%% -*- erlang-indent-level: 2 -*-
-module(hipe_rtl_to_llvm).
-author("Chris Stavrakakis, Yiannis Tsiouris").
-export([translate/2]). % the main function of this module
-export([fix_mfa_name/1]). % a help function used in hipe_llvm_main
-include("../rtl/hipe_rtl.hrl").
-include("../rtl/hipe_literals.hrl").
-include("hipe_llvm_arch.hrl").
-define(BITS_IN_WORD, (?bytes_to_bits(hipe_rtl_arch:word_size()))).
-define(BITS_IN_BYTE, (?bytes_to_bits(1))).
-define(BRANCH_META_TAKEN, "0").
-define(BRANCH_META_NOT_TAKEN, "1").
-define(FIRST_FREE_META_NO, 2).
-define(HIPE_LITERALS_META, "hipe.literals").
%%------------------------------------------------------------------------------
%% @doc Main function for translating an RTL function to LLVM Assembly. Takes as
%% input the RTL code and the variable indexes of possible garbage
%% collection roots and returns the corresponing LLVM, a dictionary with
%% all the relocations in the code and a hipe_consttab() with informaton
%% about data.
%%------------------------------------------------------------------------------
translate(RTL, Roots) ->
Fun = hipe_rtl:rtl_fun(RTL),
Params = hipe_rtl:rtl_params(RTL),
Data = hipe_rtl:rtl_data(RTL),
Code = hipe_rtl:rtl_code(RTL),
%% Init unique symbol generator and initialize the label counter to the last
%% RTL label.
hipe_gensym:init(llvm),
{_, MaxLabel} = hipe_rtl:rtl_label_range(RTL),
put({llvm,label_count}, MaxLabel + 1),
%% Put first label of RTL code in process dictionary
find_code_entry_label(Code),
%% Initialize relocations symbol dictionary
Relocs = dict:new(),
%% Print RTL to file
%% {ok, File_rtl} = file:open("rtl_" ++integer_to_list(random:uniform(2000))
%% ++ ".rtl", [write]),
%% hipe_rtl:pp(File_rtl, RTL),
%% file:close(File_rtl),
%% Pass on RTL code to handle exception handling and identify labels of Fail
%% Blocks
{Code1, FailLabels} = fix_code(Code),
%% Allocate stack slots for each virtual register and declare gc roots
AllocaStackCode = alloca_stack(Code1, Params, Roots),
%% Translate Code
{LLVM_Code1, Relocs1, NewData} =
translate_instr_list(Code1, [], Relocs, Data),
%% Create LLVM code to declare relocation symbols as external symbols along
%% with local variables in order to use them as just any other variable
{FinalRelocs, ExternalDecl0, LocalVars} =
handle_relocations(Relocs1, Data, Fun),
ExternalDecl = add_literals_metadata(ExternalDecl0),
%% Pass on LLVM code in order to create Fail blocks and a landingpad
%% instruction to each one
LLVM_Code2 = add_landingpads(LLVM_Code1, FailLabels),
%% Create LLVM Code for the compiled function
LLVM_Code3 = create_function_definition(Fun, Params, LLVM_Code2,
AllocaStackCode ++ LocalVars),
%% Final Code = CompiledFunction + External Declarations
FinalLLVMCode = [LLVM_Code3 | ExternalDecl],
{FinalLLVMCode, FinalRelocs, NewData}.
find_code_entry_label([]) ->
exit({?MODULE, find_code_entry_label, "Empty code"});
find_code_entry_label([I|_]) ->
case hipe_rtl:is_label(I) of
true ->
put(first_label, hipe_rtl:label_name(I));
false ->
exit({?MODULE, find_code_entry_label, "First instruction is not a label"})
end.
