[Git][ghc/ghc][wip/mpickering-hannes] Eliminate name thunk in declaration fingerprinting

[Hannes Siebenhandl (@fendor)]

Hannes Siebenhandl pushed to branch wip/mpickering-hannes at Glasgow Haskell Compiler / GHC


Commits:
42ce32c8 by Fendor at 2024-03-27T15:55:24+01:00
Eliminate name thunk in declaration fingerprinting

Thunk analysis showed that we have about 100_000 thunks (in agda and
`-fwrite-simplified-core`) pointing to the name of the name decl.
Forcing this thunk fixes this issue.

- - - - -


1 changed file:

- compiler/GHC/IfaceToCore.hs


Changes:

=====================================
compiler/GHC/IfaceToCore.hs
=====================================
@@ -957,7 +957,7 @@ tc_iface_decl_fingerprint :: Bool                    -- Don't load pragmas into
 tc_iface_decl_fingerprint ignore_prags (_version, decl)
   = do  {       -- Populate the name cache with final versions of all
                 -- the names associated with the decl
-          let main_name = ifName decl
+          let !main_name = ifName decl
 
         -- Typecheck the thing, lazily
         -- NB. Firstly, the laziness is there in case we never need the



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/42ce32c800b6c22c150cde35e7db66da61fa0085

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/42ce32c800b6c22c150cde35e7db66da61fa0085
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