Regressions on trunk at revision 263604 vs revision 263587

[H.J. Lu (Intel64 Core i7)]

New failures:
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O0  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.target/i386/20040112-1.c scan-assembler testb

New passes:
FAIL: gcc.target/i386/avx2-cvt-2.c scan-assembler vcvtps2pd[^\n\r]*(%xmm[^\n\r]*%ymm|ymm[^\n\r]*xmm)
FAIL: gcc.target/i386/avx-cvt-2.c scan-assembler vcvtps2pd[^\n\r]*(%xmm[^\n\r]*%ymm|ymm[^\n\r]*xmm)