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1 /*
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2 * Copyright 1997-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // Portions of code courtesy of Clifford Click
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26
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27 //------------------------------SUBNode----------------------------------------
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28 // Class SUBTRACTION functionality. This covers all the usual 'subtract'
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29 // behaviors. Subtract-integer, -float, -double, binary xor, compare-integer,
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30 // -float, and -double are all inherited from this class. The compare
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31 // functions behave like subtract functions, except that all negative answers
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32 // are compressed into -1, and all positive answers compressed to 1.
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33 class SubNode : public Node {
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34 public:
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35 SubNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {
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36 init_class_id(Class_Sub);
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37 }
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38
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39 // Handle algebraic identities here. If we have an identity, return the Node
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40 // we are equivalent to. We look for "add of zero" as an identity.
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41 virtual Node *Identity( PhaseTransform *phase );
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42
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43 // Compute a new Type for this node. Basically we just do the pre-check,
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44 // then call the virtual add() to set the type.
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45 virtual const Type *Value( PhaseTransform *phase ) const;
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46
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47 // Supplied function returns the subtractend of the inputs.
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48 // This also type-checks the inputs for sanity. Guaranteed never to
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49 // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
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50 virtual const Type *sub( const Type *, const Type * ) const = 0;
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51
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52 // Supplied function to return the additive identity type.
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53 // This is returned whenever the subtracts inputs are the same.
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54 virtual const Type *add_id() const = 0;
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55
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56 };
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57
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58
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59 // NOTE: SubINode should be taken away and replaced by add and negate
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60 //------------------------------SubINode---------------------------------------
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61 // Subtract 2 integers
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62 class SubINode : public SubNode {
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63 public:
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64 SubINode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
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65 virtual int Opcode() const;
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66 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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67 virtual const Type *sub( const Type *, const Type * ) const;
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68 const Type *add_id() const { return TypeInt::ZERO; }
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69 const Type *bottom_type() const { return TypeInt::INT; }
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70 virtual uint ideal_reg() const { return Op_RegI; }
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71 };
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72
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73 //------------------------------SubLNode---------------------------------------
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74 // Subtract 2 integers
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75 class SubLNode : public SubNode {
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76 public:
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77 SubLNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
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78 virtual int Opcode() const;
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79 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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80 virtual const Type *sub( const Type *, const Type * ) const;
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81 const Type *add_id() const { return TypeLong::ZERO; }
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82 const Type *bottom_type() const { return TypeLong::LONG; }
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83 virtual uint ideal_reg() const { return Op_RegL; }
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84 };
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85
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86 // NOTE: SubFPNode should be taken away and replaced by add and negate
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87 //------------------------------SubFPNode--------------------------------------
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88 // Subtract 2 floats or doubles
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89 class SubFPNode : public SubNode {
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90 protected:
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91 SubFPNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {}
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92 public:
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93 const Type *Value( PhaseTransform *phase ) const;
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94 };
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95
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96 // NOTE: SubFNode should be taken away and replaced by add and negate
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97 //------------------------------SubFNode---------------------------------------
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98 // Subtract 2 doubles
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99 class SubFNode : public SubFPNode {
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100 public:
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101 SubFNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {}
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102 virtual int Opcode() const;
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103 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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104 virtual const Type *sub( const Type *, const Type * ) const;
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105 const Type *add_id() const { return TypeF::ZERO; }
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106 const Type *bottom_type() const { return Type::FLOAT; }
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107 virtual uint ideal_reg() const { return Op_RegF; }
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108 };
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109
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110 // NOTE: SubDNode should be taken away and replaced by add and negate
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111 //------------------------------SubDNode---------------------------------------
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112 // Subtract 2 doubles
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113 class SubDNode : public SubFPNode {
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114 public:
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115 SubDNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {}
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116 virtual int Opcode() const;
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117 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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118 virtual const Type *sub( const Type *, const Type * ) const;
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119 const Type *add_id() const { return TypeD::ZERO; }
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120 const Type *bottom_type() const { return Type::DOUBLE; }
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121 virtual uint ideal_reg() const { return Op_RegD; }
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122 };
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123
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124 //------------------------------CmpNode---------------------------------------
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125 // Compare 2 values, returning condition codes (-1, 0 or 1).
