Regressions on trunk at revision 187647 vs revision 187626

[H.J. Lu x32]

New failures:
FAIL: g++.dg/torture/pr46154.C  -O1  (internal compiler error)
FAIL: g++.dg/torture/pr46154.C  -O1  (test for excess errors)

New passes:
FAIL: g++.old-deja/g++.abi/cxa_vec.C -std=gnu++11 execution test
FAIL: g++.old-deja/g++.abi/cxa_vec.C -std=gnu++98 execution test
FAIL: gcc.dg/torture/pr48542.c  -O0  execution test
FAIL: gcc.misc-tests/gcov-7.c execution test
FAIL: gcc.misc-tests/gcov-7.c gcov failed: gcov-7.c.gcov does not exist