[jdk18u] Integrated: 8284848: C2: Compiler blackhole arguments should be treated as globally escaping

[Aleksey Shipilev]

On Mon, 2 May 2022 11:11:14 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Unclean backport to improve Blackhole - EA interactions. The backport is not clean, because `IRNode` needs missing constants, and `set_escape_state` does not accept third argument (description) in 18u.
> 
> Additional testing:
>  - [x] `compiler/c2/irTests/blackhole` fail without the patch, pass with it
>  - [x] `compiler/blackhole` continue to pass

This pull request has now been integrated.

Changeset: 15776b5b
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.java.net/jdk18u/commit/15776b5b12f3d4ed0e933f9c9b2c10caca1150b1
Stats:     258 lines in 6 files changed: 258 ins; 0 del; 0 mod

8284848: C2: Compiler blackhole arguments should be treated as globally escaping

Reviewed-by: kvn
Backport-of: 5629c7555f9bb779c57f45dfb071abbb1d87bb7d

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PR: https://git.openjdk.java.net/jdk18u/pull/118