…alized while we jitted its transition wrapper (#86745)

Adjust the heuristics to take into account recent work on liveness and
assignment decomposition.  Stop phrasing things in terms of code size
(multiplied by basic block weights, which does not make sense).

Fixes #77970

… Build ID 2187956 (#86733)

* Localized file check-in by OneLocBuild Task: Build definition ID 679: Build ID 2187689

* Localized file check-in by OneLocBuild Task: Build definition ID 679: Build ID 2187689

* Initial work to enable EventPipe in Linux

* GCC build break fix

* Only enable Unix

* FB

* restricting iOS

* Update src/coreclr/nativeaot/Directory.Build.props

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

* FB

* license header

* Update src/coreclr/nativeaot/Runtime/eventpipe/ep-rt-aot.h

Co-authored-by: Elinor Fung <elfung@microsoft.com>

* FB

---------

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

…ty returns a sigleton. (#86757)

* Pass SIMD type variables in SIMD registers

* Disable support for 256/512 bit vectors.

---------

Co-authored-by: Zoltan Varga <vargaz@gmail.com>

mono_dbg_debugger_agent_user_break first tries to initialize a context before sending it to the debugger machinery. If, during unwinding, we don't have a saved context, we were passing uninitialized data (with interpreter for example). On some architectures this was making unwinding break in mono_walk_stack_full, because the stack pointer was invalid. This change makes it so we at least pass a valid context.

…ental generator transformations (#86603)

…output to file (#86656)

Updates to NativeAOT event pipe:
- Respect environment variable configuration
- Handle writing out to a file
- Enable tracing/eventpipe/config/name_config_with_pid test, which uses environment variable configuration to write directly to a file.

…nd non-windows platforms (#86729)

Add warnaserror to the Unix send to Helix step to match the windows send to helix step.

* Use cinv instead of csel when possible

* Fix when the operands of conditional select should be reversed

* Scope down the cinv optimisation to local vars

* Use more generic CSINV instead of CINV instruction

* Add support for CSNEG and refactor conditional selects

* Fix initialisation of srcReg2

* Add RequiresProcessIsolation property to fix test failures

* Address review comments - Part 1

* Remove output type from conditional negate tests

* Ensure operands of cneg/cinv are invariants while optimising

* Update tests to the new format

* Use annotations to run tests through the framework

* Fix conditional negate tests

* Handle conditional negate/invert of shifted operands

* [wasm] Install latest LTS npm/node for codespaces

* Fix docker build

…daries. (#86732)

…ough ProjectReferences (#86735)

…6747)

* [wasm] Fix running merged test wrappers in runtime tests

- These were all getting removed because it looked for the incorrect
  script path in case of wasm

* [wasm] Disable a multithreaded runtime test

```
Operation is not supported on this platform.
   at System.Threading.Thread.ThrowIfNoThreadStart(Boolean internalThread)
   at System.Threading.Thread.Start(Boolean captureContext, Boolean internalThread)
   at System.Threading.Thread.Start()
   at MutualThdRecur_fptr.main()
   at Program.<>c__DisplayClass0_0.<<Main>$>g__TestExecutor29|30(TestFilter filter, StreamWriter tempLogSw, StreamWriter statsCsvSw)
```

* [wasm] Disable a failing test in JIT.Performance

`JIT/Performance/CodeQuality/Benchstones/MDBenchI/MDPuzzle/`
#86772

* [wasm] Disable all JIT.Performance tests for now

… Build ID 2188652 (#86779)

* Localized file check-in by OneLocBuild Task: Build definition ID 679: Build ID 2188521

* Localized file check-in by OneLocBuild Task: Build definition ID 679: Build ID 2188521