[Driver][Frontend] Introduce `load-pass-plugin` option #68985

antoniofrighetto · 2023-10-05T14:44:04Z

Allow dynamic loading of LLVM passes via load-pass-plugin option passed to the Swift compiler driver, similarly to current Apple Clang -fpass-plugin option.

Previous discussion: https://forums.swift.org/t/load-external-llvm-pass-plugins-via-swift-frontend/67596

antoniofrighetto · 2023-10-05T14:47:19Z

Please, let me know if anything needs to be improved as far as style conventions et alia is concerned, I'd be happy to do so.

antoniofrighetto · 2023-10-05T15:21:56Z

(cc/ @DougGregor)

antoniofrighetto · 2023-10-17T16:08:47Z

Gentle ping. Any feedback or suggestions would be duly appreciated. Alongside this, I believe the option should be added as part of Options.swift as well. May that be the case? (cc/ @DougGregor, @rintaro).

jslegendre · 2023-10-19T03:02:33Z

Hey, this may not be getting much attention because the internal driver (this one) is considered legacy. The default driver as of Xcode 13 swift-driver. You might have better luck over there.

Note: I'm not affiliated with the Swift project in any way. Just a guy who'd love to see this merged

artemcm · 2023-10-19T17:33:55Z

There was some discussion on this previously in:
#38017

The driver and frontend pieces are separate and yes, proper driver support would mean adding the logic in https://github.com/apple/swift-driver. Legacy (C++-based) driver support being optional/discouraged.

@lhames @aschwaighofer can comment better on the architecture of loading such passes in IRGen.

antoniofrighetto · 2023-10-23T16:26:10Z

Thanks a lot to both for the helpful insights. Support in the new swift-driver should be addressed by swiftlang/swift-driver#1472. The implementation should aim to ensure a clear separation between the driver and the frontend. Also, thanks for sharing #38017, was not aware of this. Reviewed the discussion there carefully, it was very informative.

antoniofrighetto · 2023-10-27T14:52:33Z

Fixed conflicts by rebasing to main, and changed test library type from MODULE to SHARED, as CMake seems to be defaulting to generate the plugin with .so extension on macOS too (rather than .dylib, this was previously leading the unittest to fail).

weliveindetail

The way this patch proposes to load the plugin pass in IRGen looks good. It is exactly what we do in Clang and Flang, and what the documentation recommends.

weliveindetail · 2023-11-06T14:22:34Z

lib/IRGen/IRGen.cpp

+    } else {
+      diagnoseSync(Diags, DiagMutex, SourceLoc(),
+                   diag::unable_to_load_pass_plugin, PluginFile,
+                   toString(PassPlugin.takeError()));


I wonder if the diagnostic handling should remain in performLLVM(). Passing Diags and DiagMutex to performLLVMOptimizations() seems a bit unfortunate. We could instead just return the llvm::Error from here and let the callers take care of it. That would change the return type of the function. A lot of code in include/swift is using llvm::Error already, but I am not sure what the conventions are in Swift. @lhames What do you think?

antoniofrighetto · 2023-11-14T20:29:16Z

Gentle ping (cc/ @lhames).

wsmoses · 2023-11-22T19:36:54Z

Just wanted to express support for this here as it also helps with adding plugins for AD

jslegendre · 2023-11-23T01:08:02Z

Also expressing support for this!

antoniofrighetto · 2024-01-22T16:14:29Z

Rebased to main, dropped unittest in Driver as part of recent legacy driver deprecation, added test coverage exercizing performLLVMOptimization. New driver support ready at swiftlang/swift-driver#1472. Kind ping @lhames, @aschwaighofer, @artemcm, @benlangmuir, @weliveindetail.

antoniofrighetto · 2024-03-25T20:16:39Z

@lhames, @airspeedswift Gentle ping. Any chance of this getting reviewed?

antoniofrighetto · 2024-04-16T09:20:27Z

Kind ping (maybe cc/ @adrian-prantl).

lib/IRGen/IRGen.cpp

test/Frontend/Inputs/TestPlugin.cpp

adrian-prantl

LGTM with a couple of minor comments inside.

antoniofrighetto · 2024-04-30T18:49:07Z

@adrian-prantl Addressed comments and rebased to main, thank you for reviewing this!

adrian-prantl · 2024-05-01T00:55:30Z

@swift-ci test

antoniofrighetto · 2024-05-02T09:35:11Z

Rebased to main, opened sister PR @ swiftlang/llvm-project#8678, reflecting changes (not sure if we should have targeted a different branch instead).

antoniofrighetto · 2024-05-16T16:12:15Z

@adrian-prantl Kind ping on this, CI was previously failing.

antoniofrighetto · 2024-07-31T17:31:31Z

Rebased to main (fixed conflicts), swiftlang/llvm-project#8678 PR rebased to stable/20230725, which should be the expected branch. Very gentle remainder. I do not have commit access, could anyone kindly merge this?

antoniofrighetto · 2024-07-31T19:06:07Z

I assume this should be tested with:

Please test with following PR:
https://github.com/swiftlang/llvm-project/pull/8678
https://github.com/swiftlang/swift-driver/pull/1472

@swift-ci Please test

JDevlieghere · 2024-09-09T15:43:03Z

swiftlang/llvm-project#8678
swiftlang/swift-driver#1472

@swift-ci test

JDevlieghere · 2024-09-10T02:39:04Z

The macOS failure is:

