On Wed, Dec 28, 2022 at 1:06 AM Roger Sayle wrote:
>
> This patch is a one line change, to call ix86_expand_clear instead of
> emit_move_insn with const0_rtx in ix86_split_ashl, allowing the backend
> to use an xor instruction to clear a register if appropriate.
>
> The effect is demonstrated with
This patch is a one line change, to call ix86_expand_clear instead of
emit_move_insn with const0_rtx in ix86_split_ashl, allowing the backend
to use an xor instruction to clear a register if appropriate.
The effect is demonstrated with the following function.
__int128 foo(__int128 x, unsigned long
