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annotate Python/peephole.c @ 56748:8eff759d080f

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Merged revisions 75711 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r75711 | mark.dickinson | 2009-10-26 11:59:30 +0000 (Mon, 26 Oct 2009) | 1 line Skip readline tests if readline module is not available. ........
author Mark Dickinson <dickinsm@gmail.com>
date Mon, 26 Oct 2009 12:01:06 +0000
parents 27eaac07c5d6
children ed8b0ee1c531
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
41554
06145fbc7ab9 Merged revisions 53952-54987 via svnmerge from
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1 /* Peephole optimizations for bytecode compiler. */
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2
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3 #include "Python.h"
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4
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5 #include "Python-ast.h"
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6 #include "node.h"
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7 #include "pyarena.h"
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8 #include "ast.h"
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9 #include "code.h"
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10 #include "compile.h"
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11 #include "symtable.h"
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12 #include "opcode.h"
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13
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14 #define GETARG(arr, i) ((int)((arr[i+2]<<8) + arr[i+1]))
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15 #define UNCONDITIONAL_JUMP(op) (op==JUMP_ABSOLUTE || op==JUMP_FORWARD)
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16 #define CONDITIONAL_JUMP(op) (op==POP_JUMP_IF_FALSE || op==POP_JUMP_IF_TRUE \
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17 || op==JUMP_IF_FALSE_OR_POP || op==JUMP_IF_TRUE_OR_POP)
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18 #define ABSOLUTE_JUMP(op) (op==JUMP_ABSOLUTE || op==CONTINUE_LOOP \
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19 || op==POP_JUMP_IF_FALSE || op==POP_JUMP_IF_TRUE \
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20 || op==JUMP_IF_FALSE_OR_POP || op==JUMP_IF_TRUE_OR_POP)
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21 #define JUMPS_ON_TRUE(op) (op==POP_JUMP_IF_TRUE || op==JUMP_IF_TRUE_OR_POP)
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22 #define GETJUMPTGT(arr, i) (GETARG(arr,i) + (ABSOLUTE_JUMP(arr[i]) ? 0 : i+3))
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23 #define SETARG(arr, i, val) arr[i+2] = val>>8; arr[i+1] = val & 255
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24 #define CODESIZE(op) (HAS_ARG(op) ? 3 : 1)
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25 #define ISBASICBLOCK(blocks, start, bytes) \
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26 (blocks[start]==blocks[start+bytes-1])
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27
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28 /* Replace LOAD_CONST c1. LOAD_CONST c2 ... LOAD_CONST cn BUILD_TUPLE n
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29 with LOAD_CONST (c1, c2, ... cn).
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30 The consts table must still be in list form so that the
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31 new constant (c1, c2, ... cn) can be appended.
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32 Called with codestr pointing to the first LOAD_CONST.
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33 Bails out with no change if one or more of the LOAD_CONSTs is missing.
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34 Also works for BUILD_LIST when followed by an "in" or "not in" test.
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35 */
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36 static int
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37 tuple_of_constants(unsigned char *codestr, Py_ssize_t n, PyObject *consts)
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38 {
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39 PyObject *newconst, *constant;
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40 Py_ssize_t i, arg, len_consts;
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41
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42 /* Pre-conditions */
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43 assert(PyList_CheckExact(consts));
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44 assert(codestr[n*3] == BUILD_TUPLE || codestr[n*3] == BUILD_LIST);
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45 assert(GETARG(codestr, (n*3)) == n);
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46 for (i=0 ; i<n ; i++)
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47 assert(codestr[i*3] == LOAD_CONST);
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48
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49 /* Buildup new tuple of constants */
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50 newconst = PyTuple_New(n);
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51 if (newconst == NULL)
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52 return 0;
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53 len_consts = PyList_GET_SIZE(consts);
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54 for (i=0 ; i<n ; i++) {
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55 arg = GETARG(codestr, (i*3));
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56 assert(arg < len_consts);
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57 constant = PyList_GET_ITEM(consts, arg);
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58 Py_INCREF(constant);
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59 PyTuple_SET_ITEM(newconst, i, constant);
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60 }
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61
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62 /* Append folded constant onto consts */
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63 if (PyList_Append(consts, newconst)) {
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64 Py_DECREF(newconst);
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65 return 0;
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66 }
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67 Py_DECREF(newconst);
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68
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69 /* Write NOPs over old LOAD_CONSTS and
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70 add a new LOAD_CONST newconst on top of the BUILD_TUPLE n */
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71 memset(codestr, NOP, n*3);
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72 codestr[n*3] = LOAD_CONST;
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73 SETARG(codestr, (n*3), len_consts);
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74 return 1;
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75 }
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76
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77 /* Replace LOAD_CONST c1. LOAD_CONST c2 BINOP
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78 with LOAD_CONST binop(c1,c2)
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79 The consts table must still be in list form so that the
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80 new constant can be appended.
