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Replace lli with %lli in RUN lines #38872

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llvmbot opened this issue Nov 1, 2018 · 4 comments
Open

Replace lli with %lli in RUN lines #38872

llvmbot opened this issue Nov 1, 2018 · 4 comments
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bugzilla Issues migrated from bugzilla test-suite

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@llvmbot
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llvmbot commented Nov 1, 2018

Bugzilla Link 39524
Version trunk
OS Linux
Attachments WIP patch for converting all tests to %lli
Reporter LLVM Bugzilla Contributor
CC @dwblaikie,@MatzeB,@rnk

Extended Description

lit.cfg.py defines substitutions for both lli and %lli, and this is
confusing, especially since there is no actual difference between these two
except that on Windows %lli includes an `-mtriple=' flag force-setting ELF
object format.

There is even a FIXME in `test/lit.cfg.py' about this very thing:

FIXME: Why do we have both lli and %lli that do slightly different

things?

It seems like the majority of tests could be converted to use one or the other.
If all tests can be converted to one substitution, the other one should be removed.
If there is a minority of tests that depend on the other substitution,
that substitution should be renamed to something special a la %llc_dwarf to
clearly indicate that it is a special case and not the default.

I included a patch that converts everything to %lli, but I don't know if it
really works because I don't have a Windows machine to test it on.
@MatzeB
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MatzeB commented Nov 1, 2018

FWIW: It seems that for most tools shipping with llvm (llc, opt, etc.) we just use the version with a '%' prefix. I think those are listed in the tools.extend list.

I recommend putting the patch up on phabricator and subscribing some people that are active on windows to the review.

@MatzeB
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MatzeB commented Nov 1, 2018

we just use the version with a '%' prefix.

That should have been: ... the version without a '%' prefix

@rnk
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rnk commented Nov 2, 2018

we just use the version with a '%' prefix.

That should have been: ... the version without a '%' prefix

+1

@llvmbot
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llvmbot commented Nov 3, 2018

we just use the version with a '%' prefix.

That should have been: ... the version without a '%' prefix

That's because there is no '%'-prefixed version of llc, opt, etc.

The majority of tests that run lli use %lli (~170 vs ~18), and I think it
should stay that way if an -mtriple flag is required because otherwise
(if the flag is attached to lli in lit.cfg.py) there will be no simple way
of setting a different triple for a test run since -mtriple can occur at most
once, and it may also seem just more confusing to people.

I recommend putting the patch up on phabricator and subscribing some people
that are active on windows to the review.

Thank you for advice, but I'm not sure. The WIP patch was just a simple
search-and-replace job because on my machine %lli and lli are the same.
Most of work is still to be done, and I can't contribute any of it. If the
thinking is that this little issue won't get enough attention from the right
people here, would you think posting on llvm-dev will help? If you still think
posting this patch on Phabricator is more appropriate I will do it.

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 10, 2021
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@rnk @MatzeB @llvmbot