[Bug rtl-optimization/117890] Wrong code with -fvect-cost-model=unlimited

[lin1.hu at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117890

--- Comment #1 from Hu Lin <lin1.hu at intel dot com> ---
Wrong behavior:
$ gcc    -m64 -o case  -O2 -march=x86-64-v3    case.c
-fvect-cost-model=unlimited
$ ./case
0

Correct behavior:
$ gcc    -m64 -o case  -O2 -march=x86-64-v3    case.c
$ ./case
4