[Bug tree-optimization/96938] Failure to optimize bit-setting pattern when not using temporary

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96938

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
void
foo (char *x, int y)
{
  *x &= ~(1 << y);
}

void
bar (char *x, int y)
{
  int t = *x & ~(1 << y);
  *x = t;
}
With type narrowing which only happens in the FEs right now, we are then unable
to match bt* instruction.