Regressions on native/master at commit r16-517 vs commit r16-515 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r16-517 vs commit r16-515 on Linux/x86_64
New failures:
FAIL: gcc.target/i386/avx512vl-stv-rotatedi-1.c scan-assembler-times vpro[lr]q 
29
FAIL: gcc.target/i386/pr78794.c scan-assembler pandn

New passes:
FAIL: gcc.dg/tree-ssa/pr64910-2.c scan-assembler-times and|test 20