RFR: 8253757: Add LLVM-based backend for hsdis [v2]

[Xin Liu]

On Wed, 30 Sep 2020 00:58:41 GMT, Ludovic Henry <luhenry at openjdk.org> wrote:

>> When bringing up Hotspot onto new platforms, it is not always possible to compile hsdis because gcc is not yet
>> available. For example, for Windows-AArch64 and macOS-AArch64.
>> For some such platforms, it is possible to use LLVM as an alternative backend as it also supports a disassembler
>> feature.
>
> Ludovic Henry has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Merge LLVM backend into hsdis and add Makefile support

src/utils/hsdis/hsdis.cpp line 79:

> 77:
> 78: #ifndef bool
> 79: #define bool int

if we switch to cpp, do you still this?

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PR: https://git.openjdk.java.net/jdk/pull/392