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

[ubizjak at gmail dot com]

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

--- Comment #17 from Uroš Bizjak <ubizjak at gmail dot com> ---
On alpha-linux-gnu, I got following g++ failures:

FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2 -flto
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-18.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-18.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-18.c   -O2 -flto
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-18.c   -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-6.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-6.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-6.c   -O2 -flto
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-6.c   -O2 -flto
-fuse-linker-plugin -fno-fat-lto-objects  execution test