* Avoid transformation from multiplication to left shift in case of 64 bit value

* Fixed System.Collections.Concurrent.Tests timeout issue

* [ppc64le] Fixed test case failures

* [ppc64le] Incorporated code review comments

Co-authored-by: Sapana Khemkar <sapana.khemkar@ibm.com>
Co-authored-by: Sapana-Khemkar <94051076+Sapana-Khemkar@users.noreply.github.com>

Co-authored-by: Anton Lapounov <antonl@microsoft.com>

Co-authored-by: Larry Ewing <lewing@microsoft.com>

…ix field layout behavior (dotnet#74279)

* First stab at support for proper 128bit integer layout and abi

* Add ABI tests for Int128 covering interesting scenarios

* Fix bugs so that at least Windows Arm64 works

* Add more types to the ABI tester, so that we cover the Int128 scenarios

* Revert changes which attempted to enable by value passing for Int128

* Make Int128 have layout match the expected unmanaged field layout - On Unix platforms (64 bit) use 16 byte alignment - On Arm32 use 8 byte alignment matching the 128 byte vector type - On other Windows platforms the 128 bit integer type isn't defined by the C compiler, but match the behavior of other 128 bit types (16 byte alignment)

Add tests to call down to native that should pass with these rules

- Disable use of Int128 as p/invoke parameter passed by value

* Mark Int128 types as not having a stable abi - This disables use of these types for parameter passing in R2R images

* Address all known issues

* Try to fix PR job

* Should fix the test issues

* Apply suggestions from code review

Co-authored-by: Jeremy Koritzinsky <jkoritzinsky@gmail.com>

Co-authored-by: David Wrighton <davidwr@microsoft.com>
Co-authored-by: Jeremy Koritzinsky <jkoritzinsky@gmail.com>

Lets us make dotnet#72645 a non-blocking-release issue.

We also set NativeAotSupported to false for Mac on the line above. Crossgen2 will still ship NativeAOT compiled on x64 Linux and Windows. R2R+SingleFile+Trimmed elsewhere.

Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>

…#74220)

* Add a way to suppress all trimming warnings

Fixes dotnet#73926.

Also adding AOT analysis suppression for parity.

I didn't port the warning level support because the compat kind of goes beyond that. We can revisit later if needed.

* Update Microsoft.NETCore.Native.targets

Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>

Port of dotnet/linker#2979

Fixes dotnet#73048.

Co-authored-by: Michal Strehovský <MichalStrehovsky@users.noreply.github.com>