Regressions on trunk at revision 238117 vs revision 238076

[Intel Automatic Testing System [Intel64 Core AVXi]]

New failures:
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2  execution test
FAIL: gfortran.dg/ldist-1.f90   -O   scan-tree-dump ldist "distributed: split to"
FAIL: gfortran.dg/ldist-1.f90   -O   scan-tree-dump ldist "distributed: split to"
FAIL: gfortran.dg/pr42108.f90   -O   scan-tree-dump pre "in all uses of countm1[^\n]* / "
FAIL: gfortran.dg/vect/pr62283.f   -O   scan-tree-dump-times vect "vectorized 1 loops" 2

New passes:
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/atomic/c11-atomic-exec-5.c   -Os  execution test
WARNING: program timed out.