[Bug target/100152] [10/11/12 Regression] used caller-saved register not preserved across a call.

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100152

--- Comment #52 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to lucier from comment #51)

> /Users/lucier/programs/gcc/gcc-mainline/libstdc++-v3/testsuite/29_atomics/
> atomic_integral/wait_notify.cc -std=gnu++2a -pthread
> -fdiagnostics-plain-output ./libtestc++.a -liconv
> -L/Users/lucier/programs/gcc/objdirs/gcc-test/x86_64-apple-darwin19.6.0/
> libstdc++-v3/src/filesystem/.libs -lm -o ./wait_notify.exe^M
> PASS: 29_atomics/atomic_integral/wait_notify.cc (test for excess errors)
> Setting LD_LIBRARY_PATH to

I do see this test timeout (randomly) on un-patched Darwin19 (at least on
corei7), however I will re-try and compare binaries with / without the 100152
proposed patch.