Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/SimpleLanguage.atg @ 13215:dca16b3416ab
Don't peel counted loops.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Tue, 03 Dec 2013 11:10:16 +0100 |
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1 COMPILER SimpleLanguage |
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2 |
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3 CHARACTERS |
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4 |
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5 letter = 'A'..'Z' + 'a'..'z'. |
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6 nonZeroDigit = "123456789". |
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7 digit = "0123456789". |
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8 cr = '\r'. |
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9 lf = '\n'. |
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10 tab = '\t'. |
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11 stringChar = ANY - "\"" - '\\' - cr - lf. |
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12 |
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13 TOKENS |
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14 |
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15 identifier = letter {letter | digit}. |
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16 stringLiteral = "\"" { stringChar } "\"". |
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17 numericLiteral = "0" | nonZeroDigit { digit }. |
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18 |
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19 PRAGMAS |
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20 |
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21 COMMENTS FROM "/*" TO "*/" |
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22 COMMENTS FROM "//" TO lf |
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23 IGNORE cr + lf + tab |
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24 |
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25 PRODUCTIONS |
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26 |
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27 SimpleLanguage |
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28 = |
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29 Function |
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30 { |
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32 } |
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33 . |
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34 |
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35 Function |
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36 = |
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37 "function" (. factory.startFunction(); .) |
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38 identifier (. String name = t.val; |
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39 List<String> parameterNames = new ArrayList<>(); .) |
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40 ["(" [identifier (. parameterNames.add(t.val); .) |
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41 ] {"," identifier (. parameterNames.add(t.val); .) |
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42 } ")"] |
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43 Block<out StatementNode body> (. factory.createFunction(body, name, parameterNames.toArray(new String[parameterNames.size()])); .) |
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44 . |
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45 |
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46 Block<out StatementNode result> |
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47 = (. List<StatementNode> statements = new ArrayList<>(); .) |
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48 "{" |
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49 { |
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50 Statement<out StatementNode statement> (. statements.add(statement); .) |
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51 } |
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52 "}" (. result = factory.createBlock(statements); .) |
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53 . |
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54 |
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55 Statement<out StatementNode result> |
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56 = (. result = null; .) |
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57 ( |
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58 WhileStatement<out result> |
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59 | |
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60 IfStatement<out result> |
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61 | |
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62 ReturnStatement<out result> |
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63 | |
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64 Expression<out result> ";" |
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65 ) |
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66 . |
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67 |
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68 IfStatement<out StatementNode result> |
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69 = |
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70 "if" "(" Expression<out ConditionNode condition> ")" (. StatementNode thenNode = null; StatementNode elseNode = null; .) |
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71 Block<out thenNode> |
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72 ["else" Block<out elseNode>] (. result = factory.createIf(condition, thenNode, elseNode); .) |
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73 . |
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74 |
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75 WhileStatement<out StatementNode result> |
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76 = |
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77 "while" |
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78 "(" |
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79 Expression<out ConditionNode condition> |
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80 ")" |
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81 Block<out StatementNode body> (. result = factory.createWhile(condition, body); .) |
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82 . |
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83 |
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85 ReturnStatement<out StatementNode result> |
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86 = |
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87 "return" |
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88 Expression<out TypedNode value> ";" (. result = factory.createReturn(value); .) |
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89 . |
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90 |
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91 Expression<out TypedNode result> |
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92 = |
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93 ValueExpression<out result> |
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94 [ |
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96 ValueExpression<out TypedNode right> (. result = factory.createBinary(op, result, right); .) | |
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97 ] |
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98 . |
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99 |
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100 ValueExpression<out TypedNode result> |
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101 = |
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102 Term<out result> |
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103 { |
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104 ("+" | "-") (. String op = t.val; .) |
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105 Term<out TypedNode right> (. result = factory.createBinary(op, result, right); .) |
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106 } |
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107 . |
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108 |
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109 Term<out TypedNode result> |
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110 = |
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111 Factor<out result> |
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112 { |
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113 ("*" | "/") (. String op = t.val; .) |
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114 Factor<out TypedNode right> (. result = factory.createBinary(op, result, right); .) |
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115 } |
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116 . |
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117 |
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118 Factor<out TypedNode result> |
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119 = (. result = null; .) |
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120 ( |
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121 VariableRefOrCall<out result> |
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122 | |
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123 StringLiteral<out result> |
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124 | |
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125 NumericLiteral<out result> |
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126 | |
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127 Ternary<out result> |
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128 | |
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129 "(" Expression<out result> ")" |
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130 ) |
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131 . |
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132 |
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133 Ternary<out TypedNode result> (. TypedNode condition, thenPart, elsePart; .) |
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134 = |
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135 "#" Expression<out condition> "?" Expression<out thenPart> ":" Expression<out elsePart> |
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136 (. result = factory.createTernary(condition, thenPart, elsePart); .) |
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137 . |
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138 |
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139 VariableRefOrCall<out TypedNode result> |
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140 = |
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141 VariableRef<out result> |
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142 [ |
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143 (Parameters<out TypedNode[] parameters>) (. result = factory.createCall(result, parameters); .) |
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144 | ("=" Expression<out TypedNode assignment>) (. result = factory.createAssignment(result, assignment); .) |
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145 ] |
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146 . |
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147 |
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148 Parameters<out TypedNode[] result> |
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149 = |
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150 "(" (. List<TypedNode> parameters = new ArrayList<>(); .) |
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151 [Expression<out TypedNode e1> (. parameters.add(e1); .) |
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152 {"," Expression<out TypedNode e2> (. parameters.add(e2); .) |
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153 } |
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154 ] (. result = parameters.toArray(new TypedNode[parameters.size()]); .) |
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155 ")" |
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156 . |
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157 |
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158 VariableRef<out TypedNode result> |
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159 = |
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160 identifier (. result = factory.createLocal(t.val); .) |
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161 . |
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162 |
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163 StringLiteral<out TypedNode result> |
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164 = |
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165 stringLiteral (. result = factory.createStringLiteral(t.val.substring(1, t.val.length() - 1)); .) |
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166 . |
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167 |
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168 NumericLiteral<out TypedNode result> |
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169 = |
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170 numericLiteral (. result = factory.createNumericLiteral(t.val); .) |
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171 . |
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172 |
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173 END SimpleLanguage. |