diff options
Diffstat (limited to 'lib/compiler/src/beam_ssa_dead.erl')
| -rw-r--r-- | lib/compiler/src/beam_ssa_dead.erl | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/compiler/src/beam_ssa_dead.erl b/lib/compiler/src/beam_ssa_dead.erl index e220a89ded..64b9b3e222 100644 --- a/lib/compiler/src/beam_ssa_dead.erl +++ b/lib/compiler/src/beam_ssa_dead.erl @@ -436,8 +436,22 @@ get_phi_arg([{Val,From}|_], From) -> Val; get_phi_arg([_|As], From) -> get_phi_arg(As, From). eval_terminator(#b_br{bool=#b_var{}=Bool}=Br, Bs, _St) -> - Val = get_value(Bool, Bs), - beam_ssa:normalize(Br#b_br{bool=Val}); + case get_value(Bool, Bs) of + #b_literal{val=Val}=Lit -> + case is_boolean(Val) of + true -> + beam_ssa:normalize(Br#b_br{bool=Lit}); + false -> + %% Non-boolean literal. This means that this `br` + %% terminator will never actually be reached with + %% these bindings. (There must be a previous two-way + %% branch that branches the other way when Bool + %% is bound to a non-boolean literal.) + none + end; + #b_var{}=Var -> + beam_ssa:normalize(Br#b_br{bool=Var}) + end; eval_terminator(#b_br{bool=#b_literal{}}=Br, _Bs, _St) -> beam_ssa:normalize(Br); eval_terminator(#b_switch{arg=Arg,fail=Fail,list=List}=Sw, Bs, St) -> |