Merge pull request dotnet/coreclr#12570 from mskvortsov/FixVisitOperands

Add a missing case to GenTree::VisitOperands()

Commit migrated from https://github.com/dotnet/coreclr/commit/e221e6dacc3f99fa07a8ed85118ddced08fa536e

Merge pull request dotnet/coreclr#11815 from hseok-oh/ryujit/struct_split_small

[ARM32/RyuJIT] Lowering: split struct argument less than 16 bytes

Commit migrated from https://github.com/dotnet/coreclr/commit/3289665bd616268501e190ff39fc51a9f2f55253

Merge pull request dotnet/coreclr#12576 from gsfreema/readme-fixes

README.md link and grammar fixes

Commit migrated from https://github.com/dotnet/coreclr/commit/f2a6b13e6f1335fb2f2a8ddfc2510a77adf0931c

Merge pull request dotnet/coreclr#12559 from rartemev/fix_build_break

Fix build failure in internal builds

Commit migrated from https://github.com/dotnet/coreclr/commit/f7844f7373b66e434e7be183615559f915835ce4

Update optdata to version 20170630-0138

Commit migrated from https://github.com/dotnet/coreclr/commit/ee112f8a92c073b6b9b3fe16f7e5a9e7a5d35a2d

README.md link and grammar fixes

Fixing various typos, grammar mistakes, and broken links in the root README.md file.

Commit migrated from https://github.com/dotnet/coreclr/commit/18ac27fa981bba7c316693ed396bd4f816658932

Add a missing case to GenTree::VisitOperands()

Commit migrated from https://github.com/dotnet/coreclr/commit/d91e7dc88fe9739b78152b2d3ac11ce1777560e9

Merge pull request dotnet/coreclr#12566 from adityamandaleeka/fix_license_header_winrtdq

Fix license header on new file

Commit migrated from https://github.com/dotnet/coreclr/commit/f89ac1a9ac71e2f0f21bdb0b2fc6f68d71a3021c

Merge pull request dotnet/coreclr#12540 from pgavlin/OperandVisitor

Add a generic operand visitor to `GenTree`.

Commit migrated from https://github.com/dotnet/coreclr/commit/f9153d20ab61808722a8a2d91c75e08e32a0c765

[ARM32/RyuJIT] Lowering: enable passing split struct less than 16 bytes

- Enable passing split struct (less than 16 bytes) in registers and on stack
morphing phase
Lowering phase
- Block at LSRA phase - add NYI_ARM
- Print split struct

Commit migrated from https://github.com/dotnet/coreclr/commit/049c9d4f5325478d6e4df762424d8d49c7963427

[RyuJIT/ARM32] Fix using fgMorphMultiregStructArg for mkrefany

Block using fgMorphMultiregStructArg function for mkrefany.
Morphing for mkrefany struct is already done in fgMorphArgs function.

Commit migrated from https://github.com/dotnet/coreclr/commit/cca7f0222af47a93a735e69e59e0b76c237f5f88

Fix license header on new file.

Commit migrated from https://github.com/dotnet/coreclr/commit/6ef9321c6db490fc16b63c948e27645c4931c913

Merge pull request dotnet/coreclr#12535 from adityamandaleeka/dispatcher_queues_coreclr

Support DispatcherQueues when getting WinRT dispatcher

Commit migrated from https://github.com/dotnet/coreclr/commit/f024e166d69ba4d82544e868a5544d7edece5e43

Make libnuma soft dependency (dotnet/coreclr#12556)

Load libnuma dynamically, so it is not linked at compile time and
hence avoid making it a hard dependency at runtime.

