Integrated: 8313262: C2: Sinking node may cause required cast to be dropped

[Roland Westrelin]

On Tue, 22 Aug 2023 07:29:13 GMT, Roland Westrelin <roland at openjdk.org> wrote:

> When a node is sunk out of a loop a cast node is created to pin the
> node out of the loop. When a chain of nodes is sunk, we don't want a
> cast node per node in the chain but rather one to pin the last of the
> chain. So the logic for sinking nodes looks for unneeded cast
> nodes. The test for what makes a cast unneeded is incorrect and causes
> a cast to not null to be wrongly removed.

This pull request has now been integrated.

Changeset: 1cee3b9f
Author:    Roland Westrelin <roland at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/1cee3b9fd9720e7938029a6992460b9053e65e57
Stats:     69 lines in 2 files changed: 68 ins; 0 del; 1 mod

8313262: C2:  Sinking node may cause required cast to be dropped

Reviewed-by: chagedorn, thartmann

-------------

PR: https://git.openjdk.org/jdk/pull/15380