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| author | M Farkas-Dyck <strake888@proton.me> | 2022-09-18 20:23:23 -0800 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2022-11-08 12:53:55 -0500 |
| commit | 68f49874aa217c2222c80c596ef11ffd992b459a (patch) | |
| tree | 215cafabd967e33b9d1c70182474d3690d1767fa /compiler/GHC/Core/Coercion | |
| parent | 5fe11fe612e1881bd4d1b9d5950d0d801e08e159 (diff) | |
| download | haskell-68f49874aa217c2222c80c596ef11ffd992b459a.tar.gz | |
Define `Infinite` list and use where appropriate.
Also add perf test for infinite list fusion.
In particular, in `GHC.Core`, often we deal with infinite lists of roles. Also in a few locations we deal with infinite lists of names.
Thanks to simonpj for helping to write the Note [Fusion for `Infinite` lists].
Diffstat (limited to 'compiler/GHC/Core/Coercion')
| -rw-r--r-- | compiler/GHC/Core/Coercion/Opt.hs | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/compiler/GHC/Core/Coercion/Opt.hs b/compiler/GHC/Core/Coercion/Opt.hs index 6fa8fc1273..d061d795a7 100644 --- a/compiler/GHC/Core/Coercion/Opt.hs +++ b/compiler/GHC/Core/Coercion/Opt.hs @@ -245,7 +245,7 @@ opt_co4 env sym rep r g@(TyConAppCo _r tc cos) (True, Nominal) -> mkTyConAppCo Representational tc (zipWith3 (opt_co3 env sym) - (map Just (tyConRolesRepresentational tc)) + (map Just (tyConRoleListRepresentational tc)) (repeat Nominal) cos) (False, Nominal) -> @@ -254,7 +254,7 @@ opt_co4 env sym rep r g@(TyConAppCo _r tc cos) -- must use opt_co2 here, because some roles may be P -- See Note [Optimising coercion optimisation] mkTyConAppCo r tc (zipWith (opt_co2 env sym) - (tyConRolesRepresentational tc) -- the current roles + (tyConRoleListRepresentational tc) -- the current roles cos) (_, Phantom) -> pprPanic "opt_co4 sees a phantom!" (ppr g) @@ -546,7 +546,7 @@ opt_univ env sym prov role oty1 oty2 , equalLength tys1 tys2 -- see Note [Differing kinds] -- NB: prov must not be the two interesting ones (ProofIrrel & Phantom); -- Phantom is already taken care of, and ProofIrrel doesn't relate tyconapps - = let roles = tyConRolesX role tc1 + = let roles = tyConRoleListX role tc1 arg_cos = zipWith3 (mkUnivCo prov') roles tys1 tys2 arg_cos' = zipWith (opt_co4 env sym False) roles arg_cos in |