Commit migrated from https://github.com/dotnet/coreclr/commit/08d6a06f1da7be86ef34284fccf63cea68c6d90f

Merge pull request dotnet/corertdotnet/coreclr#4004 from dotnet/nmirror

Merge nmirror to master

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/aa451e8fcf9edd2fda0d93b3b2155f6d7a7d7216

Use public ConditionalWeakTable iterator (dotnet/coreclr#12564)

Port https://github.com/dotnet/corert/pull/4030/commits/dotnet/coreclr@a3837f7fc60a1b7db872cfef6463f74fb1ffeafb to CoreCLR

Commit migrated from https://github.com/dotnet/coreclr/commit/8279ba85a79c5293aa06b56a4ff8de67971a43c4

Move JIT_TrialAlloc declaration into jitinterfacex86.cpp (dotnet/coreclr#12562)

Commit migrated from https://github.com/dotnet/coreclr/commit/a8ec0b0421c89f0c301c647f95aa336bc45bbf28

Remove m_ prefixes in BinaryReader.cs (dotnet/coreclr#12561)

Commit migrated from https://github.com/dotnet/coreclr/commit/31cc09c7c2f5dbd43c3bff24bc2f94eec2cf4085

Merge pull request dotnet/coreclr#12557 from briansull/add-verbose

Implement a /verbose flag to show the verbose output from crossgen

Commit migrated from https://github.com/dotnet/coreclr/commit/1ee52501659bbe65cf90688f5be9783df97de11b

Address PR feedback.

Commit migrated from https://github.com/dotnet/coreclr/commit/39fdf401557137118a6f313a730ead2cb6e036dd

Format code.

Commit migrated from https://github.com/dotnet/coreclr/commit/2d67ab00478aaf2957b36d62de5a8526e65b4c56

Implement a /verbose flag to show the verbose output from crossgen

Added info on /verbose option to PrintUsageHelper()
Convert printf(ascii) to wide strings in methodtable.cpp
In build.cmd echo the crossgen /CreatePdb command line

Commit migrated from https://github.com/dotnet/coreclr/commit/60e038191307535ea6c073b8fb249dce45b071f7

Fix build failure in internal builds

Commit migrated from https://github.com/dotnet/coreclr/commit/a3648f6139f5a7d9b091e530caeeff907ecf6f72

Change LSRA to use the operand visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/365b48a50a379916bc7543488db73d892f39ce30

Refactor LSRA's operand use builder.

Commit migrated from https://github.com/dotnet/coreclr/commit/5fcc39e514645dd7c33b327250e7b1c8c86814f4

Replace some uses of the operand iterator with the operand visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/a42c14bf27c651669e9f8f2dfa3bd2d74662d427

Add a generic operand visitor to `GenTree`.

This visitor accepts any invokable argument (e.g. lambdas, functors,
etc.) with the following signature:

    `GenTree::VisitResult Visitor(GenTree* operand)`

This visitor is typically more efficient than the operand iterator
due to better opportunities for inlining and shorter dynamic path
lengths when deciding which operands need to be visited.

Commit migrated from https://github.com/dotnet/coreclr/commit/9f9a7efe3950c8cb22ffdfc7074e26c350bb4b6a

Make ResourceManager netstandard 2.0 API behave correctly (dotnet/coreclr#12536)

* Make ResourceManager netstandard 2.0 API behave correctly

In netstandard 2.0 we have enabled the APIs like GetObject, GetStream,..etc. these are not functioning correctly in UWP apps because was assuming we always uses PRI files. The changes here is to initialize the managed resources too and let these APIs behave as if we are running inside desktop app.

* added #ifdef

* Remove the throwing as PRI can handle case insenitive lookup

* remove un-needed resources

Commit migrated from https://github.com/dotnet/coreclr/commit/88e0428caa33fd04bd8f5f8bc1a60b6a44b93622

Merge pull request dotnet/coreclr#12532 from jashook/fix_arm64_and_arm32_package_restore

Fix the package restore for arm64 and arm32

Commit migrated from https://github.com/dotnet/coreclr/commit/07258b7ac54cef46ef143b450d6e607fd4a017db

Use the number of GC threads to calculate spin count (dotnet/coreclr#12525)

* use the number of gc threads to calculate spin count

* use n_heaps

Commit migrated from https://github.com/dotnet/coreclr/commit/3bd82d1935806a87d668f4ea102de37077996005