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126 class CmpNode : public SubNode {
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127 public:
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128 CmpNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {
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129 init_class_id(Class_Cmp);
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130 }
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131 virtual Node *Identity( PhaseTransform *phase );
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132 const Type *add_id() const { return TypeInt::ZERO; }
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133 const Type *bottom_type() const { return TypeInt::CC; }
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134 virtual uint ideal_reg() const { return Op_RegFlags; }
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135 };
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136
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137 //------------------------------CmpINode---------------------------------------
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138 // Compare 2 signed values, returning condition codes (-1, 0 or 1).
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139 class CmpINode : public CmpNode {
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140 public:
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141 CmpINode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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142 virtual int Opcode() const;
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143 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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144 virtual const Type *sub( const Type *, const Type * ) const;
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145 };
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146
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147 //------------------------------CmpUNode---------------------------------------
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148 // Compare 2 unsigned values (integer or pointer), returning condition codes (-1, 0 or 1).
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149 class CmpUNode : public CmpNode {
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150 public:
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151 CmpUNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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152 virtual int Opcode() const;
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153 virtual const Type *sub( const Type *, const Type * ) const;
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154 };
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155
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156 //------------------------------CmpPNode---------------------------------------
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157 // Compare 2 pointer values, returning condition codes (-1, 0 or 1).
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158 class CmpPNode : public CmpNode {
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159 public:
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160 CmpPNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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161 virtual int Opcode() const;
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162 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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163 virtual const Type *sub( const Type *, const Type * ) const;
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164 };
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165
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166 //------------------------------CmpLNode---------------------------------------
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167 // Compare 2 long values, returning condition codes (-1, 0 or 1).
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168 class CmpLNode : public CmpNode {
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169 public:
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170 CmpLNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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171 virtual int Opcode() const;
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172 virtual const Type *sub( const Type *, const Type * ) const;
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173 };
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174
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175 //------------------------------CmpL3Node--------------------------------------
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176 // Compare 2 long values, returning integer value (-1, 0 or 1).
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177 class CmpL3Node : public CmpLNode {
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178 public:
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179 CmpL3Node( Node *in1, Node *in2 ) : CmpLNode(in1,in2) {
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180 // Since it is not consumed by Bools, it is not really a Cmp.
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181 init_class_id(Class_Sub);
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182 }
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183 virtual int Opcode() const;
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184 virtual uint ideal_reg() const { return Op_RegI; }
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185 };
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186
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187 //------------------------------CmpFNode---------------------------------------
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188 // Compare 2 float values, returning condition codes (-1, 0 or 1).
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189 // This implements the Java bytecode fcmpl, so unordered returns -1.
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190 // Operands may not commute.
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191 class CmpFNode : public CmpNode {
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192 public:
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193 CmpFNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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194 virtual int Opcode() const;
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195 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; }
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196 const Type *Value( PhaseTransform *phase ) const;
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197 };
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198
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199 //------------------------------CmpF3Node--------------------------------------
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200 // Compare 2 float values, returning integer value (-1, 0 or 1).
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201 // This implements the Java bytecode fcmpl, so unordered returns -1.
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202 // Operands may not commute.
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203 class CmpF3Node : public CmpFNode {
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204 public:
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205 CmpF3Node( Node *in1, Node *in2 ) : CmpFNode(in1,in2) {
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206 // Since it is not consumed by Bools, it is not really a Cmp.
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207 init_class_id(Class_Sub);
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208 }
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209 virtual int Opcode() const;
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210 // Since it is not consumed by Bools, it is not really a Cmp.
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211 virtual uint ideal_reg() const { return Op_RegI; }
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212 };
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213
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214
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215 //------------------------------CmpDNode---------------------------------------
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216 // Compare 2 double values, returning condition codes (-1, 0 or 1).
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217 // This implements the Java bytecode dcmpl, so unordered returns -1.
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218 // Operands may not commute.
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219 class CmpDNode : public CmpNode {
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220 public:
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221 CmpDNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {}
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222 virtual int Opcode() const;
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223 virtual const Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; }
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224 const Type *Value( PhaseTransform *phase ) const;
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225 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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226 };
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227
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228 //------------------------------CmpD3Node--------------------------------------
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229 // Compare 2 double values, returning integer value (-1, 0 or 1).
