Regressions on master at commit r15-5333 vs commit r15-5330 on Linux/i686

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r15-5333 vs commit r15-5330 on Linux/i686
New failures:

New passes:
FAIL: gcc.dg/graphite/id-15.c (test for excess errors)
FAIL: gcc.dg/graphite/pr38413.c (test for excess errors)
FAIL: gcc.dg/graphite/pr38510.c (test for excess errors)
FAIL: gcc.target/i386/pr66891.c (test for excess errors)