[jdk11u-dev] RFR: 8254072: AArch64: Get rid of --disable-warnings-as-errors on Windows+ARM64 build [v3]

[Reka Kovacs]

> Despite its title, this patch only touches common code that's present before adding Windows/AArch64 support. Not a clean backport. Differences to the original commit:
> 
> - This is the first time we disable an MSVC warning for hotspot in 11, so in  `make/hotspot/lib/CompileJvm.gmk` this introduces a new `DISABLED_WARNINGS_microsoft` line.
> - We disable the same warning in  `make/hotspot/lib/CompileGtest.gmk`.
> - A tiny useless switch is removed from `src/hotspot/cpu/aarch64/aarch64.ad` that's no longer present on tip (probably not worth a separate PR).
> - <s>Changes to `src/hotspot/cpu/aarch64/frame_aarch64.cpp` don't yet include the changes from #215.</s>
> - The assert on line 1477 in `src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp` needed some adjustment to compile. (I'm not sure how it compiles on tip, as I don't see `-Wsign-compare` turned off there either, but the types seem to be the same.)
> 
> This is part of the Windows/AArch64 port.

Reka Kovacs has updated the pull request incrementally with three additional commits since the last revision:

 - Use size_t in generate_disjoint_copy
 - Explain disabled MSVC warning C4146 in comment
 - Fix MSVC warning C4334: result of 32-bit shift implicitly converted to 64 bits

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

Changes:
  - all: https://git.openjdk.java.net/jdk11u-dev/pull/280/files
  - new: https://git.openjdk.java.net/jdk11u-dev/pull/280/files/d7975df8..09587d5e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=280&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=280&range=01-02

  Stats: 10 lines in 4 files changed: 5 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/280.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/280/head:pull/280

PR: https://git.openjdk.java.net/jdk11u-dev/pull/280