diff options
Diffstat (limited to 'compiler/coreSyn/CoreTidy.hs')
| -rw-r--r-- | compiler/coreSyn/CoreTidy.hs | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler/coreSyn/CoreTidy.hs b/compiler/coreSyn/CoreTidy.hs index aed4e214ad..782e11a42a 100644 --- a/compiler/coreSyn/CoreTidy.hs +++ b/compiler/coreSyn/CoreTidy.hs @@ -18,6 +18,7 @@ import CoreSyn import CoreArity import Id import IdInfo +import Demand ( zapUsageEnvSig ) import Type( tidyType, tidyTyCoVarBndr ) import Coercion( tidyCo ) import Var @@ -187,6 +188,8 @@ tidyLetBndr rec_tidy_env env@(tidy_env, var_env) (id,rhs) -- -- Similarly for the demand info - on a let binder, this tells -- CorePrep to turn the let into a case. + -- But: Remove the usage demand here + -- (See Note [Zapping DmdEnv after Demand Analyzer] in WorkWrap) -- -- Similarly arity info for eta expansion in CorePrep -- @@ -196,7 +199,7 @@ tidyLetBndr rec_tidy_env env@(tidy_env, var_env) (id,rhs) new_info = vanillaIdInfo `setOccInfo` occInfo old_info `setArityInfo` exprArity rhs - `setStrictnessInfo` strictnessInfo old_info + `setStrictnessInfo` zapUsageEnvSig (strictnessInfo old_info) `setDemandInfo` demandInfo old_info `setInlinePragInfo` inlinePragInfo old_info `setUnfoldingInfo` new_unf |