Regressions on master at commit r16-5581 vs commit r16-5574 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r16-5581 vs commit r16-5574 on Linux/x86_64
New failures:

New passes:
FAIL: gcc.dg/vla-1.c scan-tree-dump-times optimized " s=> i" 2
FAIL: gcc.dg/vla-1.c scan-tree-dump-times optimized " s=> i" 2