+2014-05-23 Paul Eggert <eggert@cs.ucla.edu>
+
+ PR other/56955
+ * doc/extend.texi (Function Attributes): Fix __attribute__ ((malloc))
+ documentation; the old documentation didn't clearly state the
+ constraints on the contents of the pointed-to storage.
+
2014-05-23 Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
Fix bootstrap error on ia64
@item malloc
@cindex @code{malloc} attribute
-The @code{malloc} attribute is used to tell the compiler that a function
-may be treated as if any non-@code{NULL} pointer it returns cannot
-alias any other pointer valid when the function returns and that the memory
-has undefined content.
-This often improves optimization.
-Standard functions with this property include @code{malloc} and
-@code{calloc}. @code{realloc}-like functions do not have this
-property as the memory pointed to does not have undefined content.
+This tells the compiler that a function is @code{malloc}-like, i.e.,
+that the pointer @var{P} returned by the function cannot alias any
+other pointer valid when the function returns, and moreover no
+pointers to valid objects occur in any storage addressed by @var{P}.
+
+Using this attribute can improve optimization. Functions like
+@code{malloc} and @code{calloc} have this property because they return
+a pointer to uninitialized or zeroed-out storage. However, functions
+like @code{realloc} do not have this property, as they can return a
+pointer to storage containing pointers.
@item mips16/nomips16
@cindex @code{mips16} attribute