Inline across -ffast-math boundary

[Jan Hubicka]

> On 21/04/16 12:45, Jan Hubicka wrote:
> > this patch implements the long promised logic to inline across -ffast-math
> > boundary when eitehr caller or callee has no fp operations in it.  This is
> > needed to resolve code quality regression on Firefox with LTO where
> > -O3/-O2/-Ofast flags are combined and we fail to inline a lot of comdats
> > otherwise.
> 
> -Ofast turns allow-store-data-races param on.
> are such params handled by lto?

No, allow-store-data-races is ignored by LTO option handling and whatever is
used at final linktime wins.  THis is because it is --param parameter rather
than optimization option.

Given the nature of the option, I wonder why it was implemented as --param
thing?  It looks like typical optimization option to me and this way we lose
mechanizm to set it with function granuality like we can do other optimization
options.
Honza