than C@. If you do not define this macro, then the value of
@code{CPP_SPEC} (if any) will be used instead.
-@findex NO_BUILTIN_SIZE_TYPE
-@item NO_BUILTIN_SIZE_TYPE
-If this macro is defined, the preprocessor will not define the built-in macro
-@code{__SIZE_TYPE__}. The macro @code{__SIZE_TYPE__} must then be defined
-by @code{CPP_SPEC} instead.
-
-This should be defined if @code{SIZE_TYPE} depends on target dependent flags
-which are not accessible to the preprocessor. Otherwise, it should not
-be defined.
-
-@findex NO_BUILTIN_PTRDIFF_TYPE
-@item NO_BUILTIN_PTRDIFF_TYPE
-If this macro is defined, the preprocessor will not define the built-in macro
-@code{__PTRDIFF_TYPE__}. The macro @code{__PTRDIFF_TYPE__} must then be
-defined by @code{CPP_SPEC} instead.
-
-This should be defined if @code{PTRDIFF_TYPE} depends on target dependent flags
-which are not accessible to the preprocessor. Otherwise, it should not
-be defined.
-
-@findex NO_BUILTIN_WCHAR_TYPE
-@item NO_BUILTIN_WCHAR_TYPE
-If this macro is defined, the preprocessor will not define the built-in macro
-@code{__WCHAR_TYPE__}. The macro @code{__WCHAR_TYPE__} must then be
-defined by @code{CPP_SPEC} instead.
-
-This should be defined if @code{WCHAR_TYPE} depends on target dependent flags
-which are not accessible to the preprocessor. Otherwise, it should not
-be defined.
-
-@findex NO_BUILTIN_WINT_TYPE
-@item NO_BUILTIN_WINT_TYPE
-If this macro is defined, the preprocessor will not define the built-in macro
-@code{__WINT_TYPE__}. The macro @code{__WINT_TYPE__} must then be
-defined by @code{CPP_SPEC} instead.
-
-This should be defined if @code{WINT_TYPE} depends on target dependent flags
-which are not accessible to the preprocessor. Otherwise, it should not
-be defined.
-
@findex CC1_SPEC
@item CC1_SPEC
A C string constant that tells the GCC driver program options to
Here are run-time target specifications.
@table @code
+@findex TARGET_CPU_CPP_BUILTINS
+@item TARGET_CPU_CPP_BUILTINS()
+This function-like macro expands to a block of code that defines
+built-in preprocessor macros and assertions for the target cpu, using
+the functions @code{builtin_macro}, @code{builtin_macro_std} and
+@code{builtin_assert} declared in @file{c-lex.h}. When the front end
+calls this macro it provides a trailing semicolon, and since it has
+finished command line option processing your code can use those
+results freely.
+
+@code{builtin_assert} takes a string in the form you pass to the
+command-line option @option{-A}, such as @code{cpu=mips}, and creates
+the assertion. @code{builtin_macro} takes a string in the form
+accepted by option @option{-D} and unconditionally defines the macro.
+
+@code{builtin_macro_std} takes a string representing the name of an
+object-like macro. If it doesn't lie in the user's namespace,
+@code{builtin_macro_std} defines it unconditionally. Otherwise, it
+defines a version with two leading underscores, and another version
+with two leading and trailing underscores, and defines the original
+only if an ISO standard was not requested on the command line. For
+example, passing @code{unix} defines @code{__unix}, @code{__unix__}
+and possibly @code{unix}; passing @code{_mips} defines @code{__mips},
+@code{__mips__} and possibly @code{_mips}, and passing @code{_ABI64}
+defines only @code{_ABI64}.
+
+With @code{TARGET_OS_CPP_BUILTINS} this macro obsoletes the
+@code{CPP_PREDEFINES} target macro.
+
+@findex TARGET_OS_CPP_BUILTINS
+@item TARGET_OS_CPP_BUILTINS()
+Similarly to @code{TARGET_CPU_CPP_BUILTINS} but this macro is optional
+and is used for the target operating system instead.
+
+With @code{TARGET_CPU_CPP_BUILTINS} this macro obsoletes the
+@code{CPP_PREDEFINES} target macro.
