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[NKI-1282] Output shared_constants to hash of their content #606

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Merged
ppotapov-aws merged 1 commit into from
Feb 27, 2026
Merged

[NKI-1282] Output shared_constants to hash of their content #606

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18 changes: 7 additions & 11 deletions KLR/Compile.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -28,25 +28,21 @@ open Lean (FromJson ToJson)
open Core (LncKernel SharedConstantFile)
open Pass (CompileResult)

private partial def uniqueName (dst : String) (base : String) (suffix : Nat := 0) : IO String := do
let candidate := s!"{base}_{suffix}"
let fName := s!"{dst}/{candidate}.npy"
if ← FilePath.pathExists (FilePath.mk fName) then
uniqueName dst base (suffix + 1)
else
return candidate

private def sharedConstant
(outfolder : String)
(c : String × TensorLib.Tensor)
: IO SharedConstantFile := do
let (name, tensor) := c
let dst := s!"{outfolder}/shared_constants"
IO.FS.createDirAll dst
let uName ← uniqueName dst name
let fName := s!"{dst}/{uName}.npy"

let data := tensor.toNpy
data.save! (System.FilePath.mk fName)
let hashInput := s!"{data.header.descr.toNpyString}:{data.header.shape.val}".toUTF8 ++ data.data
let hash := Util.SHA256.byteArrayToHashString (Util.SHA256.hash hashInput)
let (_, tmpPath) ← IO.FS.createTempFile
data.save! tmpPath
let fName := s!"{dst}/{hash}.npy"
IO.FS.rename tmpPath.toString fName
return ⟨name, fName⟩

structure DebugInfo where
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