the first attribute */ |
| 1884 | src = dot + 1; |
| 1885 | while (dot) { |
| 1886 | /* NB src is only defined when dot != NULL */ |
| 1887 | PyObject *attr; |
| 1888 | dot = strchr(src, '.'); |
| 1889 | attr = PyString_FromStringAndSize(src, |
| 1890 | dot ? dot - src : strlen(src)); |
| 1891 | if (!attr) |
Serhiy Storchaka | 34cb3f0 | 2016-06-15 20:06:29 +0300 | [diff] [blame] | 1892 | return 0; |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1893 | ADDOP_O(c, LOAD_ATTR, attr, names); |
| 1894 | Py_DECREF(attr); |
| 1895 | src = dot + 1; |
| 1896 | } |
| 1897 | } |
| 1898 | return compiler_nameop(c, asname, Store); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1899 | } |
| 1900 | |
| 1901 | static int |
| 1902 | compiler_import(struct compiler *c, stmt_ty s) |
| 1903 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1904 | /* The Import node stores a module name like a.b.c as a single |
| 1905 | string. This is convenient for all cases except |
| 1906 | import a.b.c as d |
| 1907 | where we need to parse that string to extract the individual |
| 1908 | module names. |
| 1909 | XXX Perhaps change the representation to make this case simpler? |
| 1910 | */ |
| 1911 | int i, n = asdl_seq_LEN(s->v.Import.names); |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1912 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1913 | for (i = 0; i < n; i++) { |
| 1914 | alias_ty alias = (alias_ty)asdl_seq_GET(s->v.Import.names, i); |
| 1915 | int r; |
| 1916 | PyObject *level; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1917 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1918 | if (c->c_flags && (c->c_flags->cf_flags & CO_FUTURE_ABSOLUTE_IMPORT)) |
| 1919 | level = PyInt_FromLong(0); |
| 1920 | else |
| 1921 | level = PyInt_FromLong(-1); |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1922 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1923 | if (level == NULL) |
| 1924 | return 0; |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1925 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1926 | ADDOP_O(c, LOAD_CONST, level, consts); |
| 1927 | Py_DECREF(level); |
| 1928 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 1929 | ADDOP_NAME(c, IMPORT_NAME, alias->name, names); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1930 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1931 | if (alias->asname) { |
| 1932 | r = compiler_import_as(c, alias->name, alias->asname); |
| 1933 | if (!r) |
| 1934 | return r; |
| 1935 | } |
| 1936 | else { |
| 1937 | identifier tmp = alias->name; |
| 1938 | const char *base = PyString_AS_STRING(alias->name); |
| 1939 | char *dot = strchr(base, '.'); |
Benjamin Peterson | 0287f2f | 2015-07-27 07:47:21 -0700 | [diff] [blame] | 1940 | if (dot) { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1941 | tmp = PyString_FromStringAndSize(base, |
| 1942 | dot - base); |
Benjamin Peterson | 0287f2f | 2015-07-27 07:47:21 -0700 | [diff] [blame] | 1943 | if (tmp == NULL) |
| 1944 | return 0; |
| 1945 | } |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1946 | r = compiler_nameop(c, tmp, Store); |
| 1947 | if (dot) { |
| 1948 | Py_DECREF(tmp); |
| 1949 | } |
| 1950 | if (!r) |
| 1951 | return r; |
| 1952 | } |
| 1953 | } |
| 1954 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1955 | } |
| 1956 | |
| 1957 | static int |
| 1958 | compiler_from_import(struct compiler *c, stmt_ty s) |
| 1959 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1960 | int i, n = asdl_seq_LEN(s->v.ImportFrom.names); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1961 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1962 | PyObject *names = PyTuple_New(n); |
| 1963 | PyObject *level; |
| 1964 | static PyObject *empty_string; |
Benjamin Peterson | a72be3b | 2009-06-13 20:23:33 +0000 | [diff] [blame] | 1965 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1966 | if (!empty_string) { |
| 1967 | empty_string = PyString_FromString(""); |
| 1968 | if (!empty_string) |
| 1969 | return 0; |
| 1970 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1971 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1972 | if (!names) |
| 1973 | return 0; |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1974 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1975 | if (s->v.ImportFrom.level == 0 && c->c_flags && |
| 1976 | !(c->c_flags->cf_flags & CO_FUTURE_ABSOLUTE_IMPORT)) |
| 1977 | level = PyInt_FromLong(-1); |
| 1978 | else |
| 1979 | level = PyInt_FromLong(s->v.ImportFrom.level); |
Thomas Wouters | f7f438b | 2006-02-28 16:09:29 +0000 | [diff] [blame] | 1980 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1981 | if (!level) { |
| 1982 | Py_DECREF(names); |
| 1983 | return 0; |
| 1984 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1985 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1986 | /* build up the names */ |
| 1987 | for (i = 0; i < n; i++) { |
| 1988 | alias_ty alias = (alias_ty)asdl_seq_GET(s->v.ImportFrom.names, i); |
| 1989 | Py_INCREF(alias->name); |
| 1990 | PyTuple_SET_ITEM(names, i, alias->name); |
| 1991 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 1992 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 1993 | if (s->lineno > c->c_future->ff_lineno && s->v.ImportFrom.module && |
| 1994 | !strcmp(PyString_AS_STRING(s->v.ImportFrom.module), "__future__")) { |
| 1995 | Py_DECREF(level); |
| 1996 | Py_DECREF(names); |
| 1997 | return compiler_error(c, "from __future__ imports must occur " |
| 1998 | "at the beginning of the file"); |
| 1999 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2000 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2001 | ADDOP_O(c, LOAD_CONST, level, consts); |
| 2002 | Py_DECREF(level); |
| 2003 | ADDOP_O(c, LOAD_CONST, names, consts); |
| 2004 | Py_DECREF(names); |
| 2005 | if (s->v.ImportFrom.module) { |
| 2006 | ADDOP_NAME(c, IMPORT_NAME, s->v.ImportFrom.module, names); |
| 2007 | } |
| 2008 | else { |
| 2009 | ADDOP_NAME(c, IMPORT_NAME, empty_string, names); |
| 2010 | } |
| 2011 | for (i = 0; i < n; i++) { |
| 2012 | alias_ty alias = (alias_ty)asdl_seq_GET(s->v.ImportFrom.names, i); |
| 2013 | identifier store_name; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2014 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2015 | if (i == 0 && *PyString_AS_STRING(alias->name) == '*') { |
| 2016 | assert(n == 1); |
| 2017 | ADDOP(c, IMPORT_STAR); |
| 2018 | return 1; |
| 2019 | } |
| 2020 | |
| 2021 | ADDOP_NAME(c, IMPORT_FROM, alias->name, names); |
| 2022 | store_name = alias->name; |
| 2023 | if (alias->asname) |
| 2024 | store_name = alias->asname; |
| 2025 | |
| 2026 | if (!compiler_nameop(c, store_name, Store)) { |
| 2027 | Py_DECREF(names); |
| 2028 | return 0; |
| 2029 | } |
| 2030 | } |
| 2031 | /* remove imported module */ |
| 2032 | ADDOP(c, POP_TOP); |
| 2033 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2034 | } |
| 2035 | |
| 2036 | static int |
| 2037 | compiler_assert(struct compiler *c, stmt_ty s) |
| 2038 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2039 | static PyObject *assertion_error = NULL; |
| 2040 | basicblock *end; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2041 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2042 | if (Py_OptimizeFlag) |
| 2043 | return 1; |
| 2044 | if (assertion_error == NULL) { |
| 2045 | assertion_error = PyString_InternFromString("AssertionError"); |
| 2046 | if (assertion_error == NULL) |
| 2047 | return 0; |
| 2048 | } |
| 2049 | if (s->v.Assert.test->kind == Tuple_kind && |
| 2050 | asdl_seq_LEN(s->v.Assert.test->v.Tuple.elts) > 0) { |
| 2051 | const char* msg = |
| 2052 | "assertion is always true, perhaps remove parentheses?"; |
| 2053 | if (PyErr_WarnExplicit(PyExc_SyntaxWarning, msg, c->c_filename, |
| 2054 | c->u->u_lineno, NULL, NULL) == -1) |
| 2055 | return 0; |
| 2056 | } |
| 2057 | VISIT(c, expr, s->v.Assert.test); |
| 2058 | end = compiler_new_block(c); |
| 2059 | if (end == NULL) |
| 2060 | return 0; |
| 2061 | ADDOP_JABS(c, POP_JUMP_IF_TRUE, end); |
| 2062 | ADDOP_O(c, LOAD_GLOBAL, assertion_error, names); |
| 2063 | if (s->v.Assert.msg) { |
| 2064 | VISIT(c, expr, s->v.Assert.msg); |
Benjamin Peterson | 0c0d756 | 2011-10-27 08:21:59 -0400 | [diff] [blame] | 2065 | ADDOP_I(c, CALL_FUNCTION, 1); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2066 | } |
Benjamin Peterson | 0c0d756 | 2011-10-27 08:21:59 -0400 | [diff] [blame] | 2067 | ADDOP_I(c, RAISE_VARARGS, 1); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2068 | compiler_use_next_block(c, end); |
| 2069 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2070 | } |
| 2071 | |
| 2072 | static int |
| 2073 | compiler_visit_stmt(struct compiler *c, stmt_ty s) |
| 2074 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2075 | int i, n; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2076 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2077 | /* Always assign a lineno to the next instruction for a stmt. */ |
| 2078 | c->u->u_lineno = s->lineno; |
| 2079 | c->u->u_lineno_set = false; |
Jeremy Hylton | 12603c4 | 2006-04-01 16:18:02 +0000 | [diff] [blame] | 2080 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2081 | switch (s->kind) { |
| 2082 | case FunctionDef_kind: |
| 2083 | return compiler_function(c, s); |
| 2084 | case ClassDef_kind: |
| 2085 | return compiler_class(c, s); |
| 2086 | case Return_kind: |
| 2087 | if (c->u->u_ste->ste_type != FunctionBlock) |
| 2088 | return compiler_error(c, "'return' outside function"); |
| 2089 | if (s->v.Return.value) { |
| 2090 | VISIT(c, expr, s->v.Return.value); |
| 2091 | } |
| 2092 | else |
| 2093 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 2094 | ADDOP(c, RETURN_VALUE); |
| 2095 | break; |
| 2096 | case Delete_kind: |
| 2097 | VISIT_SEQ(c, expr, s->v.Delete.targets) |
| 2098 | break; |
| 2099 | case Assign_kind: |
| 2100 | n = asdl_seq_LEN(s->v.Assign.targets); |
| 2101 | VISIT(c, expr, s->v.Assign.value); |
| 2102 | for (i = 0; i < n; i++) { |
| 2103 | if (i < n - 1) |
| 2104 | ADDOP(c, DUP_TOP); |
| 2105 | VISIT(c, expr, |
| 2106 | (expr_ty)asdl_seq_GET(s->v.Assign.targets, i)); |
| 2107 | } |
| 2108 | break; |
| 2109 | case AugAssign_kind: |
| 2110 | return compiler_augassign(c, s); |
| 2111 | case Print_kind: |
| 2112 | return compiler_print(c, s); |
| 2113 | case For_kind: |
| 2114 | return compiler_for(c, s); |
| 2115 | case While_kind: |
| 2116 | return compiler_while(c, s); |
| 2117 | case If_kind: |
| 2118 | return compiler_if(c, s); |
| 2119 | case Raise_kind: |
| 2120 | n = 0; |
| 2121 | if (s->v.Raise.type) { |
| 2122 | VISIT(c, expr, s->v.Raise.type); |
| 2123 | n++; |
| 2124 | if (s->v.Raise.inst) { |
| 2125 | VISIT(c, expr, s->v.Raise.inst); |
| 2126 | n++; |
| 2127 | if (s->v.Raise.tback) { |
| 2128 | VISIT(c, expr, s->v.Raise.tback); |
| 2129 | n++; |
| 2130 | } |
| 2131 | } |
| 2132 | } |
| 2133 | ADDOP_I(c, RAISE_VARARGS, n); |
| 2134 | break; |
| 2135 | case TryExcept_kind: |
| 2136 | return compiler_try_except(c, s); |
| 2137 | case TryFinally_kind: |
| 2138 | return compiler_try_finally(c, s); |