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81 Called with codestr pointing to the first LOAD_CONST.
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82 Abandons the transformation if the folding fails (i.e. 1+'a').
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83 If the new constant is a sequence, only folds when the size
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84 is below a threshold value. That keeps pyc files from
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85 becoming large in the presence of code like: (None,)*1000.
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86 */
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87 static int
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88 fold_binops_on_constants(unsigned char *codestr, PyObject *consts)
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89 {
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90 PyObject *newconst, *v, *w;
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91 Py_ssize_t len_consts, size;
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92 int opcode;
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93
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94 /* Pre-conditions */
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95 assert(PyList_CheckExact(consts));
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96 assert(codestr[0] == LOAD_CONST);
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97 assert(codestr[3] == LOAD_CONST);
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98
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99 /* Create new constant */
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100 v = PyList_GET_ITEM(consts, GETARG(codestr, 0));
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101 w = PyList_GET_ITEM(consts, GETARG(codestr, 3));
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102 opcode = codestr[6];
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103 switch (opcode) {
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104 case BINARY_POWER:
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105 newconst = PyNumber_Power(v, w, Py_None);
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106 break;
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107 case BINARY_MULTIPLY:
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108 newconst = PyNumber_Multiply(v, w);
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109 break;
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110 case BINARY_TRUE_DIVIDE:
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111 newconst = PyNumber_TrueDivide(v, w);
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112 break;
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113 case BINARY_FLOOR_DIVIDE:
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114 newconst = PyNumber_FloorDivide(v, w);
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115 break;
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116 case BINARY_MODULO:
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117 newconst = PyNumber_Remainder(v, w);
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118 break;
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119 case BINARY_ADD:
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120 newconst = PyNumber_Add(v, w);
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121 break;
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122 case BINARY_SUBTRACT:
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123 newconst = PyNumber_Subtract(v, w);
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124 break;
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125 case BINARY_SUBSCR:
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126 newconst = PyObject_GetItem(v, w);
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127 break;
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128 case BINARY_LSHIFT:
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129 newconst = PyNumber_Lshift(v, w);
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130 break;
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131 case BINARY_RSHIFT:
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132 newconst = PyNumber_Rshift(v, w);
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133 break;
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134 case BINARY_AND:
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135 newconst = PyNumber_And(v, w);
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136 break;
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137 case BINARY_XOR:
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138 newconst = PyNumber_Xor(v, w);
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139 break;
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140 case BINARY_OR:
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141 newconst = PyNumber_Or(v, w);
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142 break;
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143 default:
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144 /* Called with an unknown opcode */
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145 PyErr_Format(PyExc_SystemError,
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146 "unexpected binary operation %d on a constant",
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147 opcode);
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148 return 0;
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149 }
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150 if (newconst == NULL) {
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151 PyErr_Clear();
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152 return 0;
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153 }
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154 size = PyObject_Size(newconst);
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155 if (size == -1)
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156 PyErr_Clear();
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157 else if (size > 20) {
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158 Py_DECREF(newconst);
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159 return 0;
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160 }
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161
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162 /* Append folded constant into consts table */
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163 len_consts = PyList_GET_SIZE(consts);
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164 if (PyList_Append(consts, newconst)) {
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165 Py_DECREF(newconst);
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166 return 0;
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167 }
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168 Py_DECREF(newconst);
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169
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170 /* Write NOP NOP NOP NOP LOAD_CONST newconst */
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171 memset(codestr, NOP, 4);
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172 codestr[4] = LOAD_CONST;
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173 SETARG(codestr, 4, len_consts);
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174 return 1;
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175 }
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176
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177 static int
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178 fold_unaryops_on_constants(unsigned char *codestr, PyObject *consts)
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179 {
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180 PyObject *newconst=NULL, *v;
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181 Py_ssize_t len_consts;
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182 int opcode;
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183
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184 /* Pre-conditions */
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185 assert(PyList_CheckExact(consts));
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186 assert(codestr[0] == LOAD_CONST);
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187
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188 /* Create new constant */
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189 v = PyList_GET_ITEM(consts, GETARG(codestr, 0));
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190 opcode = codestr[3];
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191 switch (opcode) {
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192 case UNARY_NEGATIVE:
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193 /* Preserve the sign of -0.0 */
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194 if (PyObject_IsTrue(v) == 1)