Fix the package restore for arm64 and arm32

Commit migrated from https://github.com/dotnet/coreclr/commit/0489dac17a1bf5d9698ae4717e5cfe0b762e5a7d

Merge pull request dotnet/coreclr#12538 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/c611d0dcde99aab29490d3cf62f86cc79462db9a

Merge pull request dotnet/coreclr#12360 from wateret/armel/dblarg

[RyuJIT/armel] Support `double` argument passing

Commit migrated from https://github.com/dotnet/coreclr/commit/f8267f2f8f1f458cf15690c2e5ed68c8b1c56916

Delete file moved to shared partition

Commit migrated from https://github.com/dotnet/coreclr/commit/3bda40fda2b222a2e4ebe9dc3dbee603ebeeecab

Merge pull request dotnet/corertdotnet/coreclr#4004 from dotnet/nmirror

Merge nmirror to master

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/649ea074fb8d48b3c2e93857efb80a9649484745

Reduce the verbosity of optdata sync on stdout (dotnet/coreclr#12543)

Set the "StandardOutputImportance" attribute on the RestoreOptData
target to low, matching the "RestoreNETCorePlatforms" target. Logging
to sync.log remains verbose, but stdout on the console is made much less
verbose.

Fixes dotnet/coreclr#12127

Commit migrated from https://github.com/dotnet/coreclr/commit/e6fe4aad7fdc7cf4db42753e8ad6e73fa0a7db15

Fix GC contract violation (dotnet/coreclr#12542)

Commit migrated from https://github.com/dotnet/coreclr/commit/03bec77fb4efaa397248a2b9a35c547522221447

Delete test that tests pinning of System.Object (dotnet/coreclr#12537)

See dotnet/corefxdotnet/coreclr#21673 for motivation. This test fails on CoreRT.

Commit migrated from https://github.com/dotnet/coreclr/commit/98d19c577c4fdeade912eceef4575e984ec3ce19

[RyuJIT/armel] Support `double` argument passing

- Fix for putting `double` arguments between Lowering and Codegen phase
- Rename GenTreeMulLong to GenTreeMultiRegOp
  GT_PUTARG_REG could be GenTreeMultiRegOp on RyuJIT/arm

Fix dotnet/coreclr#12293

Commit migrated from https://github.com/dotnet/coreclr/commit/55eede4c2ad0c5f4849fda9544138f9096847ba4

[x86/Linux] Adjust SP in throwing helper block (dotnet/coreclr#12504)

* [x86/Linux] Adjust SP in throwing helper block

* Fix format error

* Use funKind intead of siInFuncletRegion

* Use genSPtoFPdelta (and add some comments)

* Fix a typo

* Revert irrelevant changes

Commit migrated from https://github.com/dotnet/coreclr/commit/cee0765158694f0715440987974d34dea8e6edd9

Update to master prerelease2 tag

release/uwp6.0 is going to use preview1 and we don't want to publish
different versions of the package with the same package identity

Commit migrated from https://github.com/dotnet/coreclr/commit/dfa1494d79b3a09e67c0f5e6e0a85a20105c3118

Merge pull request dotnet/coreclr#12528 from pgavlin/NoPgoOption

Add a flag to build.{sh,cmd} to disable PGO.

Commit migrated from https://github.com/dotnet/coreclr/commit/b38cfeb7b14de9ce182f06b8840f1ccd80ec0095

Merge pull request dotnet/coreclr#12534 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/6c99e9ed55429545624a0932897d9686fa582fb1

Merge pull request dotnet/coreclr#12487 from pgavlin/GenTreeVisitor

Add a new, faster tree walker.

Commit migrated from https://github.com/dotnet/coreclr/commit/92206031704cd7e4249a8c67d75d42f776b81ae2

Remove unreached() macro

[tfs-changeset: 1663789]

Commit migrated from https://github.com/dotnet/coreclr/commit/aafcd933142ef63655b9e4616fb5e712e1c67afc

Support DispatcherQueues when getting WinRT sync context.

