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docs/source/doc/values.rst

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++-----------------+
+| layout: page    |
++-----------------+
+| title: Values   |
++-----------------+
+
+`llvm.core.Value <llvm.core.Value.html>`_ is the base class of all
+values computed by a program that may be used as operands to other
+values. A value has a type associated with it (an object of
+`llvm.core.Type <types.html>`_).
+
+The class hierarchy is:
+
+::
+
+    Value
+      User
+        Constant
+          ConstantExpr
+          ConstantAggregateZero
+          ConstantInt
+          ConstantFP
+          ConstantArray
+          ConstantStruct
+          ConstantVector
+          ConstantPointerNull
+          UndefValue
+          GlobalValue
+            GlobalVariable
+            Function
+        Instruction
+          CallOrInvokeInstruction
+          PHINode
+          SwitchInstruction
+          CompareInstruction
+      Argument
+      BasicBlock
+
+The `Value <llvm.core.Value.html>`_ class is abstract, it's not meant to
+be instantiated. `User <llvm.core.User.html>`_ is a
+`Value <llvm.core.Value.html>`_ that in turn uses (i.e., can refer to)
+other values (for e.g., a constant expression 1+2 refers to two constant
+values 1 and 2).
+
+`Constant <llvm.core.Constant.html>`_-s represent constants that appear
+within code or as initializers of globals. They are constructed using
+static methods of `Constant <llvm.core.Constant.html>`_. Various types
+of constants are represented by various subclasses of
+`Constant <llvm.core.Constant.html>`_. However, most of them are empty
+and do not provide any additional attributes or methods over
+`Constant <llvm.core.Constant.html>`_.
+
+The `Function <functions.html>`_ object represents an instance of a
+function type. Such objects contain
+`Argument <llvm.core.Argument.html>`_ objects, which represent the
+actual, local-variable-like arguments of the function (not to be
+confused with the arguments returned by a function *type* object --
+these represent the *type* of the arguments).
+
+The various `Instruction <llvm.core.Instruction.html>`_-s are created by
+the `Builder <llvm.core.Builder.html>`_ class. Most instructions are
+represented by `Instruction <llvm.core.Instruction.html>`_ itself, but
+there are a few subclasses that represent interesting instructions.
+
+`Value <llvm.core.Value.html>`_ objects have a type (read-only), and a
+name (read-write).
+
+**Related Links** `functions <functions.html>`_,
+`comparision <comparision.html>`_,
+`llvm.core.Value <llvm.core.Value.html>`_,
+`llvm.core.User <llvm.core.User.html>`_,
+`llvm.core.Constant <llvm.core.Constant.html>`_,
+`llvm.core.GlobalValue <llvm.core.GlobalValue.html>`_,
+`llvm.core.GlobalVariable <llvm.core.GlobalVariable.html>`_,
+`llvm.core.Argument <llvm.core.Argument.html>`_,
+`llvm.core.Instruction <llvm.core.Instruction.html>`_,
+`llvm.core.Builder <llvm.core.Builder.html>`_,
+`llvm.core.BasicBlock <llvm.core.BasicBlock.html>`_