| 2139 | case Assert_kind: |
| 2140 | return compiler_assert(c, s); |
| 2141 | case Import_kind: |
| 2142 | return compiler_import(c, s); |
| 2143 | case ImportFrom_kind: |
| 2144 | return compiler_from_import(c, s); |
| 2145 | case Exec_kind: |
| 2146 | VISIT(c, expr, s->v.Exec.body); |
| 2147 | if (s->v.Exec.globals) { |
| 2148 | VISIT(c, expr, s->v.Exec.globals); |
| 2149 | if (s->v.Exec.locals) { |
| 2150 | VISIT(c, expr, s->v.Exec.locals); |
| 2151 | } else { |
| 2152 | ADDOP(c, DUP_TOP); |
| 2153 | } |
| 2154 | } else { |
| 2155 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 2156 | ADDOP(c, DUP_TOP); |
| 2157 | } |
| 2158 | ADDOP(c, EXEC_STMT); |
| 2159 | break; |
| 2160 | case Global_kind: |
| 2161 | break; |
| 2162 | case Expr_kind: |
| 2163 | if (c->c_interactive && c->c_nestlevel <= 1) { |
| 2164 | VISIT(c, expr, s->v.Expr.value); |
| 2165 | ADDOP(c, PRINT_EXPR); |
| 2166 | } |
| 2167 | else if (s->v.Expr.value->kind != Str_kind && |
| 2168 | s->v.Expr.value->kind != Num_kind) { |
| 2169 | VISIT(c, expr, s->v.Expr.value); |
| 2170 | ADDOP(c, POP_TOP); |
| 2171 | } |
| 2172 | break; |
| 2173 | case Pass_kind: |
| 2174 | break; |
| 2175 | case Break_kind: |
| 2176 | if (!compiler_in_loop(c)) |
| 2177 | return compiler_error(c, "'break' outside loop"); |
| 2178 | ADDOP(c, BREAK_LOOP); |
| 2179 | break; |
| 2180 | case Continue_kind: |
| 2181 | return compiler_continue(c); |
| 2182 | case With_kind: |
| 2183 | return compiler_with(c, s); |
| 2184 | } |
| 2185 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2186 | } |
| 2187 | |
| 2188 | static int |
| 2189 | unaryop(unaryop_ty op) |
| 2190 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2191 | switch (op) { |
| 2192 | case Invert: |
| 2193 | return UNARY_INVERT; |
| 2194 | case Not: |
| 2195 | return UNARY_NOT; |
| 2196 | case UAdd: |
| 2197 | return UNARY_POSITIVE; |
| 2198 | case USub: |
| 2199 | return UNARY_NEGATIVE; |
| 2200 | default: |
| 2201 | PyErr_Format(PyExc_SystemError, |
| 2202 | "unary op %d should not be possible", op); |
| 2203 | return 0; |
| 2204 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2205 | } |
| 2206 | |
| 2207 | static int |
| 2208 | binop(struct compiler *c, operator_ty op) |
| 2209 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2210 | switch (op) { |
| 2211 | case Add: |
| 2212 | return BINARY_ADD; |
| 2213 | case Sub: |
| 2214 | return BINARY_SUBTRACT; |
| 2215 | case Mult: |
| 2216 | return BINARY_MULTIPLY; |
| 2217 | case Div: |
| 2218 | if (c->c_flags && c->c_flags->cf_flags & CO_FUTURE_DIVISION) |
| 2219 | return BINARY_TRUE_DIVIDE; |
| 2220 | else |
| 2221 | return BINARY_DIVIDE; |
| 2222 | case Mod: |
| 2223 | return BINARY_MODULO; |
| 2224 | case Pow: |
| 2225 | return BINARY_POWER; |
| 2226 | case LShift: |
| 2227 | return BINARY_LSHIFT; |
| 2228 | case RShift: |
| 2229 | return BINARY_RSHIFT; |
| 2230 | case BitOr: |
| 2231 | return BINARY_OR; |
| 2232 | case BitXor: |
| 2233 | return BINARY_XOR; |
| 2234 | case BitAnd: |
| 2235 | return BINARY_AND; |
| 2236 | case FloorDiv: |
| 2237 | return BINARY_FLOOR_DIVIDE; |
| 2238 | default: |
| 2239 | PyErr_Format(PyExc_SystemError, |
| 2240 | "binary op %d should not be possible", op); |
| 2241 | return 0; |
| 2242 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2243 | } |
| 2244 | |
| 2245 | static int |
| 2246 | cmpop(cmpop_ty op) |
| 2247 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2248 | switch (op) { |
| 2249 | case Eq: |
| 2250 | return PyCmp_EQ; |
| 2251 | case NotEq: |
| 2252 | return PyCmp_NE; |
| 2253 | case Lt: |
| 2254 | return PyCmp_LT; |
| 2255 | case LtE: |
| 2256 | return PyCmp_LE; |
| 2257 | case Gt: |
| 2258 | return PyCmp_GT; |
| 2259 | case GtE: |
| 2260 | return PyCmp_GE; |
| 2261 | case Is: |
| 2262 | return PyCmp_IS; |
| 2263 | case IsNot: |
| 2264 | return PyCmp_IS_NOT; |
| 2265 | case In: |
| 2266 | return PyCmp_IN; |
| 2267 | case NotIn: |
| 2268 | return PyCmp_NOT_IN; |
| 2269 | default: |
| 2270 | return PyCmp_BAD; |
| 2271 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2272 | } |
| 2273 | |
| 2274 | static int |
| 2275 | inplace_binop(struct compiler *c, operator_ty op) |
| 2276 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2277 | switch (op) { |
| 2278 | case Add: |
| 2279 | return INPLACE_ADD; |
| 2280 | case Sub: |
| 2281 | return INPLACE_SUBTRACT; |
| 2282 | case Mult: |
| 2283 | return INPLACE_MULTIPLY; |
| 2284 | case Div: |
| 2285 | if (c->c_flags && c->c_flags->cf_flags & CO_FUTURE_DIVISION) |
| 2286 | return INPLACE_TRUE_DIVIDE; |
| 2287 | else |
| 2288 | return INPLACE_DIVIDE; |
| 2289 | case Mod: |
| 2290 | return INPLACE_MODULO; |
| 2291 | case Pow: |
| 2292 | return INPLACE_POWER; |
| 2293 | case LShift: |
| 2294 | return INPLACE_LSHIFT; |
| 2295 | case RShift: |
| 2296 | return INPLACE_RSHIFT; |
| 2297 | case BitOr: |
| 2298 | return INPLACE_OR; |
| 2299 | case BitXor: |
| 2300 | return INPLACE_XOR; |
| 2301 | case BitAnd: |
| 2302 | return INPLACE_AND; |
| 2303 | case FloorDiv: |
| 2304 | return INPLACE_FLOOR_DIVIDE; |
| 2305 | default: |
| 2306 | PyErr_Format(PyExc_SystemError, |
| 2307 | "inplace binary op %d should not be possible", op); |
| 2308 | return 0; |
| 2309 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2310 | } |
| 2311 | |
| 2312 | static int |
| 2313 | compiler_nameop(struct compiler *c, identifier name, expr_context_ty ctx) |
| 2314 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2315 | int op, scope, arg; |
| 2316 | enum { OP_FAST, OP_GLOBAL, OP_DEREF, OP_NAME } optype; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2317 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2318 | PyObject *dict = c->u->u_names; |
| 2319 | PyObject *mangled; |
| 2320 | /* XXX AugStore isn't used anywhere! */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2321 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2322 | mangled = _Py_Mangle(c->u->u_private, name); |
| 2323 | if (!mangled) |
| 2324 | return 0; |
Neil Schemenauer | 8b528b2 | 2005-10-23 18:37:42 +0000 | [diff] [blame] | 2325 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2326 | op = 0; |
| 2327 | optype = OP_NAME; |
| 2328 | scope = PyST_GetScope(c->u->u_ste, mangled); |
| 2329 | switch (scope) { |
| 2330 | case FREE: |
| 2331 | dict = c->u->u_freevars; |
| 2332 | optype = OP_DEREF; |
| 2333 | break; |
| 2334 | case CELL: |
| 2335 | dict = c->u->u_cellvars; |
| 2336 | optype = OP_DEREF; |
| 2337 | break; |
| 2338 | case LOCAL: |
| 2339 | if (c->u->u_ste->ste_type == FunctionBlock) |
| 2340 | optype = OP_FAST; |
| 2341 | break; |
| 2342 | case GLOBAL_IMPLICIT: |
| 2343 | if (c->u->u_ste->ste_type == FunctionBlock && |
| 2344 | !c->u->u_ste->ste_unoptimized) |
| 2345 | optype = OP_GLOBAL; |
| 2346 | break; |
| 2347 | case GLOBAL_EXPLICIT: |
| 2348 | optype = OP_GLOBAL; |
| 2349 | break; |
| 2350 | default: |
| 2351 | /* scope can be 0 */ |
| 2352 | break; |
| 2353 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2354 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2355 | /* XXX Leave assert here, but handle __doc__ and the like better */ |
| 2356 | assert(scope || PyString_AS_STRING(name)[0] == '_'); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2357 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2358 | switch (optype) { |
| 2359 | case OP_DEREF: |
| 2360 | switch (ctx) { |
| 2361 | case Load: op = LOAD_DEREF; break; |
| 2362 | case Store: op = STORE_DEREF; break; |
| 2363 | case AugLoad: |
| 2364 | case AugStore: |
| 2365 | break; |
| 2366 | case Del: |
| 2367 | PyErr_Format(PyExc_SyntaxError, |
| 2368 | "can not delete variable '%s' referenced " |
| 2369 | "in nested scope", |
| 2370 | PyString_AS_STRING(name)); |
| 2371 | Py_DECREF(mangled); |
| 2372 | return 0; |
| 2373 | case Param: |
| 2374 | default: |
| 2375 | PyErr_SetString(PyExc_SystemError, |
| 2376 | "param invalid for deref variable"); |
| 2377 | return 0; |
| 2378 | } |
| 2379 | break; |
| 2380 | case OP_FAST: |
| 2381 | switch (ctx) { |
| 2382 | case Load: op = LOAD_FAST; break; |
| 2383 | case Store: op = STORE_FAST; break; |
| 2384 | case Del: op = DELETE_FAST; break; |
| 2385 | case AugLoad: |
| 2386 | case AugStore: |
| 2387 | break; |
| 2388 | case Param: |
| 2389 | default: |
| 2390 | PyErr_SetString(PyExc_SystemError, |
| 2391 | "param invalid for local variable"); |
| 2392 | return 0; |
| 2393 | } |
| 2394 | ADDOP_O(c, op, mangled, varnames); |
| 2395 | Py_DECREF(mangled); |
| 2396 | return 1; |
| 2397 | case OP_GLOBAL: |
| 2398 | switch (ctx) { |
| 2399 | case Load: op = LOAD_GLOBAL; break; |
| 2400 | case Store: op = STORE_GLOBAL; break; |
| 2401 | case Del: op = DELETE_GLOBAL; break; |
| 2402 | case AugLoad: |
| 2403 | case AugStore: |
| 2404 | break; |
| 2405 | case Param: |
| 2406 | default: |
| 2407 | PyErr_SetString(PyExc_SystemError, |
| 2408 | "param invalid for global variable"); |
| 2409 | return 0; |
| 2410 | } |
| 2411 | break; |
| 2412 | case OP_NAME: |
| 2413 | switch (ctx) { |
| 2414 | case Load: op = LOAD_NAME; break; |
| 2415 | case Store: op = STORE_NAME; break; |
| 2416 | case Del: op = DELETE_NAME; break; |
| 2417 | case AugLoad: |
| 2418 | case AugStore: |
| 2419 | break; |
| 2420 | case Param: |
| 2421 | default: |
| 2422 | PyErr_SetString(PyExc_SystemError, |
| 2423 | "param invalid for name variable"); |
| 2424 | return 0; |
| 2425 | } |
| 2426 | break; |
| 2427 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2428 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2429 | assert(op); |
| 2430 | arg = compiler_add_o(c, dict, mangled); |
| 2431 | Py_DECREF(mangled); |
| 2432 | if (arg < 0) |
| 2433 | return 0; |
| 2434 | return compiler_addop_i(c, op, arg); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2435 | } |
| 2436 | |
| 2437 | static int |
| 2438 | compiler_boolop(struct compiler *c, expr_ty e) |
| 2439 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2440 | basicblock *end; |
| 2441 | int jumpi, i, n; |
| 2442 | asdl_seq *s; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2443 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2444 | assert(e->kind == BoolOp_kind); |
| 2445 | if (e->v.BoolOp.op == And) |
| 2446 | jumpi = JUMP_IF_FALSE_OR_POP; |
| 2447 | else |
| 2448 | jumpi = JUMP_IF_TRUE_OR_POP; |
| 2449 | end = compiler_new_block(c); |
| 2450 | if (end == NULL) |
| 2451 | return 0; |
| 2452 | s = e->v.BoolOp.values; |
| 2453 | n = asdl_seq_LEN(s) - 1; |
| 2454 | assert(n >= 0); |
| 2455 | for (i = 0; i < n; ++i) { |
| 2456 | VISIT(c, expr, (expr_ty)asdl_seq_GET(s, i)); |
| 2457 | ADDOP_JABS(c, jumpi, end); |
| 2458 | } |
| 2459 | VISIT(c, expr, (expr_ty)asdl_seq_GET(s, n)); |
| 2460 | compiler_use_next_block(c, end); |
| 2461 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2462 | } |
| 2463 | |
| 2464 | static int |
| 2465 | compiler_list(struct compiler *c, expr_ty e) |
| 2466 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2467 | int n = asdl_seq_LEN(e->v.List.elts); |
| 2468 | if (e->v.List.ctx == Store) { |
| 2469 | ADDOP_I(c, UNPACK_SEQUENCE, n); |
| 2470 | } |
