Regressions on trunk at revision 148642 vs revision 148619

[H.J. Lu ia64]

New failures:
FAIL: gcc.dg/builtin-unreachable-3.c (internal compiler error)
FAIL: gcc.dg/builtin-unreachable-3.c (test for excess errors)
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "mult .&.u..1..lb: 1 sz: 1., &.x..1..lb: 1 sz: 1., 1, 1.;"
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "mult_array .&.abc..1..lb: 1 sz: 1., &.ab..1..lb: 1 sz: 1., 3, 2.;"
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "mult_val ..x., .x., 1, 1.;"
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "sub .&.u..1..lb: 1 sz: 1., 1.;"
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "sub_array .&.abc..1..lb: 1 sz: 1., 3.;"
FAIL: gfortran.dg/bind_c_usage_13.f03  -O  scan-tree-dump original "sub_val ..x., 1.;"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.0.sub3noiso .0, 0B, 0B, 0B, b, a, 0, 0, 1, 1\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.0.sub3noiso .1, z, y, x, 0B, 0B, 1, 1, 0, 0\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.1.sub4iso .0, 0B, 0B, 0B, b, a, 0, 0, 1, 1\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.1.sub4iso .1, z, y, x, 0B, 0B, 1, 1, 0, 0\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.2.sub5iso .0, 0B, 0B, 0B, b, a, 0, 0, 1, 1\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.2.sub5iso .1, z, y, x, 0B, 0B, 1, 1, 0, 0\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.3.sub6noiso .0, 0B, 0B, 0B, b, a, 0, 0, 1, 1\);"
FAIL: gfortran.dg/bind_c_usage_14.f03  -O  scan-tree-dump original "master.3.sub6noiso .1, z, y, x, 0B, 0B, 1, 1, 0, 0\);"
FAIL: gfortran.dg/c_f_pointer_tests_3.f90  -O  scan-tree-dump-times original "c_f" 1
FAIL: gfortran.dg/c_f_pointer_tests_3.f90  -O  scan-tree-dump-times original "c_f_pointer" 1
FAIL: gfortran.dg/c_f_pointer_tests_3.f90  -O  scan-tree-dump-times original "c_f_pointer_i4" 1
FAIL: gfortran.dg/missing_optional_dummy_4.f90  -O  scan-tree-dump original " tm_doit \(0B, 0\);"
FAIL: gfortran.dg/missing_optional_dummy_5.f90  -O  scan-tree-dump original " tm_doit \(&parm.(6|7), 0B, 0\);"

New passes:
FAIL: gcc.c-torture/compile/limits-fndefn.c  -O3 -g  (test for excess errors)
WARNING: program timed out.