[Bug c/102989] Implement C2x's n2763 (_BitInt)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102989

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #55572|0                           |1
        is obsolete|                            |

--- Comment #86 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 55592
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55592&action=edit
gcc14-bitint-wip.patch

small/medium _BitInt __builtin_{add,sub,mul}_overflow support (with testsuite
coverage) and large/huge _BitInt __builtin_mul_overflow support (just compile
tested on a simple testcase, more testing will need to wait until
__builtin_{add,sub}_overflow support is added for large/huge _BitInt.