Regressions on native/master at commit r17-542 vs commit r17-539 on Linux/x86_64

[Haochen Jiang via Gcc-regression]

Regressions on master at commit r17-542 vs commit r17-539 on Linux/x86_64
New failures:

New passes:
FAIL: gfortran.dg/coarray/image_index_3.f90 -fcoarray=lib -pthread  -O2  
-lcaf_shmem -lrt execution test