Regressions on trunk at revision 231198 vs revision 231181

[H.J. Lu x32]

New failures:
FAIL: gfortran.dg/goacc/reduction-2.f95   -O   scan-tree-dump-times gimple "target oacc_kernels map.tofrom:a .len: 4.." 1

New passes:
FAIL: gfortran.dg/goacc/coarray.f95   -O  (internal compiler error)
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/host_data-2.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/host_data-2.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/host_data-4.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/host_data-4.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test
FAIL: libgomp.oacc-c/../libgomp.oacc-c-c++-common/host_data-5.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/host_data-5.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 execution test