On 17 January 2024 14:20:49 CET, Jan Hubicka wrote:
>--- a/gcc/predict.def
>+++ b/gcc/predict.def
>@@ -94,6 +94,16 @@ DEF_PREDICTOR (PRED_LOOP_ITERATIONS_GUESSED, "guessed loop
>iterations",
> DEF_PREDICTOR (PRED_LOOP_ITERATIONS_MAX, "guessed loop iterations",
> PROB_UNINITIALIZED,
>
> Please fill in what has changed, both for predict-18.c and predict.{cc,def}
> changes.
Sorry, I re-generated the patch after fixing some typos and forgot to
copy over the changelog.
>
> > @@ -2613,24 +2658,40 @@ expr_expected_value_1 (tree type, tree op0, enum
> > tree_code code,
> >
On Wed, Jan 17, 2024 at 01:45:18PM +0100, Jan Hubicka wrote:
> Hi,
> expr_expected_value is doing some guesswork when it is merging two or more
> independent value predictions either in PHI node or in binary operation.
> Since we do not know how the predictions interact with each other, we can
> no