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195 newconst = PyNumber_Negative(v);
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196 break;
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197 case UNARY_INVERT:
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198 newconst = PyNumber_Invert(v);
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199 break;
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200 case UNARY_POSITIVE:
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Raymond Hettinger <python@rcn.com>
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201 newconst = PyNumber_Positive(v);
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Raymond Hettinger <python@rcn.com>
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202 break;
39610
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203 default:
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204 /* Called with an unknown opcode */
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205 PyErr_Format(PyExc_SystemError,
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206 "unexpected unary operation %d on a constant",
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207 opcode);
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208 return 0;
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209 }
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210 if (newconst == NULL) {
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211 PyErr_Clear();
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212 return 0;
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213 }
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214
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215 /* Append folded constant into consts table */
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216 len_consts = PyList_GET_SIZE(consts);
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217 if (PyList_Append(consts, newconst)) {
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218 Py_DECREF(newconst);
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219 return 0;
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220 }
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221 Py_DECREF(newconst);
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222
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223 /* Write NOP LOAD_CONST newconst */
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224 codestr[0] = NOP;
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225 codestr[1] = LOAD_CONST;
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226 SETARG(codestr, 1, len_consts);
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227 return 1;
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228 }
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229
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230 static unsigned int *
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parents: 45515
diff changeset
231 markblocks(unsigned char *code, Py_ssize_t len)
39610
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232 {
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233 unsigned int *blocks = (unsigned int *)PyMem_Malloc(len*sizeof(int));
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234 int i,j, opcode, blockcnt = 0;
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235
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236 if (blocks == NULL) {
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237 PyErr_NoMemory();
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238 return NULL;
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239 }
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240 memset(blocks, 0, len*sizeof(int));
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241
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242 /* Mark labels in the first pass */
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243 for (i=0 ; i<len ; i+=CODESIZE(opcode)) {
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244 opcode = code[i];
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245 switch (opcode) {
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246 case FOR_ITER:
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247 case JUMP_FORWARD:
51853
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Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
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248 case JUMP_IF_FALSE_OR_POP:
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Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
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249 case JUMP_IF_TRUE_OR_POP:
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Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
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250 case POP_JUMP_IF_FALSE:
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Jeffrey Yasskin <jyasskin@gmail.com>
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251 case POP_JUMP_IF_TRUE:
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252 case JUMP_ABSOLUTE:
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253 case CONTINUE_LOOP:
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254 case SETUP_LOOP:
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255 case SETUP_EXCEPT:
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256 case SETUP_FINALLY:
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diff changeset
257 case SETUP_WITH:
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258 j = GETJUMPTGT(code, i);
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259 blocks[j] = 1;
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260 break;
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261 }
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262 }
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263 /* Build block numbers in the second pass */
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264 for (i=0 ; i<len ; i++) {
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265 blockcnt += blocks[i]; /* increment blockcnt over labels */
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266 blocks[i] = blockcnt;
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267 }
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268 return blocks;
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269 }
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270
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271 /* Helper to replace LOAD_NAME None/True/False with LOAD_CONST
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272 Returns: 0 if no change, 1 if change, -1 if error */
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273 static int
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274 load_global(unsigned char *codestr, Py_ssize_t i, char *name, PyObject *consts)
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275 {
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276 Py_ssize_t j;
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277 PyObject *obj;
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278 if (name == NULL)
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279 return 0;
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280 if (strcmp(name, "None") == 0)
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281 obj = Py_None;
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282 else if (strcmp(name, "True") == 0)
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283 obj = Py_True;
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284 else if (strcmp(name, "False") == 0)
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285 obj = Py_False;
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286 else
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287 return 0;
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288 for (j = 0; j < PyList_GET_SIZE(consts); j++) {
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289 if (PyList_GET_ITEM(consts, j) == obj)
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290 break;
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291 }
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292 if (j == PyList_GET_SIZE(consts)) {
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293 if (PyList_Append(consts, obj) < 0)
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294 return -1;
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295 }
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296 assert(PyList_GET_ITEM(consts, j) == obj);
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297 codestr[i] = LOAD_CONST;
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298 SETARG(codestr, i, j);
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299 return 1;
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300 }
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301
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302 /* Perform basic peephole optimizations to components of a code object.
