diff options
Diffstat (limited to 'lib/compiler')
| -rw-r--r-- | lib/compiler/src/beam_validator.erl | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/compiler/src/beam_validator.erl b/lib/compiler/src/beam_validator.erl index 9fa55c5b4c..8d699f2abd 100644 --- a/lib/compiler/src/beam_validator.erl +++ b/lib/compiler/src/beam_validator.erl @@ -598,6 +598,14 @@ valfun_4({bif,is_map_key,{f,Fail},[_Key,Map]=Src,Dst}, Vst0) -> Vst = set_type(map, Map, Vst1), Type = propagate_fragility(bool, Src, Vst), set_type_reg(Type, Dst, Vst); +valfun_4({bif,Op,{f,Fail},[Cons]=Src,Dst}, Vst0) + when Op =:= hd; Op =:= tl -> + validate_src(Src, Vst0), + Vst1 = branch_state(Fail, Vst0), + Vst = set_type(cons, Cons, Vst1), + Type0 = bif_type(Op, Src, Vst), + Type = propagate_fragility(Type0, Src, Vst), + set_type_reg(Type, Dst, Vst); valfun_4({bif,Op,{f,Fail},Src,Dst}, Vst0) -> validate_src(Src, Vst0), Vst = branch_state(Fail, Vst0), @@ -610,7 +618,13 @@ valfun_4({gc_bif,Op,{f,Fail},Live,Src,Dst}, #vst{current=St0}=Vst0) -> St = kill_heap_allocation(St0), Vst1 = Vst0#vst{current=St}, Vst2 = branch_state(Fail, Vst1), - Vst = prune_x_regs(Live, Vst2), + Vst3 = prune_x_regs(Live, Vst2), + Vst = case Op of + map_size -> + set_type(map, hd(Src), Vst3); + _ -> + Vst3 + end, validate_src(Src, Vst), Type0 = bif_type(Op, Src, Vst), Type = propagate_fragility(Type0, Src, Vst), |