Regressions on master at commit r16-4285 vs commit r16-4281 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r16-4285 vs commit r16-4281 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.dg/pr121987.c (test for excess errors)