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Add documentation for "mode" attribute for types.

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* doc/extend.texi (Common Variable Attributes): Move "mode" into
	alphabetical order.
	(Common Type Attributes): Add "mode" attribute.

From-SVN: r262561
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Paul Koning 2018-07-11 15:06:41 -04:00 committed by Paul Koning
parent 69e02b3555
commit bf8218dbef
2 changed files with 32 additions and 13 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-07-11 Paul Koning <ni1d@arrl.net>
* doc/extend.texi (Common Variable Attributes): Move "mode" into
alphabetical order.
(Common Type Attributes): Add "mode" attribute.
2018-07-11 Jan Hubicka <hubicka@ucw.cz>
* lto-streamer-out.c (DFS::DFS_write_tree_body): Do not

39
gcc/doc/extend.texi
View File

@ -6123,6 +6123,19 @@ types (@pxref{Common Function Attributes},
The message attached to the attribute is affected by the setting of
the @option{-fmessage-length} option.
@item mode (@var{mode})
@cindex @code{mode} variable attribute
This attribute specifies the data type for the declaration---whichever
type corresponds to the mode @var{mode}. This in effect lets you
request an integer or floating-point type according to its width.
@xref{Machine Modes,,, gccint, GNU Compiler Collection (GCC) Internals},
for a list of the possible keywords for @var{mode}.
You may also specify a mode of @code{byte} or @code{__byte__} to
indicate the mode corresponding to a one-byte integer, @code{word} or
@code{__word__} for the mode of a one-word integer, and @code{pointer}
or @code{__pointer__} for the mode used to represent pointers.
@item nonstring
@cindex @code{nonstring} variable attribute
The @code{nonstring} variable attribute specifies that an object or member
@ -6158,19 +6171,6 @@ int f (struct Data *pd, const char *s)
@}
@end smallexample
@item mode (@var{mode})
@cindex @code{mode} variable attribute
This attribute specifies the data type for the declaration---whichever
type corresponds to the mode @var{mode}. This in effect lets you
request an integer or floating-point type according to its width.
@xref{Machine Modes,,, gccint, GNU Compiler Collection (GCC) Internals},
for a list of the possible keywords for @var{mode}.
You may also specify a mode of @code{byte} or @code{__byte__} to
indicate the mode corresponding to a one-byte integer, @code{word} or
@code{__word__} for the mode of a one-word integer, and @code{pointer}
or @code{__pointer__} for the mode used to represent pointers.
@item packed
@cindex @code{packed} variable attribute
The @code{packed} attribute specifies that a variable or structure field
@ -7112,6 +7112,19 @@ declaration, the above program would abort when compiled with
@option{-fstrict-aliasing}, which is on by default at @option{-O2} or
above.
@item mode (@var{mode})
@cindex @code{mode} type attribute
This attribute specifies the data type for the declaration---whichever
type corresponds to the mode @var{mode}. This in effect lets you
request an integer or floating-point type according to its width.
@xref{Machine Modes,,, gccint, GNU Compiler Collection (GCC) Internals},
for a list of the possible keywords for @var{mode}.
You may also specify a mode of @code{byte} or @code{__byte__} to
indicate the mode corresponding to a one-byte integer, @code{word} or
@code{__word__} for the mode of a one-word integer, and @code{pointer}
or @code{__pointer__} for the mode used to represent pointers.
@item packed
@cindex @code{packed} type attribute
This attribute, attached to @code{struct} or @code{union} type