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303 The consts object should still be in list form to allow new constants
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304 to be appended.
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305
40943
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306 To keep the optimizer simple, it bails out (does nothing) for code that
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parents: 40450
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307 has a length over 32,700, and does not calculate extended arguments.
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308 That allows us to avoid overflow and sign issues. Likewise, it bails when
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309 the lineno table has complex encoding for gaps >= 255. EXTENDED_ARG can
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
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diff changeset
310 appear before MAKE_FUNCTION; in this case both opcodes are skipped.
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
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parents: 40450
diff changeset
311 EXTENDED_ARG preceding any other opcode causes the optimizer to bail.
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312
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313 Optimizations are restricted to simple transformations occuring within a
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314 single basic block. All transformations keep the code size the same or
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315 smaller. For those that reduce size, the gaps are initially filled with
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316 NOPs. Later those NOPs are removed and the jump addresses retargeted in
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317 a single pass. Line numbering is adjusted accordingly. */
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318
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319 PyObject *
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320 PyCode_Optimize(PyObject *code, PyObject* consts, PyObject *names,
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321 PyObject *lineno_obj)
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322 {
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323 Py_ssize_t i, j, codelen;
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324 int nops, h, adj;
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325 int tgt, tgttgt, opcode;
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326 unsigned char *codestr = NULL;
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diff changeset
327 unsigned char *lineno;
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diff changeset
328 int *addrmap = NULL;
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diff changeset
329 int new_line, cum_orig_line, last_line, tabsiz;
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330 int cumlc=0, lastlc=0; /* Count runs of consecutive LOAD_CONSTs */
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331 unsigned int *blocks = NULL;
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332 char *name;
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diff changeset
333
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334 /* Bail out if an exception is set */
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diff changeset
335 if (PyErr_Occurred())
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parents: 54889
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336 goto exitError;
39610
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diff changeset
337
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diff changeset
338 /* Bypass optimization when the lineno table is too complex */
47301
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Christian Heimes <christian@cheimes.de>
parents: 46084
diff changeset
339 assert(PyBytes_Check(lineno_obj));
23ab586c427a Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents: 46084
diff changeset
340 lineno = (unsigned char*)PyBytes_AS_STRING(lineno_obj);
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parents: 46084
diff changeset
341 tabsiz = PyBytes_GET_SIZE(lineno_obj);
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342 if (memchr(lineno, 255, tabsiz) != NULL)
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343 goto exitUnchanged;
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diff changeset
344
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345 /* Avoid situations where jump retargeting could overflow */
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parents: 46084
diff changeset
346 assert(PyBytes_Check(code));
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parents: 46084
diff changeset
347 codelen = PyBytes_GET_SIZE(code);
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diff changeset
348 if (codelen > 32700)
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diff changeset
349 goto exitUnchanged;
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diff changeset
350
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diff changeset
351 /* Make a modifiable copy of the code string */
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diff changeset
352 codestr = (unsigned char *)PyMem_Malloc(codelen);
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diff changeset
353 if (codestr == NULL)
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354 goto exitError;
39610
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355 codestr = (unsigned char *)memcpy(codestr,
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parents: 46084
diff changeset
356 PyBytes_AS_STRING(code), codelen);
39610
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diff changeset
357
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358 /* Verify that RETURN_VALUE terminates the codestring. This allows
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diff changeset
359 the various transformation patterns to look ahead several
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diff changeset
360 instructions without additional checks to make sure they are not
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
361 looking beyond the end of the code string.
