basic asm and memory clobbers

[Sandra Loosemore]

On 11/19/2015 06:23 PM, David Wohlferd wrote:

>> About the only immediate task would be to ensure that the
>> documentation for traditional asms clearly documents the desired
>> semantics and somehow note that there are known bugs in the
>> implementation (ie 24414, handling of flags registers, and probably
>> other oddities)
>
> Given that gcc is at phase 3, I'm guessing this work won't be in v6?  Or
> would this be considered "general bugfixing?"
>
> The reason I ask is I want to clearly document what the current behavior
> is as well as informing them about what's coming.  If this isn't
> changing until v7, the text can be updated then to reflect the new
> behavior.

Documentation fixes are accepted all the way through Stage 4, since 
there's less risk of introducing regressions in user programs from 
accidental documentation mistakes than code errors.

OTOH, I'd discourage adding anything to the docs about anticipated 
changes in future releases, except possibly to note that certain 
features or behavior are deprecated and may be removed in future 
releases (with a suggestion about what you should do instead).  We've 
already got too many "maybe someday this will be fixed" notes in the 
manual that are not terribly useful to users.

-Sandra