Class: LLVM::Type

Inherits:
Object
  • Object
show all
Includes:
PointerIdentity
Defined in:
lib/llvm/core/type.rb

Direct Known Subclasses

FunctionType, IntType, StructType

Class Method Summary collapse

Instance Method Summary collapse

Methods included from PointerIdentity

#==, #eql?, #hash, #to_ptr

Class Method Details

.array(ty, sz = 0) ⇒ Object

Creates an array type of Type with the given size.


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# File 'lib/llvm/core/type.rb', line 63

def self.array(ty, sz = 0)
  from_ptr(C.array_type(LLVM::Type(ty), sz), :array)
end

.from_ptr(ptr, kind) ⇒ Object


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# File 'lib/llvm/core/type.rb', line 6

def self.from_ptr(ptr, kind)
  return if ptr.null?
  kind ||= C.get_type_kind(ptr)
  ty = case kind
  when :integer  then IntType.allocate
  when :function then FunctionType.allocate
  when :struct   then StructType.allocate
  else allocate
  end
  ty.instance_variable_set(:@ptr, ptr)
  ty.instance_variable_set(:@kind, kind)
  ty
end

.function(arg_types, result_type, options = {}) ⇒ Object

Creates a function type. Takes an array of argument Types and the result Type. The only option is :varargs, which when set to true makes the function type take a variable number of args.


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# File 'lib/llvm/core/type.rb', line 79

def self.function(arg_types, result_type, options = {})
  arg_types.map! { |ty| LLVM::Type(ty) }
  arg_types_ptr = FFI::MemoryPointer.new(FFI.type_size(:pointer) * arg_types.size)
  arg_types_ptr.write_array_of_pointer(arg_types)
  from_ptr(C.function_type(LLVM::Type(result_type), arg_types_ptr, arg_types.size, options[:varargs] ? 1 : 0), :function)
end

.pointer(ty, address_space = 0) ⇒ Object

Creates the pointer type of Type with the given address space.


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# File 'lib/llvm/core/type.rb', line 68

def self.pointer(ty, address_space = 0)
  from_ptr(C.pointer_type(LLVM::Type(ty), address_space), :pointer)
end

.recObject


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# File 'lib/llvm/core/type.rb', line 105

def self.rec
  h = opaque
  ty = yield h
  h.refine(ty)
  ty
end

.struct(elt_types, is_packed, name = nil) ⇒ Object

Creates a struct type with the given array of element types.


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# File 'lib/llvm/core/type.rb', line 87

def self.struct(elt_types, is_packed, name = nil)
  elt_types.map! { |ty| LLVM::Type(ty) }
  elt_types_ptr = FFI::MemoryPointer.new(FFI.type_size(:pointer) * elt_types.size)
  elt_types_ptr.write_array_of_pointer(elt_types)
  if name
    struct = from_ptr(C.struct_create_named(Context.global, name), :struct)
    C.struct_set_body(struct, elt_types_ptr, elt_types.size, is_packed ? 1 : 0) unless elt_types.empty?
    struct
  else
    from_ptr(C.struct_type(elt_types_ptr, elt_types.size, is_packed ? 1 : 0), :struct)
  end
end

.vector(ty, element_count) ⇒ Object

Creates a vector type of Type with the given element count.


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# File 'lib/llvm/core/type.rb', line 73

def self.vector(ty, element_count)
  from_ptr(C.vector_type(LLVM::Type(ty), element_count), :vector)
end

.voidObject

Creates a void type.


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# File 'lib/llvm/core/type.rb', line 101

def self.void
  from_ptr(C.void_type, :void)
end

Instance Method Details

#alignObject


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# File 'lib/llvm/core/type.rb', line 30

def align
  LLVM::Int64.from_ptr(C.align_of(self))
end

#dumpObject

Print the type's representation to stdout.


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# File 'lib/llvm/core/type.rb', line 58

def dump
  C.dump_type(self)
end

#element_typeObject

Returns the type of this types elements (works only for Pointer, Vector, and Array types.)


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# File 'lib/llvm/core/type.rb', line 35

def element_type
  case self.kind
  when :pointer, :vector, :array
    Type.from_ptr(C.get_element_type(self), nil)
  end
end

#kindObject

Returns a symbol representation of the types kind (ex. :pointer, :vector, :array.)


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# File 'lib/llvm/core/type.rb', line 21

def kind
  @kind
end

#nullObject

Returns a null ConstantExpr of this type.


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# File 'lib/llvm/core/type.rb', line 48

def null
  ConstantExpr.from_ptr(C.const_null(self))
end

#null_pointerObject

Returns a null pointer ConstantExpr of this type.


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# File 'lib/llvm/core/type.rb', line 43

def null_pointer
  ConstantExpr.from_ptr(C.const_pointer_null(self))
end

#pointer(address_space = 0) ⇒ Object

Creates a pointer type with this type and the given address space.


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# File 'lib/llvm/core/type.rb', line 53

def pointer(address_space = 0)
  Type.pointer(self, address_space)
end

#sizeObject

Returns the size of the type.


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# File 'lib/llvm/core/type.rb', line 26

def size
  LLVM::Int64.from_ptr(C.size_of(self))
end