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Diffstat (limited to 'compiler/prelude/PrelRules.lhs')
| -rw-r--r-- | compiler/prelude/PrelRules.lhs | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/compiler/prelude/PrelRules.lhs b/compiler/prelude/PrelRules.lhs index 6faecaaef9..96e39fe641 100644 --- a/compiler/prelude/PrelRules.lhs +++ b/compiler/prelude/PrelRules.lhs @@ -672,12 +672,12 @@ strengthReduction two_lit add_op = do -- Note [Strength reduction] return arg ] return $ Var (mkPrimOpId add_op) `App` arg `App` arg -{- Note [Strength reduction] - -This rule turns multiplications of the form 2 * x and x * 2 into x + x addition -because addition costs less than multiplication. See #7116 - --} +-- Note [Strength reduction] +-- ~~~~~~~~~~~~~~~~~~~~~~~~~ +-- +-- This rule turns floating point multiplications of the form 2.0 * x and +-- x * 2.0 into x + x addition, because addition costs less than multiplication. +-- See #7116 trueVal, falseVal :: Expr CoreBndr trueVal = Var trueDataConId |