[PATCH] rs6000: -flto forgets 'no-vsx' function attributes (PR target/70010)

[Peter Bergner]

On 10/15/19 10:44 AM, Richard Biener wrote:
> On October 15, 2019 5:09:52 PM GMT+02:00, Peter Bergner <bergner@linux.ibm.com> wrote:
>> If the user explicitly said not to compile a function with a particular
>> option, how can we justify ignoring that request just because we're
>> inlining it?  We don't do that for the out of line version of that
>> callee function.
>
> I wonder how you can tell apart explicit vs. Implicit in the LTO context
> where the option is represented as target attribute on the function.

Ah, so all of the options used to compile the callee in an LTO context,
whether they were implicit or explicit will look explicit?  I agree, that
would be a problem!

Jiufu, can you see if there is a way to determine whether a callee
option in the LTO context really was an explicit option versus an
implicit/default option?  ...or does your follow on patch to my
patch do that?

Peter