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
362 */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
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diff changeset
363 if (codestr[codelen-1] != RETURN_VALUE)
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
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diff changeset
364 goto exitUnchanged;
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
365
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parents:
diff changeset
366 /* Mapping to new jump targets after NOPs are removed */
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parents:
diff changeset
367 addrmap = (int *)PyMem_Malloc(codelen * sizeof(int));
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
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parents:
diff changeset
368 if (addrmap == NULL)
55371
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Alexandre Vassalotti <alexandre@peadrop.com>
parents: 54889
diff changeset
369 goto exitError;
39610
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diff changeset
370
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parents:
diff changeset
371 blocks = markblocks(codestr, codelen);
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parents:
diff changeset
372 if (blocks == NULL)
55371
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Alexandre Vassalotti <alexandre@peadrop.com>
parents: 54889
diff changeset
373 goto exitError;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
374 assert(PyList_Check(consts));
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parents:
diff changeset
375
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parents:
diff changeset
376 for (i=0 ; i<codelen ; i += CODESIZE(codestr[i])) {
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
377 reoptimize_current:
39610
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parents:
diff changeset
378 opcode = codestr[i];
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parents:
diff changeset
379
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Thomas Wouters <thomas@python.org>
parents:
diff changeset
380 lastlc = cumlc;
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Thomas Wouters <thomas@python.org>
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diff changeset
381 cumlc = 0;
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parents:
diff changeset
382
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
383 switch (opcode) {
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
384 /* Replace UNARY_NOT POP_JUMP_IF_FALSE
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
385 with POP_JUMP_IF_TRUE */
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parents:
diff changeset
386 case UNARY_NOT:
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
387 if (codestr[i+1] != POP_JUMP_IF_FALSE
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
388 || !ISBASICBLOCK(blocks,i,4))
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
389 continue;
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
390 j = GETARG(codestr, i+1);
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
391 codestr[i] = POP_JUMP_IF_TRUE;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
392 SETARG(codestr, i, j);
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
393 codestr[i+3] = NOP;
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
394 goto reoptimize_current;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
395
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
396 /* not a is b --> a is not b
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
397 not a in b --> a not in b
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
398 not a is not b --> a is b
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
399 not a not in b --> a in b
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
400 */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
401 case COMPARE_OP:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
402 j = GETARG(codestr, i);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
403 if (j < 6 || j > 9 ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
404 codestr[i+3] != UNARY_NOT ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
405 !ISBASICBLOCK(blocks,i,4))
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
406 continue;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
407 SETARG(codestr, i, (j^1));
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
408 codestr[i+3] = NOP;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
409 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
410
42084
229c28cb9afb Merged revisions 55817-55961 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 41554
diff changeset
411 /* Replace LOAD_GLOBAL/LOAD_NAME None/True/False
229c28cb9afb Merged revisions 55817-55961 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 41554
diff changeset
412 with LOAD_CONST None/True/False */
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
413 case LOAD_NAME:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
414 case LOAD_GLOBAL:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
415 j = GETARG(codestr, i);
48660
85b67fb5672b Rename PyUnicode_AsString -> _PyUnicode_AsString and
Marc-André Lemburg <mal@egenix.com>
parents: 47301
diff changeset
416 name = _PyUnicode_AsString(PyTuple_GET_ITEM(names, j));
42084
229c28cb9afb Merged revisions 55817-55961 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 41554
diff changeset
417 h = load_global(codestr, i, name, consts);
229c28cb9afb Merged revisions 55817-55961 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 41554
diff changeset
418 if (h < 0)
55371
3c4490ad01cf Merged revisions 73683,73786 via svnmerge from
Alexandre Vassalotti <alexandre@peadrop.com>
parents: 54889
diff changeset
419 goto exitError;
42084
229c28cb9afb Merged revisions 55817-55961 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 41554
diff changeset
420 else if (h == 0)
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
421 continue;
41554
06145fbc7ab9 Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents: 40943
diff changeset
422 cumlc = lastlc + 1;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
423 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
424
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
425 /* Skip over LOAD_CONST trueconst
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
426 POP_JUMP_IF_FALSE xx. This improves
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
427 "while 1" performance. */
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
428 case LOAD_CONST:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
429 cumlc = lastlc + 1;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
430 j = GETARG(codestr, i);
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
431 if (codestr[i+3] != POP_JUMP_IF_FALSE ||
51923
e1ce666d7405 Fix 2 oversights from r69961.
