Regressions on trunk at revision 255470 vs revision 255464

[H.J. Lu x32]

New failures:
FAIL: gfortran.dg/maxval_char_1.f90   -O3 -fomit-frame-pointer -funroll-loops -fpeel-loops -ftracer -finline-functions  execution test

New passes:
FAIL: gcc.dg/builtin-stringop-chk-9.c  (test for warnings, line 125)
FAIL: gcc.dg/builtin-stringop-chk-9.c  (test for warnings, line 133)
FAIL: gcc.dg/builtin-stringop-chk-9.c  (test for warnings, line 141)
FAIL: gcc.dg/builtin-stringop-chk-9.c  (test for warnings, line 149)