Regressions on trunk at revision 193879 vs revision 193842

[H.J. Lu x32]

New failures:
FAIL: gcc.target/i386/pr55458.c  (test for errors, line 10)

New passes:
FAIL: gcc.dg/torture/pr51106-2.c  -O0  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O0  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O1  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O1  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O2  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O2  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -fomit-frame-pointer  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -fomit-frame-pointer  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -g  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -O3 -g  (test for excess errors)
FAIL: gcc.dg/torture/pr51106-2.c  -Os  (internal compiler error)
FAIL: gcc.dg/torture/pr51106-2.c  -Os  (test for excess errors)