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 51853
diff changeset
432 !ISBASICBLOCK(blocks,i,6) ||
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
433 !PyObject_IsTrue(PyList_GET_ITEM(consts, j)))
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
434 continue;
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
435 memset(codestr+i, NOP, 6);
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
436 cumlc = 0;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
437 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
438
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
439 /* Try to fold tuples of constants (includes a case for lists
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
440 which are only used for "in" and "not in" tests).
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
441 Skip over BUILD_SEQN 1 UNPACK_SEQN 1.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
442 Replace BUILD_SEQN 2 UNPACK_SEQN 2 with ROT2.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
443 Replace BUILD_SEQN 3 UNPACK_SEQN 3 with ROT3 ROT2. */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
444 case BUILD_TUPLE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
445 case BUILD_LIST:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
446 j = GETARG(codestr, i);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
447 h = i - 3 * j;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
448 if (h >= 0 &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
449 j <= lastlc &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
450 ((opcode == BUILD_TUPLE &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
451 ISBASICBLOCK(blocks, h, 3*(j+1))) ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
452 (opcode == BUILD_LIST &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
453 codestr[i+3]==COMPARE_OP &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
454 ISBASICBLOCK(blocks, h, 3*(j+2)) &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
455 (GETARG(codestr,i+3)==6 ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
456 GETARG(codestr,i+3)==7))) &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
457 tuple_of_constants(&codestr[h], j, consts)) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
458 assert(codestr[i] == LOAD_CONST);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
459 cumlc = 1;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
460 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
461 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
462 if (codestr[i+3] != UNPACK_SEQUENCE ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
463 !ISBASICBLOCK(blocks,i,6) ||
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
464 j != GETARG(codestr, i+3))
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
465 continue;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
466 if (j == 1) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
467 memset(codestr+i, NOP, 6);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
468 } else if (j == 2) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
469 codestr[i] = ROT_TWO;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
470 memset(codestr+i+1, NOP, 5);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
471 } else if (j == 3) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
472 codestr[i] = ROT_THREE;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
473 codestr[i+1] = ROT_TWO;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
474 memset(codestr+i+2, NOP, 4);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
475 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
476 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
477
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
478 /* Fold binary ops on constants.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
479 LOAD_CONST c1 LOAD_CONST c2 BINOP --> LOAD_CONST binop(c1,c2) */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
480 case BINARY_POWER:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
481 case BINARY_MULTIPLY:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
482 case BINARY_TRUE_DIVIDE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
483 case BINARY_FLOOR_DIVIDE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
484 case BINARY_MODULO:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
485 case BINARY_ADD:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
486 case BINARY_SUBTRACT:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
487 case BINARY_SUBSCR:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
488 case BINARY_LSHIFT:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
489 case BINARY_RSHIFT:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
490 case BINARY_AND:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
491 case BINARY_XOR:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
492 case BINARY_OR:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
493 if (lastlc >= 2 &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
494 ISBASICBLOCK(blocks, i-6, 7) &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
495 fold_binops_on_constants(&codestr[i-6], consts)) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
496 i -= 2;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
497 assert(codestr[i] == LOAD_CONST);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
498 cumlc = 1;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
499 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
500 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
501
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
502 /* Fold unary ops on constants.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
503 LOAD_CONST c1 UNARY_OP --> LOAD_CONST unary_op(c) */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
504 case UNARY_NEGATIVE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
505 case UNARY_INVERT:
56667
27eaac07c5d6 Peephole constant folding had missed UNARY_POSITIVE.
Raymond Hettinger <python@rcn.com>
parents: 55371
diff changeset
506 case UNARY_POSITIVE:
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
507 if (lastlc >= 1 &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
508 ISBASICBLOCK(blocks, i-3, 4) &&
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
509 fold_unaryops_on_constants(&codestr[i-3], consts)) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
510 i -= 2;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
511 assert(codestr[i] == LOAD_CONST);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
512 cumlc = 1;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
513 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
514 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
515
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
516 /* Simplify conditional jump to conditional jump where the
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
517 result of the first test implies the success of a similar
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
518 test or the failure of the opposite test.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
519 Arises in code like:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
520 "if a and b:"
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
521 "if a or b:"
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
522 "a and b or c"
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
523 "(a and b) and c"
51923
e1ce666d7405 Fix 2 oversights from r69961.
