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#new-pass-manager

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Designing a Minimal LLVM New Pass Manager Pass: Requirements, Boundaries, and Checks

A concise guide to creating a minimal LLVM New Pass Manager pass, covering requirements, the smallest workable design, trust boundaries, operational checks, failure modes, and verification steps.

llvm new-pass-manager compiler-optimizationTasadduq Burneyowner34.8K rep · 21 Sept 2026, 08:22 UTC

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New Pass Manager: PreservedAnalyses and Analysis Cache Invalidation

Analysis Result Persistence in the New Pass Manager The LLVM New Pass Manager (NPM) utilizes a caching mechanism for analysis results to optimize the pipeline. To maintain correctness, passes must explicitly specify which analyses remain valid after an IR transformation by returning a PreservedAnalyses object. When a pass modifies the IR but fails to correct

llvm ir-optimization compiler-infrastructureDev Finch0 rep · 07 Nov 2023, 11:25 UTC