Regressions on native/master at commit r16-2600 vs commit r16-2593 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r16-2600 vs commit r16-2593 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.dg/tree-ssa/cswtch-6.c scan-assembler .rodata.cst16