Use GeneratedDllImport for blittable p/invokes in System.Diagnostics.Process, System.Diagnostics.Process, System.Diagnostics.FileVersionInfo, System.Runtime.InteropServices.RuntimeInformation (#61532)

* Apply suggestions from code review
Co-authored-by: NAdam Sitnik <adam.sitnik@gmail.com>
Co-authored-by: NJeremy Koritzinsky <jkoritzinsky@gmail.com>

This optimization is only legal if:
1) "Anything" is a sufficiently small constant itself.
2) We are in a context where we know the address will in
   fact be used for an indirection.

It is the second point that is problematic - one would
like to use MorphAddrContext, but it is not suitable
for this purpose, as an unknown context is counted as
an indirecting one. Additionally, the value of this
optimization is rather low. I am guessing it was meant
to support the legacy nullchecks, before GT_NULLCHECK
was introduced, and had higher impact then.

So, just remove the optimization and leave the 5 small
regressions across all of SPMI be.

* SortedList<TKey, TValue> added GetKeyAtIndex, GetValueAtIndex, and SetValueAtIndex

* Update src/libraries/System.Collections/src/System/Collections/Generic/SortedList.cs
Co-authored-by: NEirik Tsarpalis <eirik.tsarpalis@gmail.com>

For very large structs (> 64K in size) poisoning could end up generating
instructions requiring larger local var offsets than we can handle. This
hits IMPL_LIMIT that throws InvalidProgramException. Turn off poisoning
for larger structs that require more than 16 movs to also avoid the
significant code bloat by the singular movs.

This is a less risky version of #61521 for backporting to .NET 6.

Fix #60852

The issue was that VNApplySelectors uses the types
of fields when selecting, but that's not valid for
"the first field" maps.

Mirror how the stores to fields are numbered.

Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

`__DoCrossgen2` appears to be redundant with `__TestBuildMode=crossgen2`.

* Add JsonSerializerOptions.Default

* address feedback

* address feedback

Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

For now there's no functional change to the behavior of the tests,
I have just copied the bits to inject from Jeremy's example in his
pending PR.

I have spot-checked that some of the tests use Main with the
command-line args argument. I'm not changing them in this PR, the
signature only becomes important once we start actually merging
the IL tests and I presume we'll clean that up at that point.

Thanks

Tomas

Contributes to: https://github.com/dotnet/runtime/issues/54512

For now there's no functional change to the behavior of the tests,
I have just copied the bits to inject from Jeremy's example in his
pending PR.

Thanks

Tomas

Contributes to: https://github.com/dotnet/runtime/issues/54512

* embedded size

* next array

* read consistency while rehashing

* comments

* remove CRST_UNSAFE_ANYMODE and COOP mode in the callers

* typo

* fix 32bit builds

* couple changes from review.

* Walk the buckets in resize.

* remove a `REVIEW:` comment.

* Update src/coreclr/vm/dacenumerablehash.inl

PR review suggestion
Co-authored-by: NJan Kotas <jkotas@microsoft.com>

* remove use of `auto`

* DAC stuff

* Constructor and GrowTable are not called by DAC, no need for DPTR, added a comment about a cast.

* SKIP_SPECIAL_SLOTS

* More compact dac_cast in GetNext
Co-authored-by: NJan Kotas <jkotas@microsoft.com>

For now there's no functional change to the behavior of the tests,
I have just copied the bits to inject from Jeremy's example in his
pending PR.

Thanks

Tomas

* Enable new analyzers in global configs

* Address PR feedback

If a generic argument is a primitive type, and it has an interface constraint
that enums don't implement, then partial sharing for that instance is not
useful, since only the specific primitive type instance will be able
to use the shared version.

Fixes https://github.com/dotnet/runtime/issues/54910.

Emit it in the interpreter when a method is inlined or replaced with
an intrinsic. This is needed so the AOT profiler can track these
methods.