Commit migrated from https://github.com/dotnet/coreclr/commit/5d4d1875f3bdaf2edea806cd0b0f60bcfe69e00e

Merge pull request dotnet/coreclr#12531 from dotnet-bot/from-tfs

Merge changes from TFS

Commit migrated from https://github.com/dotnet/coreclr/commit/69afbba312e00845cc1440f0e1be2f04a41be841

Fix a release build break.

[tfs-changeset: 1663777]

Commit migrated from https://github.com/dotnet/coreclr/commit/a36de6744ebccc7610f9c0d7d97c9f2a19d10727

Move ReaderWriterLockSlim to shared partition

Commit migrated from https://github.com/dotnet/coreclr/commit/474f4197003266237c8063cc0fa910baf702cc53

Enable SourceBranch to be passed from the pipeline parameters

Enable SourceBranch to be passed from the pipeline parameters

Commit migrated from https://github.com/dotnet/coreclr/commit/7ba62129cd7ab7604f7e9ae4a116853a828b5c7f

Format code.

Commit migrated from https://github.com/dotnet/coreclr/commit/0fc2159768651b006e6b72425d97d4f28c92ce54

Address PR feedback.

Commit migrated from https://github.com/dotnet/coreclr/commit/71e5888964dcb725088a0d4b54027b72bcf0eb2d

Fix build error

[tfs-changeset: 1663755]

Commit migrated from https://github.com/dotnet/coreclr/commit/2713c145e485eb78126a1548d91a07295bc13c5e

Fix usage style.

Commit migrated from https://github.com/dotnet/coreclr/commit/81f16e41fed6f2d5c21268d5aecf37352493a7a3

Reduce excessive loop count in interlocked tests (dotnet/coreclr#12222)

Commit migrated from https://github.com/dotnet/coreclr/commit/f7f694965abaf85362fb4e6edb221d679bd59cd0

Use proper ifdef for EmitProfilerComCallXXX methods (dotnet/coreclr#12502)

Commit migrated from https://github.com/dotnet/coreclr/commit/aff5a085543f339a24a5e58f37c1641394155c45

Fix debug assert (dotnet/coreclr#12496)

Commit migrated from https://github.com/dotnet/coreclr/commit/cad25d9ce6b6d3d9a1f539cf456c2edc8c2c34af

Fix build error when FEATURE_READYTORUN_COMPILER is disabled (dotnet/coreclr#12505)

Commit migrated from https://github.com/dotnet/coreclr/commit/6decf1a8fea4432d2ab82cceaf73d26bed23db75

Add a flag to build.{sh,cmd} to disable PGO.

This is helpful when performing JIT throughput measurements.

Commit migrated from https://github.com/dotnet/coreclr/commit/3c1c553bc9c27dab04258ce184c74af151f6a311

[RyuJIT/ARM32] Enable passing large split struct argument (dotnet/coreclr#12050)

* [RyuJIT/ARM32] Enable passing large split struct

This enables passing split struct larger than 16 bytes.
To support splitted struct, it defines new GenTree type - GenTreePutArgSplit.
GenTreePutArgSplit is similar with GenTreePutArgStk,
but it is used for splitted struct only
and it has additional field to save register information.
GenTreePutArgSplit node is generated in lower phase.

* Apply reviews: split struct argument passing

- Fix some comments:
genPutArgSplit, GenTreePutArgStk, GenTreePutArgSplit, NuwPutArg, ArgComplete
- Add assertion check in genPutArgSplit, genCallInstruction
- Rename variable: baseReg
- Change flag for GenTreePutArgSplit: _TARGET_ARM && !LEGACY_BACKEND
- Change type of gtOtherRegs in GenTreePutArgSplit
- Remove duplicated code: NewPutArg
- Implement spill & restore flag for GenTreePutArgSplit

* Apply reviews

- Rebase
- Update managing spillFlag for split struct
- Implement spill & restore code generation
- Fix typos and rename variables
- Fix bug related to print gentree for split struct

* Fix bug and comments

- Fix bug in regset.cpp
- Add comments in morph.cpp's NYI_ARM
- Fix comments' typo in lsraarmarcp.cpp

Commit migrated from https://github.com/dotnet/coreclr/commit/0ce4fab8647ac3fbc200c27adfcf31aaae0f660b

Fix contributing workflow commit message link

A recent change moved the Commit Messages section to a different
markdown file.  This change fixes that link, and provides relative
paths for links where appropiate.  This keeps people in their own
fork of the repo when browsing on github.

