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* doc/invoke.texi (Warning Options): Document -Winvalid-memory-model.

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From-SVN: r232070
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Martin Sebor 2016-01-05 02:53:10 +00:00 committed by Martin Sebor
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@ -1,3 +1,7 @@
2016-01-04 Martin Sebor <msebor@redhat.com>
* doc/invoke.texi (Warning Options): Document -Winvalid-memory-model.
2016-01-04 Michael Meissner <meissner@linux.vnet.ibm.com>
* config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Add

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gcc/doc/invoke.texi
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@ -260,7 +260,7 @@ Objective-C and Objective-C++ Dialects}.
-Wignored-qualifiers -Wincompatible-pointer-types @gol
-Wimplicit -Wimplicit-function-declaration -Wimplicit-int @gol
-Winit-self -Winline -Wno-int-conversion @gol
-Wno-int-to-pointer-cast -Wno-invalid-offsetof @gol
-Wno-int-to-pointer-cast -Winvalid-memory-model -Wno-invalid-offsetof @gol
-Winvalid-pch -Wlarger-than=@var{len} @gol
-Wlogical-op -Wlogical-not-parentheses -Wlong-long @gol
-Wmain -Wmaybe-uninitialized -Wmemset-transposed-args @gol
@ -4305,6 +4305,26 @@ to compute a value that itself is never used, because such
computations may be deleted by data flow analysis before the warnings
are printed.
@item -Winvalid-memory-model
@opindex Winvalid-memory-model
@opindex Wno-invalid-memory-model
Warn for invocations of @ref{__atomic Builtins}, @ref{__sync Builtins},
and the C11 atomic generic functions with a memory consistency argument
that is either invalid for the operation or outside the range of values
of the @code{memory_order} enumeration. For example, since the
@code{__atomic_store} and @code{__atomic_store_n} built-ins are only
defined for the relaxed, release, and sequentially consistent memory
orders the following code is diagnosed:
@smallexample
void store (int *i)
@{
__atomic_store_n (i, 0, memory_order_consume);
@}
@end smallexample
@option{-Winvalid-memory-model} is enabled by default.
@item -Wmaybe-uninitialized
@opindex Wmaybe-uninitialized
@opindex Wno-maybe-uninitialized