RFR: 8260191: Do not include access.hpp in oop.hpp

[Kim Barrett]

On Wed, 20 Jan 2021 22:30:44 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Please review this trivial change.
> 
> oop.h is included by 860 out of 1000 HotSpot .o files. It includes access.h for this member function declaration only:
> 
> template <DecoratorSet decorator> oop obj_field_access(int offset) const;
> 
> Instead of access.h, oop.h should include accessDecorators.hpp. This avoids including lots of header files from the Access API.
> 
> HotSpot build time is reduced by about 0.5% for this single-line change.
> 
> Tested with mach5: tier1, builds-tier2, builds-tier3, builds-tier4 and builds-tier5. Also locally: aarch64, arm, ppc64, s390, x86, and zero.

Forgot to say earlier, I agree this is trivial.

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Marked as reviewed by kbarrett (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2172