[Bug c/59708] New: clang-compatible checked arithmetic builtins

[josh at joshtriplett dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59708

            Bug ID: 59708
           Summary: clang-compatible checked arithmetic builtins
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: josh at joshtriplett dot org

It would be nice to have a set of builtins for arithmetic operations that check
for overflow, ideally compatible with those available in clang; see
http://clang.llvm.org/docs/LanguageExtensions.html#checked-arithmetic-builtins
for details.

Such builtins could take advantage of native instructions that set overflow
flags, for instance.