Integrated: 8253757: Add LLVM-based backend for hsdis

[Magnus Ihse Bursie]

On Fri, 18 Feb 2022 11:44:04 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Third time's a charm! After the two previous closed PRs for this issue, I think this functionality is finally ready to enter mainline. :)
> 
> This code is at it's core the same as the previous PR. The main C++ hsdis implementation is still the one @luhenry wrote, with some changes. As in the previous PR, I extracted the LLVM-specific part into a separate file. In addition to the last PR, I have also fixed a warning, and added a patch inspired by @nick-arm for getting past instructions unknown to LLVM.
> 
> Thanks to the prototype written by @JornVernee (and his graciously providing me with a working version of LLVM build for Windows), this PR now has full support for LLVM on Windows (as well as Linux and macOS).
> 
> Finally, I have cleaned up the integration in autoconf and Hsdis.gmk, and written a thorough guide in the README on how to build witth LLVM, on Windows and on saner platforms. :)
> 
> I'm pretty sure this means that all comments and criticism in the previous PR has been addressed.
> 
> Huge thanks to everyone who has helped me with getting this PR in place. I have a hard time remember a feature that has been so tricky to get in place, for something to seemingly simple...

This pull request has now been integrated.

Changeset: d7a706a5
Author:    Magnus Ihse Bursie <ihse at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/d7a706a54076109b1a600a4d963df54b6d3f86de
Stats:     495 lines in 4 files changed: 490 ins; 0 del; 5 mod

8253757: Add LLVM-based backend for hsdis

Co-authored-by: Magnus Ihse Bursie <ihse at openjdk.org>
Co-authored-by: Ludovic Henry <luhenry at openjdk.org>
Co-authored-by: Jorn Vernee <jvernee at openjdk.org>
Co-authored-by: Nick Gasson <ngasson at openjdk.org>
Reviewed-by: erikj, luhenry

-------------

PR: https://git.openjdk.java.net/jdk/pull/7531