Include dependently promoted fields in SSA by SingleAccretion · Pull Request #77238 · dotnet/runtime

SingleAccretion · 2022-10-19T23:03:35Z

Allowing for their participation in the SSA-based optimizations.

This changes two significant IR invariants:

It is not longer a correctness issue for morph to not mark a dependently promoted struct DNER / multi-reg - we remove the one hard requirement for this determination from the front-end. The soft requirement of CQ and making ref counting happy stays.
Uses of promoted locals can now implicitly refer to SSA variables. They are not renamed. The canonical example of such promoted locals are those created for multi-reg returns.

This change also makes lvIsMultiRegRet mostly unnecessary, though I plan to scale back its usage in a separate change.

2nd Round Diffs

ghost · 2022-10-19T23:03:50Z

Tagging subscribers to this area: @JulieLeeMSFT, @jakobbotsch
See info in area-owners.md if you want to be subscribed.

Issue Details

Allowing for their participation in the SSA-based optimizations.

This changes two significant IR invariant:

It is not longer a correctness issue for morph to not mark a dependently promoted struct DNER / multi-reg - we remove the one hard requirement for this determination from the front-end. The soft requirement of CQ and making ref counting happy stays.
Uses of promoted locals can now implicitly refer to SSA variables. They are not renamed. The canonical example of such promoted locals are those created for multi-reg returns.

This change also makes lvIsMultiRegRet mostly unnecessary, though I plan to scale back its usage in a separate change.

Author:	SingleAccretion
Assignees:	-
Labels:	`area-CodeGen-coreclr`, `community-contribution`
Milestone:	-

1) The definition of SIMPLE_NUM_COUNT was wrong. 2) SsaNumInfo::Composite, in the compact case, did not clear the old value. 3) SsaNumInfo::Composite, in the outlined case, did not copy the already (compactly) encoded simple names.

The load path needs to use the offset relative to the store's target location.

SingleAccretion · 2022-10-21T16:39:00Z

@dotnet/jit-contrib

This will need to be stressed and fuzzed.

EgorBo · 2022-10-21T17:02:42Z

/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress, Fuzzlyn

azure-pipelines · 2022-10-21T17:03:12Z

Azure Pipelines successfully started running 3 pipeline(s).

SingleAccretion · 2022-10-22T17:19:31Z

The CI results are a bit hard to interpret for known-ness right now (e. g. libraries stress has a little under 900 failures), Fuzzlyn looked clean-ish at least.

BruceForstall · 2022-10-26T05:09:25Z

Stress should be cleaner now.

BruceForstall · 2022-10-26T05:09:30Z

/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress, Fuzzlyn

azure-pipelines · 2022-10-26T05:10:04Z

Azure Pipelines successfully started running 3 pipeline(s).

SingleAccretion · 2022-10-26T17:51:07Z

Some (aka a lot of) stress (and Fuzzlyn) failures with an assert:

 JIT\Directed\Convert\value_numbering_checked_casts_of_constants\value_numbering_checked_casts_of_constants.cmd [FAIL]
Assert failure(PID 4612 [0x00001204], Thread: 3588 [0x0e04]): Assertion failed 'isCandidateVar(fieldVarDsc) == isMultiReg' in 'ValueNumberingCheckedCastsOfConstants:<TestCastingSingleToInt64>g__ConfirmSingleOneFullDecrementUnderByteMaxValueCastToInt64IsFoldedCorrectly|10_27()' during 'Linear scan register alloc' (IL size 92; hash 0xfaebe139; Tier0-MinOpts)
File: D:\a\_work\1\s\src\coreclr\jit\lsrabuild.cpp Line: 1269
Image: C:\h\w\BB5E09CF\p\corerun.exe

Edit: this is fallout from #76263. Fix incoming...

SingleAccretion · 2022-10-26T19:28:00Z

Apart from the above, failures looked known.

AndyAyersMS · 2022-10-27T17:08:12Z

Hmm, odd that it got closed -- not sure how this happened.

SingleAccretion · 2022-10-27T17:12:15Z

Presumably the same curious GH behavior we've seen once, with this line

should fix stress failures

in #77502 to blame...

AndyAyersMS · 2022-11-04T15:33:57Z

Going to bounce this so it runs with ssa checking.

AndyAyersMS · 2022-11-04T15:45:36Z

/azp run runtime-coreclr jitstress, runtime-coreclr libraries-jitstress, Fuzzlyn

azure-pipelines · 2022-11-04T15:46:15Z

Azure Pipelines successfully started running 3 pipeline(s).

AndyAyersMS · 2022-11-04T18:15:14Z

libraries jitstress has some known failures; coreclr jitstress was running clean recently.

