/* * Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
//------------------------------SUBNode---------------------------------------- // Class SUBTRACTION functionality. This covers all the usual 'subtract' // behaviors. Subtract-integer, -float, -double, binary xor, compare-integer, // -float, and -double are all inherited from this class. The compare // functions behave like subtract functions, except that all negative answers // are compressed into -1, and all positive answers compressed to 1. class SubNode : public Node { public:
SubNode( Node *in1, Node *in2 ) : Node(0,in1,in2) {
init_class_id(Class_Sub);
}
// Handle algebraic identities here. If we have an identity, return the Node // we are equivalent to. We look for "add of zero" as an identity. virtual Node* Identity(PhaseGVN* phase);
// Compute a new Type for this node. Basically we just do the pre-check, // then call the virtual add() to set the type. virtualconst Type* Value(PhaseGVN* phase) const; const Type* Value_common( PhaseTransform *phase ) const;
// Supplied function returns the subtractend of the inputs. // This also type-checks the inputs for sanity. Guaranteed never to // be passed a TOP or BOTTOM type, these are filtered out by a pre-check. virtualconst Type *sub( const Type *, const Type * ) const = 0;
// Supplied function to return the additive identity type. // This is returned whenever the subtracts inputs are the same. virtualconst Type *add_id() const = 0;
// NOTE: SubINode should be taken away and replaced by add and negate //------------------------------SubINode--------------------------------------- // Subtract 2 integers class SubINode : public SubNode { public:
SubINode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const; const Type *add_id() const { return TypeInt::ZERO; } const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------SubLNode--------------------------------------- // Subtract 2 integers class SubLNode : public SubNode { public:
SubLNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const; const Type *add_id() const { return TypeLong::ZERO; } const Type *bottom_type() const { return TypeLong::LONG; } virtual uint ideal_reg() const { return Op_RegL; }
};
// NOTE: SubFPNode should be taken away and replaced by add and negate //------------------------------SubFPNode-------------------------------------- // Subtract 2 floats or doubles class SubFPNode : public SubNode { protected:
SubFPNode( Node *in1, Node *in2 ) : SubNode(in1,in2) {} public: const Type* Value(PhaseGVN* phase) const;
};
// NOTE: SubFNode should be taken away and replaced by add and negate //------------------------------SubFNode--------------------------------------- // Subtract 2 doubles class SubFNode : public SubFPNode { public:
SubFNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const; const Type *add_id() const { return TypeF::ZERO; } const Type *bottom_type() const { return Type::FLOAT; } virtual uint ideal_reg() const { return Op_RegF; }
};
// NOTE: SubDNode should be taken away and replaced by add and negate //------------------------------SubDNode--------------------------------------- // Subtract 2 doubles class SubDNode : public SubFPNode { public:
SubDNode( Node *in1, Node *in2 ) : SubFPNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const; const Type *add_id() const { return TypeD::ZERO; } const Type *bottom_type() const { return Type::DOUBLE; } virtual uint ideal_reg() const { return Op_RegD; }
};
//------------------------------CmpINode--------------------------------------- // Compare 2 signed values, returning condition codes (-1, 0 or 1). class CmpINode : public CmpNode { public:
CmpINode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const; virtualconst Type* Value(PhaseGVN* phase) const;
};
//------------------------------CmpUNode--------------------------------------- // Compare 2 unsigned values (integer or pointer), returning condition codes (-1, 0 or 1). class CmpUNode : public CmpNode { public:
CmpUNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtualconst Type *sub( const Type *, const Type * ) const; const Type* Value(PhaseGVN* phase) const; bool is_index_range_check() const;
};
//------------------------------CmpU3Node-------------------------------------- // Compare 2 unsigned values, returning integer value (-1, 0 or 1). class CmpU3Node : public CmpUNode { public:
CmpU3Node( Node *in1, Node *in2 ) : CmpUNode(in1,in2) { // Since it is not consumed by Bools, it is not really a Cmp.
