[Bug target/78037] Incorrect code generated at optimization level -O2 for tzcnt and binary and

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78037

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|tree-optimization           |target

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Back to target because:

@defmac CLZ_DEFINED_VALUE_AT_ZERO (@var{mode}, @var{value})
@defmacx CTZ_DEFINED_VALUE_AT_ZERO (@var{mode}, @var{value})
A C expression that indicates whether the architecture defines a value
for @code{clz} or @code{ctz} with a zero operand.
...
Note that regardless of this macro the ``definedness'' of @code{clz}
and @code{ctz} at zero do @emph{not} extend to the builtin functions
visible to the user.  Thus one may be free to adjust the value at will
to match the target expansion of these operations without fear of
breaking the API@.