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Don't try unfused reporting in silent mode. #60

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Don't try unfused reporting in silent mode. #60

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4b6e9ee
Add a nix flake file
harendra-kumar Dec 2, 2025
6949022
Shortcut fusion report in SilentMode
harendra-kumar Dec 4, 2025
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88 changes: 88 additions & 0 deletions flake.lock
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17 changes: 17 additions & 0 deletions flake.nix
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
{
description = "fusion-plugin";

inputs = {
basepkgs.url = "git+ssh://[email protected]/composewell/streamly-packages?rev=5c3c31fa35f9f75a52e2fd68f7d1d47f7622ce33";
nixpkgs.follows = "basepkgs/nixpkgs";
nixpkgs-darwin.follows = "basepkgs/nixpkgs-darwin";
};

outputs = { self, nixpkgs, nixpkgs-darwin, basepkgs }:
basepkgs.nixpack.mkOutputs {
inherit nixpkgs nixpkgs-darwin basepkgs;
name = "fusion-plugin";
sources = basepkgs.nixpack.lib.localSource "fusion-plugin" ./.;
packages = basepkgs.nixpack.lib.devPackage "fusion-plugin";
};
}
25 changes: 15 additions & 10 deletions src/Fusion/Plugin.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -424,10 +424,10 @@ letBndrsThatAreCases dflags anns bind = goLet [] bind
-- annotated with "Fuse" and traverse the Alt expressions to discover more
-- let bindings.
go parents True (Case _ _ _ alts) =
let binders = alts >>= (\(ALT_CONSTR(_,_,expr1)) -> go parents False expr1)
let result = alts >>= (\(ALT_CONSTR(_,_,expr1)) -> go parents False expr1)
in case needInlineCaseAlt dflags parents anns alts of
Just x -> (parents, x) : binders
Nothing -> binders
Just x -> (parents, x) : result
Nothing -> result

-- Only traverse the Alt expressions of the case to discover new let
-- bindings. Do not match for annotated constructors in the Alts.
Expand Down Expand Up @@ -755,13 +755,18 @@ fusionSimplify _hsc_env dflags =

fusionReport :: String -> ReportMode -> ModGuts -> CoreM ModGuts
fusionReport mesg reportMode guts = do
putMsgS $ "fusion-plugin: " ++ mesg ++ "..."
dflags <- getDynFlags
anns <- FMAP_SND getAnnotations deserializeWithData guts
when (anyUFM (any (== Fuse)) anns) $
mapM_ (transformBind dflags anns) $ mg_binds guts
return guts
where
case reportMode of
ReportSilent -> return guts
_ -> do
putMsgS $ "fusion-plugin: " ++ mesg ++ "..."
dflags <- getDynFlags
anns <- FMAP_SND getAnnotations deserializeWithData guts
when (anyUFM (any (== Fuse)) anns) $
mapM_ (transformBind dflags anns) $ mg_binds guts
return guts

where

transformBind :: DynFlags -> UNIQ_FM -> CoreBind -> CoreM ()
transformBind dflags anns bind@(NonRec b _) = do
let results = containsAnns dflags anns bind
Expand Down
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