Hi, This is a repost of the patch at https://gcc.gnu.org/pipermail/gcc-patches/2022-September/600887.html which never really got green light, but I stopped pushing because stage 1 was closing and I was out of time.
It depends on a middle-end patch adding a type-generic __builtin_iseqsig(), which I posted for review at: https://gcc.gnu.org/pipermail/gcc-patches/2023-June/620801.html Bootstrapped and regtested on x86_64-pc-linux-gnu, OK to commit (once the middle-end patch is accepted)? FX
0002-Fortran-add-IEEE_QUIET_-and-IEEE_SIGNALING_-comparis.patch
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