[LLVM Test Suite] Adds run script for simple HIP tests

[jplehr]

Enables running the LLVM Test Suite External HIP simple tests.

The tests are a handful of simple HIP applications. We run these tests also in the upstream buildbots.
Eventually, we want to make this be able to run all of the HIP tests.

[Kewen12]

lgtm!

It would be helpful if we could document the usage of this script.

[jplehr]

What sort of documentation would you like to see? A more general statement about what these run_* scripts are for or more in-depth explanation on each individual script?

I personally feel that the help text that this script produces is helpful enough, when you know what it is meant to achieve in general. But, of course, I cannot speak for others.

[Kewen12]

What sort of documentation would you like to see? A more general statement about what these run_* scripts are for or more in-depth explanation on each individual script?

I personally feel that the help text that this script produces is helpful enough, when you know what it is meant to achieve in general. But, of course, I cannot speak for others.

Just a general guidance about this script? like what it does or when people should run it, etc.

[mhalk]

LGTM. Only a few nits.

[mhalk]

nit: Would have expected this at the top, with the other defaults.
(If yes, I'd also adapt the help message to actually print that var.)

[mhalk]

nit: This is redundant. mkdir -p "${LLVMTS_EXTERNAL_DIR}/hip" is performed later and there's no check in-between.
Remove?

[mhalk]

Q: What symlink? I guess ${ROCM_LINK} -> ${ROCM_FOR_TESTS}
Maybe move directly above the symlink creation? There's no usage until that or success check anyways.

[mhalk]

nit: Would have expected this at the top, with the other defaults.
But on the other hand this behaves differently from : "${ROCM_VERSION_FILE:=6.0.0}"

[mhalk]

What sort of documentation would you like to see? A more general statement about what these run_* scripts are for or more in-depth explanation on each individual script?
I personally feel that the help text that this script produces is helpful enough, when you know what it is meant to achieve in general. But, of course, I cannot speak for others.

Just a general guidance about this script? like what it does or when people should run it, etc.

That makes sense to me, but we need to be careful how specific that information is.
The more specific, the faster it might degrade, i.e. become inapplicable.

Currently, I would not exactly know how to use this and e.g. consult: https://llvm.org/docs/TestSuiteGuide.html