On Thu, Jan 18, 2018 at 3:07 PM, Richard Earnshaw (lists)
wrote:
> On 18/01/18 12:44, Richard Biener wrote:
>> On Wed, Jan 17, 2018 at 3:55 PM, Richard Earnshaw
>> wrote:
>>>
>>> This patch adds generic support for the new builtin
>>> __builtin_speculation_safe_load. It provides the overloading
On 18/01/18 12:44, Richard Biener wrote:
> On Wed, Jan 17, 2018 at 3:55 PM, Richard Earnshaw
> wrote:
>>
>> This patch adds generic support for the new builtin
>> __builtin_speculation_safe_load. It provides the overloading of the
>> different access sizes and a default fall-back expansion for ta
On Thu, Jan 18, 2018 at 1:44 PM, Richard Biener
wrote:
> On Wed, Jan 17, 2018 at 3:55 PM, Richard Earnshaw
> wrote:
>>
>> This patch adds generic support for the new builtin
>> __builtin_speculation_safe_load. It provides the overloading of the
>> different access sizes and a default fall-back e
On Wed, Jan 17, 2018 at 3:55 PM, Richard Earnshaw
wrote:
>
> This patch adds generic support for the new builtin
> __builtin_speculation_safe_load. It provides the overloading of the
> different access sizes and a default fall-back expansion for targets
> that do not support a mechanism for inhib
Hi,
+ return targetm.speculation_safe_load (mode, target, mem, lower, upper,
+ cmpptr, true);
So portable programming will use this builtin when available,
but for the majority of the targets the default will be wrong,
For instance why should a PDP port be t
On Wed, Jan 17, 2018 at 05:17:29PM +, Joseph Myers wrote:
> On Wed, 17 Jan 2018, Richard Earnshaw wrote:
>
> > + if (TREE_CODE (type) == ARRAY_TYPE)
> > +{
> > + /* Force array-to-pointer decay for c++. */
> > + gcc_assert (c_dialect_cxx ());
>
> What's the basis for the asser
On Wed, 17 Jan 2018, Richard Earnshaw wrote:
> + if (TREE_CODE (type) == ARRAY_TYPE)
> +{
> + /* Force array-to-pointer decay for c++. */
> + gcc_assert (c_dialect_cxx ());
What's the basis for the assertion? Why can't you have a pointer-to-array
passed in C?
--
Joseph S. Myer
This patch adds generic support for the new builtin
__builtin_speculation_safe_load. It provides the overloading of the
different access sizes and a default fall-back expansion for targets
that do not support a mechanism for inhibiting speculation.
* builtin-types.def (BT_FN_I1_CONST_VPT