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230 // This implements the Java bytecode dcmpl, so unordered returns -1.
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231 // Operands may not commute.
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232 class CmpD3Node : public CmpDNode {
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233 public:
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234 CmpD3Node( Node *in1, Node *in2 ) : CmpDNode(in1,in2) {
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235 // Since it is not consumed by Bools, it is not really a Cmp.
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236 init_class_id(Class_Sub);
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237 }
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238 virtual int Opcode() const;
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239 virtual uint ideal_reg() const { return Op_RegI; }
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240 };
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241
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242
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243 //------------------------------BoolTest---------------------------------------
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244 // Convert condition codes to a boolean test value (0 or -1).
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245 // We pick the values as 3 bits; the low order 2 bits we compare against the
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246 // condition codes, the high bit flips the sense of the result.
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247 struct BoolTest VALUE_OBJ_CLASS_SPEC {
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248 enum mask { eq = 0, ne = 4, le = 5, ge = 7, lt = 3, gt = 1, illegal = 8 };
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249 mask _test;
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250 BoolTest( mask btm ) : _test(btm) {}
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251 const Type *cc2logical( const Type *CC ) const;
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252 // Commute the test. I use a small table lookup. The table is created as
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253 // a simple char array where each element is the ASCII version of a 'mask'
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254 // enum from above.
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255 mask commute( ) const { return mask("038147858"[_test]-'0'); }
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256 mask negate( ) const { return mask(_test^4); }
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257 bool is_canonical( ) const { return (_test == BoolTest::ne || _test == BoolTest::lt || _test == BoolTest::le); }
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258 #ifndef PRODUCT
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259 void dump_on(outputStream *st) const;
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260 #endif
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261 };
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262
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263 //------------------------------BoolNode---------------------------------------
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264 // A Node to convert a Condition Codes to a Logical result.
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265 class BoolNode : public Node {
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266 virtual uint hash() const;
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267 virtual uint cmp( const Node &n ) const;
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268 virtual uint size_of() const;
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269 public:
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270 const BoolTest _test;
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271 BoolNode( Node *cc, BoolTest::mask t): _test(t), Node(0,cc) {
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272 init_class_id(Class_Bool);
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273 }
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274 // Convert an arbitrary int value to a Bool or other suitable predicate.
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275 static Node* make_predicate(Node* test_value, PhaseGVN* phase);
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276 // Convert self back to an integer value.
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277 Node* as_int_value(PhaseGVN* phase);
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278 // Invert sense of self, returning new Bool.
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279 BoolNode* negate(PhaseGVN* phase);
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280 virtual int Opcode() const;
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281 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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282 virtual const Type *Value( PhaseTransform *phase ) const;
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283 virtual const Type *bottom_type() const { return TypeInt::BOOL; }
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284 uint match_edge(uint idx) const { return 0; }
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285 virtual uint ideal_reg() const { return Op_RegI; }
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286
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287 bool is_counted_loop_exit_test();
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288 #ifndef PRODUCT
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289 virtual void dump_spec(outputStream *st) const;
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290 #endif
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291 };
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292
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293 //------------------------------AbsNode----------------------------------------
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294 // Abstract class for absolute value. Mostly used to get a handy wrapper
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295 // for finding this pattern in the graph.
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296 class AbsNode : public Node {
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297 public:
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298 AbsNode( Node *value ) : Node(0,value) {}
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299 };
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300
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301 //------------------------------AbsINode---------------------------------------
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302 // Absolute value an integer. Since a naive graph involves control flow, we
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303 // "match" it in the ideal world (so the control flow can be removed).
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304 class AbsINode : public AbsNode {
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305 public:
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306 AbsINode( Node *in1 ) : AbsNode(in1) {}
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307 virtual int Opcode() const;
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308 const Type *bottom_type() const { return TypeInt::INT; }
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309 virtual uint ideal_reg() const { return Op_RegI; }
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310 };
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311
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312 //------------------------------AbsFNode---------------------------------------
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313 // Absolute value a float, a common float-point idiom with a cheap hardware
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314 // implemention on most chips. Since a naive graph involves control flow, we
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315 // "match" it in the ideal world (so the control flow can be removed).
