Many float/double errors in math/ testsuite with gcc master branch

[Andrew Pinski]

On Mon, Nov 28, 2022 at 5:26 PM Romain GEISSLER via Libc-alpha
<libc-alpha@sourceware.org> wrote:
>
> Hi,
>
> Trying to build currently a toolchain using glibc (current master branch) + gcc (current master branch) + binutils (release branch 2.39) on Linux x86_64 yields for me 53 test failure in the math/ folder. You can find the list of these tests at the end of this mail. Trying to downgrade to the latest commit of the current release branch of gcc 12 (so gcc 12.2.1) make all my glibc test failure disappear. Checking randomly couple of the .out files of the failing tests, it seems these test don’t work at all with gcc 13, there are many errors, and it doesn’t seem it’s due to a small change of precision. Am I the only one to experiences these test failure ? In case you don’t have such errors in the same conditions, how shall I report these errors for investigation ? Just the .out file would be enough ? I don’t know anything about these math/ tests, it’s the first time I see them failing like this.

This might be GCC bug 107879 (https://gcc.gnu.org/PR107879 ) or GCC
bug 107608 (https://gcc.gnu.org/PR107608 ) . I am suspecting the first
one. Jakub has a fix which he is I suspect will be submitting tomorrow
too.

Thanks,
Andrew Pinski

>
> Cheers,
> Romain
>
> FAIL: math/test-double-cosh
> FAIL: math/test-double-exp10
> FAIL: math/test-double-expm1
> FAIL: math/test-double-iseqsig
> FAIL: math/test-double-lgamma
> FAIL: math/test-double-log1p
> FAIL: math/test-double-tgamma
> FAIL: math/test-float-cosh
> FAIL: math/test-float-expm1
> FAIL: math/test-float-iseqsig
> FAIL: math/test-float-lgamma
> FAIL: math/test-float-log1p
> FAIL: math/test-float-tgamma
> FAIL: math/test-float128-catan
> FAIL: math/test-float128-catanh
> FAIL: math/test-float128-cosh
> FAIL: math/test-float128-exp10
> FAIL: math/test-float128-iseqsig
> FAIL: math/test-float128-lgamma
> FAIL: math/test-float128-log
> FAIL: math/test-float128-log1p
> FAIL: math/test-float128-pow
> FAIL: math/test-float128-tgamma
> FAIL: math/test-float128-y0
> FAIL: math/test-float128-y1
> FAIL: math/test-float32-cosh
> FAIL: math/test-float32-expm1
> FAIL: math/test-float32-iseqsig
> FAIL: math/test-float32-lgamma
> FAIL: math/test-float32-log1p
> FAIL: math/test-float32-tgamma
> FAIL: math/test-float32x-cosh
> FAIL: math/test-float32x-exp10
> FAIL: math/test-float32x-expm1
> FAIL: math/test-float32x-iseqsig
> FAIL: math/test-float32x-lgamma
> FAIL: math/test-float32x-log1p
> FAIL: math/test-float32x-tgamma
> FAIL: math/test-float64-cosh
> FAIL: math/test-float64-exp10
> FAIL: math/test-float64-expm1
> FAIL: math/test-float64-iseqsig
> FAIL: math/test-float64-lgamma
> FAIL: math/test-float64-log1p
> FAIL: math/test-float64-tgamma
> FAIL: math/test-float64x-cosh
> FAIL: math/test-float64x-iseqsig
> FAIL: math/test-float64x-lgamma
> FAIL: math/test-float64x-tgamma
> FAIL: math/test-ldouble-cosh
> FAIL: math/test-ldouble-iseqsig
> FAIL: math/test-ldouble-lgamma
> FAIL: math/test-ldouble-tgamma