SingleAccretion · 2022-11-04T18:57:53Z

Starting to collect failures.

Stress
- PAL memcpy tests: not related; opened c_runtime.memcpy PAL tests are failing #77914.
- GC/Regressions/Github/Runtime_76219: does look related, I remember seeing it fail the same way some time ago, and we have an identical, relatively recent, failure.
Libraries stress:
- GC/LargeMemory/Regressions/largearraytest: Test failure GC/LargeMemory/Regressions/largearraytest/largearraytest.sh #77477.
- Test failure System.Transactions.Tests.OleTxTests.ImplicitDistributedTransactions_cannot_be_changed_after_being_read_as_true #77241
- Microsoft.VisualBasic.Core.Tests: https://dev.azure.com/dnceng-public/public/_build/results?buildId=73254&view=ms.vss-test-web.build-test-results-tab&runId=1512312&resultId=197563&paneView=dotnet-dnceng.dnceng-anon-build-release-tasks.helix-anon-test-information-tab - Assert failure: !PreemptiveGCDisabled() #70307:

 # ChildEBP RetAddr 00 02fe9c48 724aa24d coreclr!FailFastOnAssert+0x21 [D:\a\_work\1\s\src\coreclr\utilcode\debug.cpp @ 60] 01 02fe9c48 724a9967 coreclr!_DbgBreakCheck+0x329 [D:\a\_work\1\s\src\coreclr\utilcode\debug.cpp @ 247] 02 02fe9cb8 724a9c91 coreclr!_DbgBreakCheckNoThrow+0x51 [D:\a\_work\1\s\src\coreclr\utilcode\debug.cpp @ 307] 03 02fe9d54 72147fe8 coreclr!DbgAssertDialog+0x20c [D:\a\_work\1\s\src\coreclr\utilcode\debug.cpp @ 459] 04 02fe9dd4 725aff92 coreclr!Thread::DetachThread+0xcf [D:\a\_work\1\s\src\coreclr\vm\threads.cpp @ 981] 05 02fe9e40 725c2396 coreclr!TlsDestructionMonitor::~TlsDestructionMonitor+0x8f [D:\a\_work\1\s\src\coreclr\vm\ceemain.cpp @ 1764] 06 02fe9e58 7727ea4e coreclr!__dyn_tls_dtor+0x86 [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\tls\tlsdtor.cpp @ 123] WARNING: Stack unwind information not available. Following frames may be wrong.
07 02fe9e78 7724eeb6 ntdll!RtlDecompressBuffer+0xde
08 02fe9ec8 772a3c6a ntdll!LdrShutdownThread+0x386
09 02fe9f10 77262d7f ntdll!LdrSetAppCompatDllRedirectionCallback+0x1052a
0a 02fe9fa8 77263886 ntdll!LdrShutdownProcess+0x15f
0b 02fea07c 7689b3e3 ntdll!RtlExitUserProcess+0x96
0c 02fea090 00000000 kernel32!ExitProcess+0x13

Fuzzlyn:
- JIT: Assertion failed '!"Write to unaliased local overlaps outstanding read"' during 'Rationalize IR' #77773.

SingleAccretion · 2022-11-04T20:43:29Z

The failures have been accounted for above, I believe all are known.

kunalspathak · 2022-11-07T15:55:28Z

Some (aka a lot of) stress (and Fuzzlyn) failures with an assert:

 JIT\Directed\Convert\value_numbering_checked_casts_of_constants\value_numbering_checked_casts_of_constants.cmd [FAIL]
Assert failure(PID 4612 [0x00001204], Thread: 3588 [0x0e04]): Assertion failed 'isCandidateVar(fieldVarDsc) == isMultiReg' in 'ValueNumberingCheckedCastsOfConstants:<TestCastingSingleToInt64>g__ConfirmSingleOneFullDecrementUnderByteMaxValueCastToInt64IsFoldedCorrectly|10_27()' during 'Linear scan register alloc' (IL size 92; hash 0xfaebe139; Tier0-MinOpts)
File: D:\a\_work\1\s\src\coreclr\jit\lsrabuild.cpp Line: 1269
Image: C:\h\w\BB5E09CF\p\corerun.exe

Edit: this is fallout from #76263. Fix incoming...

This was also hit in Antigen in yesterday's run. Was this ever fixed?
Edit: It was on linux/arm

SingleAccretion · 2022-11-07T16:04:34Z

Was this ever fixed?

Yes, it was fixed in #77502. Evidently not fully...

