Integrated: 8264063: Outer Safepoint poll load should not reference the head of inner strip mined loop.

[Vladimir Kozlov]

On Wed, 7 Apr 2021 02:29:20 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> When loop is "strip mined" polling address load ([parse1.cpp#L2280](https://github.com/openjdk/jdk/blob/master/src/hotspot/share/opto/parse1.cpp#L2280)) should be cloned together with safepoint node and pinned outside inner loop. Otherwise we have issues like [8263352](https://bugs.openjdk.java.net/browse/JDK-8263352)
> 
> I also remove leftover (unused needs_polling_address_input() method) from  [8220051](https://bugs.openjdk.java.net/browse/JDK-8220051) changes.
> 
> Tested hs-tier1-4

This pull request has now been integrated.

Changeset: 81d35e43
Author:    Vladimir Kozlov <kvn at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/81d35e43
Stats:     57 lines in 7 files changed: 10 ins; 46 del; 1 mod

8264063: Outer Safepoint poll load should not reference the head of inner strip mined loop.

Reviewed-by: roland, vlivanov

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PR: https://git.openjdk.java.net/jdk/pull/3365