Set pRetVal as NULL on error inside 'VIRTUALCommitMemory' (dotnet/coreclr#7920)

Commit migrated from https://github.com/dotnet/coreclr/commit/b4a5de28efa0fdde7c74287cda31b658e11f7ebc

Merge pull request dotnet/coreclr#7917 from pgavlin/VSO280120

Fix VSO280120.

Commit migrated from https://github.com/dotnet/coreclr/commit/5adc178013c069cb9b50456740dcb79ef61e14f8

Fix VSO280120.

st.lclFld decomposition was splitting a st.lclFld into two of the same
without bumping the destination var's ref count.

Commit migrated from https://github.com/dotnet/coreclr/commit/7266fa1aaa5678962de142868438ba6e6716c102

Check pointer before dereferencing it (dotnet/coreclr#7930)

Commit migrated from https://github.com/dotnet/coreclr/commit/e568823f22ec1dccc4ea785630c837e776d4ee09

Merge pull request dotnet/coreclr#7953 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/140b2bdeefc49455d087358dfd40ff1cc2303dc8

Merge pull request dotnet/coreclr#7943 from sivarv/rotateFix

Exclude GT_ROL/ROR from ==/!= 0 compare peep optimization

Commit migrated from https://github.com/dotnet/coreclr/commit/a4e26c85b3de677df72c1beb94844e0e52243170

Specify .NETCoreApp,Version=v1.1 for test projects (dotnet/coreclr#7937)

Commit migrated from https://github.com/dotnet/coreclr/commit/eb36c1bae2560f728768fba8a9044acccef520ca

Fix build break

[tfs-changeset: 1636334]

Commit migrated from https://github.com/dotnet/coreclr/commit/cf3279c0f3dbc65b495bbe335d71132dbdb125fb

Merge pull request dotnet/coreclr#7951 from jkotas/revert-correct-parameter-names

Revert "Correct parameter names."

Commit migrated from https://github.com/dotnet/coreclr/commit/26fa7fac1cffa75ee8f572bf725b5ad2efcecb17

Revert "Correct parameter names."

This reverts commit dotnet/coreclr@0cae769f3c60bf2a696d02a88527a46d5b211cd5.

Commit migrated from https://github.com/dotnet/coreclr/commit/a655471b021c18c969c79a49a693e39c7aec51b3

Merge pull request dotnet/coreclr#7950 from jkotas/revert-parameter-name-changes

Revert "Correct parameter names."

Commit migrated from https://github.com/dotnet/coreclr/commit/23b5645f7f90cb5842130394b4edab0f1bfa6bbd

Revert "Correct parameter names."

This reverts commit dotnet/coreclr@a212082aa4cea8529b4c78844e2a7408ff6f7969.

Commit migrated from https://github.com/dotnet/coreclr/commit/bf2d7261d5be3c2cec6937da56c2c5ed2f0901a7

[ARM] Implement BitPosition with arm intrinsics (dotnet/coreclr#7819)

Commit migrated from https://github.com/dotnet/coreclr/commit/478591ee6c7b09c0c7165d1c85a05463fd070db4

Merge pull request dotnet/coreclr#7904 from shrah/master

Update S.R.InteropServices to ns2.0

Commit migrated from https://github.com/dotnet/coreclr/commit/91f1b9d1519a40a1b3153d7b6dbb716a5bd704bd

Fix build break 814276: FEATURE_SPAN_OF_T disabled in runtime but enabled in DAC

[tfs-changeset: 1636322]

Commit migrated from https://github.com/dotnet/coreclr/commit/19e352fdd52eec39fe7e04798fa3bbadf2f6aa88

Merge pull request dotnet/coreclr#7944 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/45ab32327d565a36fe0ed03bc85ffdd5220a3cf2

Expose missing API in models.xml (dotnet/coreclr#7940)

progress towards https://github.com/dotnet/corefx/issues/12812 and https://github.com/dotnet/corefx/issues/12398

Commit migrated from https://github.com/dotnet/coreclr/commit/0aba9c62db8b8c998466175d4951a01212cf57fb

Update GCInfoDecoder with CoreRT changes (dotnet/coreclr#7938)

Porting most of the changes from https://github.com/dotnet/corert/pull/2116 to make GCInfoDecoder compile in CoreRT to keep the different copies in sync.

Commit migrated from https://github.com/dotnet/coreclr/commit/efbd7a0ffb8ea6bb8e9fc3b273482cfd7bd7d5cd

Rotate Left/Right xarch instructions don't set ZF and ZF flag.

