Regressions on trunk at revision 273445 vs revision 272958

[H.J. Lu (ia32 -fpic)]

New failures:

New passes:
FAIL: gcc.dg/torture/pr53663-2.c   -O2  execution test
FAIL: gcc.dg/torture/pr53663-2.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/pr53663-2.c   -O3 -g  execution test
FAIL: gcc.dg/torture/pr53663-2.c   -Os  execution test