| 2471 | VISIT_SEQ(c, expr, e->v.List.elts); |
| 2472 | if (e->v.List.ctx == Load) { |
| 2473 | ADDOP_I(c, BUILD_LIST, n); |
| 2474 | } |
| 2475 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2476 | } |
| 2477 | |
| 2478 | static int |
| 2479 | compiler_tuple(struct compiler *c, expr_ty e) |
| 2480 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2481 | int n = asdl_seq_LEN(e->v.Tuple.elts); |
| 2482 | if (e->v.Tuple.ctx == Store) { |
| 2483 | ADDOP_I(c, UNPACK_SEQUENCE, n); |
| 2484 | } |
| 2485 | VISIT_SEQ(c, expr, e->v.Tuple.elts); |
| 2486 | if (e->v.Tuple.ctx == Load) { |
| 2487 | ADDOP_I(c, BUILD_TUPLE, n); |
| 2488 | } |
| 2489 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2490 | } |
| 2491 | |
| 2492 | static int |
| 2493 | compiler_compare(struct compiler *c, expr_ty e) |
| 2494 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2495 | int i, n; |
| 2496 | basicblock *cleanup = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2497 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2498 | /* XXX the logic can be cleaned up for 1 or multiple comparisons */ |
| 2499 | VISIT(c, expr, e->v.Compare.left); |
| 2500 | n = asdl_seq_LEN(e->v.Compare.ops); |
| 2501 | assert(n > 0); |
| 2502 | if (n > 1) { |
| 2503 | cleanup = compiler_new_block(c); |
| 2504 | if (cleanup == NULL) |
| 2505 | return 0; |
| 2506 | VISIT(c, expr, |
| 2507 | (expr_ty)asdl_seq_GET(e->v.Compare.comparators, 0)); |
| 2508 | } |
| 2509 | for (i = 1; i < n; i++) { |
| 2510 | ADDOP(c, DUP_TOP); |
| 2511 | ADDOP(c, ROT_THREE); |
| 2512 | ADDOP_I(c, COMPARE_OP, |
| 2513 | cmpop((cmpop_ty)(asdl_seq_GET( |
| 2514 | e->v.Compare.ops, i - 1)))); |
| 2515 | ADDOP_JABS(c, JUMP_IF_FALSE_OR_POP, cleanup); |
| 2516 | NEXT_BLOCK(c); |
| 2517 | if (i < (n - 1)) |
| 2518 | VISIT(c, expr, |
| 2519 | (expr_ty)asdl_seq_GET(e->v.Compare.comparators, i)); |
| 2520 | } |
| 2521 | VISIT(c, expr, (expr_ty)asdl_seq_GET(e->v.Compare.comparators, n - 1)); |
| 2522 | ADDOP_I(c, COMPARE_OP, |
| 2523 | cmpop((cmpop_ty)(asdl_seq_GET(e->v.Compare.ops, n - 1)))); |
| 2524 | if (n > 1) { |
| 2525 | basicblock *end = compiler_new_block(c); |
| 2526 | if (end == NULL) |
| 2527 | return 0; |
| 2528 | ADDOP_JREL(c, JUMP_FORWARD, end); |
| 2529 | compiler_use_next_block(c, cleanup); |
| 2530 | ADDOP(c, ROT_TWO); |
| 2531 | ADDOP(c, POP_TOP); |
| 2532 | compiler_use_next_block(c, end); |
| 2533 | } |
| 2534 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2535 | } |
| 2536 | |
| 2537 | static int |
| 2538 | compiler_call(struct compiler *c, expr_ty e) |
| 2539 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2540 | int n, code = 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2541 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2542 | VISIT(c, expr, e->v.Call.func); |
| 2543 | n = asdl_seq_LEN(e->v.Call.args); |
| 2544 | VISIT_SEQ(c, expr, e->v.Call.args); |
| 2545 | if (e->v.Call.keywords) { |
| 2546 | VISIT_SEQ(c, keyword, e->v.Call.keywords); |
| 2547 | n |= asdl_seq_LEN(e->v.Call.keywords) << 8; |
| 2548 | } |
| 2549 | if (e->v.Call.starargs) { |
| 2550 | VISIT(c, expr, e->v.Call.starargs); |
| 2551 | code |= 1; |
| 2552 | } |
| 2553 | if (e->v.Call.kwargs) { |
| 2554 | VISIT(c, expr, e->v.Call.kwargs); |
| 2555 | code |= 2; |
| 2556 | } |
| 2557 | switch (code) { |
| 2558 | case 0: |
| 2559 | ADDOP_I(c, CALL_FUNCTION, n); |
| 2560 | break; |
| 2561 | case 1: |
| 2562 | ADDOP_I(c, CALL_FUNCTION_VAR, n); |
| 2563 | break; |
| 2564 | case 2: |
| 2565 | ADDOP_I(c, CALL_FUNCTION_KW, n); |
| 2566 | break; |
| 2567 | case 3: |
| 2568 | ADDOP_I(c, CALL_FUNCTION_VAR_KW, n); |
| 2569 | break; |
| 2570 | } |
| 2571 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2572 | } |
| 2573 | |
| 2574 | static int |
Antoine Pitrou | d0c3515 | 2008-12-17 00:38:28 +0000 | [diff] [blame] | 2575 | compiler_listcomp_generator(struct compiler *c, asdl_seq *generators, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2576 | int gen_index, expr_ty elt) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2577 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2578 | /* generate code for the iterator, then each of the ifs, |
| 2579 | and then write to the element */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2580 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2581 | comprehension_ty l; |
| 2582 | basicblock *start, *anchor, *skip, *if_cleanup; |
| 2583 | int i, n; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2584 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2585 | start = compiler_new_block(c); |
| 2586 | skip = compiler_new_block(c); |
| 2587 | if_cleanup = compiler_new_block(c); |
| 2588 | anchor = compiler_new_block(c); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2589 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2590 | if (start == NULL || skip == NULL || if_cleanup == NULL || |
| 2591 | anchor == NULL) |
| 2592 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2593 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2594 | l = (comprehension_ty)asdl_seq_GET(generators, gen_index); |
| 2595 | VISIT(c, expr, l->iter); |
| 2596 | ADDOP(c, GET_ITER); |
| 2597 | compiler_use_next_block(c, start); |
| 2598 | ADDOP_JREL(c, FOR_ITER, anchor); |
| 2599 | NEXT_BLOCK(c); |
| 2600 | VISIT(c, expr, l->target); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2601 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2602 | /* XXX this needs to be cleaned up...a lot! */ |
| 2603 | n = asdl_seq_LEN(l->ifs); |
| 2604 | for (i = 0; i < n; i++) { |
| 2605 | expr_ty e = (expr_ty)asdl_seq_GET(l->ifs, i); |
| 2606 | VISIT(c, expr, e); |
| 2607 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, if_cleanup); |
| 2608 | NEXT_BLOCK(c); |
| 2609 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2610 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2611 | if (++gen_index < asdl_seq_LEN(generators)) |
| 2612 | if (!compiler_listcomp_generator(c, generators, gen_index, elt)) |
| 2613 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2614 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2615 | /* only append after the last for generator */ |
| 2616 | if (gen_index >= asdl_seq_LEN(generators)) { |
| 2617 | VISIT(c, expr, elt); |
| 2618 | ADDOP_I(c, LIST_APPEND, gen_index+1); |
Jeremy Hylton | e9357b2 | 2006-03-01 15:47:05 +0000 | [diff] [blame] | 2619 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2620 | compiler_use_next_block(c, skip); |
| 2621 | } |
| 2622 | compiler_use_next_block(c, if_cleanup); |
| 2623 | ADDOP_JABS(c, JUMP_ABSOLUTE, start); |
| 2624 | compiler_use_next_block(c, anchor); |
| 2625 | |
| 2626 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2627 | } |
| 2628 | |
| 2629 | static int |
| 2630 | compiler_listcomp(struct compiler *c, expr_ty e) |
| 2631 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2632 | assert(e->kind == ListComp_kind); |
| 2633 | ADDOP_I(c, BUILD_LIST, 0); |
| 2634 | return compiler_listcomp_generator(c, e->v.ListComp.generators, 0, |
| 2635 | e->v.ListComp.elt); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2636 | } |
| 2637 | |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2638 | /* Dict and set comprehensions and generator expressions work by creating a |
| 2639 | nested function to perform the actual iteration. This means that the |
| 2640 | iteration variables don't leak into the current scope. |
| 2641 | The defined function is called immediately following its definition, with the |
| 2642 | result of that call being the result of the expression. |
| 2643 | The LC/SC version returns the populated container, while the GE version is |
| 2644 | flagged in symtable.c as a generator, so it returns the generator object |
| 2645 | when the function is called. |
| 2646 | This code *knows* that the loop cannot contain break, continue, or return, |
| 2647 | so it cheats and skips the SETUP_LOOP/POP_BLOCK steps used in normal loops. |
| 2648 | |
| 2649 | Possible cleanups: |
| 2650 | - iterate over the generator sequence instead of using recursion |
| 2651 | */ |
| 2652 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2653 | static int |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2654 | compiler_comprehension_generator(struct compiler *c, |
| 2655 | asdl_seq *generators, int gen_index, |
| 2656 | expr_ty elt, expr_ty val, int type) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2657 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2658 | /* generate code for the iterator, then each of the ifs, |
| 2659 | and then write to the element */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2660 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2661 | comprehension_ty gen; |
| 2662 | basicblock *start, *anchor, *skip, *if_cleanup; |
| 2663 | int i, n; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2664 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2665 | start = compiler_new_block(c); |
| 2666 | skip = compiler_new_block(c); |
| 2667 | if_cleanup = compiler_new_block(c); |
| 2668 | anchor = compiler_new_block(c); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2669 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2670 | if (start == NULL || skip == NULL || if_cleanup == NULL || |
| 2671 | anchor == NULL) |
| 2672 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2673 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2674 | gen = (comprehension_ty)asdl_seq_GET(generators, gen_index); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2675 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2676 | if (gen_index == 0) { |
| 2677 | /* Receive outermost iter as an implicit argument */ |
| 2678 | c->u->u_argcount = 1; |
| 2679 | ADDOP_I(c, LOAD_FAST, 0); |
| 2680 | } |
| 2681 | else { |
| 2682 | /* Sub-iter - calculate on the fly */ |
| 2683 | VISIT(c, expr, gen->iter); |
| 2684 | ADDOP(c, GET_ITER); |
| 2685 | } |
| 2686 | compiler_use_next_block(c, start); |
| 2687 | ADDOP_JREL(c, FOR_ITER, anchor); |
| 2688 | NEXT_BLOCK(c); |
| 2689 | VISIT(c, expr, gen->target); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2690 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2691 | /* XXX this needs to be cleaned up...a lot! */ |
| 2692 | n = asdl_seq_LEN(gen->ifs); |
| 2693 | for (i = 0; i < n; i++) { |
| 2694 | expr_ty e = (expr_ty)asdl_seq_GET(gen->ifs, i); |
| 2695 | VISIT(c, expr, e); |
| 2696 | ADDOP_JABS(c, POP_JUMP_IF_FALSE, if_cleanup); |
| 2697 | NEXT_BLOCK(c); |
| 2698 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2699 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2700 | if (++gen_index < asdl_seq_LEN(generators)) |
| 2701 | if (!compiler_comprehension_generator(c, |
| 2702 | generators, gen_index, |
| 2703 | elt, val, type)) |
| 2704 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2705 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2706 | /* only append after the last for generator */ |
| 2707 | if (gen_index >= asdl_seq_LEN(generators)) { |
| 2708 | /* comprehension specific code */ |
| 2709 | switch (type) { |
| 2710 | case COMP_GENEXP: |