/Users/ec2-user/jenkins/workspace/swift-PR-macos/branch-main/swift/stdlib/private/SwiftPrivate/IO.swift:21:8: error: failed to build module 'Darwin'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 5.9.2 (swiftlang-5.9.2.2.11 clang-1500.1.0.2.2)', while this compiler is 'Apple Swift version 6.1-dev effective-5.10 (LLVM 97c65ef47934098, Swift c06508954544f05)'). Please select a toolchain which matches the SDK.
 19 | #else
 20 | #if canImport(Darwin)
 21 | import Darwin
    |        `- error: failed to build module 'Darwin'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 5.9.2 (swiftlang-5.9.2.2.11 clang-1500.1.0.2.2)', while this compiler is 'Apple Swift version 6.1-dev effective-5.10 (LLVM 97c65ef47934098, Swift c06508954544f05)'). Please select a toolchain which matches the SDK.

edit: should have been fixed by #76344

JDevlieghere · 2024-09-10T02:39:54Z

swiftlang/llvm-project#8678
swiftlang/swift-driver#1472

@swift-ci test macos

weliveindetail · 2024-10-10T12:31:58Z

@JDevlieghere This will be affected by the rebranch isn't it? Any chance it can land before?

artemcm · 2024-10-23T21:13:33Z

@adrian-prantl @JDevlieghere is this good to merge?

adrian-prantl · 2024-10-25T18:30:16Z

I don't have any further concerns with this patch.

Allow dynamic loading of LLVM passes via `load-pass-plugin` option passed to the Swift compiler driver.

antoniofrighetto · 2024-11-07T16:33:29Z

Rebased to main, fixed conflicts (to be tested again as above otherwise CI fails), kind ping for merging this.

aschwaighofer · 2024-11-12T17:46:03Z

@swift-ci test

antoniofrighetto · 2024-11-12T19:47:39Z

@swift-ci test

Thanks, the other two PRs (swiftlang/llvm-project#8678, swiftlang/swift-driver#1472) are also required for the CI to pass.

aschwaighofer · 2024-11-12T19:51:00Z

swiftlang/llvm-project#8678
swiftlang/swift-driver#1472
@swift-ci test

aschwaighofer · 2024-11-12T19:53:24Z

@antoniofrighetto Can you put up a PR against stable/20240723. Swift has rebased against that newer llvm-project branch.

antoniofrighetto · 2024-11-12T20:48:00Z

Done at swiftlang/llvm-project#9586, thanks.

aschwaighofer · 2024-11-14T18:25:36Z

swiftlang/swift-driver#1472
swiftlang/llvm-project#9586
@swift-ci test

antoniofrighetto · 2024-11-19T16:08:25Z

Kind ping (before other rebases conflicts pop up :P)

al45tair · 2024-11-21T14:58:57Z

@antoniofrighetto @aschwaighofer
The test for this is failing under ASAN because of an ODR rule violation (there are two vtables for llvm::circular_raw_ostream). See #77771.

antoniofrighetto requested review from artemcm, tshortli, hborla, slavapestov and xedin as code owners October 5, 2023 14:44

xedin removed their request for review October 5, 2023 23:05

antoniofrighetto force-pushed the feature/load-pass-plugin branch from 09d9fde to 2293235 Compare October 6, 2023 08:31

antoniofrighetto mentioned this pull request Oct 23, 2023

Add support for load-pass-plugin option swiftlang/swift-driver#1472

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antoniofrighetto force-pushed the feature/load-pass-plugin branch from 2293235 to 177dc53 Compare October 27, 2023 14:51

weliveindetail reviewed Nov 6, 2023

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antoniofrighetto force-pushed the feature/load-pass-plugin branch from 177dc53 to 7055ddf Compare January 22, 2024 16:12

antoniofrighetto force-pushed the feature/load-pass-plugin branch from 7055ddf to 564940c Compare January 29, 2024 13:56

marcobrador mentioned this pull request Feb 16, 2024

Support Swift code open-obfuscator/o-mvll#9

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antoniofrighetto force-pushed the feature/load-pass-plugin branch from 564940c to bfc69de Compare April 30, 2024 18:47

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antoniofrighetto mentioned this pull request May 2, 2024

[lldb][Plugins][Swift] Reflect API changes in SwiftExpressionParser swiftlang/llvm-project#8678

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antoniofrighetto force-pushed the feature/load-pass-plugin branch from f4d021f to 0489398 Compare July 31, 2024 17:28

antoniofrighetto requested a review from rjmccall as a code owner July 31, 2024 17:28

[Driver][Frontend] Introduce load-pass-plugin option

377c03f

Allow dynamic loading of LLVM passes via `load-pass-plugin` option passed to the Swift compiler driver.

antoniofrighetto force-pushed the feature/load-pass-plugin branch from 0489398 to 377c03f Compare November 7, 2024 16:32

antoniofrighetto mentioned this pull request Nov 12, 2024

[lldb][Plugins][Swift] Reflect API changes in SwiftExpressionParser swiftlang/llvm-project#9586

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aschwaighofer merged commit c5463bd into swiftlang:main Nov 20, 2024
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al45tair mentioned this pull request Nov 21, 2024

🟠 OSS Swift CI: oss-swift-incremental-ASAN-RA-macos failed: test: Frontend/load-pass-plugin.swift (exit code 1) #77771

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[Driver][Frontend] Introduce load-pass-plugin option #68985

[Driver][Frontend] Introduce load-pass-plugin option #68985

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[Driver][Frontend] Introduce `load-pass-plugin` option #68985

[Driver][Frontend] Introduce `load-pass-plugin` option #68985

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