Regressions on master at commit r17-1504 vs commit r17-1459 on Linux/x86_64

[Haochen Jiang]

Regressions on master at commit r17-1504 vs commit r17-1459 on Linux/x86_64
New failures:
FAIL: g++.dg/vect/slp-pr98855.cc  -std=c++26  scan-tree-dump-not slp1 "vectorizing stmts using SLP"
FAIL: g++.dg/vect/slp-pr98855.cc  -std=c++26  scan-tree-dump-not slp1 "vectorizing stmts using SLP"
FAIL: g++.dg/vect/slp-pr98855.cc  -std=c++26  scan-tree-dump slp1 "not vectorized: vectorization is not profitable"
FAIL: g++.dg/vect/slp-pr98855.cc  -std=c++26  scan-tree-dump slp1 "not vectorized: vectorization is not profitable"

New passes: