[Bug target/65871] bzhi builtin/intrinsic wrongly assumes bzhi instruction doesn't set the ZF flag

[jamrial at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65871

--- Comment #7 from James Almer <jamrial at gmail dot com> ---
Thanks for the above fix.

I forgot to test BMI1's andn. That one should have an insn modeled this way as
well.

int foo (unsigned int x, unsigned int y)
{
    if (~x & y)
        return 1;
    return 0;
}


gcc -O2 -mbmi -c andn.c

0000000000000000 <foo>:
   0:   c4 e2 40 f2 fe          andn   %esi,%edi,%edi
   5:   31 c0                   xor    %eax,%eax
   7:   85 ff                   test   %edi,%edi
   9:   0f 95 c0                setne  %al
   c:   c3                      retq

http://www.felixcloutier.com/x86/ANDN.html