init_class_id(Class_Sub);
} virtualint Opcode() const; virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------CmpPNode--------------------------------------- // Compare 2 pointer values, returning condition codes (-1, 0 or 1). class CmpPNode : public CmpNode { public:
CmpPNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const;
};
//------------------------------CmpNNode-------------------------------------- // Compare 2 narrow oop values, returning condition codes (-1, 0 or 1). class CmpNNode : public CmpNode { public:
CmpNNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const;
};
//------------------------------CmpLNode--------------------------------------- // Compare 2 long values, returning condition codes (-1, 0 or 1). class CmpLNode : public CmpNode { public:
CmpLNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type *sub( const Type *, const Type * ) const;
};
//------------------------------CmpL3Node-------------------------------------- // Compare 2 long values, returning integer value (-1, 0 or 1). class CmpL3Node : public CmpLNode { public:
CmpL3Node( Node *in1, Node *in2 ) : CmpLNode(in1,in2) { // Since it is not consumed by Bools, it is not really a Cmp.
init_class_id(Class_Sub);
} virtualint Opcode() const; virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------CmpUL3Node------------------------------------- // Compare 2 unsigned long values, returning integer value (-1, 0 or 1). class CmpUL3Node : public CmpULNode { public:
CmpUL3Node( Node *in1, Node *in2 ) : CmpULNode(in1,in2) { // Since it is not consumed by Bools, it is not really a Cmp.
init_class_id(Class_Sub);
} virtualint Opcode() const; virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------CmpFNode--------------------------------------- // Compare 2 float values, returning condition codes (-1, 0 or 1). // This implements the Java bytecode fcmpl, so unordered returns -1. // Operands may not commute. class CmpFNode : public CmpNode { public:
CmpFNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtualconst Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; } const Type* Value(PhaseGVN* phase) const;
};
//------------------------------CmpF3Node-------------------------------------- // Compare 2 float values, returning integer value (-1, 0 or 1). // This implements the Java bytecode fcmpl, so unordered returns -1. // Operands may not commute. class CmpF3Node : public CmpFNode { public:
CmpF3Node( Node *in1, Node *in2 ) : CmpFNode(in1,in2) { // Since it is not consumed by Bools, it is not really a Cmp.
init_class_id(Class_Sub);
} virtualint Opcode() const; // Since it is not consumed by Bools, it is not really a Cmp. virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------CmpDNode--------------------------------------- // Compare 2 double values, returning condition codes (-1, 0 or 1). // This implements the Java bytecode dcmpl, so unordered returns -1. // Operands may not commute. class CmpDNode : public CmpNode { public:
CmpDNode( Node *in1, Node *in2 ) : CmpNode(in1,in2) {} virtualint Opcode() const; virtualconst Type *sub( const Type *, const Type * ) const { ShouldNotReachHere(); return NULL; } const Type* Value(PhaseGVN* phase) const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
};
//------------------------------CmpD3Node-------------------------------------- // Compare 2 double values, returning integer value (-1, 0 or 1). // This implements the Java bytecode dcmpl, so unordered returns -1. // Operands may not commute. class CmpD3Node : public CmpDNode { public:
CmpD3Node( Node *in1, Node *in2 ) : CmpDNode(in1,in2) { // Since it is not consumed by Bools, it is not really a Cmp.
init_class_id(Class_Sub);
} virtualint Opcode() const; virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------BoolTest--------------------------------------- // Convert condition codes to a boolean test value (0 or -1). // We pick the values as 3 bits; the low order 2 bits we compare against the // condition codes, the high bit flips the sense of the result. // For vector compares, additionally, the 4th bit indicates if the compare is unsigned struct BoolTest { enum mask { eq = 0, ne = 4, le = 5, ge = 7, lt = 3, gt = 1, overflow = 2, no_overflow = 6, never = 8, illegal = 9, // The following values are used with vector compares // A BoolTest value should not be constructed for such values
unsigned_compare = 16,
ule = unsigned_compare | le, uge = unsigned_compare | ge, ult = unsigned_compare | lt, ugt = unsigned_compare | gt };
mask _test;
BoolTest( mask btm ) : _test(btm) { assert((btm & unsigned_compare) == 0, "unsupported");} const Type *cc2logical( const Type *CC ) const; // Commute the test. I use a small table lookup. The table is created as // a simple char array where each element is the ASCII version of a 'mask' // enum from above.