%% @doc Create a stack slot for each virtual register. The stack slots
%% that correspond to possible garbage collection roots must be
%% marked as such.
alloca_stack(Code, Params, Roots) ->
%% Find all assigned virtual registers
Destinations = collect_destinations(Code),
%% Declare virtual registers, and declare garbage collection roots
do_alloca_stack(Destinations++Params, Params, Roots).
collect_destinations(Code) ->
lists:usort(lists:flatmap(fun insn_dst/1, Code)).
do_alloca_stack(Destinations, Params, Roots) ->
do_alloca_stack(Destinations, Params, Roots, []).
do_alloca_stack([], _, _, Acc) ->
Acc;
do_alloca_stack([D|Ds], Params, Roots, Acc) ->
{Name, _I} = trans_dst(D),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
case hipe_rtl:is_var(D) of
true ->
Num = hipe_rtl:var_index(D),
I1 = hipe_llvm:mk_alloca(Name, WordTy, [], []),
case lists:member(Num, Roots) of
true -> %% Variable is a possible Root
T1 = mk_temp(),
BYTE_TYPE_PP = hipe_llvm:mk_pointer(ByteTyPtr),
I2 =
hipe_llvm:mk_conversion(T1, bitcast, WordTyPtr, Name, BYTE_TYPE_PP),
GcRootArgs = [{BYTE_TYPE_PP, T1}, {ByteTyPtr, "@gc_metadata"}],
I3 = hipe_llvm:mk_call([], false, [], [], hipe_llvm:mk_void(),
"@llvm.gcroot", GcRootArgs, []),
I4 = case lists:member(D, Params) of
false ->
hipe_llvm:mk_store(WordTy, "-5", WordTyPtr, Name,
[], [], false);
true -> []
end,
do_alloca_stack(Ds, Params, Roots, [I1, I2, I3, I4 | Acc]);
false ->
do_alloca_stack(Ds, Params, Roots, [I1|Acc])
end;
false ->
case hipe_rtl:is_reg(D) andalso isPrecoloured(D) of
true -> %% Precoloured registers are mapped to "special" stack slots
do_alloca_stack(Ds, Params, Roots, Acc);
false ->
I1 = case hipe_rtl:is_fpreg(D) of
true ->
FloatTy = hipe_llvm:mk_double(),
hipe_llvm:mk_alloca(Name, FloatTy, [], []);
false -> hipe_llvm:mk_alloca(Name, WordTy, [], [])
end,
do_alloca_stack(Ds, Params, Roots, [I1|Acc])
end
end.
%%------------------------------------------------------------------------------
%% @doc Translation of the linearized RTL Code. Each RTL instruction is
%% translated to a list of LLVM Assembly instructions. The relocation
%% dictionary is updated when needed.
%%------------------------------------------------------------------------------
translate_instr_list([], Acc, Relocs, Data) ->
{lists:reverse(lists:flatten(Acc)), Relocs, Data};
translate_instr_list([I | Is], Acc, Relocs, Data) ->
{Acc1, NewRelocs, NewData} = translate_instr(I, Relocs, Data),
translate_instr_list(Is, [Acc1 | Acc], NewRelocs, NewData).
translate_instr(I, Relocs, Data) ->
case I of
#alu{} ->
{I2, Relocs2} = trans_alu(I, Relocs),
{I2, Relocs2, Data};
#alub{} ->
{I2, Relocs2} = trans_alub(I, Relocs),
{I2, Relocs2, Data};
#branch{} ->
{I2, Relocs2} = trans_branch(I, Relocs),
{I2, Relocs2, Data};
#call{} ->
{I2, Relocs2} =
case hipe_rtl:call_fun(I) of
%% In AMD64 this instruction does nothing!
%% TODO: chech use of fwait in other architectures!
