RFR: 8261672: Reduce inclusion of classLoaderData.hpp

[Coleen Phillimore]

On Fri, 12 Feb 2021 19:41:54 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> classLoaderData.hpp is included by about 700 out of 1000 .o files in HotSpot. Most of these are transitively included through klass.hpp, typeArrayKlass.hpp and instanceKlass.hpp.
> 
> These headers can be refactored by moving inline functions that depend on ClassLoaderData to xxx.inline.hpp. This reduces the .o files that include classLoaderData.hpp to about 260.
> 
> (I also removed a bunch of unnecessary inclusion of classLoader.hpp from a few C files).
>  
> Tested with mach5: tier1, builds-tier2, builds-tier3, builds-tier4 and builds-tier5. Also locally: aarch64, arm, ppc64, s390, x86, and zero.

Looks good.  I think adding compiledICHolder.inline.hpp is worth doing because performance matters to its caller in compiledMethod.cpp.

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Marked as reviewed by coleenp (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2555