+
@findex CPP_PREDEFINES
@item CPP_PREDEFINES
Define this to be a string constant containing @option{-D} options to
target machine. If you don't define this, the default is
@code{BITS_PER_UNIT}.
-@findex MAX_CHAR_TYPE_SIZE
-@item MAX_CHAR_TYPE_SIZE
-Maximum number for the size in bits of the type @code{char} on the
-target machine. If this is undefined, the default is
-@code{CHAR_TYPE_SIZE}. Otherwise, it is the constant value that is the
-largest value that @code{CHAR_TYPE_SIZE} can have at run-time. This is
-used in @code{cpp}.
-
@findex BOOL_TYPE_SIZE
@item BOOL_TYPE_SIZE
-A C expression for the size in bits of the C++ type @code{bool} on the
-target machine. If you don't define this, the default is
-@code{CHAR_TYPE_SIZE}.
+A C expression for the size in bits of the C++ type @code{bool} and
+C99 type @code{_Bool} on the target machine. If you don't define
+this, and you probably shouldn't, the default is @code{CHAR_TYPE_SIZE}.
@findex FLOAT_TYPE_SIZE
@item FLOAT_TYPE_SIZE
@option{-fsched-verbose-@var{n}}.
@end deftypefn
-@deftypefn {Target Hook} rtx TARGET_SCHED_CYCLE_DISPLAY (int @var{clock}, rtx @var{last})
-This hook is called in verbose mode only, at the beginning of each pass
-over a basic block. It should insert an insn into the chain after
-@var{last}, which has no effect, but records the value @var{clock} in
-RTL dumps and assembly output. Define this hook only if you need this
-level of detail about what the scheduler is doing.
-@end deftypefn
-
@deftypefn {Target Hook} int TARGET_SCHED_USE_DFA_PIPELINE_INTERFACE (void)
This hook is called many times during insn scheduling. If the hook
returns nonzero, the automaton based pipeline description is used for
is enough. The MIPS port uses this to sort all functions after all data
declarations.
+@findex HOT_TEXT_SECTION_NAME
+@item HOT_TEXT_SECTION_NAME
+If defined, a C string constant for the name of the section containing most
+frequently executed functions of the program. If not defined, GCC will provide
+a default definition if the target supports named sections.
+
+@findex UNLIKELY_EXECUTED_TEXT_SECTION_NAME
+@item UNLIKELY_EXECUTED_TEXT_SECTION_NAME
+If defined, a C string constant for the name of the section containing unlikely
+executed functions in the program.
+
@findex DATA_SECTION_ASM_OP
@item DATA_SECTION_ASM_OP
A C expression whose value is a string, including spacing, containing the
assembler operation to identify the following data as writable initialized
data. Normally @code{"\t.data"} is right.
+@findex READONLY_DATA_SECTION_ASM_OP
+@item READONLY_DATA_SECTION_ASM_OP
+A C expression whose value is a string, including spacing, containing the
+assembler operation to identify the following data as read-only initialized
+data.
+
+@findex READONLY_DATA_SECTION
+@item READONLY_DATA_SECTION
+A macro naming a function to call to switch to the proper section for
+read-only data. The default is to use @code{READONLY_DATA_SECTION_ASM_OP}
+if defined, else fall back to @code{text_section}.
+
+The most common definition will be @code{data_section}, if the target
+does not have a special read-only data section, and does not put data
+in the text section.
+
@findex SHARED_SECTION_ASM_OP
@item SHARED_SECTION_ASM_OP
If defined, a C expression whose value is a string, including spacing,
@code{data_section}, for your additional sections. Do not define this
macro if you do not define @code{EXTRA_SECTIONS}.
-@findex READONLY_DATA_SECTION
-@item READONLY_DATA_SECTION
-On most machines, read-only variables, constants, and jump tables are
-placed in the text section. If this is not the case on your machine,
-this macro should be defined to be the name of a function (either
-@code{data_section} or a function defined in @code{EXTRA_SECTIONS}) that
-switches to the section to be used for read-only items.
-
-If these items should be placed in the text section, this macro should
-not be defined.
-
-@findex SELECT_SECTION
-@item SELECT_SECTION (@var{exp}, @var{reloc}, @var{align})
-A C statement or statements to switch to the appropriate section for
-output of @var{exp}. You can assume that @var{exp} is either a
-@code{VAR_DECL} node or a constant of some sort. @var{reloc}
-indicates whether the initial value of @var{exp} requires link-time
-relocations. Bit 1 is set when variable contains local relocations
-only, while bit 2 is set for global relocations.