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316 class AbsFNode : public AbsNode {
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317 public:
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318 AbsFNode( Node *in1 ) : AbsNode(in1) {}
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319 virtual int Opcode() const;
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320 const Type *bottom_type() const { return Type::FLOAT; }
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321 virtual uint ideal_reg() const { return Op_RegF; }
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322 };
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323
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324 //------------------------------AbsDNode---------------------------------------
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325 // Absolute value a double, a common float-point idiom with a cheap hardware
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326 // implemention on most chips. Since a naive graph involves control flow, we
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327 // "match" it in the ideal world (so the control flow can be removed).
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328 class AbsDNode : public AbsNode {
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329 public:
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330 AbsDNode( Node *in1 ) : AbsNode(in1) {}
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331 virtual int Opcode() const;
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332 const Type *bottom_type() const { return Type::DOUBLE; }
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333 virtual uint ideal_reg() const { return Op_RegD; }
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334 };
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335
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336
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337 //------------------------------CmpLTMaskNode----------------------------------
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338 // If p < q, return -1 else return 0. Nice for flow-free idioms.
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339 class CmpLTMaskNode : public Node {
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340 public:
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341 CmpLTMaskNode( Node *p, Node *q ) : Node(0, p, q) {}
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342 virtual int Opcode() const;
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343 const Type *bottom_type() const { return TypeInt::INT; }
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344 virtual uint ideal_reg() const { return Op_RegI; }
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345 };
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346
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347
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348 //------------------------------NegNode----------------------------------------
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349 class NegNode : public Node {
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350 public:
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351 NegNode( Node *in1 ) : Node(0,in1) {}
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352 };
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353
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354 //------------------------------NegFNode---------------------------------------
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355 // Negate value a float. Negating 0.0 returns -0.0, but subtracting from
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356 // zero returns +0.0 (per JVM spec on 'fneg' bytecode). As subtraction
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357 // cannot be used to replace negation we have to implement negation as ideal
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358 // node; note that negation and addition can replace subtraction.
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359 class NegFNode : public NegNode {
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360 public:
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361 NegFNode( Node *in1 ) : NegNode(in1) {}
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362 virtual int Opcode() const;
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363 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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364 const Type *bottom_type() const { return Type::FLOAT; }
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365 virtual uint ideal_reg() const { return Op_RegF; }
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366 };
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367
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368 //------------------------------NegDNode---------------------------------------
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369 // Negate value a double. Negating 0.0 returns -0.0, but subtracting from
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370 // zero returns +0.0 (per JVM spec on 'dneg' bytecode). As subtraction
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371 // cannot be used to replace negation we have to implement negation as ideal
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372 // node; note that negation and addition can replace subtraction.
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373 class NegDNode : public NegNode {
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374 public:
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375 NegDNode( Node *in1 ) : NegNode(in1) {}
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376 virtual int Opcode() const;
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377 virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
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378 const Type *bottom_type() const { return Type::DOUBLE; }
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379 virtual uint ideal_reg() const { return Op_RegD; }
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380 };
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381
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382 //------------------------------CosDNode---------------------------------------
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383 // Cosinus of a double
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384 class CosDNode : public Node {
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385 public:
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386 CosDNode( Node *in1 ) : Node(0, in1) {}
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387 virtual int Opcode() const;
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388 const Type *bottom_type() const { return Type::DOUBLE; }
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389 virtual uint ideal_reg() const { return Op_RegD; }
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390 virtual const Type *Value( PhaseTransform *phase ) const;
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391 };
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392
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393 //------------------------------CosDNode---------------------------------------
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394 // Sinus of a double
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395 class SinDNode : public Node {
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396 public:
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397 SinDNode( Node *in1 ) : Node(0, in1) {}
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398 virtual int Opcode() const;
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399 const Type *bottom_type() const { return Type::DOUBLE; }
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400 virtual uint ideal_reg() const { return Op_RegD; }
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401 virtual const Type *Value( PhaseTransform *phase ) const;
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402 };
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403
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404
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405 //------------------------------TanDNode---------------------------------------
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406 // tangens of a double
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407 class TanDNode : public Node {
