Integrated: 8292640: C2: Remove unused scratch register usages on x86

Tue Aug 23 20:28:55 UTC 2022

On Thu, 18 Aug 2022 22:13:07 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

> (PR is dependent on #9932.)
> 
> Remove redundant scratch register usages in C2 generated code on x86. 
> 
> Stubs put constants in code cache, so they are RIP-relative addressable from generated code. It allows to save on scratch registers when accessing constants.  
> 
> Testing: hs-tier1 - hs-tier4

This pull request has now been integrated.

Changeset: 926380d3
Author:    Vladimir Ivanov <vlivanov at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/926380d3b748fd591f45abc99c497abc62c52565
Stats:     406 lines in 5 files changed: 22 ins; 28 del; 356 mod

8292640: C2: Remove unused scratch register usages on x86

Reviewed-by: kvn

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PR: https://git.openjdk.org/jdk/pull/9933