| 2711 | VISIT(c, expr, elt); |
| 2712 | ADDOP(c, YIELD_VALUE); |
| 2713 | ADDOP(c, POP_TOP); |
| 2714 | break; |
| 2715 | case COMP_SETCOMP: |
| 2716 | VISIT(c, expr, elt); |
| 2717 | ADDOP_I(c, SET_ADD, gen_index + 1); |
| 2718 | break; |
| 2719 | case COMP_DICTCOMP: |
| 2720 | /* With 'd[k] = v', v is evaluated before k, so we do |
| 2721 | the same. */ |
| 2722 | VISIT(c, expr, val); |
| 2723 | VISIT(c, expr, elt); |
| 2724 | ADDOP_I(c, MAP_ADD, gen_index + 1); |
| 2725 | break; |
| 2726 | default: |
| 2727 | return 0; |
| 2728 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2729 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2730 | compiler_use_next_block(c, skip); |
| 2731 | } |
| 2732 | compiler_use_next_block(c, if_cleanup); |
| 2733 | ADDOP_JABS(c, JUMP_ABSOLUTE, start); |
| 2734 | compiler_use_next_block(c, anchor); |
| 2735 | |
| 2736 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2737 | } |
| 2738 | |
| 2739 | static int |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2740 | compiler_comprehension(struct compiler *c, expr_ty e, int type, identifier name, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2741 | asdl_seq *generators, expr_ty elt, expr_ty val) |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2742 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2743 | PyCodeObject *co = NULL; |
| 2744 | expr_ty outermost_iter; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2745 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2746 | outermost_iter = ((comprehension_ty) |
| 2747 | asdl_seq_GET(generators, 0))->iter; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2748 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2749 | if (!compiler_enter_scope(c, name, (void *)e, e->lineno)) |
| 2750 | goto error; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2751 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2752 | if (type != COMP_GENEXP) { |
| 2753 | int op; |
| 2754 | switch (type) { |
| 2755 | case COMP_SETCOMP: |
| 2756 | op = BUILD_SET; |
| 2757 | break; |
| 2758 | case COMP_DICTCOMP: |
| 2759 | op = BUILD_MAP; |
| 2760 | break; |
| 2761 | default: |
| 2762 | PyErr_Format(PyExc_SystemError, |
| 2763 | "unknown comprehension type %d", type); |
| 2764 | goto error_in_scope; |
| 2765 | } |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2766 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2767 | ADDOP_I(c, op, 0); |
| 2768 | } |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2769 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2770 | if (!compiler_comprehension_generator(c, generators, 0, elt, |
| 2771 | val, type)) |
| 2772 | goto error_in_scope; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2773 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2774 | if (type != COMP_GENEXP) { |
| 2775 | ADDOP(c, RETURN_VALUE); |
| 2776 | } |
| 2777 | |
| 2778 | co = assemble(c, 1); |
| 2779 | compiler_exit_scope(c); |
| 2780 | if (co == NULL) |
| 2781 | goto error; |
| 2782 | |
| 2783 | if (!compiler_make_closure(c, co, 0)) |
| 2784 | goto error; |
| 2785 | Py_DECREF(co); |
| 2786 | |
| 2787 | VISIT(c, expr, outermost_iter); |
| 2788 | ADDOP(c, GET_ITER); |
| 2789 | ADDOP_I(c, CALL_FUNCTION, 1); |
| 2790 | return 1; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2791 | error_in_scope: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2792 | compiler_exit_scope(c); |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2793 | error: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2794 | Py_XDECREF(co); |
| 2795 | return 0; |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2796 | } |
| 2797 | |
| 2798 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2799 | compiler_genexp(struct compiler *c, expr_ty e) |
| 2800 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2801 | static identifier name; |
| 2802 | if (!name) { |
| 2803 | name = PyString_FromString("<genexpr>"); |
| 2804 | if (!name) |
| 2805 | return 0; |
| 2806 | } |
| 2807 | assert(e->kind == GeneratorExp_kind); |
| 2808 | return compiler_comprehension(c, e, COMP_GENEXP, name, |
| 2809 | e->v.GeneratorExp.generators, |
| 2810 | e->v.GeneratorExp.elt, NULL); |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2811 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2812 | |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2813 | static int |
| 2814 | compiler_setcomp(struct compiler *c, expr_ty e) |
| 2815 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2816 | static identifier name; |
| 2817 | if (!name) { |
| 2818 | name = PyString_FromString("<setcomp>"); |
| 2819 | if (!name) |
| 2820 | return 0; |
| 2821 | } |
| 2822 | assert(e->kind == SetComp_kind); |
| 2823 | return compiler_comprehension(c, e, COMP_SETCOMP, name, |
| 2824 | e->v.SetComp.generators, |
| 2825 | e->v.SetComp.elt, NULL); |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2826 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2827 | |
Alexandre Vassalotti | b646547 | 2010-01-11 22:36:12 +0000 | [diff] [blame] | 2828 | static int |
| 2829 | compiler_dictcomp(struct compiler *c, expr_ty e) |
| 2830 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2831 | static identifier name; |
| 2832 | if (!name) { |
| 2833 | name = PyString_FromString("<dictcomp>"); |
| 2834 | if (!name) |
| 2835 | return 0; |
| 2836 | } |
| 2837 | assert(e->kind == DictComp_kind); |
| 2838 | return compiler_comprehension(c, e, COMP_DICTCOMP, name, |
| 2839 | e->v.DictComp.generators, |
| 2840 | e->v.DictComp.key, e->v.DictComp.value); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2841 | } |
| 2842 | |
| 2843 | static int |
| 2844 | compiler_visit_keyword(struct compiler *c, keyword_ty k) |
| 2845 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2846 | ADDOP_O(c, LOAD_CONST, k->arg, consts); |
| 2847 | VISIT(c, expr, k->value); |
| 2848 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2849 | } |
| 2850 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2851 | /* Test whether expression is constant. For constants, report |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2852 | whether they are true or false. |
| 2853 | |
| 2854 | Return values: 1 for true, 0 for false, -1 for non-constant. |
| 2855 | */ |
| 2856 | |
| 2857 | static int |
| 2858 | expr_constant(expr_ty e) |
| 2859 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2860 | switch (e->kind) { |
| 2861 | case Num_kind: |
| 2862 | return PyObject_IsTrue(e->v.Num.n); |
| 2863 | case Str_kind: |
| 2864 | return PyObject_IsTrue(e->v.Str.s); |
| 2865 | case Name_kind: |
| 2866 | /* __debug__ is not assignable, so we can optimize |
| 2867 | * it away in if and while statements */ |
| 2868 | if (strcmp(PyString_AS_STRING(e->v.Name.id), |
| 2869 | "__debug__") == 0) |
| 2870 | return ! Py_OptimizeFlag; |
| 2871 | /* fall through */ |
| 2872 | default: |
| 2873 | return -1; |
| 2874 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2875 | } |
| 2876 | |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2877 | /* |
| 2878 | Implements the with statement from PEP 343. |
| 2879 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2880 | The semantics outlined in that PEP are as follows: |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2881 | |
| 2882 | with EXPR as VAR: |
| 2883 | BLOCK |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2884 | |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2885 | It is implemented roughly as: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2886 | |
Guido van Rossum | da5b701 | 2006-05-02 19:47:52 +0000 | [diff] [blame] | 2887 | context = EXPR |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2888 | exit = context.__exit__ # not calling it |
| 2889 | value = context.__enter__() |
| 2890 | try: |
| 2891 | VAR = value # if VAR present in the syntax |
| 2892 | BLOCK |
| 2893 | finally: |
| 2894 | if an exception was raised: |
Serhiy Storchaka | f0aa88f | 2015-06-11 00:06:27 +0300 | [diff] [blame] | 2895 | exc = copy of (exception, instance, traceback) |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2896 | else: |
Serhiy Storchaka | f0aa88f | 2015-06-11 00:06:27 +0300 | [diff] [blame] | 2897 | exc = (None, None, None) |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2898 | exit(*exc) |
| 2899 | */ |
| 2900 | static int |
| 2901 | compiler_with(struct compiler *c, stmt_ty s) |
| 2902 | { |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2903 | basicblock *block, *finally; |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2904 | |
| 2905 | assert(s->kind == With_kind); |
| 2906 | |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2907 | block = compiler_new_block(c); |
| 2908 | finally = compiler_new_block(c); |
| 2909 | if (!block || !finally) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 2910 | return 0; |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2911 | |
Guido van Rossum | da5b701 | 2006-05-02 19:47:52 +0000 | [diff] [blame] | 2912 | /* Evaluate EXPR */ |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2913 | VISIT(c, expr, s->v.With.context_expr); |
Benjamin Peterson | 1880d8b | 2009-05-25 13:13:44 +0000 | [diff] [blame] | 2914 | ADDOP_JREL(c, SETUP_WITH, finally); |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2915 | |
Benjamin Peterson | 1880d8b | 2009-05-25 13:13:44 +0000 | [diff] [blame] | 2916 | /* SETUP_WITH pushes a finally block. */ |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2917 | compiler_use_next_block(c, block); |
Benjamin Peterson | 565d785 | 2010-02-05 02:12:14 +0000 | [diff] [blame] | 2918 | /* Note that the block is actually called SETUP_WITH in ceval.c, but |
| 2919 | functions the same as SETUP_FINALLY except that exceptions are |
| 2920 | normalized. */ |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2921 | if (!compiler_push_fblock(c, FINALLY_TRY, block)) { |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 2922 | return 0; |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2923 | } |
| 2924 | |
| 2925 | if (s->v.With.optional_vars) { |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 2926 | VISIT(c, expr, s->v.With.optional_vars); |
Benjamin Peterson | 1880d8b | 2009-05-25 13:13:44 +0000 | [diff] [blame] | 2927 | } |
| 2928 | else { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2929 | /* Discard result from context.__enter__() */ |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 2930 | ADDOP(c, POP_TOP); |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2931 | } |
| 2932 | |
| 2933 | /* BLOCK code */ |
Anthony Baxter | 2c33fc7 | 2006-04-12 00:43:09 +0000 | [diff] [blame] | 2934 | VISIT_SEQ(c, stmt, s->v.With.body); |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2935 | |
| 2936 | /* End of try block; start the finally block */ |
| 2937 | ADDOP(c, POP_BLOCK); |
| 2938 | compiler_pop_fblock(c, FINALLY_TRY, block); |
| 2939 | |
| 2940 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 2941 | compiler_use_next_block(c, finally); |
| 2942 | if (!compiler_push_fblock(c, FINALLY_END, finally)) |