EgorBo · 2022-11-10T17:46:27Z

Improvements on arm64-ubuntu: dotnet/perf-autofiling-issues#9679

Remove quirks
1498da4

ghost added community-contribution Indicates that the PR has been added by a community member area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI labels Oct 19, 2022

build-analysisBot mentioned this pull request Oct 20, 2022
Tracking issue for CI build timeouts #76454
Closed

SingleAccretion mentioned this pull request Oct 20, 2022
Add IR support for modeling multiple SSA definitions as one store #76139
Merged

SingleAccretion force-pushed the Dependent-Fields-In-SSA-Upstream branch 2 times, most recently from 3a19a20 to 295c147Compare October 20, 2022 18:32

SingleAccretion added 3 commits October 20, 2022 21:39

Early prop fix for call asgs
dba93b8

Include all tracked locals in SSA
0273062

Remove a (now incorrect) comment
f6da0ad

SingleAccretion force-pushed the Dependent-Fields-In-SSA-Upstream branch from 295c147 to 497d70aCompare October 20, 2022 18:39

SingleAccretion added 3 commits October 21, 2022 17:17

Fix a typo
af6327c

Encoding fixes
99ed47c
1) The definition of SIMPLE_NUM_COUNT was wrong. 2) SsaNumInfo::Composite, in the compact case, did not clear the old value. 3) SsaNumInfo::Composite, in the outlined case, did not copy the already (compactly) encoded simple names.

Fix store numbering
44238c8
The load path needs to use the offset relative to the store's target location.

SingleAccretion force-pushed the Dependent-Fields-In-SSA-Upstream branch from 497d70a to 44238c8Compare October 21, 2022 14:17

SingleAccretion marked this pull request as ready for review October 21, 2022 16:38

SingleAccretion mentioned this pull request Oct 23, 2022
Remove GT_ADDR nodes #11057
Closed

SingleAccretion mentioned this pull request Oct 26, 2022
Update lvaEnregMultiRegVars and lvaEnregEHVars when switching to MinOpts #77502
Merged

AndyAyersMS closed this in #77502 Oct 27, 2022

SingleAccretion reopened this Oct 27, 2022

AndyAyersMS closed this Nov 4, 2022

AndyAyersMS reopened this Nov 4, 2022

AndyAyersMS reviewed Nov 4, 2022
View reviewed changes

Comment threadsrc/coreclr/jit/valuenum.cpp Outdated

Clarify 'fieldValueOffset' calculations
dd88620

SingleAccretion mentioned this pull request Nov 5, 2022
DNER multi-reg locals early if they cannot be enregistered #77943
Closed

AndyAyersMS approved these changes Nov 6, 2022
View reviewed changes

AndyAyersMS merged commit 6bae351 into dotnet:mainNov 6, 2022

SingleAccretion deleted the Dependent-Fields-In-SSA-Upstream branch November 6, 2022 17:45

ghost locked as resolved and limited conversation to collaborators Dec 10, 2022

Uh oh!

Conversation

SingleAccretion commented Oct 19, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

ghost commented Oct 19, 2022

Uh oh!

SingleAccretion commented Oct 21, 2022

Uh oh!

EgorBo commented Oct 21, 2022

Uh oh!

azure-pipelinesBot commented Oct 21, 2022

Uh oh!

SingleAccretion commented Oct 22, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

BruceForstall commented Oct 26, 2022

Uh oh!

BruceForstall commented Oct 26, 2022

Uh oh!

azure-pipelinesBot commented Oct 26, 2022

Uh oh!

SingleAccretion commented Oct 26, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

SingleAccretion commented Oct 26, 2022

Uh oh!

AndyAyersMS commented Oct 27, 2022

Uh oh!

SingleAccretion commented Oct 27, 2022

Uh oh!

AndyAyersMS commented Nov 4, 2022

Uh oh!

Uh oh!

AndyAyersMS commented Nov 4, 2022

Uh oh!

azure-pipelinesBot commented Nov 4, 2022

Uh oh!

AndyAyersMS commented Nov 4, 2022

Uh oh!

SingleAccretion commented Nov 4, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

SingleAccretion commented Nov 4, 2022

Uh oh!

kunalspathak commented Nov 7, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

SingleAccretion commented Nov 7, 2022• edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

EgorBo commented Nov 10, 2022

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

5 participants

SingleAccretion commented Oct 19, 2022•
edited
Loading

SingleAccretion commented Oct 22, 2022•
edited
Loading

SingleAccretion commented Oct 26, 2022•
edited
Loading

SingleAccretion commented Nov 4, 2022•
edited
Loading

kunalspathak commented Nov 7, 2022•
edited
Loading

SingleAccretion commented Nov 7, 2022•
edited
Loading