[PATCH] D30725: [FileCheck] Added [[@CLEAR:regex]] as a way to clear variables.

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In https://reviews.llvm.org/D30725#695129, @tra wrote:

> @arsenm
>
> I think check-label and regex variables are orthogonal. CHECK-LABEL does separate chunks of input for matching and error reporting purposes, but regex variables are more akin to a preprocessor -- we use variable value to construct regex to match against the input. I don't think CHECK-LABEL is a good fit for hard boundary on variable lifetime.
>
> Here's one (reasonable, I believe) use case for across-the-CHECK-LABEL vars:
>
>   ; CHECK-LABEL: generated_function_foo
>   ; CHECK: store something [[SHARED_OBJECT:generated_object_name_x[0-9]+]]
>   ...
>   ; CHECK-LABEL: generated_function_bar
>   ; CHECK: x = load [[SHARED_OBJECT]]


If not CHECK-LABEL, then I think a CLEAR-ALL-VARIABLES would be more helpful/less burdensome than clearing individual vars (or maybe a CHECK-REGION combination of LABEL and clearing)


https://reviews.llvm.org/D30725