Commit migrated from https://github.com/dotnet/coreclr/commit/b82ba8b2940673d4ca61bc3407eb022e32153e5a

Fix GitHub build break caused by change dotnet/coreclr#1636179

[tfs-changeset: 1636227]

Commit migrated from https://github.com/dotnet/coreclr/commit/da879d9237dc34a5ba9728358b7f78fc1981fc68

Enable the rest of netstandard1.7 globalization APIs (dotnet/coreclr#7935)

* Enable more netstandard 1.7 Globalization APIs

* Enable Windows support for the new APIs

* Fix spaces and line alignments

Commit migrated from https://github.com/dotnet/coreclr/commit/98b795e2a7d76c0d854084add431d362394e9800

Merge pull request dotnet/coreclr#7923 from AndyAyersMS/FixNoCandidateBug

Jit: spill stack for non-candidate calls

Commit migrated from https://github.com/dotnet/coreclr/commit/0112e877e29426464844dd6575ad1808caf37267

CrossGen: Copy all entries of Debug Directory Table (dotnet/coreclr#7849)

Fixes issue dotnet/coreclr#6482.

Commit migrated from https://github.com/dotnet/coreclr/commit/4810efadf35a76774cccad7398ae8c528a3c24ab

Fix build break 814217  by removing inconsistencies between BCL and runtime

[tfs-changeset: 1636179]

Commit migrated from https://github.com/dotnet/coreclr/commit/ee38f0cde26d486bdbe7dbbf83ea286c408e790f

Handle simd checks in OptimizeRangeCheck

When the index is a constant, this code applies to `GT_SIMD_CHK` equally
well as it applies to `GT_ARR_BOUNDS_CHECK`.

Commit migrated from https://github.com/dotnet/coreclr/commit/10beb3d4f7ee6f4149c0c231824205df3847ad6e

Use nameof throughout mscorlib (dotnet/coreclr#7929)

Commit migrated from https://github.com/dotnet/coreclr/commit/e74cdcb1ed6021eaf03eea5ee7f6ba3c6b403daf

Merge pull request dotnet/coreclr#7677 from CarolEidt/StructOpts

Enable optimization of structs

Commit migrated from https://github.com/dotnet/coreclr/commit/9c95461a7200b9df71e8b76963fe072d6fb9c39b

Merge pull request dotnet/coreclr#7926 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/09c9b00d90301adc03655690d34aeacfefedddc8

Merge pull request dotnet/coreclr#7883 from adiaaida/fixDecomposeRotate

Fix DecomposeRotate for > 32 case

Commit migrated from https://github.com/dotnet/coreclr/commit/60ad12e769327953de1da7896ab72cea1cb69221

Use resolver to get IL header and size (dotnet/coreclr#7924)

Commit migrated from https://github.com/dotnet/coreclr/commit/18915473b567619700bd44dd64d4bb22184889e1

Fix build break on x86

[tfs-changeset: 1636135]

Commit migrated from https://github.com/dotnet/coreclr/commit/bdeef6f3007f74ada484238e326195e31ed0853b

Use normal verbosity logging when building tests (dotnet/coreclr#7921)

Test build log file is ~4GB with diag verbosity. With normal it's about 20MB.
This seems to speed up the test build for me considerably.

See dotnet/coreclr#7916.

Commit migrated from https://github.com/dotnet/coreclr/commit/d3e9e0013c551ec6741af0a45eb6b234089afe74

Move SR adapter into root (dotnet/coreclr#7925)

CoreFX creates SR in the System namespace. While putting the CoreCLR SR
adapter in the root may be unconventional, it allows us to keep the
shared code identical.

Commit migrated from https://github.com/dotnet/coreclr/commit/d347f4dfd1be33ac2745e3eaca4dfec964b5db99

Merge pull request dotnet/coreclr#7915 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/3210f68d86002ae54ae8edc773a29bb1a1316f47

Merge pull request dotnet/coreclr#7912 from JosephTremoulet/FlagVectorCounts

Flag vector counts

Commit migrated from https://github.com/dotnet/coreclr/commit/2db6cc80eb35e56c57f7108ab04f7648ae3d0471

Merge pull request dotnet/coreclr#7910 from JosephTremoulet/FixInitTest

Fix check for initial induction variable value

Commit migrated from https://github.com/dotnet/coreclr/commit/cebc34d9dfb081922e26e8defd2cc160e9a1fec8

Fix check for initial induction variable value

Checking that `head` dominates `entry` is insufficient, becuase there may
be a codepath from `head` through other nodes that modify the induction
variable to `entry`.  Check instead that all preds of `entry` are either
`head` or in the loop.