mask commute( ) const { return mask("032147658"[_test]-'0'); }
mask negate( ) const { return mask(_test^4); } bool is_canonical( ) const { return (_test == BoolTest::ne || _test == BoolTest::lt || _test == BoolTest::le || _test == BoolTest::overflow); } bool is_less( ) const { return _test == BoolTest::lt || _test == BoolTest::le; } bool is_greater( ) const { return _test == BoolTest::gt || _test == BoolTest::ge; } void dump_on(outputStream *st) const;
mask merge(BoolTest other) const;
};
//------------------------------BoolNode--------------------------------------- // A Node to convert a Condition Codes to a Logical result. class BoolNode : public Node { virtual uint hash() const; virtualbool cmp( const Node &n ) const; virtual uint size_of() const;
// Try to optimize signed integer comparison
Node* fold_cmpI(PhaseGVN* phase, SubNode* cmp, Node* cmp1, int cmp_op, int cmp1_op, const TypeInt* cmp2_type); public: const BoolTest _test;
BoolNode(Node *cc, BoolTest::mask t): Node(NULL,cc), _test(t) {
init_class_id(Class_Bool);
} // Convert an arbitrary int value to a Bool or other suitable predicate. static Node* make_predicate(Node* test_value, PhaseGVN* phase); // Convert self back to an integer value.
Node* as_int_value(PhaseGVN* phase); // Invert sense of self, returning new Bool.
BoolNode* negate(PhaseGVN* phase); virtualint Opcode() const; virtual Node *Ideal(PhaseGVN *phase, bool can_reshape); virtualconst Type* Value(PhaseGVN* phase) const; virtualconst Type *bottom_type() const { return TypeInt::BOOL; }
uint match_edge(uint idx) const { return 0; } virtual uint ideal_reg() const { return Op_RegI; }
//------------------------------AbsNode---------------------------------------- // Abstract class for absolute value. Mostly used to get a handy wrapper // for finding this pattern in the graph. class AbsNode : public Node { public:
AbsNode( Node *value ) : Node(0,value) {} virtual Node* Identity(PhaseGVN* phase); virtual Node* Ideal(PhaseGVN* phase, bool can_reshape); virtualconst Type* Value(PhaseGVN* phase) const;
};
//------------------------------AbsINode--------------------------------------- // Absolute value an integer. Since a naive graph involves control flow, we // "match" it in the ideal world (so the control flow can be removed). class AbsINode : public AbsNode { public:
AbsINode( Node *in1 ) : AbsNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------AbsLNode--------------------------------------- // Absolute value a long. Since a naive graph involves control flow, we // "match" it in the ideal world (so the control flow can be removed). class AbsLNode : public AbsNode { public:
AbsLNode( Node *in1 ) : AbsNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeLong::LONG; } virtual uint ideal_reg() const { return Op_RegL; }
};
//------------------------------AbsFNode--------------------------------------- // Absolute value a float, a common float-point idiom with a cheap hardware // implementation on most chips. Since a naive graph involves control flow, we // "match" it in the ideal world (so the control flow can be removed). class AbsFNode : public AbsNode { public:
AbsFNode( Node *in1 ) : AbsNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return Type::FLOAT; } virtual uint ideal_reg() const { return Op_RegF; }
};
//------------------------------AbsDNode--------------------------------------- // Absolute value a double, a common float-point idiom with a cheap hardware // implementation on most chips. Since a naive graph involves control flow, we // "match" it in the ideal world (so the control flow can be removed). class AbsDNode : public AbsNode { public:
AbsDNode( Node *in1 ) : AbsNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return Type::DOUBLE; } virtual uint ideal_reg() const { return Op_RegD; }
};
//------------------------------CmpLTMaskNode---------------------------------- // If p < q, return -1 else return 0. Nice for flow-free idioms. class CmpLTMaskNode : public Node { public:
CmpLTMaskNode( Node *p, Node *q ) : Node(0, p, q) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------NegNode---------------------------------------- class NegNode : public Node { public:
NegNode( Node *in1 ) : Node(0,in1) {}
};
//------------------------------NegINode--------------------------------------- // Negate value an int. For int values, negation is the same as subtraction // from zero class NegINode : public NegNode { public:
NegINode(Node *in1) : NegNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//------------------------------NegLNode--------------------------------------- // Negate value an int. For int values, negation is the same as subtraction // from zero class NegLNode : public NegNode { public:
NegLNode(Node *in1) : NegNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeLong::LONG; } virtual uint ideal_reg() const { return Op_RegL; }
};
//------------------------------NegFNode--------------------------------------- // Negate value a float. Negating 0.0 returns -0.0, but subtracting from // zero returns +0.0 (per JVM spec on 'fneg' bytecode). As subtraction // cannot be used to replace negation we have to implement negation as ideal // node; note that negation and addition can replace subtraction. class NegFNode : public NegNode { public:
NegFNode( Node *in1 ) : NegNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return Type::FLOAT; } virtual uint ideal_reg() const { return Op_RegF; }
};
//------------------------------NegDNode--------------------------------------- // Negate value a double. Negating 0.0 returns -0.0, but subtracting from // zero returns +0.0 (per JVM spec on 'dneg' bytecode). As subtraction // cannot be used to replace negation we have to implement negation as ideal // node; note that negation and addition can replace subtraction. class NegDNode : public NegNode { public:
NegDNode( Node *in1 ) : NegNode(in1) {} virtualint Opcode() const; const Type *bottom_type() const { return Type::DOUBLE; } virtual uint ideal_reg() const { return Op_RegD; }
};
//------------------------------AtanDNode-------------------------------------- // arcus tangens of a double class AtanDNode : public Node { public:
AtanDNode(Node *c, Node *in1, Node *in2 ) : Node(c, in1, in2) {} virtualint Opcode() const; const Type *bottom_type() const { return Type::DOUBLE; } virtual uint ideal_reg() const { return Op_RegD; }
};
//------------------------------SqrtFNode-------------------------------------- // square root a float class SqrtFNode : public Node { public:
SqrtFNode(Compile* C, Node *c, Node *in1) : Node(c, in1) {
init_flags(Flag_is_expensive); if (c != NULL) { // Treat node only as expensive if a control input is set because it might // be created from a SqrtDNode in ConvD2FNode::Ideal() that was found to // be unique and therefore has no control input.
C->add_expensive_node(this);
}
} virtualint Opcode() const; const Type *bottom_type() const { return Type::FLOAT; } virtual uint ideal_reg() const { return Op_RegF; } virtualconst Type* Value(PhaseGVN* phase) const;
};
//-------------------------------ReverseBytesINode-------------------------------- // reverse bytes of an integer class ReverseBytesINode : public Node { public:
ReverseBytesINode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//-------------------------------ReverseBytesLNode-------------------------------- // reverse bytes of a long class ReverseBytesLNode : public Node { public:
ReverseBytesLNode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeLong::LONG; } virtual uint ideal_reg() const { return Op_RegL; }
};
//-------------------------------ReverseBytesUSNode-------------------------------- // reverse bytes of an unsigned short / char class ReverseBytesUSNode : public Node { public:
ReverseBytesUSNode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::CHAR; } virtual uint ideal_reg() const { return Op_RegI; }
};
//-------------------------------ReverseBytesSNode-------------------------------- // reverse bytes of a short class ReverseBytesSNode : public Node { public:
ReverseBytesSNode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::SHORT; } virtual uint ideal_reg() const { return Op_RegI; }
};
//-------------------------------ReverseINode-------------------------------- // reverse bits of an int class ReverseINode : public Node { public:
ReverseINode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeInt::INT; } virtual uint ideal_reg() const { return Op_RegI; } virtual Node* Identity(PhaseGVN* phase); virtualconst Type* Value(PhaseGVN* phase) const;
};
//-------------------------------ReverseLNode-------------------------------- // reverse bits of a long class ReverseLNode : public Node { public:
ReverseLNode(Node *c, Node *in1) : Node(c, in1) {} virtualint Opcode() const; const Type *bottom_type() const { return TypeLong::LONG; } virtual uint ideal_reg() const { return Op_RegL; } virtual Node* Identity(PhaseGVN* phase); virtualconst Type* Value(PhaseGVN* phase) const;
};
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.