fwait ->
{[], Relocs};
_ ->
trans_call(I, Relocs)
end,
{I2, Relocs2, Data};
#comment{} ->
{I2, Relocs2} = trans_comment(I, Relocs),
{I2, Relocs2, Data};
#enter{} ->
{I2, Relocs2} = trans_enter(I, Relocs),
{I2, Relocs2, Data};
#fconv{} ->
{I2, Relocs2} = trans_fconv(I, Relocs),
{I2, Relocs2, Data};
#fload{} ->
{I2, Relocs2} = trans_fload(I, Relocs),
{I2, Relocs2, Data};
#fmove{} ->
{I2, Relocs2} = trans_fmove(I, Relocs),
{I2, Relocs2, Data};
#fp{} ->
{I2, Relocs2} = trans_fp(I, Relocs),
{I2, Relocs2, Data};
#fp_unop{} ->
{I2, Relocs2} = trans_fp_unop(I, Relocs),
{I2, Relocs2, Data};
#fstore{} ->
{I2, Relocs2} = trans_fstore(I, Relocs),
{I2, Relocs2, Data};
#goto{} ->
{I2, Relocs2} = trans_goto(I, Relocs),
{I2, Relocs2, Data};
#label{} ->
{I2, Relocs2} = trans_label(I, Relocs),
{I2, Relocs2, Data};
#load{} ->
{I2, Relocs2} = trans_load(I, Relocs),
{I2, Relocs2, Data};
#load_address{} ->
{I2, Relocs2} = trans_load_address(I, Relocs),
{I2, Relocs2, Data};
#load_atom{} ->
{I2, Relocs2} = trans_load_atom(I, Relocs),
{I2, Relocs2, Data};
#move{} ->
{I2, Relocs2} = trans_move(I, Relocs),
{I2, Relocs2, Data};
#return{} ->
{I2, Relocs2} = trans_return(I, Relocs),
{I2, Relocs2, Data};
#store{} ->
{I2, Relocs2} = trans_store(I, Relocs),
{I2, Relocs2, Data};
#switch{} -> %% Only switch instruction updates Data
{I2, Relocs2, NewData} = trans_switch(I, Relocs, Data),
{I2, Relocs2, NewData};
Other ->
exit({?MODULE, translate_instr, {"Unknown RTL instruction", Other}})
end.
%%
%% alu
%%
trans_alu(I, Relocs) ->
RtlDst = hipe_rtl:alu_dst(I),
TmpDst = mk_temp(),
{Src1, I1} = trans_src(hipe_rtl:alu_src1(I)),
{Src2, I2} = trans_src(hipe_rtl:alu_src2(I)),
Op = trans_op(hipe_rtl:alu_op(I)),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I3 = hipe_llvm:mk_operation(TmpDst, Op, WordTy, Src1, Src2, []),
I4 = store_stack_dst(TmpDst, RtlDst),
{[I4, I3, I2, I1], Relocs}.
%%
%% alub
%%
trans_alub(I, Relocs) ->
case hipe_rtl:alub_cond(I) of
Op when Op =:= overflow orelse Op =:= not_overflow ->
trans_alub_overflow(I, signed, Relocs);
ltu -> %% ltu means unsigned overflow
trans_alub_overflow(I, unsigned, Relocs);
_ ->
trans_alub_no_overflow(I, Relocs)
end.
trans_alub_overflow(I, Sign, Relocs) ->
{Src1, I1} = trans_src(hipe_rtl:alub_src1(I)),
{Src2, I2} = trans_src(hipe_rtl:alub_src2(I)),
RtlDst = hipe_rtl:alub_dst(I),
TmpDst = mk_temp(),
Name = trans_alub_op(I, Sign),
NewRelocs = relocs_store(Name, {call, remote, {llvm, Name, 2}}, Relocs),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
ReturnType = hipe_llvm:mk_struct([WordTy, hipe_llvm:mk_int(1)]),
T1 = mk_temp(),
I3 = hipe_llvm:mk_call(T1, false, [], [], ReturnType, "@" ++ Name,
[{WordTy, Src1}, {WordTy, Src2}], []),
%% T1{0}: result of the operation
I4 = hipe_llvm:mk_extractvalue(TmpDst, ReturnType, T1 , "0", []),
I5 = store_stack_dst(TmpDst, RtlDst),
T2 = mk_temp(),
%% T1{1}: Boolean variable indicating overflow
I6 = hipe_llvm:mk_extractvalue(T2, ReturnType, T1, "1", []),
{TrueLabel, FalseLabel, MetaData} =
case hipe_rtl:alub_cond(I) of
Op when Op =:= overflow orelse Op =:= ltu ->
{mk_jump_label(hipe_rtl:alub_true_label(I)),
mk_jump_label(hipe_rtl:alub_false_label(I)),
branch_metadata(hipe_rtl:alub_pred(I))};
not_overflow ->
{mk_jump_label(hipe_rtl:alub_false_label(I)),
mk_jump_label(hipe_rtl:alub_true_label(I)),
branch_metadata(1 - hipe_rtl:alub_pred(I))}
end,
I7 = hipe_llvm:mk_br_cond(T2, TrueLabel, FalseLabel, MetaData),
{[I7, I6, I5, I4, I3, I2, I1], NewRelocs}.