Resolves dotnet/coreclr#7906.

Commit migrated from https://github.com/dotnet/coreclr/commit/87531155e8eb0591e9c37f14536e7c98d3409276

Merge pull request dotnet/coreclr#7909 from JosephTremoulet/FixLoopEntryCheck

Skip removed loops in `optBlockIsLoopEntry`

Commit migrated from https://github.com/dotnet/coreclr/commit/7f8ca8da2bf90eac03dc831d2201103ada71dfe5

Fix build break

[tfs-changeset: 1636112]

Commit migrated from https://github.com/dotnet/coreclr/commit/5d1ebcb2f21577a3d8dbb481ca68c4c57a4cec7c

Jit: spill stack for non-candidate calls

Closes dotnet/coreclr#7907.

Spill the evaluation stack at non-candidate calls since the call may
modify locals or args that are currently live on the stack.

In the attached test case I can't get the problematic IL sequence to
happen for the `F0` variant, but it is there for the `F1` variant.

No diffs seen in corlib or any of the framework assemblies that are
run via jit-dasm.

Commit migrated from https://github.com/dotnet/coreclr/commit/3b2ade83046ab7b56c7f335389b29faf2835c97e

Merge pull request dotnet/coreclr#7854 from dotnet-bot/master-UpdateDependencies

Update CoreClr, CoreFx to beta-24631-02, beta-24631-01, respectively (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/89f083007641857171a9512dbd96bd1732840621

Merge pull request dotnet/coreclr#7918 from RussKeldorph/repoint-corefx-1.1.0

Make dotnet/coreclr reference corresponding dotnet/corefx branch

Commit migrated from https://github.com/dotnet/coreclr/commit/f3c19d782ae9d2575cedd9f1a8c2e2bdc081200e

Merge pull request dotnet/coreclr#7867 from Clockwork-Muse/ArgumentException

Replace hardcoded parameter names to ArgumentException with nameof

Commit migrated from https://github.com/dotnet/coreclr/commit/f8b8b6ab80f1c5b30cc04676ca2e084ce200161e

Make dotnet/coreclr reference corresponding dotnet/corefx branch

We run CoreFx tests under JitStress modes in CoreCLR.  Previously, we were
always pulling down CoreFx master, which is bad for CoreCLR release
branches when things are out of synch.

Commit migrated from https://github.com/dotnet/coreclr/commit/19647a3e4855063298c1b5056944b18c9dd96267

Merge pull request dotnet/coreclr#7885 from pgavlin/VSO278376.2

Fix VSO 278376.

Commit migrated from https://github.com/dotnet/coreclr/commit/ebf165edad0b59d86e4e70bfcf21ae876cc13b95

Merge pull request dotnet/coreclr#7905 from pgavlin/VSO279380

Fix VSO 279380.

Commit migrated from https://github.com/dotnet/coreclr/commit/9153cc2b686cda4b4daf4dddf24aad0ec964e6ec

Add LPFLG_SIMD_LIMIT flag

This flag identifies loops whose limit was a Vector<T>.Count expression.
This can be used in heuristics to target more aggressive optimizations at
SIMD code.

Commit migrated from https://github.com/dotnet/coreclr/commit/d2e74ab5dd97c0a93306083c95a9a72d6a105d27

Merge pull request dotnet/coreclr#7852 from AndyAyersMS/InlinerSmallFixes

Inliner: Fix LegacyPolicyAssert; Dump prejit noinline reasons

Commit migrated from https://github.com/dotnet/coreclr/commit/d8b20289ae438d0e864272221c07a6b9b799061f

Fix DecomposeRotate for > 32 case

In DecomposeRotate, we had a bug where we assumed loOp1 was
always gtLong's op1 and hiOp1 is always gtLong's op2 when we
call RepresentOpAsLocalVar, which is not true in the > 32 case, where we
swap hi and lo before generating the shift instructions for the rotate.
This change refactors the code so that we can correctly call
RepresentOpAsLocalVar with which of gtLong's ops hi and lo are.

