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| author | Sylvain Henry <sylvain@haskus.fr> | 2021-01-15 12:33:40 +0100 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-01-23 15:31:20 -0500 |
| commit | 773e2828fde4d8f640082b6bded9945e7b9584e3 (patch) | |
| tree | 735cc36bc1ce14820890f8734e68280521a6e2ce /compiler/GHC/Core/Make.hs | |
| parent | 97208613414106e493a586d295ca05393e136ba4 (diff) | |
| download | haskell-773e2828fde4d8f640082b6bded9945e7b9584e3.tar.gz | |
Bignum: add Natural constant folding rules (#15821)
* Implement constant folding rules for Natural (similar to Integer ones)
* Add mkCoreUbxSum helper in GHC.Core.Make
* Remove naturalTo/FromInt
We now only provide `naturalTo/FromWord` as
the semantics is clear (truncate/zero-extend). For Int we have to deal
with negative numbers (throw an exception? convert to Word
beforehand?) so we leave the decision about what to do to the caller.
Moreover, now that we have sized types (Int8#, Int16#, ..., Word8#,
etc.) there is no reason to bless `Int#` more than `Int8#` or `Word8#`
(for example).
* Replaced a few `()` with `(# #)`
Diffstat (limited to 'compiler/GHC/Core/Make.hs')
| -rw-r--r-- | compiler/GHC/Core/Make.hs | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/compiler/GHC/Core/Make.hs b/compiler/GHC/Core/Make.hs index cc67143fba..b2dc4f4555 100644 --- a/compiler/GHC/Core/Make.hs +++ b/compiler/GHC/Core/Make.hs @@ -23,7 +23,7 @@ module GHC.Core.Make ( FloatBind(..), wrapFloat, wrapFloats, floatBindings, -- * Constructing small tuples - mkCoreVarTupTy, mkCoreTup, mkCoreUbxTup, + mkCoreVarTupTy, mkCoreTup, mkCoreUbxTup, mkCoreUbxSum, mkCoreTupBoxity, unitExpr, -- * Constructing big tuples @@ -402,6 +402,18 @@ mkCoreTupBoxity :: Boxity -> [CoreExpr] -> CoreExpr mkCoreTupBoxity Boxed exps = mkCoreTup1 exps mkCoreTupBoxity Unboxed exps = mkCoreUbxTup (map exprType exps) exps +-- | Build an unboxed sum. +-- +-- Alternative number ("alt") starts from 1. +mkCoreUbxSum :: Int -> Int -> [Type] -> CoreExpr -> CoreExpr +mkCoreUbxSum arity alt tys exp + = ASSERT( length tys == arity ) + ASSERT( alt <= arity ) + mkCoreConApps (sumDataCon alt arity) + (map (Type . getRuntimeRep) tys + ++ map Type tys + ++ [exp]) + -- | Build a big tuple holding the specified variables -- One-tuples are flattened; see Note [Flattening one-tuples] mkBigCoreVarTup :: [Id] -> CoreExpr |