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authorBjörn Gustavsson <[email protected]>2013-12-03 12:42:06 +0100
committerBjörn Gustavsson <[email protected]>2014-01-20 12:22:41 +0100
commitaf0c7c0274b843551aa5ac393646d6e59ed89fb2 (patch)
tree9b8bc7c367a2d6c120cce0447110c000f48c4af7 /lib
parentc8266f4dcbafe0afdf291cb562605e968f778f14 (diff)
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Improve optimization of alignment for encoding
Diffstat (limited to 'lib')
-rw-r--r--lib/asn1/src/asn1ct_imm.erl13
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index 7b352c7872..a7b2e8a23b 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -1143,8 +1143,15 @@ per_enc_length(Bin, Unit, Len, {Lb,Ub}, Aligned, Type)
U = unit(Unit, Aligned, Type, Lb*Unit, Ub*Unit),
PutBits = [{put_bits,Bin,binary,U}],
build_length_cond(Prefix, [[Check|PutLen++PutBits]]);
-per_enc_length(Bin, Unit, Len, Sv, Aligned, Type) when is_integer(Sv) ->
- NumBits = Sv*Unit,
+per_enc_length(Bin, Unit0, Len, Sv, Aligned, Type) when is_integer(Sv) ->
+ NumBits = Sv*Unit0,
+ Unit = case NumBits rem 8 of
+ 0 ->
+ %% Help out the alignment optimizer.
+ 8;
+ _ ->
+ Unit0
+ end,
U = unit(Unit, Aligned, Type, NumBits, NumBits),
Pb = {put_bits,Bin,binary,U},
[{'cond',[[{eq,Len,Sv},Pb]]}].
@@ -2044,6 +2051,8 @@ enc_opt_al({put_bits,_,binary,[U]}=PutBits, Al) when U rem 8 =:= 0 ->
{[PutBits],Al};
enc_opt_al({sub,_,_,_}=Imm, Al) ->
{[Imm],Al};
+enc_opt_al({'try',_,_,_,_}=Imm, Al) ->
+ {[Imm],Al};
enc_opt_al(Imm, _) ->
{[Imm],unknown}.