Commit migrated from https://github.com/dotnet/coreclr/commit/f2dc0a9fb1319a8984baa7d1b2d81856628fe513

A couple of changes included:
      - Make sure we have a way to disable building with the Roslyn compiler. That should only happen in the internal build.
      - Update the FeatureSpanOfT to also condition on using the latest compiler
      - Introduce an if/def in string.cs for code that uses the ref locals / ref return.
      - Make sure we only include the CryptographicException when building CoreCLR
      - Update the PInvokeMap.txt file to include the right set of APIs.
      - Remove duplicated APIs from PInvokeMap.txt

[tfs-changeset: 1636041]

Commit migrated from https://github.com/dotnet/coreclr/commit/a5b89cbe429ccbc3a3ef9751ba9587f7ad540f6d

Merge pull request dotnet/coreclr#7884 from AlexGhiondea/Port_SecureString

Bring to CoreCLR the SecureString implementation from CoreFx.

Commit migrated from https://github.com/dotnet/coreclr/commit/8c641772e31e902541ade4a2d0ac6259aa7a2f03

Add GTF_ICON_SIMD_COUNT flag

This flag is used to indicate that an integer constant in the IR is the
result of replacing the Vector<T>.Count intrinsic.  This can be used to
drive heuristics focusing more aggressive optimizations on SIMD code.

Commit migrated from https://github.com/dotnet/coreclr/commit/197e6619adf3d5b9f7a0c2c1320a0b4bc3363776

Skip removed loops in `optBlockIsLoopEntry`

This allows running this utility downstream of loop unrolling.

Commit migrated from https://github.com/dotnet/coreclr/commit/77398bcc4f1a54222f7fb71a48bdc4ad32618e37

Merge pull request dotnet/coreclr#7886 from jkotas/SpanOfT

Merge SpanOfT branch into master

Commit migrated from https://github.com/dotnet/coreclr/commit/f42984160f5f9407f70ebc2e86edfcf226fccd81

Fix VSO 279380.

The liveness pass attempts to remove dead stores that it encounters
during its liveness computation. Successfully removing a dead store,
however, may invalidate the results of the computation. Therefore, the
pass operates as a fixed-point algorithm: it recomputes liveness until
either the contents of the function do not change or the removed code
does not change the results.

When running liveness on LIR, the correct flag--`fgStmtRemoved`--was not
being set if a dead store was succesfully removed. This caused the
liveness pass to terminate early and produce invalid results in certain
cases. This fix sets `fgStmtRemoved` when a dead store is successfully
removed in an LIR block.

Commit migrated from https://github.com/dotnet/coreclr/commit/318945fdff3670103f97d05c317123c7ab2ef0d6

Update S.R.InteropServices to ns2.0

This is the final diff with net standard 2.0 except the SecureString functions. In particular,it adds the following:

M Marshal.BindToMoniker(System.String)
M Marshal.ChangeWrapperHandleStrength(System.Object,System.Boolean)
M ExternalException.ToString
T HandleRef

Commit migrated from https://github.com/dotnet/coreclr/commit/d054bb5ca408523a1985e2c044e0e76e4da9d616

Merge pull request dotnet/coreclr#7758 from pgavlin/VSO267565

Fix P/Invoke cookie passing on x86.

Commit migrated from https://github.com/dotnet/coreclr/commit/a1b899b9e67426a7cdbb69ca2be708745c126b59

Fix VSO 278376.

genFloatToFloatCast was not checking whether or not its source operand
was an in-memory, register-optional node before comparing its source
register against its target register. This caused an assert in checked
builds (and SBCG in release builds) because the source temp was never
released.

Commit migrated from https://github.com/dotnet/coreclr/commit/c6527c960b52148dd467fa34a3f24fc4305cc352

SecureStringMarshal was not correctly being build for Unix.

Commit migrated from https://github.com/dotnet/coreclr/commit/4c465e097719de065f3c663f5c5ac04773b661db

Merge pull request dotnet/coreclr#7901 from AlexGhiondea/FixBinCompat

Get latest behavior when missing TFM for BinaryCompatibility class

Commit migrated from https://github.com/dotnet/coreclr/commit/ec5868c2d7b316cc810cc6cec4c845e3a7e9936d

Add workaround for JIT crash

Commit migrated from https://github.com/dotnet/coreclr/commit/4c5e9791dcc5b082ae01abc437dcb7456ae3e806

Change Span fields to private readonly + other review feedback

Commit migrated from https://github.com/dotnet/coreclr/commit/c9a481181ea74d3a642d27df1f22404ed73da140

Update CoreClr, CoreFx to beta-24631-02, beta-24631-01, respectively

Commit migrated from https://github.com/dotnet/coreclr/commit/75ebdda045df2cf0931e1cecf5b25f4778c0beb2

When reading the TFM for the BinaryCompatibility class on CoreCLR, set the TFM to be the latest version we have in our code.

