On 6 December 2013 16:59, Richard Henderson <rth@xxxxxxxxxxx> wrote:
> Sorry for missing this in the first round: For the silly corner case of Rd ==
> XZR, tcg_rd is dead after the branch.
>
> We could either move the tcg_rd assignment down into each basic block with the
> assignment to tcg_src, or simply add
>
> if (rd == 31) {
> /* silly no-op write; until we use movcond we must special-case
> this to avoid a dead temporary across basic blocks. */
> return;
> }
>
> Either solution is ok by me.
That specialcase looks simplest to me.
thanks
-- PMM
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