Antoine Pitrou | a4d36a9 | 2010-06-22 21:42:05 +0000 | [diff] [blame] | 2943 | return 0; |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2944 | |
Nick Coghlan | 7af53be | 2008-03-07 14:13:28 +0000 | [diff] [blame] | 2945 | /* Finally block starts; context.__exit__ is on the stack under |
| 2946 | the exception or return information. Just issue our magic |
| 2947 | opcode. */ |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2948 | ADDOP(c, WITH_CLEANUP); |
Guido van Rossum | c2e2074 | 2006-02-27 22:32:47 +0000 | [diff] [blame] | 2949 | |
| 2950 | /* Finally block ends. */ |
| 2951 | ADDOP(c, END_FINALLY); |
| 2952 | compiler_pop_fblock(c, FINALLY_END, finally); |
| 2953 | return 1; |
| 2954 | } |
| 2955 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2956 | static int |
| 2957 | compiler_visit_expr(struct compiler *c, expr_ty e) |
| 2958 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2959 | int i, n; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2960 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 2961 | /* If expr e has a different line number than the last expr/stmt, |
| 2962 | set a new line number for the next instruction. |
| 2963 | */ |
| 2964 | if (e->lineno > c->u->u_lineno) { |
| 2965 | c->u->u_lineno = e->lineno; |
| 2966 | c->u->u_lineno_set = false; |
| 2967 | } |
| 2968 | switch (e->kind) { |
| 2969 | case BoolOp_kind: |
| 2970 | return compiler_boolop(c, e); |
| 2971 | case BinOp_kind: |
| 2972 | VISIT(c, expr, e->v.BinOp.left); |
| 2973 | VISIT(c, expr, e->v.BinOp.right); |
| 2974 | ADDOP(c, binop(c, e->v.BinOp.op)); |
| 2975 | break; |
| 2976 | case UnaryOp_kind: |
| 2977 | VISIT(c, expr, e->v.UnaryOp.operand); |
| 2978 | ADDOP(c, unaryop(e->v.UnaryOp.op)); |
| 2979 | break; |
| 2980 | case Lambda_kind: |
| 2981 | return compiler_lambda(c, e); |
| 2982 | case IfExp_kind: |
| 2983 | return compiler_ifexp(c, e); |
| 2984 | case Dict_kind: |
| 2985 | n = asdl_seq_LEN(e->v.Dict.values); |
| 2986 | ADDOP_I(c, BUILD_MAP, (n>0xFFFF ? 0xFFFF : n)); |
| 2987 | for (i = 0; i < n; i++) { |
| 2988 | VISIT(c, expr, |
| 2989 | (expr_ty)asdl_seq_GET(e->v.Dict.values, i)); |
| 2990 | VISIT(c, expr, |
| 2991 | (expr_ty)asdl_seq_GET(e->v.Dict.keys, i)); |
| 2992 | ADDOP(c, STORE_MAP); |
| 2993 | } |
| 2994 | break; |
| 2995 | case Set_kind: |
| 2996 | n = asdl_seq_LEN(e->v.Set.elts); |
| 2997 | VISIT_SEQ(c, expr, e->v.Set.elts); |
| 2998 | ADDOP_I(c, BUILD_SET, n); |
| 2999 | break; |
| 3000 | case ListComp_kind: |
| 3001 | return compiler_listcomp(c, e); |
| 3002 | case SetComp_kind: |
| 3003 | return compiler_setcomp(c, e); |
| 3004 | case DictComp_kind: |
| 3005 | return compiler_dictcomp(c, e); |
| 3006 | case GeneratorExp_kind: |
| 3007 | return compiler_genexp(c, e); |
| 3008 | case Yield_kind: |
| 3009 | if (c->u->u_ste->ste_type != FunctionBlock) |
| 3010 | return compiler_error(c, "'yield' outside function"); |
| 3011 | if (e->v.Yield.value) { |
| 3012 | VISIT(c, expr, e->v.Yield.value); |
| 3013 | } |
| 3014 | else { |
| 3015 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 3016 | } |
| 3017 | ADDOP(c, YIELD_VALUE); |
| 3018 | break; |
| 3019 | case Compare_kind: |
| 3020 | return compiler_compare(c, e); |
| 3021 | case Call_kind: |
| 3022 | return compiler_call(c, e); |
| 3023 | case Repr_kind: |
| 3024 | VISIT(c, expr, e->v.Repr.value); |
| 3025 | ADDOP(c, UNARY_CONVERT); |
| 3026 | break; |
| 3027 | case Num_kind: |
| 3028 | ADDOP_O(c, LOAD_CONST, e->v.Num.n, consts); |
| 3029 | break; |
| 3030 | case Str_kind: |
| 3031 | ADDOP_O(c, LOAD_CONST, e->v.Str.s, consts); |
| 3032 | break; |
| 3033 | /* The following exprs can be assignment targets. */ |
| 3034 | case Attribute_kind: |
| 3035 | if (e->v.Attribute.ctx != AugStore) |
| 3036 | VISIT(c, expr, e->v.Attribute.value); |
| 3037 | switch (e->v.Attribute.ctx) { |
| 3038 | case AugLoad: |
| 3039 | ADDOP(c, DUP_TOP); |
| 3040 | /* Fall through to load */ |
| 3041 | case Load: |
| 3042 | ADDOP_NAME(c, LOAD_ATTR, e->v.Attribute.attr, names); |
| 3043 | break; |
| 3044 | case AugStore: |
| 3045 | ADDOP(c, ROT_TWO); |
| 3046 | /* Fall through to save */ |
| 3047 | case Store: |
| 3048 | ADDOP_NAME(c, STORE_ATTR, e->v.Attribute.attr, names); |
| 3049 | break; |
| 3050 | case Del: |
| 3051 | ADDOP_NAME(c, DELETE_ATTR, e->v.Attribute.attr, names); |
| 3052 | break; |
| 3053 | case Param: |
| 3054 | default: |
| 3055 | PyErr_SetString(PyExc_SystemError, |
| 3056 | "param invalid in attribute expression"); |
| 3057 | return 0; |
| 3058 | } |
| 3059 | break; |
| 3060 | case Subscript_kind: |
| 3061 | switch (e->v.Subscript.ctx) { |
| 3062 | case AugLoad: |
| 3063 | VISIT(c, expr, e->v.Subscript.value); |
| 3064 | VISIT_SLICE(c, e->v.Subscript.slice, AugLoad); |
| 3065 | break; |
| 3066 | case Load: |
| 3067 | VISIT(c, expr, e->v.Subscript.value); |
| 3068 | VISIT_SLICE(c, e->v.Subscript.slice, Load); |
| 3069 | break; |
| 3070 | case AugStore: |
| 3071 | VISIT_SLICE(c, e->v.Subscript.slice, AugStore); |
| 3072 | break; |
| 3073 | case Store: |
| 3074 | VISIT(c, expr, e->v.Subscript.value); |
| 3075 | VISIT_SLICE(c, e->v.Subscript.slice, Store); |
| 3076 | break; |
| 3077 | case Del: |
| 3078 | VISIT(c, expr, e->v.Subscript.value); |
| 3079 | VISIT_SLICE(c, e->v.Subscript.slice, Del); |
| 3080 | break; |
| 3081 | case Param: |
| 3082 | default: |
| 3083 | PyErr_SetString(PyExc_SystemError, |
| 3084 | "param invalid in subscript expression"); |
| 3085 | return 0; |
| 3086 | } |
| 3087 | break; |
| 3088 | case Name_kind: |
| 3089 | return compiler_nameop(c, e->v.Name.id, e->v.Name.ctx); |
| 3090 | /* child nodes of List and Tuple will have expr_context set */ |
| 3091 | case List_kind: |
| 3092 | return compiler_list(c, e); |
| 3093 | case Tuple_kind: |
| 3094 | return compiler_tuple(c, e); |
| 3095 | } |
| 3096 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3097 | } |
| 3098 | |
| 3099 | static int |
| 3100 | compiler_augassign(struct compiler *c, stmt_ty s) |
| 3101 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3102 | expr_ty e = s->v.AugAssign.target; |
| 3103 | expr_ty auge; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3104 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3105 | assert(s->kind == AugAssign_kind); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3106 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3107 | switch (e->kind) { |
| 3108 | case Attribute_kind: |
| 3109 | auge = Attribute(e->v.Attribute.value, e->v.Attribute.attr, |
| 3110 | AugLoad, e->lineno, e->col_offset, c->c_arena); |
| 3111 | if (auge == NULL) |
| 3112 | return 0; |
| 3113 | VISIT(c, expr, auge); |
| 3114 | VISIT(c, expr, s->v.AugAssign.value); |
| 3115 | ADDOP(c, inplace_binop(c, s->v.AugAssign.op)); |
| 3116 | auge->v.Attribute.ctx = AugStore; |
| 3117 | VISIT(c, expr, auge); |
| 3118 | break; |
| 3119 | case Subscript_kind: |
| 3120 | auge = Subscript(e->v.Subscript.value, e->v.Subscript.slice, |
| 3121 | AugLoad, e->lineno, e->col_offset, c->c_arena); |
| 3122 | if (auge == NULL) |
| 3123 | return 0; |
| 3124 | VISIT(c, expr, auge); |
| 3125 | VISIT(c, expr, s->v.AugAssign.value); |
| 3126 | ADDOP(c, inplace_binop(c, s->v.AugAssign.op)); |
| 3127 | auge->v.Subscript.ctx = AugStore; |
| 3128 | VISIT(c, expr, auge); |
| 3129 | break; |
| 3130 | case Name_kind: |
| 3131 | if (!compiler_nameop(c, e->v.Name.id, Load)) |
| 3132 | return 0; |
| 3133 | VISIT(c, expr, s->v.AugAssign.value); |
| 3134 | ADDOP(c, inplace_binop(c, s->v.AugAssign.op)); |
| 3135 | return compiler_nameop(c, e->v.Name.id, Store); |
| 3136 | default: |
| 3137 | PyErr_Format(PyExc_SystemError, |
| 3138 | "invalid node type (%d) for augmented assignment", |
| 3139 | e->kind); |
| 3140 | return 0; |
| 3141 | } |
| 3142 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3143 | } |
| 3144 | |
| 3145 | static int |
| 3146 | compiler_push_fblock(struct compiler *c, enum fblocktype t, basicblock *b) |
| 3147 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3148 | struct fblockinfo *f; |
| 3149 | if (c->u->u_nfblocks >= CO_MAXBLOCKS) { |
Benjamin Peterson | 6c4fa70 | 2016-07-14 22:00:03 -0700 | [diff] [blame] | 3150 | PyErr_SetString(PyExc_SyntaxError, |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3151 | "too many statically nested blocks"); |
| 3152 | return 0; |
| 3153 | } |
| 3154 | f = &c->u->u_fblock[c->u->u_nfblocks++]; |
| 3155 | f->fb_type = t; |
| 3156 | f->fb_block = b; |
| 3157 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3158 | } |
| 3159 | |
| 3160 | static void |
| 3161 | compiler_pop_fblock(struct compiler *c, enum fblocktype t, basicblock *b) |
| 3162 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3163 | struct compiler_unit *u = c->u; |
| 3164 | assert(u->u_nfblocks > 0); |
| 3165 | u->u_nfblocks--; |
| 3166 | assert(u->u_fblock[u->u_nfblocks].fb_type == t); |
| 3167 | assert(u->u_fblock[u->u_nfblocks].fb_block == b); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3168 | } |
| 3169 | |
Jeremy Hylton | 82271f1 | 2006-10-04 02:24:52 +0000 | [diff] [blame] | 3170 | static int |
| 3171 | compiler_in_loop(struct compiler *c) { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3172 | int i; |
| 3173 | struct compiler_unit *u = c->u; |
| 3174 | for (i = 0; i < u->u_nfblocks; ++i) { |
| 3175 | if (u->u_fblock[i].fb_type == LOOP) |
| 3176 | return 1; |
| 3177 | } |
| 3178 | return 0; |
Jeremy Hylton | 82271f1 | 2006-10-04 02:24:52 +0000 | [diff] [blame] | 3179 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3180 | /* Raises a SyntaxError and returns 0. |
| 3181 | If something goes wrong, a different exception may be raised. |
| 3182 | */ |
| 3183 | |
| 3184 | static int |
| 3185 | compiler_error(struct compiler *c, const char *errstr) |
| 3186 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3187 | PyObject *loc; |
| 3188 | PyObject *u = NULL, *v = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3189 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3190 | loc = PyErr_ProgramText(c->c_filename, c->u->u_lineno); |
| 3191 | if (!loc) { |
| 3192 | Py_INCREF(Py_None); |
| 3193 | loc = Py_None; |
| 3194 | } |
| 3195 | u = Py_BuildValue("(ziOO)", c->c_filename, c->u->u_lineno, |
| 3196 | Py_None, loc); |
| 3197 | if (!u) |
| 3198 | goto exit; |
| 3199 | v = Py_BuildValue("(zO)", errstr, u); |
| 3200 | if (!v) |
| 3201 | goto exit; |
| 3202 | PyErr_SetObject(PyExc_SyntaxError, v); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3203 | exit: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3204 | Py_DECREF(loc); |
| 3205 | Py_XDECREF(u); |
| 3206 | Py_XDECREF(v); |
| 3207 | return 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3208 | } |
| 3209 | |
| 3210 | static int |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3211 | compiler_handle_subscr(struct compiler *c, const char *kind, |
| 3212 | expr_context_ty ctx) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3213 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3214 | int op = 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3215 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3216 | /* XXX this code is duplicated */ |
