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Use side-effects of user defined functions in evm code transform. #12132

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merged 2 commits into from
Nov 22, 2022
Merged

Use side-effects of user defined functions in evm code transform. #12132

merged 2 commits into from
Nov 22, 2022

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chriseth
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@chriseth chriseth commented Oct 13, 2021 •
edited by ekpyron
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I tried but failed. Assigning to @ekpyron
Depends on #12759 and #12795

@chriseth chriseth requested a review from ekpyron October 13, 2021 15:52
@chriseth chriseth changed the base branch from develop to applyControlFlowSideEffectsUserDefined October 13, 2021 15:53
@chriseth chriseth changed the title User defined side effects code transform Use side-effects of user defined functions in evm code transform. Oct 13, 2021
@chriseth chriseth force-pushed the applyControlFlowSideEffectsUserDefined branch 2 times, most recently from 3149036 to 785e16f Compare October 25, 2021 14:36
@chriseth chriseth force-pushed the applyControlFlowSideEffectsUserDefined branch 3 times, most recently from 245c277 to be6fb5f Compare November 2, 2021 10:59
Base automatically changed from applyControlFlowSideEffectsUserDefined to develop November 2, 2021 14:50
@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch from 21386df to 89dbc9b Compare November 2, 2021 17:09
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@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch from 4be8f36 to 1a56588 Compare November 4, 2021 12:40
@chriseth chriseth changed the base branch from develop to nondisambiguatedsideeffects November 4, 2021 15:40
@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch from 1a56588 to 7d2fc5a Compare November 4, 2021 15:49
Base automatically changed from nondisambiguatedsideeffects to develop November 4, 2021 17:01
ekpyron
ekpyron reviewed Nov 9, 2021
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libyul/backends/evm/OptimizedEVMCodeTransform.cpp
@@ -490,14 +490,7 @@ void OptimizedEVMCodeTransform::operator()(CFG::BasicBlock const& _block)
createStackLayout(debugDataOf(_functionReturn), exitStack);
m_assembly.appendJump(0, AbstractAssembly::JumpType::OutOfFunction);
},
[&](CFG::BasicBlock::Terminated const&)
{
// Assert that the last builtin call was in fact terminating.
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Yeah - if we wanted to, we could of course drag along the entire logic into the code transform as well and keep validating things here - but I guess it's fine to trust that it's ok.

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I added at least some validation back, even though it relies on functionCall->canContinue to be correct. But conceptually that's fine - the canContinue flag is part of the CFG and the code transform only guarantees correctness relative to the CFG...

ekpyron
ekpyron previously approved these changes Nov 9, 2021
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This just needs simple test updates, but is good to go otherwise, isn't it? So I'm approving modulo the tests.

No gas cost updates on this, though? Makes me wonder if this really just doesn't happen or if the gas expectations are just not properly updated and checked...

@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch 2 times, most recently from 5d64479 to cf443ea Compare November 10, 2021 10:29
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Ok this is weird - now there are gas changes...

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Another optimization here could be that we should not push a return tag for a call to a terminating function.

@ekpyron ekpyron force-pushed the userDefinedSideEffectsCodeTransform branch from 2e34906 to 8a85e7d Compare March 15, 2022 15:45
@ekpyron ekpyron changed the base branch from develop to evmCodeTransformAvoidPops March 15, 2022 15:46
@ekpyron ekpyron force-pushed the userDefinedSideEffectsCodeTransform branch from 8a85e7d to fcdc339 Compare March 15, 2022 15:49
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ekpyron commented Aug 12, 2022

@ekpyron @cameel how about this PR?

Sigh, I thought this was also already merged ages ago :-).
I'll rebase it and we can hope for another review :-).

@ekpyron ekpyron added the priority review We want this get the review of this PR to a conclusion ASAP. label Aug 12, 2022
@ekpyron ekpyron requested a review from cameel August 12, 2022 10:06
@ekpyron ekpyron dismissed a stale review via 2324a15 August 12, 2022 10:09
@ekpyron ekpyron force-pushed the userDefinedSideEffectsCodeTransform branch from 908e93a to 2324a15 Compare August 12, 2022 10:09
@Marenz Marenz force-pushed the userDefinedSideEffectsCodeTransform branch from 2324a15 to 5e63b62 Compare August 25, 2022 11:06
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Marenz commented Aug 25, 2022

I rebased this and updated the gas costs

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This pull request is stale because it has been open for 14 days with no activity.
It will be closed in 7 days unless the stale label is removed.

@github-actions github-actions bot added the stale The issue/PR was marked as stale because it has been open for too long. label Oct 25, 2022
@ekpyron ekpyron removed the stale The issue/PR was marked as stale because it has been open for too long. label Nov 1, 2022
@ekpyron ekpyron force-pushed the userDefinedSideEffectsCodeTransform branch 3 times, most recently from b63d4a4 to 6651394 Compare November 1, 2022 10:22
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@ekpyron ekpyron force-pushed the userDefinedSideEffectsCodeTransform branch from 6651394 to 4c23d00 Compare November 1, 2022 10:37
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ekpyron commented Nov 1, 2022

Unstaled and rebased this once more - this is mainly in dire need of reviews.

If anyone is up for this, ping me and I can walk you trough the PR to help in reviewing.

cameel
cameel previously approved these changes Nov 10, 2022
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Needs another rebase.

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Code looks good!

@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch from 4c23d00 to dd8b3f5 Compare November 14, 2022 18:00
@chriseth chriseth force-pushed the userDefinedSideEffectsCodeTransform branch from dd8b3f5 to 1b6063e Compare November 14, 2022 20:26
ekpyron
ekpyron approved these changes Nov 22, 2022
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Approving based on @chriseth's approval above.

@ekpyron ekpyron merged commit 3109ce2 into develop Nov 22, 2022
@ekpyron ekpyron deleted the userDefinedSideEffectsCodeTransform branch November 22, 2022 13:26
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