Regressions on native/releases/gcc-15 at commit r15-10458 vs commit r15-10453 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on releases/gcc-15 at commit r15-10458 vs commit r15-10453 on 
Linux/x86_64
New failures:

New passes:
FAIL: gcc.target/i386/builtin-copysign-8b.c check-function-bodies foo