llvm::pruneCache

Perform pruning using the supplied policy, returns true if pruning occurred, i.e. if Policy.Interval was expired.

Synopsis

Declared in <llvm/Support/CachePruning.h>

Expected<bool>
pruneCache(
    StringRef Path,
    CachePruningPolicy Policy,
    std::vector<std::unique_ptr<MemoryBuffer>> const& Files = {});

Description

On failure, it returns an Expected with the Error.

Check whether cache pruning happens using the supplied policy, adds a ThinLTO warning if cache_size_bytes or cache_size_files is too small for the current link job. The warning recommends the user to consider adjusting ‐‐thinlto‐cache‐policy.

As a safeguard against data loss if the user specifies the wrong directory as their cache directory, this function will ignore files not matching the pattern "llvmcache‐*".

Return Value

True if pruning occurred, or an Error on failure.

Parameters

Name

Description

Path

Cache directory to prune.

Policy

Pruning policy to apply.

Files

Optional buffers from the current job, used to warn when the job exceeds size or file‐count limits.

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