Don't dump floated bindings just outside a lambda

[ghc-hetmet.git] / compiler / simplCore / SimplUtils.lhs

diff --git a/compiler/simplCore/SimplUtils.lhs b/compiler/simplCore/SimplUtils.lhs
index 2dbabb8..6ab117f 100644 (file)
--- a/compiler/simplCore/SimplUtils.lhs
+++ b/compiler/simplCore/SimplUtils.lhs
@@ -19,7 +19,7 @@ module SimplUtils (
        mkBoringStop, mkLazyArgStop, mkRhsStop, contIsRhsOrArg,
        interestingCallContext, interestingArgContext,
 
-       interestingArg, isStrictBndr, mkArgInfo
+       interestingArg, mkArgInfo
     ) where
 
 #include "HsVersions.h"
@@ -216,6 +216,14 @@ interestingArg (Var v)              = hasSomeUnfolding (idUnfolding v)
 interestingArg (Type _)                 = False
 interestingArg (App fn (Type _)) = interestingArg fn
 interestingArg (Note _ a)       = interestingArg a
+
+-- Idea (from Sam B); I'm not sure if it's a good idea, so commented out for now
+-- interestingArg expr | isUnLiftedType (exprType expr)
+--        -- Unlifted args are only ever interesting if we know what they are
+--  =                  case expr of
+--                        Lit lit -> True
+--                        _       -> False
+
 interestingArg other            = True
        -- Consider     let x = 3 in f x
        -- The substitution will contain (x -> ContEx 3), and we want to