When both OSR and PGO are enabled:
* Enable instrumenting OSR methods, so that the combined profile data from
Tier0 plus any OSR variants provide a full picture for subsequent Tier1
optimization.
* Use block profiles for both Tier0 methods that are likely to have patchpoints
and OSR methods.
* Fix phase ordering so partially jitted methods don't lose probes.
* A few more fixes for partial compilation, because the number of things
we think we might instrument and the number of things we end up instrumenting
can differ.
* Also improve the DumpJittedMethod output for OSR, and allow selective dumping
of a particular OSR variant by specifying its IL offset.

The updates on the runtime side are to pass BBINSTR to OSR methods, and to
handle the (typical) case where the OSR method instrumentation schema is a subset
of the Tier0 method schema.

We are still allowing OSR methods to read the profile data. So they are both
profile instrumented and profile optimized. Not clear if this is going to work
well as the Tier0 data will be incomplete and optimization quality may be poor.
Something to revisit down the road.

Implement method name wildcard matching for method descriptions

Globbing doesn't work because we don't have g_pattern_match_simple in eglib.
But a plain '*' wildcard does work.

[DllImportGenerator] Treat pointer fields in structs as blittable regardless of what they point at (#61538)

This was preventing block compaction with loop entry blocks in loops
that had been previously optimized away (and thus removed from the
loop table).

There are a few cases where we now delete dead code that was previously
left in the function. There are a number of spurious local weighting
and IG textual asm diffs changes, possibly due to how PerfScore is implemented
(there are some surprisingly large PerfScore changes in a few cases,
despite no change in (most) generated code).

These are used for example in Span<T>:.ctor ().

[mono][jit] Optimize constrained calls to object.GetHashCode () where the receiver is a gshared type constrained to a primitive type/enum. (#61513)

* Remove all DLLIMPORTGENERATOR_ENABLED usage.

* Explicitly set EnableDllImportGenerator to true in test project.

* Environment.SystemPageSize returns cached value

* we are no longer shipping MS.IO.Redist, so we can use Array.MaxLength directly

* we are no longer shipping MS.IO.Redist, there is no need for File to be partial

* we are no longer shipping MS.IO.Redist, there is no need for FileInfo to be partial

* there is no need for .Win32.cs and .Windows.cs file anymore

Measure browser app start times, 2 measurements implemented.

First to measure till the JS window.pageshow event, second to measure
time when we reach managed C# code.

Example ouput:

    | measurement | time |
    |-:|-:|
    |                    AppStart, Page show |   108.1400ms |
    |                AppStart, Reach managed |   240.2174ms |

* Moving Narrow to implemented using SIMDAsHWIntrinsic

* Moving Widen to implemented using SIMDAsHWIntrinsic

* Fix some handling of Narrow/Widen hwintrinsics

* Ensure that Vector.Widen is still treated as an intrinsic

* Fixing NI_VectorT128_WidenUpper on ARM64 to actually call gtNewSimdWidenUpper

* XARCH: Remove redudant tests for GT_LT/GT_GE relops.

We can now optimize cases such as `(x + y < 0)` or `for (int x = v; x >= 0; x--)`
using the flag tracking logic during the emit stage. Notably, cases that
would generate...

```
add     reg0, reg1
test    reg0, reg0
jge     LABEL
```

now transform to

```
add     reg0, reg1
jns     LABEL
```

This transform is valid for signed GE and signed LT only.

* Add a few asserts related to flag reuse optimizations.

Updating src/tests/Interop/PInvoke/Generics/GenericsNative.Vector* to annotate individual methods as requiring AVX (#61259)

* Updating src/tests/Interop/PInvoke/Generics/GenericsNative.Vector* to annotate individual methods as requiring AVX

* Always use __m256i on XARCH

Don't run if the JIT-EE GUID has changed, since there won't be any collections
to download, so the downloads will fail.

Also update the superpmi-asmdiffs trigger comment.