Regressions on trunk at revision 168594 vs revision 168566

[H.J. Lu ia32]

New failures:
FAIL: g++.dg/torture/stackalign/unwind-0.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-0.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-1.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-1.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-2.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-3.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-3.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-4.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-4.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-5.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-5.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-6.C  -O2 -flto  (test for excess errors)
FAIL: g++.dg/torture/stackalign/unwind-6.C  -O2 -flto -flto-partition=none  (test for excess errors)
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto  line 12 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto  line 14 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto -flto-partition=none  line 12 arg1 == 1
FAIL: gcc.dg/guality/pr36728-1.c  -O2 -flto -flto-partition=none  line 14 arg1 == 1
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-3.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-apply-4.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test
FAIL: gcc.dg/torture/stackalign/builtin-return-1.c  -O2 -flto -flto-partition=none  execution test

New passes:
FAIL: ext/pb_ds/regression/hash_data_map_rand.cc execution test
FAIL: gcc.dg/guality/pr43077-1.c  -O2 -flto  line 42 varb == 2