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re PR c/21160 (documentation for -Wuninitialized out of date)

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PR c/21160
	* doc/invoke.texi (-Wuninitialized): Update documentation.

From-SVN: r99478
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Joseph Myers 2005-05-10 00:51:49 +01:00 committed by Joseph Myers
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2 changed files with 12 additions and 5 deletions
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@ -1,3 +1,8 @@
2005-05-09 Joseph S. Myers <joseph@codesourcery.com>
PR c/21160
* doc/invoke.texi (-Wuninitialized): Update documentation.
2005-05-09 Richard Earnshaw <richard.earnshaw@arm.com>
* arm.c (const_ok_for_arm): Use a faster algorithm.

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gcc/doc/invoke.texi
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@ -2565,11 +2565,13 @@ get these warnings.
If you want to warn about code which uses the uninitialized value of the
variable in its own initializer, use the @option{-Winit-self} option.
These warnings occur only for variables that are candidates for
register allocation. Therefore, they do not occur for a variable that
is declared @code{volatile}, or whose address is taken, or whose size
is other than 1, 2, 4 or 8 bytes. Also, they do not occur for
structures, unions or arrays, even when they are in registers.
These warnings occur for individual uninitialized or clobbered
elements of structure, union or array variables as well as for
variables which are uninitialized or clobbered as a whole. They do
not occur for variables or elements declared @code{volatile}. Because
these warnings depend on optimization, the exact variables or elements
for which there are warnings will depend on the precise optimization
options and version of GCC used.
Note that there may be no warning about a variable that is used only
to compute a value that itself is never used, because such