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 51853
diff changeset
524 x:JUMP_IF_FALSE_OR_POP y y:JUMP_IF_FALSE_OR_POP z
e1ce666d7405 Fix 2 oversights from r69961.
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 51853
diff changeset
525 --> x:JUMP_IF_FALSE_OR_POP z
e1ce666d7405 Fix 2 oversights from r69961.
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 51853
diff changeset
526 x:JUMP_IF_FALSE_OR_POP y y:JUMP_IF_TRUE_OR_POP z
e1ce666d7405 Fix 2 oversights from r69961.
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 51853
diff changeset
527 --> x:POP_JUMP_IF_FALSE y+3
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
528 where y+3 is the instruction following the second test.
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
529 */
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
530 case JUMP_IF_FALSE_OR_POP:
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
531 case JUMP_IF_TRUE_OR_POP:
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
532 tgt = GETJUMPTGT(codestr, i);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
533 j = codestr[tgt];
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
534 if (CONDITIONAL_JUMP(j)) {
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
535 /* NOTE: all possible jumps here are
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
536 absolute! */
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
537 if (JUMPS_ON_TRUE(j) == JUMPS_ON_TRUE(opcode)) {
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
538 /* The second jump will be
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
539 taken iff the first is. */
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
540 tgttgt = GETJUMPTGT(codestr, tgt);
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
541 /* The current opcode inherits
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
542 its target's stack behaviour */
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
543 codestr[i] = j;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
544 SETARG(codestr, i, tgttgt);
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
545 goto reoptimize_current;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
546 } else {
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
547 /* The second jump is not taken
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
548 if the first is (so jump past
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
549 it), and all conditional
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
550 jumps pop their argument when
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
551 they're not taken (so change
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
552 the first jump to pop its
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
553 argument when it's taken). */
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
554 if (JUMPS_ON_TRUE(opcode))
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
555 codestr[i] = POP_JUMP_IF_TRUE;
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
556 else
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
557 codestr[i] = POP_JUMP_IF_FALSE;
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
558 SETARG(codestr, i, (tgt + 3));
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
559 goto reoptimize_current;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
560 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
561 }
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
562 /* Intentional fallthrough */
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
563
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
564 /* Replace jumps to unconditional jumps */
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
565 case POP_JUMP_IF_FALSE:
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
566 case POP_JUMP_IF_TRUE:
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
567 case FOR_ITER:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
568 case JUMP_FORWARD:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
569 case JUMP_ABSOLUTE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
570 case CONTINUE_LOOP:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
571 case SETUP_LOOP:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
572 case SETUP_EXCEPT:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
573 case SETUP_FINALLY:
54889
3aaf2e065db0 Merged revisions 72912,72920,72940 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 51923
diff changeset
574 case SETUP_WITH:
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
575 tgt = GETJUMPTGT(codestr, i);
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
576 /* Replace JUMP_* to a RETURN into just a RETURN */
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
577 if (UNCONDITIONAL_JUMP(opcode) &&
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
578 codestr[tgt] == RETURN_VALUE) {
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
579 codestr[i] = RETURN_VALUE;
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
580 memset(codestr+i+1, NOP, 2);
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
581 continue;
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
582 }
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
583 if (!UNCONDITIONAL_JUMP(codestr[tgt]))
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
584 continue;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
585 tgttgt = GETJUMPTGT(codestr, tgt);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
586 if (opcode == JUMP_FORWARD) /* JMP_ABS can go backwards */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
587 opcode = JUMP_ABSOLUTE;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
588 if (!ABSOLUTE_JUMP(opcode))
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
589 tgttgt -= i + 3; /* Calc relative jump addr */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
590 if (tgttgt < 0) /* No backward relative jumps */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
591 continue;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
592 codestr[i] = opcode;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
593 SETARG(codestr, i, tgttgt);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
594 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
595
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
596 case EXTENDED_ARG:
40943
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
Guido van Rossum <guido@python.org>
parents: 40450
diff changeset
597 if (codestr[i+3] != MAKE_FUNCTION)
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
Guido van Rossum <guido@python.org>
parents: 40450
diff changeset
598 goto exitUnchanged;
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
Guido van Rossum <guido@python.org>
parents: 40450
diff changeset
599 /* don't visit MAKE_FUNCTION as GETARG will be wrong */
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
Guido van Rossum <guido@python.org>
parents: 40450
diff changeset
600 i += 3;
c79e6234fb19 Two more patches by Tony Lownds (SF# 1607548).