Commit migrated from https://github.com/dotnet/coreclr/commit/116178885631e4c6bb87d4dcf2f5e6d82e77850b

Enable SourceBranch to be passed from the pipeline parameters

sets SkipBranchAndVersionOverrides=false so SourceBranch and SourceVersion
are correctly passed through the pipeline file.

set SkipBranchAndVersionOverrides=true for the publish definitions as
they don't build from the SourceBranch and instead use a different
tools branch to do their work.

Commit migrated from https://github.com/dotnet/coreclr/commit/9797dac62b0b890f726e1fca61fbb95a075ac0e3

Convert lvaMarkLclRefs to a visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/b12d7c81d32518419ca95971399e570181f591a9

Convert lva{Inc,Dec}RefCntsCB to a visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/76809bbdbd1300da55cdda2c5187e4637f8b2223

Convert rationalize to the generic visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/8882080df4e9680cd7d085f3e4ae3e38a8f424ba

Convert fgWalkTree{Pre,Post,} to use the new visitor.

Commit migrated from https://github.com/dotnet/coreclr/commit/8fd10714b71a557d4cb28c161ef428985defad5d

Add a generic tree visitor.

This visitor replaces the function-pointer-based walkers with a more
modern design centered around the curiously-recurring-template pattern.

Commit migrated from https://github.com/dotnet/coreclr/commit/71d4577e35c723c01063a8479efbdc0242a557dc

Cleanup some instances of project.json from the repo (dotnet/coreclr#12484)

* Replace ScriptGenerator project.json with csproj

* Update project.json occurrences in docs
Fix few typos.

* Remove project.json comments

Commit migrated from https://github.com/dotnet/coreclr/commit/217ab30d021f27be6fe4f35126a88e592366acbf

Fix remove in list (dotnet/coreclr#12497)

`remove` uses `erase` to delete the entry in list.
Since `erase` returns the next iterator, the iterator shouldn't be increased
when the entry is found and deleted.

Commit migrated from https://github.com/dotnet/coreclr/commit/68673ed19e7c5e849258ef4be90ec9577226ee64

Remove disabled tests for Marshal.IsComObject(null) (dotnet/coreclr#12359)

Commit migrated from https://github.com/dotnet/coreclr/commit/f8a084647feb9b7223c44cd51710a6ad47e6de11

Partially remove relocations from Class section of NGEN-ed images (dotnet/coreclr#11962)

* Remove relocations for ParamTypeDesc::m_TemplateMT.

* Remove relocations for LayoutEEClass::m_LayoutInfo.m_pFieldMarshalers.

* Prepare RelativeFixupPointer.

* Remove relocations for FieldMarshaler::m_pFD and FieldMarshaler_*::m_*.

Commit migrated from https://github.com/dotnet/coreclr/commit/44f57065649af5f8bcbb7c71d827221a7bc1bf7a

Remove unused declaration (dotnet/coreclr#12501)

Commit migrated from https://github.com/dotnet/coreclr/commit/7cc721ec6ec56c998d66f1d57e7341cf7141a8a3

spmi add R2R field to getFieldInfo (dotnet/coreclr#12498)

Commit migrated from https://github.com/dotnet/coreclr/commit/92edd69161c6ed23a2a28c17e212c37153edcf97

Fix JIT_NewArr1 8-byte alignment for ELEMENT_TYPE_R8 on x86.

