Regressions on trunk at revision 221149 vs revision 221134

[H.J. Lu ia32 -fpic]

New failures:
FAIL: gcc.target/i386/chkp-strchr.c (internal compiler error)
FAIL: gcc.target/i386/chkp-strchr.c (test for excess errors)
FAIL: gcc.target/i386/pr63995-2.c (internal compiler error)
FAIL: gcc.target/i386/pr63995-2.c (test for excess errors)

New passes: