[PATCH] Add ALL to FileCheck

[Stephen Lin]

> I already did the multiple prefix stuff, it's in the current patch. My only
> question is how it interacts with CHECK-DAG

Oh, I didn't see the update.

My feeling is that the functionality should work identically as if all
the check lines that matched any of the prefix were given a single
prefix; basically just like you did a sed replacement of either given
prefix to CHECK, removed all other prefixes, and ran FileCheck with
its default settings.

Stephen