[LLVMdev] make check issue with llvm-cov

[Reed Kotler]

Even test.c does not exist.

Only test.cpp.

How can it pass?

I can try the patch over the weekend. I have to leave soon for today.

On 02/21/2014 02:46 PM, Bob Wilson wrote:
> If you can help get it working on big-endian systems, we should be able to remove the XFAIL. That seems like the cleanest way out of this. Yuchen sent a patch to llvm-commits on 12/19/13. (I can resend it to you if you don’t have that.) Can you try that out on a BE mips system?
>
> On Feb 21, 2014, at 7:11 AM, Reed Kotler <Reed.Kotler at imgtec.com> wrote:
>
>> On 02/21/2014 02:58 AM, Daniel Sanders wrote:
>>>>> And in the test file there is a line:
>>>>> XFAIL: powerpc64, s390x, mips, sparc
>>>> This is a crude attempt at "XFAIL: big-endian". The mips entry here is just
>>>> wrong if the system is little-endian - the test passes on little-endian machines
>>>> and fails on big-endian. This is obviously a problem.
>>> 'XFAIL: mips' counts as an XFAIL for all mips targets because lit is checking for substrings (using the 'in' operator) of the target triple and 'mips' is a substring of 'mipsel-...'. I haven't tested this but I think that we need 'XFAIL: mips-, mips64-' to distinguish little/big-endian correctly for MIPS.
>>> The relevant code is the isExpectedToFail() function in utils/lit/lit/Test.py.
>> In this case what seems to be happening is the llvm-cov is NOT failing and it should.
>> That causes an unexpected pass which is what is making "make check" fail.
>>
>>>> -----Original Message-----
>>>> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
>>>> On Behalf Of Justin Bogner
>>>> Sent: 21 February 2014 08:21
>>>> To: Reed Kotler
>>>> Cc: LLVMdev at cs.uiuc.edu
>>>> Subject: Re: [LLVMdev] make check issue with llvm-cov
>>>>
>>>> reed kotler <rkotler at mips.com> writes:
>>>>> On a native mips linux machine, we are failing a make check test which
>>>>> seems like it is supposed to already xfail.
>>>> I think you're mistaken. The test below looks like it's passing.
>>>>
>>>>> For one, the file test.c does not even exist (it is called test.cpp)
>>>> This should probably be test.o, rather than test.c or test.cpp, but the
>>>> interface to llvm-cov is compatible with gcov, which completely ignores the
>>>> file given as an argument other than to base the .gcno and .gcno file names
>>>> on it.
>>>>
>>>>> And in the test file there is a line:
>>>>> XFAIL: powerpc64, s390x, mips, sparc
>>>> This is a crude attempt at "XFAIL: big-endian". The mips entry here is just
>>>> wrong if the system is little-endian - the test passes on little-endian machines
>>>> and fails on big-endian. This is obviously a problem.
>>>>
>>>>> The script in make check thinks that it passed but clearly it does not.
>>>>> llvm-cov is returning 0 in this case.
>>>> I'm not sure which case you're referring to. This test file really has too many
>>>> tests in it, which makes it confusing to debug failures.
>>>> Someone (me?) should probably split this into several tests that invoke llvm-
>>>> cov once each. The use of diff should be replaced with FileCheck as well, so
>>>> that error messages are clearer.
>>>>
>>>> In any case, all of the llvm-cov calls except the read/checksum fail invocations
>>>> should (and do) return zero on little-endian. I think the only problem here is
>>>> that the XFAIL line is wrong.
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>>
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