Regressions on trunk at revision 191105 vs revision 191088

[H.J. Lu ia32 Core 2/i7]

New failures:
FAIL: gcc.dg/guality/pr43051-1.c  -Os  line 39 c == &a[0]
FAIL: gcc.dg/guality/pr54200.c  -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 20 z == 3

New passes:
FAIL: gfortran.dg/guality/pr41558.f90  -O0  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O1  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O2  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O3 -fomit-frame-pointer  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O3 -fomit-frame-pointer -funroll-all-loops -finline-functions  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O3 -fomit-frame-pointer -funroll-loops  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -O3 -g  line 7 s == 'foo'
FAIL: gfortran.dg/guality/pr41558.f90  -Os  line 7 s == 'foo'