-Select the section by calling @code{text_section} or one
-of the alternatives for other sections. @var{align} is the constant
-alignment in bits.
-
-Do not define this macro if you put all read-only variables and
-constants in the read-only data section (usually the text section).
-
-@findex SELECT_RTX_SECTION
-@item SELECT_RTX_SECTION (@var{mode}, @var{rtx}, @var{align})
-A C statement or statements to switch to the appropriate section for
-output of @var{rtx} in mode @var{mode}. You can assume that @var{rtx}
-is some kind of constant in RTL@. The argument @var{mode} is redundant
-except in the case of a @code{const_int} rtx. Select the section by
-calling @code{text_section} or one of the alternatives for other
-sections. @var{align} is the constant alignment in bits.
-
-Do not define this macro if you put all constants in the read-only
-data section.
-
@findex JUMP_TABLES_IN_TEXT_SECTION
@item JUMP_TABLES_IN_TEXT_SECTION
Define this macro to be an expression with a nonzero value if jump
Decode @var{sym_name} and store the real name part in @var{var}, sans
the characters that encode section info. Define this macro if
@code{ENCODE_SECTION_INFO} alters the symbol's name string.
-
-@findex UNIQUE_SECTION
-@item UNIQUE_SECTION (@var{decl}, @var{reloc})
-A C statement to build up a unique section name, expressed as a
-@code{STRING_CST} node, and assign it to @samp{DECL_SECTION_NAME (@var{decl})}.
-@var{reloc} indicates whether the initial value of @var{exp} requires
-link-time relocations. If you do not define this macro, GCC will use
-the symbol name prefixed by @samp{.} as the section name. Note - this
-macro can now be called for uninitialized data items as well as
-initialized data and functions.
@end table
+@deftypefn {Target Hook} void TARGET_ASM_SELECT_SECTION (tree @var{exp}, int @var{reloc}, unsigned HOST_WIDE_INT @var{align})
+Switches to the appropriate section for output of @var{exp}. You can
+assume that @var{exp} is either a @code{VAR_DECL} node or a constant of
+some sort. @var{reloc} indicates whether the initial value of @var{exp}
+requires link-time relocations. Bit 0 is set when variable contains
+local relocations only, while bit 1 is set for global relocations.
+Select the section by calling @code{data_section} or one of the
+alternatives for other sections. @var{align} is the constant alignment
+in bits.
+
+The default version of this function takes care of putting read-only
+variables in @code{readonly_data_section}.
+@end deftypefn
+
+@deftypefn {Target Hook} void TARGET_ASM_UNIQUE_SECTION (tree @var{decl}, int @var{reloc})
+Build up a unique section name, expressed as a @code{STRING_CST} node,
+and assign it to @samp{DECL_SECTION_NAME (@var{decl})}.
+As with @code{TARGET_ASM_SELECT_SECTION}, @var{reloc} indicates whether
+the initial value of @var{exp} requires link-time relocations.
+
+The default version of this function appends the symbol name to the
+ELF section name that would normally be used for the symbol. For
+example, the function @code{foo} would be placed in @code{.text.foo}.
+Whatever the actual target object format, this is often good enough.
+@end deftypefn
+
+@deftypefn {Target Hook} void TARGET_ASM_SELECT_RTX_SECTION (enum machine_mode @var{mode}, rtx @var{x}, unsigned HOST_WIDE_INT @var{align})
+Switches to the appropriate section for output of constant pool entry
+@var{x} in @var{mode}. You can assume that @var{x} is some kind of
+constant in RTL@. The argument @var{mode} is redundant except in the
+case of a @code{const_int} rtx. Select the section by calling
+@code{readonly_data_section} or one of the alternatives for other
+sections. @var{align} is the constant alignment in bits.
+
+The default version of this function takes care of putting symbolic
+constants in @code{flag_pic} mode in @code{data_section} and everything
+else in @code{readonly_data_section}.
+@end deftypefn
+
@node PIC
@section Position Independent Code
@cindex position independent code
OSDN Git Service