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408 public:
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409 TanDNode(Node *in1 ) : Node(0, in1) {}
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410 virtual int Opcode() const;
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411 const Type *bottom_type() const { return Type::DOUBLE; }
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412 virtual uint ideal_reg() const { return Op_RegD; }
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413 virtual const Type *Value( PhaseTransform *phase ) const;
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414 };
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415
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416
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417 //------------------------------AtanDNode--------------------------------------
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418 // arcus tangens of a double
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419 class AtanDNode : public Node {
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420 public:
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421 AtanDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {}
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422 virtual int Opcode() const;
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423 const Type *bottom_type() const { return Type::DOUBLE; }
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424 virtual uint ideal_reg() const { return Op_RegD; }
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425 };
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426
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427
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428 //------------------------------SqrtDNode--------------------------------------
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429 // square root a double
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430 class SqrtDNode : public Node {
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431 public:
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432 SqrtDNode(Node *c, Node *in1 ) : Node(c, in1) {}
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433 virtual int Opcode() const;
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434 const Type *bottom_type() const { return Type::DOUBLE; }
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435 virtual uint ideal_reg() const { return Op_RegD; }
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436 virtual const Type *Value( PhaseTransform *phase ) const;
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437 };
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438
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439 //------------------------------ExpDNode---------------------------------------
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440 // Exponentiate a double
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441 class ExpDNode : public Node {
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442 public:
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443 ExpDNode( Node *c, Node *in1 ) : Node(c, in1) {}
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444 virtual int Opcode() const;
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445 const Type *bottom_type() const { return Type::DOUBLE; }
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446 virtual uint ideal_reg() const { return Op_RegD; }
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447 virtual const Type *Value( PhaseTransform *phase ) const;
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448 };
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449
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450 //------------------------------LogDNode---------------------------------------
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451 // Log_e of a double
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452 class LogDNode : public Node {
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453 public:
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454 LogDNode( Node *in1 ) : Node(0, in1) {}
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455 virtual int Opcode() const;
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456 const Type *bottom_type() const { return Type::DOUBLE; }
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457 virtual uint ideal_reg() const { return Op_RegD; }
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458 virtual const Type *Value( PhaseTransform *phase ) const;
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459 };
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460
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461 //------------------------------Log10DNode---------------------------------------
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462 // Log_10 of a double
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463 class Log10DNode : public Node {
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464 public:
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465 Log10DNode( Node *in1 ) : Node(0, in1) {}
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466 virtual int Opcode() const;
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467 const Type *bottom_type() const { return Type::DOUBLE; }
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468 virtual uint ideal_reg() const { return Op_RegD; }
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469 virtual const Type *Value( PhaseTransform *phase ) const;
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470 };
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471
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472 //------------------------------PowDNode---------------------------------------
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473 // Raise a double to a double power
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474 class PowDNode : public Node {
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475 public:
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476 PowDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {}
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477 virtual int Opcode() const;
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478 const Type *bottom_type() const { return Type::DOUBLE; }
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479 virtual uint ideal_reg() const { return Op_RegD; }
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480 virtual const Type *Value( PhaseTransform *phase ) const;
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481 };
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482
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483 //-------------------------------ReverseBytesINode--------------------------------
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484 // reverse bytes of an integer
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485 class ReverseBytesINode : public Node {
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486 public:
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487 ReverseBytesINode(Node *c, Node *in1) : Node(c, in1) {}
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488 virtual int Opcode() const;
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489 const Type *bottom_type() const { return TypeInt::INT; }
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490 virtual uint ideal_reg() const { return Op_RegI; }
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491 };
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492
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493 //-------------------------------ReverseBytesLNode--------------------------------
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494 // reverse bytes of a long
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495 class ReverseBytesLNode : public Node {
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496 public:
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497 ReverseBytesLNode(Node *c, Node *in1) : Node(c, in1) {}
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498 virtual int Opcode() const;
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499 const Type *bottom_type() const { return TypeLong::LONG; }
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500 virtual uint ideal_reg() const { return Op_RegL; }
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501 };
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