RFR: JDK-8300240: Replace NULL with nullptr in share/ci/

[Vladimir Kozlov]

On Tue, 17 Jan 2023 11:07:10 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

> Do the conversion in the share/ci/ sub-directory and all of its files.

src/hotspot/share/ci/ciMethodData.hpp line 523:

> 521:   // Get the data at an arbitrary bci, or null if there is none. If m
> 522:   // is not nullptr look for a SpeculativeTrapData if any first.
> 523:   ciProfileData* bci_to_data(int bci, ciMethod* m = nullptr);

Again mixture of `null` and `nullptr` in comment. Even so the comment for `ciMethodData::bci_to_data()` in .cpp file says `nullptr`

src/hotspot/share/ci/ciNullObject.hpp line 2:

> 1: /*
> 2:  * Copyright (c) 1999, 2023, Oracle and/or its affiliates. All rights reserved.

No change in file

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PR: https://git.openjdk.org/jdk/pull/12029