+@deftypefn {Target Hook} bool TARGET_VALID_OPTION_ATTRIBUTE_P (tree @var{fndecl}, tree @var{name}, tree @var{args}, int @var{flags})
+This hook is called to parse the @code{attribute(option("..."))}, and
+it allows the function to set different target machine compile time
+options for the current function that might be different than the
+options specified on the command line. The hook should return
+@code{true} if the options are valid.
+
+The hook should set the @var{DECL_FUNCTION_SPECIFIC_TARGET} field in
+the function declaration to hold a pointer to a target specific
+@var{struct cl_target_option} structure.
+@end deftypefn
+
+@deftypefn {Target Hook} void TARGET_OPTION_SAVE (struct cl_target_option *@var{ptr})
+This hook is called to save any additional target specific information
+in the @var{struct cl_target_option} structure for function specific
+options.
+@xref{Option file format}.
+@end deftypefn
+
+@deftypefn {Target Hook} void TARGET_OPTION_RESTORE (struct cl_target_option *@var{ptr})
+This hook is called to restore any additional target specific
+information in the @var{struct cl_target_option} structure for
+function specific options.
+@end deftypefn
+
+@deftypefn {Target Hook} void TARGET_OPTION_PRINT (struct cl_target_option *@var{ptr})
+This hook is called to print any additional target specific
+information in the @var{struct cl_target_option} structure for
+function specific options.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_OPTION_PRAGMA_PARSE (target @var{args})
+This target hook parses the options for @code{#pragma GCC option} to
+set the machine specific options for functions that occur later in the
+input stream. The options should be the same as handled by the
+@code{TARGET_VALID_OPTION_ATTRIBUTE_P} hook.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_CAN_INLINE_P (tree @var{caller}, tree @var{callee})
+This target hook returns @code{false} if the @var{caller} function
+cannot inline @var{callee}, based on target specific information. By
+default, inlining is not allowed if the callee function has function
+specific target options and the caller does not use the same options.
+@end deftypefn
+
+@node Emulated TLS
+@section Emulating TLS
+@cindex Emulated TLS
+
+For targets whose psABI does not provide Thread Local Storage via
+specific relocations and instruction sequences, an emulation layer is
+used. A set of target hooks allows this emulation layer to be
+configured for the requirements of a particular target. For instance
+the psABI may in fact specify TLS support in terms of an emulation
+layer.
+
+The emulation layer works by creating a control object for every TLS
+object. To access the TLS object, a lookup function is provided
+which, when given the address of the control object, will return the
+address of the current thread's instance of the TLS object.
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_GET_ADDRESS
+Contains the name of the helper function that uses a TLS control
+object to locate a TLS instance. The default causes libgcc's
+emulated TLS helper function to be used.
+@end deftypevr
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_REGISTER_COMMON
+Contains the name of the helper function that should be used at
+program startup to register TLS objects that are implicitly
+initialized to zero. If this is @code{NULL}, all TLS objects will
+have explicit initializers. The default causes libgcc's emulated TLS
+registration function to be used.
+@end deftypevr
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_VAR_SECTION
+Contains the name of the section in which TLS control variables should
+be placed. The default of @code{NULL} allows these to be placed in
+any section.
+@end deftypevr
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_TMPL_SECTION
+Contains the name of the section in which TLS initializers should be
+placed. The default of @code{NULL} allows these to be placed in any
+section.
+@end deftypevr
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_VAR_PREFIX
+Contains the prefix to be prepended to TLS control variable names.
+The default of @code{NULL} uses a target-specific prefix.
+@end deftypevr
+
+@deftypevr {Target Hook} {const char *} TARGET_EMUTLS_TMPL_PREFIX
+Contains the prefix to be prepended to TLS initializer objects. The
+default of @code{NULL} uses a target-specific prefix.
+@end deftypevr
+
+@deftypefn {Target Hook} tree TARGET_EMUTLS_VAR_FIELDS (tree @var{type}, tree *@var{name})
+Specifies a function that generates the FIELD_DECLs for a TLS control
+object type. @var{type} is the RECORD_TYPE the fields are for and
+@var{name} should be filled with the structure tag, if the default of
+@code{__emutls_object} is unsuitable. The default creates a type suitable
+for libgcc's emulated TLS function.
+@end deftypefn
+
+@deftypefn {Target Hook} tree TARGET_EMUTLS_VAR_INIT (tree @var{var}, tree @var{decl}, tree @var{tmpl_addr})
+Specifies a function that generates the CONSTRUCTOR to initialize a
+TLS control object. @var{var} is the TLS control object, @var{decl}
+is the TLS object and @var{tmpl_addr} is the address of the
+initializer. The default initializes libgcc's emulated TLS control object.
+@end deftypefn
+
+@deftypevr {Target Hook} {bool} TARGET_EMUTLS_VAR_ALIGN_FIXED
+Specifies whether the alignment of TLS control variable objects is
+fixed and should not be increased as some backends may do to optimize
+single objects. The default is false.
+@end deftypevr
+
+@deftypevr {Target Hook} {bool} TARGET_EMUTLS_DEBUG_FORM_TLS_ADDRESS
+Specifies whether a DWARF @code{DW_OP_form_tls_address} location descriptor
+may be used to describe emulated TLS control objects.
+@end deftypevr
+