diff options
Diffstat (limited to 'lib/compiler/src/beam_utils.erl')
| -rw-r--r-- | lib/compiler/src/beam_utils.erl | 16 |
1 files changed, 1 insertions, 15 deletions
diff --git a/lib/compiler/src/beam_utils.erl b/lib/compiler/src/beam_utils.erl index 564a62a7f2..74e3d7e38a 100644 --- a/lib/compiler/src/beam_utils.erl +++ b/lib/compiler/src/beam_utils.erl @@ -22,7 +22,7 @@ -module(beam_utils). -export([is_killed_block/2,is_killed/3,is_killed_at/3, - is_not_used/3,is_not_used_at/3, + is_not_used/3, empty_label_index/0,index_label/3,index_labels/1, code_at/2,bif_to_test/3,is_pure_test/1, live_opt/1,delete_live_annos/1,combine_heap_needs/2, @@ -96,20 +96,6 @@ is_not_used(R, Is, D) -> {_,_} -> true end. -%% is_not_used(Register, [Instruction], State) -> true|false -%% Determine whether a register is never used in the instruction sequence -%% (it could still be referenced by an allocate instruction, meaning that -%% it MUST be initialized, but that its value does not matter). -%% The state is used to allow us to determine the usage state -%% across branches. - -is_not_used_at(R, Lbl, D) -> - St = #live{lbl=D,res=gb_trees:empty()}, - case check_liveness_at(R, Lbl, St) of - {used,_} -> false; - {_,_} -> true - end. - %% index_labels(FunctionIs) -> State %% Index the instruction sequence so that we can quickly %% look up the instruction following a specific label. |