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Skip unreachable code when early return can be statically analysed #8890

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merged 15 commits into from
Aug 1, 2024

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@sokra sokra commented Jul 31, 2024

Description

  • tracks early returns and their conditions
  • replaces unreachable code with "TURBOPACK unreachable"
  • finds hoisted declarations in unreachable code and keeps them

Testing Instructions

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sokra commented Jul 31, 2024

@sokra sokra marked this pull request as ready for review July 31, 2024 09:41
@sokra sokra requested a review from a team as a code owner July 31, 2024 09:41
@sokra sokra requested review from ForsakenHarmony and kdy1 July 31, 2024 09:42
@sokra sokra changed the title handle early returns Skip unreachable code when early return can be statically analysed Jul 31, 2024
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✅ This change can build next-swc

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github-actions bot commented Jul 31, 2024

🟢 Turbopack Benchmark CI successful 🟢

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github-actions bot commented Jul 31, 2024

⚠️ CI failed ⚠️

The following steps have failed in CI:

  • Turbopack Rust tests (mac/win, non-blocking)

See workflow summary for details

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Other codes (except the tiny concerns) look good to me/

@sokra sokra enabled auto-merge (squash) August 1, 2024 07:49
@sokra sokra merged commit 5fc75a3 into main Aug 1, 2024
56 of 57 checks passed
@sokra sokra deleted the sokra/early-return branch August 1, 2024 07:56
ForsakenHarmony pushed a commit to vercel/next.js that referenced this pull request Aug 1, 2024
…ercel/turborepo#8890)

### Description

* tracks early returns and their conditions
* replaces unreachable code with `"TURBOPACK unreachable"`
* finds hoisted declarations in unreachable code and keeps them

### Testing Instructions

<!--
  Give a quick description of steps to test your changes.
-->
ForsakenHarmony pushed a commit to vercel/next.js that referenced this pull request Aug 1, 2024
* vercel/turborepo#8879 <!-- Niklas Mischkulnig -
Convert MDX errors into issues -->
* vercel/turborepo#8873 <!-- Tobias Koppers -
smarter logical combination that keeps truthy/falsy/nullish property -->
* vercel/turborepo#8890 <!-- Tobias Koppers - Skip
unreachable code when early return can be statically analysed -->
ForsakenHarmony pushed a commit to vercel/next.js that referenced this pull request Aug 1, 2024
…ercel/turborepo#8890)

### Description

* tracks early returns and their conditions
* replaces unreachable code with `"TURBOPACK unreachable"`
* finds hoisted declarations in unreachable code and keeps them

### Testing Instructions

<!--
  Give a quick description of steps to test your changes.
-->
ForsakenHarmony pushed a commit to vercel/next.js that referenced this pull request Aug 16, 2024
* vercel/turborepo#8879 <!-- Niklas Mischkulnig -
Convert MDX errors into issues -->
* vercel/turborepo#8873 <!-- Tobias Koppers -
smarter logical combination that keeps truthy/falsy/nullish property -->
* vercel/turborepo#8890 <!-- Tobias Koppers - Skip
unreachable code when early return can be statically analysed -->
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2 participants