| 3217 | switch (ctx) { |
| 3218 | case AugLoad: /* fall through to Load */ |
| 3219 | case Load: op = BINARY_SUBSCR; break; |
| 3220 | case AugStore:/* fall through to Store */ |
| 3221 | case Store: op = STORE_SUBSCR; break; |
| 3222 | case Del: op = DELETE_SUBSCR; break; |
| 3223 | case Param: |
| 3224 | PyErr_Format(PyExc_SystemError, |
| 3225 | "invalid %s kind %d in subscript\n", |
| 3226 | kind, ctx); |
| 3227 | return 0; |
| 3228 | } |
| 3229 | if (ctx == AugLoad) { |
| 3230 | ADDOP_I(c, DUP_TOPX, 2); |
| 3231 | } |
| 3232 | else if (ctx == AugStore) { |
| 3233 | ADDOP(c, ROT_THREE); |
| 3234 | } |
| 3235 | ADDOP(c, op); |
| 3236 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3237 | } |
| 3238 | |
| 3239 | static int |
| 3240 | compiler_slice(struct compiler *c, slice_ty s, expr_context_ty ctx) |
| 3241 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3242 | int n = 2; |
| 3243 | assert(s->kind == Slice_kind); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3244 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3245 | /* only handles the cases where BUILD_SLICE is emitted */ |
| 3246 | if (s->v.Slice.lower) { |
| 3247 | VISIT(c, expr, s->v.Slice.lower); |
| 3248 | } |
| 3249 | else { |
| 3250 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 3251 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3252 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3253 | if (s->v.Slice.upper) { |
| 3254 | VISIT(c, expr, s->v.Slice.upper); |
| 3255 | } |
| 3256 | else { |
| 3257 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 3258 | } |
| 3259 | |
| 3260 | if (s->v.Slice.step) { |
| 3261 | n++; |
| 3262 | VISIT(c, expr, s->v.Slice.step); |
| 3263 | } |
| 3264 | ADDOP_I(c, BUILD_SLICE, n); |
| 3265 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3266 | } |
| 3267 | |
| 3268 | static int |
| 3269 | compiler_simple_slice(struct compiler *c, slice_ty s, expr_context_ty ctx) |
| 3270 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3271 | int op = 0, slice_offset = 0, stack_count = 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3272 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3273 | assert(s->v.Slice.step == NULL); |
| 3274 | if (s->v.Slice.lower) { |
| 3275 | slice_offset++; |
| 3276 | stack_count++; |
| 3277 | if (ctx != AugStore) |
| 3278 | VISIT(c, expr, s->v.Slice.lower); |
| 3279 | } |
| 3280 | if (s->v.Slice.upper) { |
| 3281 | slice_offset += 2; |
| 3282 | stack_count++; |
| 3283 | if (ctx != AugStore) |
| 3284 | VISIT(c, expr, s->v.Slice.upper); |
| 3285 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3286 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3287 | if (ctx == AugLoad) { |
| 3288 | switch (stack_count) { |
| 3289 | case 0: ADDOP(c, DUP_TOP); break; |
| 3290 | case 1: ADDOP_I(c, DUP_TOPX, 2); break; |
| 3291 | case 2: ADDOP_I(c, DUP_TOPX, 3); break; |
| 3292 | } |
| 3293 | } |
| 3294 | else if (ctx == AugStore) { |
| 3295 | switch (stack_count) { |
| 3296 | case 0: ADDOP(c, ROT_TWO); break; |
| 3297 | case 1: ADDOP(c, ROT_THREE); break; |
| 3298 | case 2: ADDOP(c, ROT_FOUR); break; |
| 3299 | } |
| 3300 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3301 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3302 | switch (ctx) { |
| 3303 | case AugLoad: /* fall through to Load */ |
| 3304 | case Load: op = SLICE; break; |
| 3305 | case AugStore:/* fall through to Store */ |
| 3306 | case Store: op = STORE_SLICE; break; |
| 3307 | case Del: op = DELETE_SLICE; break; |
| 3308 | case Param: |
| 3309 | default: |
| 3310 | PyErr_SetString(PyExc_SystemError, |
| 3311 | "param invalid in simple slice"); |
| 3312 | return 0; |
| 3313 | } |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3314 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3315 | ADDOP(c, op + slice_offset); |
| 3316 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3317 | } |
| 3318 | |
| 3319 | static int |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3320 | compiler_visit_nested_slice(struct compiler *c, slice_ty s, |
| 3321 | expr_context_ty ctx) |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3322 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3323 | switch (s->kind) { |
| 3324 | case Ellipsis_kind: |
| 3325 | ADDOP_O(c, LOAD_CONST, Py_Ellipsis, consts); |
| 3326 | break; |
| 3327 | case Slice_kind: |
| 3328 | return compiler_slice(c, s, ctx); |
| 3329 | case Index_kind: |
| 3330 | VISIT(c, expr, s->v.Index.value); |
| 3331 | break; |
| 3332 | case ExtSlice_kind: |
| 3333 | default: |
| 3334 | PyErr_SetString(PyExc_SystemError, |
| 3335 | "extended slice invalid in nested slice"); |
| 3336 | return 0; |
| 3337 | } |
| 3338 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3339 | } |
| 3340 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3341 | static int |
| 3342 | compiler_visit_slice(struct compiler *c, slice_ty s, expr_context_ty ctx) |
| 3343 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3344 | char * kindname = NULL; |
| 3345 | switch (s->kind) { |
| 3346 | case Index_kind: |
| 3347 | kindname = "index"; |
| 3348 | if (ctx != AugStore) { |
| 3349 | VISIT(c, expr, s->v.Index.value); |
| 3350 | } |
| 3351 | break; |
| 3352 | case Ellipsis_kind: |
| 3353 | kindname = "ellipsis"; |
| 3354 | if (ctx != AugStore) { |
| 3355 | ADDOP_O(c, LOAD_CONST, Py_Ellipsis, consts); |
| 3356 | } |
| 3357 | break; |
| 3358 | case Slice_kind: |
| 3359 | kindname = "slice"; |
| 3360 | if (!s->v.Slice.step) |
| 3361 | return compiler_simple_slice(c, s, ctx); |
| 3362 | if (ctx != AugStore) { |
| 3363 | if (!compiler_slice(c, s, ctx)) |
| 3364 | return 0; |
| 3365 | } |
| 3366 | break; |
| 3367 | case ExtSlice_kind: |
| 3368 | kindname = "extended slice"; |
| 3369 | if (ctx != AugStore) { |
| 3370 | int i, n = asdl_seq_LEN(s->v.ExtSlice.dims); |
| 3371 | for (i = 0; i < n; i++) { |
| 3372 | slice_ty sub = (slice_ty)asdl_seq_GET( |
| 3373 | s->v.ExtSlice.dims, i); |
| 3374 | if (!compiler_visit_nested_slice(c, sub, ctx)) |
| 3375 | return 0; |
| 3376 | } |
| 3377 | ADDOP_I(c, BUILD_TUPLE, n); |
| 3378 | } |
| 3379 | break; |
| 3380 | default: |
| 3381 | PyErr_Format(PyExc_SystemError, |
| 3382 | "invalid subscript kind %d", s->kind); |
| 3383 | return 0; |
| 3384 | } |
| 3385 | return compiler_handle_subscr(c, kindname, ctx); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3386 | } |
| 3387 | |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 3388 | |
| 3389 | /* End of the compiler section, beginning of the assembler section */ |
| 3390 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3391 | /* do depth-first search of basic block graph, starting with block. |
| 3392 | post records the block indices in post-order. |
| 3393 | |
| 3394 | XXX must handle implicit jumps from one block to next |
| 3395 | */ |
| 3396 | |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 3397 | struct assembler { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3398 | PyObject *a_bytecode; /* string containing bytecode */ |
| 3399 | int a_offset; /* offset into bytecode */ |
| 3400 | int a_nblocks; /* number of reachable blocks */ |
| 3401 | basicblock **a_postorder; /* list of blocks in dfs postorder */ |
| 3402 | PyObject *a_lnotab; /* string containing lnotab */ |
| 3403 | int a_lnotab_off; /* offset into lnotab */ |
| 3404 | int a_lineno; /* last lineno of emitted instruction */ |
| 3405 | int a_lineno_off; /* bytecode offset of last lineno */ |
Neal Norwitz | f733a01 | 2006-10-29 18:30:10 +0000 | [diff] [blame] | 3406 | }; |
| 3407 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3408 | static void |
| 3409 | dfs(struct compiler *c, basicblock *b, struct assembler *a) |
| 3410 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3411 | int i; |
| 3412 | struct instr *instr = NULL; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3413 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3414 | if (b->b_seen) |
| 3415 | return; |
| 3416 | b->b_seen = 1; |
| 3417 | if (b->b_next != NULL) |
| 3418 | dfs(c, b->b_next, a); |
| 3419 | for (i = 0; i < b->b_iused; i++) { |
| 3420 | instr = &b->b_instr[i]; |
| 3421 | if (instr->i_jrel || instr->i_jabs) |
| 3422 | dfs(c, instr->i_target, a); |
| 3423 | } |
| 3424 | a->a_postorder[a->a_nblocks++] = b; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3425 | } |
| 3426 | |
Neal Norwitz | 2744c6c | 2005-11-13 01:08:38 +0000 | [diff] [blame] | 3427 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3428 | stackdepth_walk(struct compiler *c, basicblock *b, int depth, int maxdepth) |
| 3429 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3430 | int i, target_depth; |
| 3431 | struct instr *instr; |
| 3432 | if (b->b_seen || b->b_startdepth >= depth) |
| 3433 | return maxdepth; |
| 3434 | b->b_seen = 1; |
| 3435 | b->b_startdepth = depth; |
| 3436 | for (i = 0; i < b->b_iused; i++) { |
| 3437 | instr = &b->b_instr[i]; |
| 3438 | depth += opcode_stack_effect(instr->i_opcode, instr->i_oparg); |
| 3439 | if (depth > maxdepth) |
| 3440 | maxdepth = depth; |
| 3441 | assert(depth >= 0); /* invalid code or bug in stackdepth() */ |
| 3442 | if (instr->i_jrel || instr->i_jabs) { |
| 3443 | target_depth = depth; |
| 3444 | if (instr->i_opcode == FOR_ITER) { |
| 3445 | target_depth = depth-2; |
Antoine Pitrou | ab4a691 | 2014-05-23 11:46:03 +0200 | [diff] [blame] | 3446 | } |
| 3447 | else if (instr->i_opcode == SETUP_FINALLY || |
| 3448 | instr->i_opcode == SETUP_EXCEPT) { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3449 | target_depth = depth+3; |
| 3450 | if (target_depth > maxdepth) |
| 3451 | maxdepth = target_depth; |
| 3452 | } |
Antoine Pitrou | ab4a691 | 2014-05-23 11:46:03 +0200 | [diff] [blame] | 3453 | else if (instr->i_opcode == JUMP_IF_TRUE_OR_POP || |
| 3454 | instr->i_opcode == JUMP_IF_FALSE_OR_POP) |
| 3455 | depth = depth - 1; |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3456 | maxdepth = stackdepth_walk(c, instr->i_target, |
| 3457 | target_depth, maxdepth); |
| 3458 | if (instr->i_opcode == JUMP_ABSOLUTE || |
| 3459 | instr->i_opcode == JUMP_FORWARD) { |
| 3460 | goto out; /* remaining code is dead */ |
| 3461 | } |
| 3462 | } |
| 3463 | } |
| 3464 | if (b->b_next) |
| 3465 | maxdepth = stackdepth_walk(c, b->b_next, depth, maxdepth); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3466 | out: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3467 | b->b_seen = 0; |
| 3468 | return maxdepth; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3469 | } |
| 3470 | |
| 3471 | /* Find the flow path that needs the largest stack. We assume that |
| 3472 | * cycles in the flow graph have no net effect on the stack depth. |
| 3473 | */ |
| 3474 | static int |
| 3475 | stackdepth(struct compiler *c) |
| 3476 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3477 | basicblock *b, *entryblock; |
| 3478 | entryblock = NULL; |
| 3479 | for (b = c->u->u_blocks; b != NULL; b = b->b_list) { |
| 3480 | b->b_seen = 0; |
| 3481 | b->b_startdepth = INT_MIN; |
| 3482 | entryblock = b; |
| 3483 | } |
| 3484 | if (!entryblock) |
