Regressions on trunk at revision 266839 vs revision 266816

[H.J. Lu]

New failures:
FAIL: c-c++-common/asan/pr64820.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
FAIL: c-c++-common/asan/pr64820.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  output pattern test
FAIL: c-c++-common/asan/pr64820.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
FAIL: c-c++-common/asan/pr64820.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  output pattern test
FAIL: gcc.dg/Wstringop-truncation-5.c (test for excess errors)
FAIL: gcc.dg/Wstringop-truncation-5.c (test for excess errors)
FAIL: gcc.dg/Wstringop-truncation-5.c (test for excess errors)
FAIL: gcc.target/i386/pr85770.c (test for excess errors)

New passes: