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authorKostis Sagonas <[email protected]>2016-11-03 17:16:01 +0100
committerKostis Sagonas <[email protected]>2016-11-03 17:16:01 +0100
commit1257cee4faf33cc69c9452ba54afe5d5dbd4ddf6 (patch)
treea367455fa28bf1b548debd8de49b1a3caa282fe4 /lib/hipe
parent0e8268be503ea53c100fef03d498ad7cc642c11b (diff)
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Fix the native code translation of bs_match_string
This fixes a HiPE bug reported on erlang-questions on 2/11/2016. The BEAM to ICode tranaslation of the bs_match_string instruction, written long ago for binaries (i.e., with byte-sized strings), tried to do a `clever' translation of even bit-sized strings using a HiPE primop that took a `Size' argument expressed in *bytes*. ICode is not really the place to do such a thing, and moreover there is really no reason for the HiPE primop not to take a Size argument expressed in *bits* instead. This commit changes the `Size' argument to be in bits, postpones the translation of the bs_match_string primop Fixed in a pair-programming/debugging session with @margnus1. until RTL and does a proper translation using bit-sized quantities there.
Diffstat (limited to 'lib/hipe')
-rw-r--r--lib/hipe/icode/hipe_beam_to_icode.erl28
-rw-r--r--lib/hipe/icode/hipe_icode_primops.erl8
-rw-r--r--lib/hipe/rtl/hipe_rtl_binary.erl2
-rw-r--r--lib/hipe/rtl/hipe_rtl_binary_match.erl37
4 files changed, 26 insertions, 49 deletions
diff --git a/lib/hipe/icode/hipe_beam_to_icode.erl b/lib/hipe/icode/hipe_beam_to_icode.erl
index 224aacd8d7..3386523206 100644
--- a/lib/hipe/icode/hipe_beam_to_icode.erl
+++ b/lib/hipe/icode/hipe_beam_to_icode.erl
@@ -763,32 +763,10 @@ trans_fun([{test,bs_test_unit,{f,Lbl},[Ms,Unit]}|
[MsVar], [], Env, Instructions);
trans_fun([{test,bs_match_string,{f,Lbl},[Ms,BitSize,Bin]}|
Instructions], Env) ->
- True = mk_label(new),
- FalseLabName = map_label(Lbl),
- TrueLabName = hipe_icode:label_name(True),
+ %% the current match buffer
MsVar = mk_var(Ms),
- TmpVar = mk_var(new),
- ByteSize = BitSize div 8,
- ExtraBits = BitSize rem 8,
- WordSize = hipe_rtl_arch:word_size(),
- if ExtraBits =:= 0 ->
- trans_op_call({hipe_bs_primop,{bs_match_string,Bin,ByteSize}}, Lbl,
- [MsVar], [MsVar], Env, Instructions);
- BitSize =< ((WordSize * 8) - 5) ->
- <<Int:BitSize, _/bits>> = Bin,
- {I1,Env1} = trans_one_op_call({hipe_bs_primop,{bs_get_integer,BitSize,0}}, Lbl,
- [MsVar], [TmpVar, MsVar], Env),
- I2 = hipe_icode:mk_type([TmpVar], {integer,Int}, TrueLabName, FalseLabName),
- I1 ++ [I2,True] ++ trans_fun(Instructions, Env1);
- true ->
- <<RealBin:ByteSize/binary, Int:ExtraBits, _/bits>> = Bin,
- {I1,Env1} = trans_one_op_call({hipe_bs_primop,{bs_match_string,RealBin,ByteSize}}, Lbl,
- [MsVar], [MsVar], Env),
- {I2,Env2} = trans_one_op_call({hipe_bs_primop,{bs_get_integer,ExtraBits,0}}, Lbl,
- [MsVar], [TmpVar, MsVar], Env1),
- I3 = hipe_icode:mk_type([TmpVar], {integer,Int}, TrueLabName, FalseLabName),
- I1 ++ I2 ++ [I3,True] ++ trans_fun(Instructions, Env2)
- end;
+ Primop = {hipe_bs_primop, {bs_match_string, Bin, BitSize}},
+ trans_op_call(Primop, Lbl, [MsVar], [MsVar], Env, Instructions);
trans_fun([{bs_context_to_binary,Var}|Instructions], Env) ->
%% the current match buffer
IVars = [trans_arg(Var)],
diff --git a/lib/hipe/icode/hipe_icode_primops.erl b/lib/hipe/icode/hipe_icode_primops.erl
index cee37b6a57..2a141c514e 100644
--- a/lib/hipe/icode/hipe_icode_primops.erl
+++ b/lib/hipe/icode/hipe_icode_primops.erl
@@ -287,8 +287,8 @@ pp(Dev, Op) ->
io:format(Dev, "bs_start_match<~w>", [Max]);
{{bs_start_match, Type}, Max} ->
io:format(Dev, "bs_start_match<~w,~w>", [Type,Max]);
- {bs_match_string, String, SizeInBytes} ->
- io:format(Dev, "bs_match_string<~w, ~w>", [String, SizeInBytes]);
+ {bs_match_string, String, SizeInBits} ->
+ io:format(Dev, "bs_match_string<~w, ~w>", [String, SizeInBits]);
{bs_get_integer, Size, Flags} ->
io:format(Dev, "bs_get_integer<~w, ~w>", [Size, Flags]);
{bs_get_float, Size, Flags} ->
@@ -596,10 +596,10 @@ type(Primop, Args) ->
erl_types:t_subtract(Type, erl_types:t_matchstate()),
erl_types:t_matchstate_slot(
erl_types:t_inf(Type, erl_types:t_matchstate()), 0));
- {hipe_bs_primop, {bs_match_string,_,Bytes}} ->
+ {hipe_bs_primop, {bs_match_string,_,Bits}} ->
[MatchState] = Args,
BinType = erl_types:t_matchstate_present(MatchState),
- NewBinType = match_bin(erl_types:t_bitstr(0, Bytes*8), BinType),
+ NewBinType = match_bin(erl_types:t_bitstr(0, Bits), BinType),
erl_types:t_matchstate_update_present(NewBinType, MatchState);
{hipe_bs_primop, {bs_test_unit,Unit}} ->
[MatchState] = Args,
diff --git a/lib/hipe/rtl/hipe_rtl_binary.erl b/lib/hipe/rtl/hipe_rtl_binary.erl
index fb9c0c196d..9b400f4c93 100644
--- a/lib/hipe/rtl/hipe_rtl_binary.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary.erl
@@ -19,7 +19,7 @@
%%% %CopyrightEnd%
%%%
%%%-------------------------------------------------------------------
-%%% File : hipe_rtl_binary_2.erl
+%%% File : hipe_rtl_binary.erl
%%% Author : Per Gustafsson <[email protected]>
%%% Description :
%%%
diff --git a/lib/hipe/rtl/hipe_rtl_binary_match.erl b/lib/hipe/rtl/hipe_rtl_binary_match.erl
index 528672b893..d999cd2743 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_match.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_match.erl
@@ -270,24 +270,23 @@ gen_rtl({bs_save, Slot}, [NewMs], [Ms], TrueLblName, _FalseLblName) ->
set_field_from_term({matchstate, {saveoffset, Slot}}, Ms, Offset),
hipe_rtl:mk_goto(TrueLblName)];
%% ----- bs_match_string -----
-gen_rtl({bs_match_string, String, ByteSize}, Dst, [Ms],
+gen_rtl({bs_match_string, String, BitSize}, Dst, [Ms],
TrueLblName, FalseLblName) ->
{[Offset, BinSize, Base], Instrs} =
extract_matchstate_vars([offset, binsize, base], Ms),
[SuccessLbl, ALbl, ULbl] = create_lbls(3),
[NewOffset, BitOffset] = create_gcsafe_regs(2),
- Unit = hipe_rtl_arch:word_size() - 1,
- Loops = ByteSize div Unit,
- Init =
+ Unit = (hipe_rtl_arch:word_size() - 1) * ?BYTE_SIZE,
+ Init =
[Instrs,
opt_update_ms(Dst, Ms),
- check_size(Offset, hipe_rtl:mk_imm(ByteSize*?BYTE_SIZE), BinSize,
+ check_size(Offset, hipe_rtl:mk_imm(BitSize), BinSize,
NewOffset, hipe_rtl:label_name(SuccessLbl), FalseLblName),
SuccessLbl],
SplitCode =
[hipe_rtl:mk_alub(BitOffset, Offset, 'and', hipe_rtl:mk_imm(?LOW_BITS), eq,
hipe_rtl:label_name(ALbl), hipe_rtl:label_name(ULbl))],
- Loops = ByteSize div Unit,
+ Loops = BitSize div Unit,
SkipSize = Loops * Unit,
{ACode1, UCode1} =
case Loops of
@@ -297,9 +296,9 @@ gen_rtl({bs_match_string, String, ByteSize}, Dst, [Ms],
create_loops(Loops, Unit, String, Base,
Offset, BitOffset, FalseLblName)
end,
- <<_:SkipSize/binary, RestString/binary>> = String,
+ <<_:SkipSize/bits, RestString/bits>> = String,
{ACode2, UCode2} =
- case ByteSize rem Unit of
+ case BitSize rem Unit of
0 ->
{[], []};
Rem ->
@@ -393,12 +392,12 @@ validate_unicode_retract_c_code(Src, Ms, TrueLblName, FalseLblName) ->
create_loops(Loops, Unit, String, Base, Offset, BitOffset, FalseLblName) ->
[Reg] = create_gcsafe_regs(1),
AlignedFun = fun(Value) ->
- [get_int_to_reg(Reg, Unit*?BYTE_SIZE, Base, Offset, 'srl',
+ [get_int_to_reg(Reg, Unit, Base, Offset, 'srl',
{unsigned, big}),
update_and_test(Reg, Unit, Offset, Value, FalseLblName)]
end,
UnAlignedFun = fun(Value) ->
- [get_unaligned_int_to_reg(Reg, Unit*?BYTE_SIZE,
+ [get_unaligned_int_to_reg(Reg, Unit,
Base, Offset, BitOffset,
'srl', {unsigned, big})|
update_and_test(Reg, Unit, Offset, Value, FalseLblName)]
@@ -406,31 +405,31 @@ create_loops(Loops, Unit, String, Base, Offset, BitOffset, FalseLblName) ->
{create_loops(Loops, Unit, String, AlignedFun),
create_loops(Loops, Unit, String, UnAlignedFun)}.
-create_rests(Rem, String, Base, Offset, BitOffset, FalseLblName) ->
+create_rests(RemBits, String, Base, Offset, BitOffset, FalseLblName) ->
[Reg] = create_gcsafe_regs(1),
AlignedFun = fun(Value) ->
- [get_int_to_reg(Reg, Rem*?BYTE_SIZE, Base, Offset, 'srl',
+ [get_int_to_reg(Reg, RemBits, Base, Offset, 'srl',
{unsigned, big})|
just_test(Reg, Value, FalseLblName)]
end,
UnAlignedFun = fun(Value) ->
- [get_unaligned_int_to_reg(Reg, Rem*?BYTE_SIZE,
+ [get_unaligned_int_to_reg(Reg, RemBits,
Base, Offset, BitOffset,
'srl', {unsigned, big})|
just_test(Reg, Value, FalseLblName)]
end,
- {create_loops(1, Rem, String, AlignedFun),
- create_loops(1, Rem, String, UnAlignedFun)}.
+ {create_loops(1, RemBits, String, AlignedFun),
+ create_loops(1, RemBits, String, UnAlignedFun)}.
create_loops(0, _Unit, _String, _IntFun) ->
[];
create_loops(N, Unit, String, IntFun) ->
- {Value, RestString} = get_value(Unit,String),
+ {Value, RestString} = get_value(Unit, String),
[IntFun(Value),
create_loops(N-1, Unit, RestString, IntFun)].
update_and_test(Reg, Unit, Offset, Value, FalseLblName) ->
- [add_to_offset(Offset, Offset, hipe_rtl:mk_imm(Unit*?BYTE_SIZE), FalseLblName),
+ [add_to_offset(Offset, Offset, hipe_rtl:mk_imm(Unit), FalseLblName),
just_test(Reg, Value, FalseLblName)].
just_test(Reg, Value, FalseLblName) ->
@@ -439,8 +438,8 @@ just_test(Reg, Value, FalseLblName) ->
hipe_rtl:label_name(ContLbl), FalseLblName),
ContLbl].
-get_value(N,String) ->
- <<I:N/integer-unit:8, Rest/binary>> = String,
+get_value(N, String) ->
+ <<I:N, Rest/bits>> = String,
{I, Rest}.
make_int_gc_code(I) when is_integer(I) ->