https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91540
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On the trunk we get:
_5 = cond1_2(D) & cond2_3(D);
_6 = (int) _5;
_7 = 43 - _6;
If we replace the minus with xor, we would get what clang gives.
I think we do this with or though.
I looked into a slightly different case:
int Test(bool cond1, bool cond2)
{
if (cond1)
{
if (cond2)
{
return 43;
}
}
return 42;
}
int Test1(bool cond1, bool cond2)
{
int t = 0;
if (cond1)
{
if (cond2)
{
t = 1;
}
}
return 42 + t;
}
int Test0(bool cond1, bool cond2)
{
int t = 0;
if (cond1)
{
if (cond2)
{
t = 1;
}
}
return 42 + t;
}
int Test2(bool cond1, bool cond2)
{
int t = cond1 & cond2;
return 42 + t;
}
int Test3(bool cond1, bool cond2)
{
int t = (cond1 & cond2);
return 42 | t;
}
---- CUT ----
GCC produces the decent code for all of the Tests here while clang produces
produces decent for Test2 and Test3.
