Regressions on trunk at revision 190908 vs revision 190524

[Kirill Yukhin [ia32 Core i7 AVX]]

New failures:
FAIL: gfortran.dg/coarray_poly_3.f90  -O   (test for errors, line 12)
FAIL: gfortran.dg/coarray_poly_3.f90  -O   (test for errors, line 6)
FAIL: gfortran.dg/coarray_poly_3.f90  -O  (test for excess errors)

New passes:
FAIL: gcc.dg/guality/pr43051-1.c  -Os  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr54200.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 20 z == 3