Regressions on trunk at revision 230589 vs revision 230541

[H.J. Lu x32]

New failures:

New passes:
FAIL: gcc.dg/tree-ssa/split-path-1.c execution test
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/loop-auto-1.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 (internal compiler error)
FAIL: libgomp.oacc-c++/../libgomp.oacc-c-c++-common/loop-auto-1.c -DACC_DEVICE_TYPE_host=1 -DACC_MEM_SHARED=1 (test for excess errors)