Commit migrated from https://github.com/dotnet/coreclr/commit/91163768c4eec24379491e0bff49e8c4333f53f1

Fix rough edges after CLI update (dotnet/corertdotnet/coreclr#3983)

* Move build-restore.cmd back to build-managed

buildpipeline needs to be updated to make this split

* Cleanup dir.props/dir.targets

* Add back VS clues

* Reformat whitespaces to match VS convention

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/980ecbb740bda25ecea00affa49a47acfded6b19

Fix bad range check in TextInfo.IndexOfStringOrdinalIgnoreCase (dotnet/coreclr#12478)

Breaks:

   int idx = "\uabcd".IndexOf("", 1, StringComparison.OrdinalIgnoreCase);

should return 1, returns -1 instead.

(propagated fix from CoreRT)

Commit migrated from https://github.com/dotnet/coreclr/commit/53900a63a76cce3e054bd93d1533348edc2c71f1

Implement JIT_NewArr1_R2R as R2R wrapper for JIT_NewArr1 to support both MethodTable-based and TypeDesc-based helpers. (dotnet/coreclr#12475)

Related issue: dotnet/coreclr#12463

Commit migrated from https://github.com/dotnet/coreclr/commit/3951920cbd825c2b2251ba3572ca354f887d6033

Fix legacyjit CI testing

Commit migrated from https://github.com/dotnet/coreclr/commit/dfa46929e97aa6e090ad06ea9192b1814291135e

Merge pull request dotnet/coreclr#12473 from hqueue/arm/ryujit/lsra_use_helper

[RyuJIT/ARM32][WIP] Update LSRA with helpers

Commit migrated from https://github.com/dotnet/coreclr/commit/f1499d2214d0d8d630bff30045ce520b73d4356c

[Linux][GDB-JIT] Fix memory leak (dotnet/coreclr#12452)

Use NewArrayHolder for pVars in LocalsInfo class

Commit migrated from https://github.com/dotnet/coreclr/commit/81925e260279a88d268dcfd862b43d49254f9def

[RyuJIT/ARM32] Update LSRA with new helper

- Introduce updatePreviousInterval()
- Update LSRA with helper

Signed-off-by: Hyung-Kyu Choi <hk0110.choi@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/45c302fcf3c9e847af41a53f2e97ed87d0c366ef

support spmi collection for r2r calls. (dotnet/coreclr#12343)

* CreateAgnostic_CORINFO_SIG_INFO

Also you pSig_Index always when it is index in the buffer map,
as we do for sigInst_classInst_Index for example.

* spmi Restore_CORINFO_RESOLVED_TOKENout

delete another duplicate.

* SpmiDumpHelper

* spmi cleaning: GetFunctionEntryPoint and GetAddressOfPInvokeTarget

* support GetReadyToRunHelper and GetReadyToRunDelegateCtorHelper in spmi.

* Fix typo that annoys desktop build.

* spmi GetReadyToRunDelegateCtorHelper

* spmi: use agnostic type for GetReadyToRunDelegateCtorHelper value.

* spmi dump Agnostic_CORINFO_LOOKUP

add stubLookup to dmpGetCallInfo

* clean dmpGetMethodSig and dmpGetTailCallCopyArgsThunk

Commit migrated from https://github.com/dotnet/coreclr/commit/b05580db650323a5933957742b0b622ae1abaf53

[RyuJIT/ARM32] Use helper for LSRA

Signed-off-by: Hyung-Kyu Choi <hk0110.choi@samsung.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/e38a867f0c122c87f63e0064524ff61364e6d73a

Merge pull request dotnet/coreclr#12460 from pgavlin/SinglePassRationalize

Rephrase rationalize as a single IR walk.

Commit migrated from https://github.com/dotnet/coreclr/commit/2fd5d167de39a73020ce616d8605097f38f29dfd

Format code.

Commit migrated from https://github.com/dotnet/coreclr/commit/85d222d4868f9081a1104e37f82f066be9266b8a

Merge pull request dotnet/coreclr#12423 from CarolEidt/ContainDoNotEnreg

Mark lvDoNotEnregister lclVars as contained

Commit migrated from https://github.com/dotnet/coreclr/commit/f94ef83a2cafd2ef2db6594a365677924b25f039

Merge pull request dotnet/coreclr#12457 from pgavlin/RewriteIntrinsicsRefactor

Refactor the rationalizer's instrinsic rewriter.