| 3485 | return 0; |
| 3486 | return stackdepth_walk(c, entryblock, 0, 0); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3487 | } |
| 3488 | |
| 3489 | static int |
| 3490 | assemble_init(struct assembler *a, int nblocks, int firstlineno) |
| 3491 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3492 | memset(a, 0, sizeof(struct assembler)); |
| 3493 | a->a_lineno = firstlineno; |
| 3494 | a->a_bytecode = PyString_FromStringAndSize(NULL, DEFAULT_CODE_SIZE); |
| 3495 | if (!a->a_bytecode) |
| 3496 | return 0; |
| 3497 | a->a_lnotab = PyString_FromStringAndSize(NULL, DEFAULT_LNOTAB_SIZE); |
| 3498 | if (!a->a_lnotab) |
| 3499 | return 0; |
| 3500 | if (nblocks > PY_SIZE_MAX / sizeof(basicblock *)) { |
| 3501 | PyErr_NoMemory(); |
| 3502 | return 0; |
| 3503 | } |
| 3504 | a->a_postorder = (basicblock **)PyObject_Malloc( |
| 3505 | sizeof(basicblock *) * nblocks); |
| 3506 | if (!a->a_postorder) { |
| 3507 | PyErr_NoMemory(); |
| 3508 | return 0; |
| 3509 | } |
| 3510 | return 1; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3511 | } |
| 3512 | |
| 3513 | static void |
| 3514 | assemble_free(struct assembler *a) |
| 3515 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3516 | Py_XDECREF(a->a_bytecode); |
| 3517 | Py_XDECREF(a->a_lnotab); |
| 3518 | if (a->a_postorder) |
| 3519 | PyObject_Free(a->a_postorder); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3520 | } |
| 3521 | |
| 3522 | /* Return the size of a basic block in bytes. */ |
| 3523 | |
| 3524 | static int |
| 3525 | instrsize(struct instr *instr) |
| 3526 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3527 | if (!instr->i_hasarg) |
| 3528 | return 1; /* 1 byte for the opcode*/ |
| 3529 | if (instr->i_oparg > 0xffff) |
| 3530 | return 6; /* 1 (opcode) + 1 (EXTENDED_ARG opcode) + 2 (oparg) + 2(oparg extended) */ |
| 3531 | return 3; /* 1 (opcode) + 2 (oparg) */ |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3532 | } |
| 3533 | |
| 3534 | static int |
| 3535 | blocksize(basicblock *b) |
| 3536 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3537 | int i; |
| 3538 | int size = 0; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3539 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3540 | for (i = 0; i < b->b_iused; i++) |
| 3541 | size += instrsize(&b->b_instr[i]); |
| 3542 | return size; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3543 | } |
| 3544 | |
Jeffrey Yasskin | 655d835 | 2009-05-23 23:23:01 +0000 | [diff] [blame] | 3545 | /* Appends a pair to the end of the line number table, a_lnotab, representing |
| 3546 | the instruction's bytecode offset and line number. See |
| 3547 | Objects/lnotab_notes.txt for the description of the line number table. */ |
Tim Peters | 2a7f384 | 2001-06-09 09:26:21 +0000 | [diff] [blame] | 3548 | |
Guido van Rossum | f68d8e5 | 2001-04-14 17:55:09 +0000 | [diff] [blame] | 3549 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3550 | assemble_lnotab(struct assembler *a, struct instr *i) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3551 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3552 | int d_bytecode, d_lineno; |
| 3553 | int len; |
| 3554 | unsigned char *lnotab; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3555 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3556 | d_bytecode = a->a_offset - a->a_lineno_off; |
| 3557 | d_lineno = i->i_lineno - a->a_lineno; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3558 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3559 | assert(d_bytecode >= 0); |
| 3560 | assert(d_lineno >= 0); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3561 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3562 | if(d_bytecode == 0 && d_lineno == 0) |
| 3563 | return 1; |
Amaury Forgeot d'Arc | 99af7db | 2008-02-05 00:26:21 +0000 | [diff] [blame] | 3564 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3565 | if (d_bytecode > 255) { |
| 3566 | int j, nbytes, ncodes = d_bytecode / 255; |
| 3567 | nbytes = a->a_lnotab_off + 2 * ncodes; |
| 3568 | len = PyString_GET_SIZE(a->a_lnotab); |
| 3569 | if (nbytes >= len) { |
| 3570 | if ((len <= INT_MAX / 2) && (len * 2 < nbytes)) |
| 3571 | len = nbytes; |
| 3572 | else if (len <= INT_MAX / 2) |
| 3573 | len *= 2; |
| 3574 | else { |
| 3575 | PyErr_NoMemory(); |
| 3576 | return 0; |
| 3577 | } |
| 3578 | if (_PyString_Resize(&a->a_lnotab, len) < 0) |
| 3579 | return 0; |
| 3580 | } |
| 3581 | lnotab = (unsigned char *) |
| 3582 | PyString_AS_STRING(a->a_lnotab) + a->a_lnotab_off; |
| 3583 | for (j = 0; j < ncodes; j++) { |
| 3584 | *lnotab++ = 255; |
| 3585 | *lnotab++ = 0; |
| 3586 | } |
| 3587 | d_bytecode -= ncodes * 255; |
| 3588 | a->a_lnotab_off += ncodes * 2; |
| 3589 | } |
| 3590 | assert(d_bytecode <= 255); |
| 3591 | if (d_lineno > 255) { |
| 3592 | int j, nbytes, ncodes = d_lineno / 255; |
| 3593 | nbytes = a->a_lnotab_off + 2 * ncodes; |
| 3594 | len = PyString_GET_SIZE(a->a_lnotab); |
| 3595 | if (nbytes >= len) { |
| 3596 | if ((len <= INT_MAX / 2) && len * 2 < nbytes) |
| 3597 | len = nbytes; |
| 3598 | else if (len <= INT_MAX / 2) |
| 3599 | len *= 2; |
| 3600 | else { |
| 3601 | PyErr_NoMemory(); |
| 3602 | return 0; |
| 3603 | } |
| 3604 | if (_PyString_Resize(&a->a_lnotab, len) < 0) |
| 3605 | return 0; |
| 3606 | } |
| 3607 | lnotab = (unsigned char *) |
| 3608 | PyString_AS_STRING(a->a_lnotab) + a->a_lnotab_off; |
| 3609 | *lnotab++ = d_bytecode; |
| 3610 | *lnotab++ = 255; |
| 3611 | d_bytecode = 0; |
| 3612 | for (j = 1; j < ncodes; j++) { |
| 3613 | *lnotab++ = 0; |
| 3614 | *lnotab++ = 255; |
| 3615 | } |
| 3616 | d_lineno -= ncodes * 255; |
| 3617 | a->a_lnotab_off += ncodes * 2; |
| 3618 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3619 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3620 | len = PyString_GET_SIZE(a->a_lnotab); |
| 3621 | if (a->a_lnotab_off + 2 >= len) { |
| 3622 | if (_PyString_Resize(&a->a_lnotab, len * 2) < 0) |
| 3623 | return 0; |
| 3624 | } |
| 3625 | lnotab = (unsigned char *) |
| 3626 | PyString_AS_STRING(a->a_lnotab) + a->a_lnotab_off; |
Tim Peters | 51e2651 | 2001-09-07 08:45:55 +0000 | [diff] [blame] | 3627 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3628 | a->a_lnotab_off += 2; |
| 3629 | if (d_bytecode) { |
| 3630 | *lnotab++ = d_bytecode; |
| 3631 | *lnotab++ = d_lineno; |
| 3632 | } |
| 3633 | else { /* First line of a block; def stmt, etc. */ |
| 3634 | *lnotab++ = 0; |
| 3635 | *lnotab++ = d_lineno; |
| 3636 | } |
| 3637 | a->a_lineno = i->i_lineno; |
| 3638 | a->a_lineno_off = a->a_offset; |
| 3639 | return 1; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3640 | } |
| 3641 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3642 | /* assemble_emit() |
| 3643 | Extend the bytecode with a new instruction. |
| 3644 | Update lnotab if necessary. |
Jeremy Hylton | 376e63d | 2003-08-28 14:42:14 +0000 | [diff] [blame] | 3645 | */ |
| 3646 | |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3647 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3648 | assemble_emit(struct assembler *a, struct instr *i) |
Guido van Rossum | 4ca6c9d | 1994-08-29 12:16:12 +0000 | [diff] [blame] | 3649 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3650 | int size, arg = 0, ext = 0; |
| 3651 | Py_ssize_t len = PyString_GET_SIZE(a->a_bytecode); |
| 3652 | char *code; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3653 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3654 | size = instrsize(i); |
| 3655 | if (i->i_hasarg) { |
| 3656 | arg = i->i_oparg; |
| 3657 | ext = arg >> 16; |
| 3658 | } |
| 3659 | if (i->i_lineno && !assemble_lnotab(a, i)) |
| 3660 | return 0; |
| 3661 | if (a->a_offset + size >= len) { |
| 3662 | if (len > PY_SSIZE_T_MAX / 2) |
| 3663 | return 0; |
| 3664 | if (_PyString_Resize(&a->a_bytecode, len * 2) < 0) |
| 3665 | return 0; |
| 3666 | } |
| 3667 | code = PyString_AS_STRING(a->a_bytecode) + a->a_offset; |
| 3668 | a->a_offset += size; |
| 3669 | if (size == 6) { |
| 3670 | assert(i->i_hasarg); |
| 3671 | *code++ = (char)EXTENDED_ARG; |
| 3672 | *code++ = ext & 0xff; |
| 3673 | *code++ = ext >> 8; |
| 3674 | arg &= 0xffff; |
| 3675 | } |
| 3676 | *code++ = i->i_opcode; |
| 3677 | if (i->i_hasarg) { |
| 3678 | assert(size == 3 || size == 6); |
| 3679 | *code++ = arg & 0xff; |
| 3680 | *code++ = arg >> 8; |
| 3681 | } |
| 3682 | return 1; |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 3683 | } |
| 3684 | |
Neal Norwitz | 7d37f2f | 2005-10-23 22:40:47 +0000 | [diff] [blame] | 3685 | static void |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3686 | assemble_jump_offsets(struct assembler *a, struct compiler *c) |
Anthony Baxter | c2a5a63 | 2004-08-02 06:10:11 +0000 | [diff] [blame] | 3687 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3688 | basicblock *b; |
| 3689 | int bsize, totsize, extended_arg_count = 0, last_extended_arg_count; |
| 3690 | int i; |
Guido van Rossum | c5e9629 | 1991-12-10 13:53:51 +0000 | [diff] [blame] | 3691 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3692 | /* Compute the size of each block and fixup jump args. |
| 3693 | Replace block pointer with position in bytecode. */ |
| 3694 | do { |
| 3695 | totsize = 0; |
| 3696 | for (i = a->a_nblocks - 1; i >= 0; i--) { |
| 3697 | b = a->a_postorder[i]; |
| 3698 | bsize = blocksize(b); |
| 3699 | b->b_offset = totsize; |
| 3700 | totsize += bsize; |
| 3701 | } |
| 3702 | last_extended_arg_count = extended_arg_count; |
| 3703 | extended_arg_count = 0; |
| 3704 | for (b = c->u->u_blocks; b != NULL; b = b->b_list) { |
| 3705 | bsize = b->b_offset; |
| 3706 | for (i = 0; i < b->b_iused; i++) { |
| 3707 | struct instr *instr = &b->b_instr[i]; |
| 3708 | /* Relative jumps are computed relative to |
| 3709 | the instruction pointer after fetching |
| 3710 | the jump instruction. |
| 3711 | */ |
| 3712 | bsize += instrsize(instr); |
| 3713 | if (instr->i_jabs) |
| 3714 | instr->i_oparg = instr->i_target->b_offset; |
| 3715 | else if (instr->i_jrel) { |
| 3716 | int delta = instr->i_target->b_offset - bsize; |
| 3717 | instr->i_oparg = delta; |
| 3718 | } |
| 3719 | else |
| 3720 | continue; |
| 3721 | if (instr->i_oparg > 0xffff) |
| 3722 | extended_arg_count++; |
| 3723 | } |
| 3724 | } |
Neal Norwitz | f1d5068 | 2005-10-23 23:00:41 +0000 | [diff] [blame] | 3725 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3726 | /* XXX: This is an awful hack that could hurt performance, but |
| 3727 | on the bright side it should work until we come up |
| 3728 | with a better solution. |
Neal Norwitz | f1d5068 | 2005-10-23 23:00:41 +0000 | [diff] [blame] | 3729 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3730 | The issue is that in the first loop blocksize() is called |
| 3731 | which calls instrsize() which requires i_oparg be set |
| 3732 | appropriately. There is a bootstrap problem because |
| 3733 | i_oparg is calculated in the second loop above. |
Neal Norwitz | f1d5068 | 2005-10-23 23:00:41 +0000 | [diff] [blame] | 3734 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3735 | So we loop until we stop seeing new EXTENDED_ARGs. |