This ensures that we are going to get the latest behavior (4.5.2+) for all the quirks that were using that class.

Commit migrated from https://github.com/dotnet/coreclr/commit/c271173aef317bcddc1d6283c82f2c7b2ad52e30

Add the SecureStringMarshal and CryptographicException to model.xml

Commit migrated from https://github.com/dotnet/coreclr/commit/31c93f8b888b4eeb2ea9fa5039e6d3fa239b5b0c

Merge pull request dotnet/coreclr#7897 from stephentoub/stream_copyto

Use ArrayPool in Stream.CopyTo{Async}

Commit migrated from https://github.com/dotnet/coreclr/commit/b0273bc608988926afe8263b2a375e906f13e653

Remove StreamHelpers.ArrayPoolCopy.cs

It's no longer necessary now that Stream.CopyToAsync itself uses ArrayPool.

Commit migrated from https://github.com/dotnet/coreclr/commit/669ce2cff1bc0b19d6ac8e94ea1c5add5e4b797a

Fixing Typo in variable name in DateTime (dotnet/coreclr#7898)

Commit migrated from https://github.com/dotnet/coreclr/commit/33176e660082aadf338ac6823f91e38f0345af70

Avoid boxing in calls to enum's GetHashCode (dotnet/coreclr#7895)

Commit migrated from https://github.com/dotnet/coreclr/commit/f4ba6ee6aeb8e809142b7feab16115166529fc6d

DateTime.ToString() Fast Track for RFC1123 (dotnet/coreclr#7891)

* DateTime.ToString() Fast Track for RFC1123

Commit migrated from https://github.com/dotnet/coreclr/commit/5c0d01c19842049b2389ec9bee2885be918b9597

Fix P/Invoke cookie passing on x86.

On x86, the P/Invoke cookie (when required) is passed on the stack
after all other stack arguments (if any).

Commit migrated from https://github.com/dotnet/coreclr/commit/fe480e99ef007cb8e2948a5646fcb8c62f37e9ff

Use ArrayPool in Stream.CopyTo{Async}

Commit migrated from https://github.com/dotnet/coreclr/commit/7dea66e10861b82f3f90d68194f55cea58462b9d

Add boilerplate doc comments to trivial methods

Commit migrated from https://github.com/dotnet/coreclr/commit/b1ffa422742435069322fc34195a815b6f8f5d2d

Streamline implementation of ToArray to call CopyTo<T> directly
Fix missing pinning in CopyTo<T>
Move and rename some JitHelpers to S.R.CS.Unsafe to make different implementations more similar

Commit migrated from https://github.com/dotnet/coreclr/commit/c718ac41faceec2a69ddcc4eadd3ff1d45eb9141

Fix build break on 32-bit platforms

Commit migrated from https://github.com/dotnet/coreclr/commit/30af1dc05c46c7404423a87c465c9aecd9936719

Disable Span<T> GC reporting under TODO to workaround JIT issue

Commit migrated from https://github.com/dotnet/coreclr/commit/94362accb62557ef74a244216f042b1d843e9c79

added implicit cast operator from ArraySegment to Spans (dotnet/coreclr#7297)

Commit migrated from https://github.com/dotnet/coreclr/commit/ca90acbcf6d31179bcf00cb2652d2ca1d0883019

create ReadOnlySpan<char> from string (dotnet/coreclr#7276)

Commit migrated from https://github.com/dotnet/coreclr/commit/59f652e65f8fd67ca32e19f07f505f079030f02c

added AsBytes() and NonPortableCast() to Span and ReadOnlySpan API (dotnet/coreclr#7220)

* added AsBytes() and NonPortableCast() to Span and ReadOnlySpan API, fixes dotnet/coreclr#7211

* throw when casted types contain pointers

Commit migrated from https://github.com/dotnet/coreclr/commit/93ee105691085f4edef14ff108708b765a9a9d18

Add TryCopyTo and Set methods to Spans API dotnet/coreclr#5857 (dotnet/coreclr#6648)

Commit migrated from https://github.com/dotnet/coreclr/commit/3ba437ef4cd6beb1597742051b1c16310f074794

Fix reference types (dotnet/coreclr#6954)

- Generic ArrayPinningHelper resulted into incorrect array data offset for reference types. Use non-generic one instead.
- Add array covariance checks to guarantee type safety.