Guido van Rossum <guido@python.org>
parents: 40450
diff changeset
601 break;
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
602
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
603 /* Replace RETURN LOAD_CONST None RETURN with just RETURN */
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
604 /* Remove unreachable JUMPs after RETURN */
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
605 case RETURN_VALUE:
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
606 if (i+4 >= codelen)
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
607 continue;
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
608 if (codestr[i+4] == RETURN_VALUE &&
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
609 ISBASICBLOCK(blocks,i,5))
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
610 memset(codestr+i+1, NOP, 4);
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
611 else if (UNCONDITIONAL_JUMP(codestr[i+1]) &&
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
612 ISBASICBLOCK(blocks,i,4))
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 39678
diff changeset
613 memset(codestr+i+1, NOP, 3);
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
614 break;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
615 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
616 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
617
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
618 /* Fixup linenotab */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
619 for (i=0, nops=0 ; i<codelen ; i += CODESIZE(codestr[i])) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
620 addrmap[i] = i - nops;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
621 if (codestr[i] == NOP)
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
622 nops++;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
623 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
624 cum_orig_line = 0;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
625 last_line = 0;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
626 for (i=0 ; i < tabsiz ; i+=2) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
627 cum_orig_line += lineno[i];
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
628 new_line = addrmap[cum_orig_line];
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
629 assert (new_line - last_line < 255);
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
630 lineno[i] =((unsigned char)(new_line - last_line));
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
631 last_line = new_line;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
632 }
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
633
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
634 /* Remove NOPs and fixup jump targets */
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
635 for (i=0, h=0 ; i<codelen ; ) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
636 opcode = codestr[i];
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
637 switch (opcode) {
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
638 case NOP:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
639 i++;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
640 continue;
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
641
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
642 case JUMP_ABSOLUTE:
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
643 case CONTINUE_LOOP:
51853
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
644 case POP_JUMP_IF_FALSE:
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
645 case POP_JUMP_IF_TRUE:
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
646 case JUMP_IF_FALSE_OR_POP:
643d8d4fc8eb http://bugs.python.org/issue4715
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 49747
diff changeset
647 case JUMP_IF_TRUE_OR_POP:
39610
3674f20ac781 Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
diff changeset
648 j = addrmap[GETARG(codestr, i)];
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649 SETARG(codestr, i, j);
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650 break;
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651
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652 case FOR_ITER:
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653 case JUMP_FORWARD:
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654 case SETUP_LOOP:
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655 case SETUP_EXCEPT:
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656 case SETUP_FINALLY:
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657 case SETUP_WITH:
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658 j = addrmap[GETARG(codestr, i) + i + 3] - addrmap[i] - 3;
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659 SETARG(codestr, i, j);
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660 break;
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661 }
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662 adj = CODESIZE(opcode);
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663 while (adj--)
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664 codestr[h++] = codestr[i++];
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665 }
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666 assert(h + nops == codelen);
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667
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668 code = PyBytes_FromStringAndSize((char *)codestr, h);
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669 PyMem_Free(addrmap);
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670 PyMem_Free(codestr);
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671 PyMem_Free(blocks);
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672 return code;
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parents:
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673
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Alexandre Vassalotti <alexandre@peadrop.com>
parents: 54889
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674 exitError:
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Alexandre Vassalotti <alexandre@peadrop.com>
parents: 54889
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675 code = NULL;
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676
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677 exitUnchanged:
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678 if (blocks != NULL)
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Thomas Wouters <thomas@python.org>
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679 PyMem_Free(blocks);
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680 if (addrmap != NULL)
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681 PyMem_Free(addrmap);
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682 if (codestr != NULL)
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683 PyMem_Free(codestr);
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Alexandre Vassalotti <alexandre@peadrop.com>
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diff changeset
684 Py_XINCREF(code);
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685 return code;
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parents:
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686 }