[Bug libstdc++/66262] [REGRESSION] testsuite failure with libstdc++ (gcc-5) and g++-4.9 together

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66262

--- Comment #17 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Xi Ruoyao <xry...@gcc.gnu.org>:

https://gcc.gnu.org/g:ee4a6343225b6e44b3d2b2c90c355c21f7ec6855

commit r15-2931-gee4a6343225b6e44b3d2b2c90c355c21f7ec6855
Author: Xi Ruoyao <xry...@xry111.site>
Date:   Thu Jul 4 02:49:28 2024 +0800

    LoongArch: Implement scalar isinf, isnormal, and isfinite via fclass

    Doing so can avoid loading FP constants from the memory.  It also
    partially fixes PR 66262 as fclass does not signal on sNaN.

    gcc/ChangeLog:

            * config/loongarch/loongarch.md (extendsidi2): Add ("=r", "f")
            alternative and use movfr2gr.s for it.  The spec clearly states
            movfr2gr.s sign extends the value to GRLEN.
            (fclass_<fmt>): Make the result SImode instead of a floating
            mode.  The fclass results are really not FP values.
            (FCLASS_MASK): New define_int_iterator.
            (fclass_optab): New define_int_attr.
            (<FCLASS_MASK:fclass_optab><ANYF:mode>): New define_expand
            template.

    gcc/testsuite/ChangeLog:

            * gcc.target/loongarch/fclass-compile.c: New test.
            * gcc.target/loongarch/fclass-run.c: New test.