Integrated: JDK-8301074: Replace NULL with nullptr in share/opto/

[Johan Sjölen]

On Wed, 25 Jan 2023 11:46:36 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Hi, this PR changes all occurrences of NULL to nullptr for the subdirectory share/opto/. Unfortunately the script that does the change isn't perfect, and so we
> need to comb through these manually to make sure nothing has gone wrong. I also review these changes but things slip past my eyes sometimes.
> 
> Here are some typical things to look out for:
> 
>     No changes but copyright header changed (probably because I reverted some changes but forgot the copyright).
>     Macros having their NULL changed to nullptr, these are added to the script when I find them. They should be NULL.
>     nullptr in comments and logs. We try to use lower case "null" in these cases as it reads better. An exception is made when code expressions are in a comment.
> 
> An example of this:
> 
> 
> // This function returns null
> void* ret_null();
> // This function returns true if *x == nullptr
> bool is_nullptr(void** x);
> 
> 
> Note how nullptr participates in a code expression here, we really are talking about the specific value nullptr.
> 
> Thanks!

This pull request has now been integrated.

Changeset: 5726d31e
Author:    Johan Sjölen <jsjolen at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/5726d31e56530bbe7dee61ae04b126e20cb3611d
Stats:     5594 lines in 111 files changed: 1 ins; 0 del; 5593 mod

8301074: Replace NULL with nullptr in share/opto/

Reviewed-by: kvn, jwilhelm

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PR: https://git.openjdk.org/jdk/pull/12187