| 3736 | The only EXTENDED_ARGs that could be popping up are |
| 3737 | ones in jump instructions. So this should converge |
| 3738 | fairly quickly. |
| 3739 | */ |
| 3740 | } while (last_extended_arg_count != extended_arg_count); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 3741 | } |
| 3742 | |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3743 | static PyObject * |
| 3744 | dict_keys_inorder(PyObject *dict, int offset) |
| 3745 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3746 | PyObject *tuple, *k, *v; |
| 3747 | Py_ssize_t i, pos = 0, size = PyDict_Size(dict); |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3748 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3749 | tuple = PyTuple_New(size); |
| 3750 | if (tuple == NULL) |
| 3751 | return NULL; |
| 3752 | while (PyDict_Next(dict, &pos, &k, &v)) { |
| 3753 | i = PyInt_AS_LONG(v); |
| 3754 | /* The keys of the dictionary are tuples. (see compiler_add_o) |
| 3755 | The object we want is always first, though. */ |
Victor Stinner | 7791165 | 2016-01-22 12:33:12 +0100 | [diff] [blame] | 3756 | k = PyTuple_GET_ITEM(k, 1); |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3757 | Py_INCREF(k); |
| 3758 | assert((i - offset) < size); |
| 3759 | assert((i - offset) >= 0); |
| 3760 | PyTuple_SET_ITEM(tuple, i - offset, k); |
| 3761 | } |
| 3762 | return tuple; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3763 | } |
| 3764 | |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3765 | static int |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3766 | compute_code_flags(struct compiler *c) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3767 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3768 | PySTEntryObject *ste = c->u->u_ste; |
| 3769 | int flags = 0, n; |
| 3770 | if (ste->ste_type != ModuleBlock) |
| 3771 | flags |= CO_NEWLOCALS; |
| 3772 | if (ste->ste_type == FunctionBlock) { |
| 3773 | if (!ste->ste_unoptimized) |
| 3774 | flags |= CO_OPTIMIZED; |
| 3775 | if (ste->ste_nested) |
| 3776 | flags |= CO_NESTED; |
| 3777 | if (ste->ste_generator) |
| 3778 | flags |= CO_GENERATOR; |
| 3779 | if (ste->ste_varargs) |
| 3780 | flags |= CO_VARARGS; |
| 3781 | if (ste->ste_varkeywords) |
| 3782 | flags |= CO_VARKEYWORDS; |
| 3783 | } |
Thomas Wouters | 5e9f1fa | 2006-02-28 20:02:27 +0000 | [diff] [blame] | 3784 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3785 | /* (Only) inherit compilerflags in PyCF_MASK */ |
| 3786 | flags |= (c->c_flags->cf_flags & PyCF_MASK); |
Thomas Wouters | 5e9f1fa | 2006-02-28 20:02:27 +0000 | [diff] [blame] | 3787 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3788 | n = PyDict_Size(c->u->u_freevars); |
| 3789 | if (n < 0) |
| 3790 | return -1; |
| 3791 | if (n == 0) { |
| 3792 | n = PyDict_Size(c->u->u_cellvars); |
| 3793 | if (n < 0) |
| 3794 | return -1; |
| 3795 | if (n == 0) { |
| 3796 | flags |= CO_NOFREE; |
| 3797 | } |
| 3798 | } |
Jeremy Hylton | d7f393e | 2001-02-12 16:01:03 +0000 | [diff] [blame] | 3799 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3800 | return flags; |
Jeremy Hylton | 29906ee | 2001-02-27 04:23:34 +0000 | [diff] [blame] | 3801 | } |
| 3802 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3803 | static PyCodeObject * |
| 3804 | makecode(struct compiler *c, struct assembler *a) |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3805 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3806 | PyObject *tmp; |
| 3807 | PyCodeObject *co = NULL; |
| 3808 | PyObject *consts = NULL; |
| 3809 | PyObject *names = NULL; |
| 3810 | PyObject *varnames = NULL; |
| 3811 | PyObject *filename = NULL; |
| 3812 | PyObject *name = NULL; |
| 3813 | PyObject *freevars = NULL; |
| 3814 | PyObject *cellvars = NULL; |
| 3815 | PyObject *bytecode = NULL; |
| 3816 | int nlocals, flags; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3817 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3818 | tmp = dict_keys_inorder(c->u->u_consts, 0); |
| 3819 | if (!tmp) |
| 3820 | goto error; |
| 3821 | consts = PySequence_List(tmp); /* optimize_code requires a list */ |
| 3822 | Py_DECREF(tmp); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3823 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3824 | names = dict_keys_inorder(c->u->u_names, 0); |
| 3825 | varnames = dict_keys_inorder(c->u->u_varnames, 0); |
| 3826 | if (!consts || !names || !varnames) |
| 3827 | goto error; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3828 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3829 | cellvars = dict_keys_inorder(c->u->u_cellvars, 0); |
| 3830 | if (!cellvars) |
| 3831 | goto error; |
| 3832 | freevars = dict_keys_inorder(c->u->u_freevars, PyTuple_Size(cellvars)); |
| 3833 | if (!freevars) |
| 3834 | goto error; |
| 3835 | filename = PyString_FromString(c->c_filename); |
| 3836 | if (!filename) |
| 3837 | goto error; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3838 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3839 | nlocals = PyDict_Size(c->u->u_varnames); |
| 3840 | flags = compute_code_flags(c); |
| 3841 | if (flags < 0) |
| 3842 | goto error; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3843 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3844 | bytecode = PyCode_Optimize(a->a_bytecode, consts, names, a->a_lnotab); |
| 3845 | if (!bytecode) |
| 3846 | goto error; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3847 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3848 | tmp = PyList_AsTuple(consts); /* PyCode_New requires a tuple */ |
| 3849 | if (!tmp) |
| 3850 | goto error; |
| 3851 | Py_DECREF(consts); |
| 3852 | consts = tmp; |
| 3853 | |
| 3854 | co = PyCode_New(c->u->u_argcount, nlocals, stackdepth(c), flags, |
| 3855 | bytecode, consts, names, varnames, |
| 3856 | freevars, cellvars, |
| 3857 | filename, c->u->u_name, |
| 3858 | c->u->u_firstlineno, |
| 3859 | a->a_lnotab); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3860 | error: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3861 | Py_XDECREF(consts); |
| 3862 | Py_XDECREF(names); |
| 3863 | Py_XDECREF(varnames); |
| 3864 | Py_XDECREF(filename); |
| 3865 | Py_XDECREF(name); |
| 3866 | Py_XDECREF(freevars); |
| 3867 | Py_XDECREF(cellvars); |
| 3868 | Py_XDECREF(bytecode); |
| 3869 | return co; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3870 | } |
| 3871 | |
Neal Norwitz | 4ffedad | 2006-08-04 04:58:47 +0000 | [diff] [blame] | 3872 | |
| 3873 | /* For debugging purposes only */ |
| 3874 | #if 0 |
| 3875 | static void |
| 3876 | dump_instr(const struct instr *i) |
| 3877 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3878 | const char *jrel = i->i_jrel ? "jrel " : ""; |
| 3879 | const char *jabs = i->i_jabs ? "jabs " : ""; |
| 3880 | char arg[128]; |
Neal Norwitz | 4ffedad | 2006-08-04 04:58:47 +0000 | [diff] [blame] | 3881 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3882 | *arg = '\0'; |
| 3883 | if (i->i_hasarg) |
| 3884 | sprintf(arg, "arg: %d ", i->i_oparg); |
Neal Norwitz | 4ffedad | 2006-08-04 04:58:47 +0000 | [diff] [blame] | 3885 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3886 | fprintf(stderr, "line: %d, opcode: %d %s%s%s\n", |
| 3887 | i->i_lineno, i->i_opcode, arg, jabs, jrel); |
Neal Norwitz | 4ffedad | 2006-08-04 04:58:47 +0000 | [diff] [blame] | 3888 | } |
| 3889 | |
| 3890 | static void |
| 3891 | dump_basicblock(const basicblock *b) |
| 3892 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3893 | const char *seen = b->b_seen ? "seen " : ""; |
| 3894 | const char *b_return = b->b_return ? "return " : ""; |
| 3895 | fprintf(stderr, "used: %d, depth: %d, offset: %d %s%s\n", |
| 3896 | b->b_iused, b->b_startdepth, b->b_offset, seen, b_return); |
| 3897 | if (b->b_instr) { |
| 3898 | int i; |
| 3899 | for (i = 0; i < b->b_iused; i++) { |
| 3900 | fprintf(stderr, " [%02d] ", i); |
| 3901 | dump_instr(b->b_instr + i); |
| 3902 | } |
| 3903 | } |
Neal Norwitz | 4ffedad | 2006-08-04 04:58:47 +0000 | [diff] [blame] | 3904 | } |
| 3905 | #endif |
| 3906 | |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3907 | static PyCodeObject * |
| 3908 | assemble(struct compiler *c, int addNone) |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3909 | { |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3910 | basicblock *b, *entryblock; |
| 3911 | struct assembler a; |
| 3912 | int i, j, nblocks; |
| 3913 | PyCodeObject *co = NULL; |
Jeremy Hylton | 64949cb | 2001-01-25 20:06:59 +0000 | [diff] [blame] | 3914 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3915 | /* Make sure every block that falls off the end returns None. |
| 3916 | XXX NEXT_BLOCK() isn't quite right, because if the last |
| 3917 | block ends with a jump or return b_next shouldn't set. |
| 3918 | */ |
| 3919 | if (!c->u->u_curblock->b_return) { |
| 3920 | NEXT_BLOCK(c); |
| 3921 | if (addNone) |
| 3922 | ADDOP_O(c, LOAD_CONST, Py_None, consts); |
| 3923 | ADDOP(c, RETURN_VALUE); |
| 3924 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3925 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3926 | nblocks = 0; |
| 3927 | entryblock = NULL; |
| 3928 | for (b = c->u->u_blocks; b != NULL; b = b->b_list) { |
| 3929 | nblocks++; |
| 3930 | entryblock = b; |
| 3931 | } |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3932 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3933 | /* Set firstlineno if it wasn't explicitly set. */ |
| 3934 | if (!c->u->u_firstlineno) { |
| 3935 | if (entryblock && entryblock->b_instr) |
| 3936 | c->u->u_firstlineno = entryblock->b_instr->i_lineno; |
| 3937 | else |
| 3938 | c->u->u_firstlineno = 1; |
| 3939 | } |
| 3940 | if (!assemble_init(&a, nblocks, c->u->u_firstlineno)) |
| 3941 | goto error; |
| 3942 | dfs(c, entryblock, &a); |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3943 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3944 | /* Can't modify the bytecode after computing jump offsets. */ |
| 3945 | assemble_jump_offsets(&a, c); |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 3946 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3947 | /* Emit code in reverse postorder from dfs. */ |
| 3948 | for (i = a.a_nblocks - 1; i >= 0; i--) { |
| 3949 | b = a.a_postorder[i]; |
| 3950 | for (j = 0; j < b->b_iused; j++) |
| 3951 | if (!assemble_emit(&a, &b->b_instr[j])) |
| 3952 | goto error; |
| 3953 | } |
Tim Peters | b6c3cea | 2001-06-26 03:36:28 +0000 | [diff] [blame] | 3954 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3955 | if (_PyString_Resize(&a.a_lnotab, a.a_lnotab_off) < 0) |
| 3956 | goto error; |
| 3957 | if (_PyString_Resize(&a.a_bytecode, a.a_offset) < 0) |
| 3958 | goto error; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3959 | |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3960 | co = makecode(c, &a); |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 3961 | error: |
Antoine Pitrou | c83ea13 | 2010-05-09 14:46:46 +0000 | [diff] [blame] | 3962 | assemble_free(&a); |
| 3963 | return co; |
Jeremy Hylton | e36f778 | 2001-01-19 03:21:30 +0000 | [diff] [blame] | 3964 | } |