Regressions on trunk at revision 261779 vs revision 261728

[H.J. Lu]

New failures:
FAIL: gcc.dg/guality/pr48437.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  line 14 i == 0
FAIL: gcc.dg/guality/pr48437.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  line 14 i == 0
FAIL: gcc.dg/guality/pr48437.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 14 i == 0
FAIL: gcc.dg/guality/pr48437.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  line 14 i == 0

New passes:
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++11 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++11 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++11  (test for warnings, line 63)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++11  (test for warnings, line 63)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++14 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++14 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++14  (test for warnings, line 63)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++14  (test for warnings, line 63)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++98 (test for excess errors)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++98  (test for warnings, line 63)
FAIL: c-c++-common/attr-nonstring-8.c  -std=gnu++98  (test for warnings, line 63)