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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210

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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
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Backport of #92116 to release/8.0

/cc @jakobbotsch

Customer Impact

The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.

Testing

Regression test included.

Risk

Low.

@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost added the area-CodeGen-coreclr CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI label Sep 18, 2023
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Issue Details

Backport of #92116 to release/8.0

/cc @jakobbotsch

Customer Impact

Testing

Risk

IMPORTANT: If this backport is for a servicing release, please verify that:

  • The PR target branch is release/X.0-staging, not release/X.0.

  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.

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approved. once ready this can be merged

@jeffschwMSFTjeffschwMSFT added the Servicing-approved Approved for servicing release label Sep 18, 2023
@jeffschwMSFTjeffschwMSFT added this to the 8.0.0 milestone Sep 18, 2023
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@carlossanlop
carlossanlop merged commit db172b4 into release/8.0Sep 18, 2023
@carlossanlop
carlossanlop deleted the backport/pr-92116-to-release/8.0 branch September 18, 2023 17:23
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
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Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
the 
area-CodeGen-coreclr
CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
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approved. once ready this can be merged
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@carlossanlop
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carlossanlop
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backport/pr-92116-to-release/8.0

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September 18, 2023 17:23
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
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Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
the 
area-CodeGen-coreclr
CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
Assignees:-
Labels:
area-CodeGen-coreclr
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approved. once ready this can be merged
@jeffschwMSFTjeffschwMSFT
added
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Closed

@carlossanlop
carlossanlop
merged commit db172b4
into
release/8.0Sep 18, 2023
@carlossanlop
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backport/pr-92116-to-release/8.0

branch
September 18, 2023 17:23
@radicalradical
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
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Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
the 
area-CodeGen-coreclr
CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
Assignees:-
Labels:
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Milestone:-
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Sep 18, 2023
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approved. once ready this can be merged
@jeffschwMSFTjeffschwMSFT
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merged commit db172b4
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release/8.0Sep 18, 2023
@carlossanlop
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September 18, 2023 17:23
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
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edited by jakobbotsch

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Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
the 
area-CodeGen-coreclr
CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
Assignees:-
Labels:
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Milestone:-
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approved these changes
Sep 18, 2023
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approved. once ready this can be merged
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
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Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
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Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
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approved. once ready this can be merged
@jeffschwMSFTjeffschwMSFT
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@carlossanlop
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
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Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
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CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
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Labels:
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approved. once ready this can be merged
@jeffschwMSFTjeffschwMSFT
added
the 
Servicing-approved
Approved for servicing release
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Sep 18, 2023
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Sep 18, 2023
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Sep 18, 2023

Closed

@carlossanlop
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merged commit db172b4
into
release/8.0Sep 18, 2023
@carlossanlop
carlossanlop
deleted the

backport/pr-92116-to-release/8.0

branch
September 18, 2023 17:23
@radicalradical
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
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var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
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[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck by github-actions[bot] · Pull Request #92210 · dotnet/runtime · GitHub
Skip to content
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck - #92210
Merged
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Sep 18, 2023
Merged
[release/8.0] JIT: Extract all side effects of the index in optRemoveRangeCheck#92210
carlossanlop merged 1 commit into
release/8.0from 
backport/pr-92116-to-release/8.0
Conversation
@github-actions
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commented
Sep 18, 2023•

edited by jakobbotsch

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Contributor
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
The JIT may silently discard some side effects that are part of the 'index' argument of some HW intrinsics.
Testing
Regression test included.
Risk
Low.
@jakobbotsch
JIT: Extract all side effects of the index in optRemoveRangeCheck
4b94cf4
optRemoveRangeCheck extracts only GTF_ASG from the bounds check. If the
BOUNDS_CHECK is complex, that results in silently dropping side effects
on the floor (see the example case).
The ideal fix is that we should always extract all side effects from the
index and length operands, however this has large regressions because
the length typically has an ARR_LENGTH that we then extract. This PR
instead has a surgical fix for the problem case that can be backported
to .NET 8. It extracts all side effects from the index, but keeps
extracting only GTF_ASG from the length to get around the issue
mentioned above.
Fix#91862
@ghostghost
added
the 
area-CodeGen-coreclr
CLR JIT compiler in src/coreclr/src/jit and related components such as SuperPMI
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Issue Details
Backport of #92116 to release/8.0
/cc @jakobbotsch
Customer Impact
Testing
Risk
IMPORTANT: If this backport is for a servicing release, please verify that:
  • The PR target branch is release/X.0-staging, not release/X.0.
  • If the change touches code that ships in a NuGet package, you have added the necessary package authoring and gotten it explicitly reviewed.
Author:github-actions[bot]
Assignees:-
Labels:
area-CodeGen-coreclr
Milestone:-
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approved. once ready this can be merged
@jeffschwMSFTjeffschwMSFT
added
the 
Servicing-approved
Approved for servicing release
label
Sep 18, 2023
@jeffschwMSFTjeffschwMSFT
added this to the 8.0.0 milestone
Sep 18, 2023
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mentioned this pull request
Sep 18, 2023

Closed

@carlossanlop
carlossanlop
merged commit db172b4
into
release/8.0Sep 18, 2023
@carlossanlop
carlossanlop
deleted the

backport/pr-92116-to-release/8.0

branch
September 18, 2023 17:23
@radicalradical
mentioned this pull request
Sep 26, 2023
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mentioned this pull request
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