Commit migrated from https://github.com/dotnet/coreclr/commit/e7dfda575898129eb77a3a8541990c43c4e29149

Add basic Span<T> test

Commit migrated from https://github.com/dotnet/coreclr/commit/9c7c1b741b132cd78bfc9db2654227bc2aec2e45

Add implementation for hand-written JIT helpers

Commit migrated from https://github.com/dotnet/coreclr/commit/24a8d61949640fe73c4046b1cf710fb3137ef367

Span<T> managed implementation

Commit migrated from https://github.com/dotnet/coreclr/commit/d5d5f8c8a7b5626c9b61c0549f130f0551b509dc

Span support in VM

Commit migrated from https://github.com/dotnet/coreclr/commit/cb17e332f2dc3fc4af31d017f9d09d223c4a57ed

Use Roslyn with ref returns and locals

Commit migrated from https://github.com/dotnet/coreclr/commit/096020e58105ce5a6fbfc64ebe49c98f8beda609

Add FEATURE_SPAN_OF_T

Commit migrated from https://github.com/dotnet/coreclr/commit/d28b09f2cbd36a42b14e82cfccf02414843191df

Work around a Visual C++ silent bad code generation bug (dotnet/coreclr#7890)

Fixes dotnet/coreclr#7837

The full description of the problem is in that issue.

Commit migrated from https://github.com/dotnet/coreclr/commit/3fc65f37cd4bf5989647f6e1a48da6821ea5adbd

Remove unnecessary assert. (dotnet/coreclr#7889)

Remvoe the unneccessary assert that might cause a bug.

fix dotnet/coreclr#6856

Commit migrated from https://github.com/dotnet/coreclr/commit/d64c7d60fcc8132c8a57c5c3c9d6e296232520dd

Cleanup: Remove BitArray from mscorlib (dotnet/coreclr#7888)

Commit migrated from https://github.com/dotnet/coreclr/commit/e507c2856a175696b3f4f9bf952681b0f4e23286

Fix a race condition in the test build (dotnet/coreclr#7810)

* Fix a race condition in the test build

* Move dir.targets to the Tests directory

Commit migrated from https://github.com/dotnet/coreclr/commit/1d49a9b30a5f74827f0372a19aa4537248965f4e

Merge pull request dotnet/coreclr#7882 from JeremyKuhne/fixarraypool

Align ArrayPool to shared code pattern

Commit migrated from https://github.com/dotnet/coreclr/commit/45a489c9c58c53d51e917046abcb1aa98565ee20

DateTime.ToString(“o”) allocates 32 objects, (dotnet/coreclr#7836)

* Enabling a lower allocating DateTime.ToString('o')

Commit migrated from https://github.com/dotnet/coreclr/commit/026beb938949ac4390f67f6c79248fd7be7311c1

Replace BCLDebug with Debug

Commit migrated from https://github.com/dotnet/coreclr/commit/b38525767f7affc5609d13337ee139d8c8738fa8

Bring to CoreCLR the SecureString implementation from CoreFx.

Commit migrated from https://github.com/dotnet/coreclr/commit/ff7437d5352cba8cda36a51c1ef59419917305ec

Align ArrayPool to shared code pattern

Move the ArrayPool code to the shared location. Also use wraps to make
code identical to CoreFX. (Fixing an exception message issue.)

Commit migrated from https://github.com/dotnet/coreclr/commit/6a7f5ead07e244e89df5602a4d5d477aa1f14b4b

Merge pull request dotnet/coreclr#7817 from JeremyKuhne/movefs

Copy CoreFX FileStream to CoreLib

Commit migrated from https://github.com/dotnet/coreclr/commit/81c42cecca5e1b0b802d4df980280750d2e1419e

Remove some unused PAL functions (dotnet/coreclr#7873)

This change removes some unused PAL functions and the corresponding PAL tests.

Commit migrated from https://github.com/dotnet/coreclr/commit/ac0a1464d00edf9f90a6737271197c30fdd32d6e

Merge pull request dotnet/coreclr#7832 from pgavlin/VSO279868

Correct indirect P/Invoke call prlogs on x86.

Commit migrated from https://github.com/dotnet/coreclr/commit/0aa67ff0f125d922effc4ef3526b6d1bf671a692

Merge pull request dotnet/coreclr#3941 from sivarv/MultiRegCallNodes

Design to support Multi-reg GT_CALL/GT_RETURN nodes (for x64/unix, arm64, x86, arm32)

Commit migrated from https://github.com/dotnet/coreclr/commit/06e76c2c258963f4a9af32ae0b9640d9f8949ae2