Commit migrated from https://github.com/dotnet/coreclr/commit/54e8503de4a20dd666bac6448f6296e459891a38

Rephrase rationalize as a single IR walk.

This walk performs both pre- and post-order visits. The pre-order visit
is responsible for rewriting intrinsics as user calls where necessary;
the post-order visit is resonsible for converting HIR nodes into LIR
nodes.

Commit migrated from https://github.com/dotnet/coreclr/commit/7a050280050cac265d6ab8eb1708fab934c492e2

Use LIR utilities in the intrinsic rewriter.

This simplifies the code a bit and prepares it for some changes to
perform single-pass rationalization.

Commit migrated from https://github.com/dotnet/coreclr/commit/115a357068bde4ba5a1432d9f5811c3446a830e7

Merge pull request dotnet/coreclr#12440 from pgavlin/MaintainIsUnusedValue

Maintain `LIR::IsUnusedValue` in the backend.

Commit migrated from https://github.com/dotnet/coreclr/commit/6fdfb022b10a2713ed468af67eb604956a80d381

Update a header comment.

Commit migrated from https://github.com/dotnet/coreclr/commit/030b7a12ec0d172fbd22a94c07fe55659d4dfc74

Format code and address PR feedback.

Commit migrated from https://github.com/dotnet/coreclr/commit/c4ceaacb4f02ee2bd2b7fb57d1271f14b2615a14

Replace array type handle with method table in arguments of array allocation helpers (dotnet/coreclr#12369)

* Remove direct usage of type handle in JIT_NewArr1, with except of retrieving template method table.

* Assert that array type descriptor is loaded when array object's method table is set.

* Pass template method tables instead of array type descriptors to array allocation helpers.

Commit migrated from https://github.com/dotnet/coreclr/commit/8cc7e35dd0a625a3b883703387291739a148e8c8

Refactor the rationalizer's instrinsic rewriter.

Change its two constituent static methods into instance methods.

Commit migrated from https://github.com/dotnet/coreclr/commit/8694f596b13536bf82b5ab0b5e0582529da13bc2

Merge pull request dotnet/coreclr#12441 from pgavlin/TryGetUseInline

Avoid the use edge iterator in `TryGetUse`.

Commit migrated from https://github.com/dotnet/coreclr/commit/959dacc9f0b09eb9f8c418eabb1b9180ceb6f5ac

Merge pull request dotnet/corertdotnet/coreclr#3969 from dotnet/nmirror

Merge nmirror to master

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
Commit migrated from https://github.com/dotnet/coreclr/commit/2c7a7011d940f906dceabb80fe82a81f80cdc656

Format code.

Commit migrated from https://github.com/dotnet/coreclr/commit/ba8c88f51a1439f15ee4e72b7cf43417d5d0b99b

Return early in `TryGetUse` for unused nodes.

Now that `IsUnusedValue` is maintained during the first half of the
backend, `TryGetUse` can terminate early if it is set.

Note that this may return false negatives if the `IsUnusedValue` flag is
incorrectly set, but remains correct if said flag is incorrectly
cleared.

Commit migrated from https://github.com/dotnet/coreclr/commit/422be4021c63bc2cee06773e4678058eddcf4a54

Remove an IR walk during lowering.

Now that the `IsUnusedValue` flag is maintained by decomposition and
lowering, it does not need to be recalculated before LSRA.

Commit migrated from https://github.com/dotnet/coreclr/commit/0dcf3843ccbeb1e1937d84cfbe155a7e55fd38c2

Maintain `LIR::IsUnusedValue` in the backend.

This flag indicates whether or not the SDSU temp produced by a node is
ever read. This information is needed by the register allocator, but is
also useful in other parts of the compiler (for example, `TryGetUse` can
return immediately if this flag is set). Setting this flag properly in
rationalize and maintaining it through decomposition and lowering allows
us to remove an IR walk immediately prior to LSRA.

Commit migrated from https://github.com/dotnet/coreclr/commit/04668c8a76da2b1ee07b48e00ae0376ddfbad960