Regressions on master at commit r16-4418 vs commit r16-4416 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r16-4418 vs commit r16-4416 on Linux/x86_64
New failures:

New passes:
FAIL: 29_atomics/atomic_ref/float.cc  -std=gnu++20 execution test
FAIL: 29_atomics/atomic_ref/float.cc  -std=gnu++26 execution test