trans_alub_op(I, Sign) ->
Name =
case Sign of
signed ->
case hipe_rtl:alub_op(I) of
add -> "llvm.sadd.with.overflow.";
mul -> "llvm.smul.with.overflow.";
sub -> "llvm.ssub.with.overflow.";
Op -> exit({?MODULE, trans_alub_op, {"Unknown alub operator", Op}})
end;
unsigned ->
case hipe_rtl:alub_op(I) of
add -> "llvm.uadd.with.overflow.";
mul -> "llvm.umul.with.overflow.";
sub -> "llvm.usub.with.overflow.";
Op -> exit({?MODULE, trans_alub_op, {"Unknown alub operator", Op}})
end
end,
Type =
case hipe_rtl_arch:word_size() of
4 -> "i32";
8 -> "i64"
%% Other -> exit({?MODULE, trans_alub_op, {"Unknown type", Other}})
end,
Name ++ Type.
trans_alub_no_overflow(I, Relocs) ->
%% alu
T = hipe_rtl:mk_alu(hipe_rtl:alub_dst(I), hipe_rtl:alub_src1(I),
hipe_rtl:alub_op(I), hipe_rtl:alub_src2(I)),
%% A trans_alu instruction cannot change relocations
{I1, _} = trans_alu(T, Relocs),
%% icmp
%% Translate destination as src, to match with the semantics of instruction
{Dst, I2} = trans_src(hipe_rtl:alub_dst(I)),
Cond = trans_rel_op(hipe_rtl:alub_cond(I)),
T3 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I5 = hipe_llvm:mk_icmp(T3, Cond, WordTy, Dst, "0"),
%% br
Metadata = branch_metadata(hipe_rtl:alub_pred(I)),
True_label = mk_jump_label(hipe_rtl:alub_true_label(I)),
False_label = mk_jump_label(hipe_rtl:alub_false_label(I)),
I6 = hipe_llvm:mk_br_cond(T3, True_label, False_label, Metadata),
{[I6, I5, I2, I1], Relocs}.
%%
%% branch
%%
trans_branch(I, Relocs) ->
{Src1, I1} = trans_src(hipe_rtl:branch_src1(I)),
{Src2, I2} = trans_src(hipe_rtl:branch_src2(I)),
Cond = trans_rel_op(hipe_rtl:branch_cond(I)),
%% icmp
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I3 = hipe_llvm:mk_icmp(T1, Cond, WordTy, Src1, Src2),
%% br
True_label = mk_jump_label(hipe_rtl:branch_true_label(I)),
False_label = mk_jump_label(hipe_rtl:branch_false_label(I)),
Metadata = branch_metadata(hipe_rtl:branch_pred(I)),
I4 = hipe_llvm:mk_br_cond(T1, True_label, False_label, Metadata),
{[I4, I3, I2, I1], Relocs}.
branch_metadata(X) when X =:= 0.5 -> [];
branch_metadata(X) when X > 0.5 -> ?BRANCH_META_TAKEN;
branch_metadata(X) when X < 0.5 -> ?BRANCH_META_NOT_TAKEN.
%%
%% call
%%
trans_call(I, Relocs) ->
RtlCallArgList= hipe_rtl:call_arglist(I),
RtlCallName = hipe_rtl:call_fun(I),
{I0, Relocs1} = expose_closure(RtlCallName, RtlCallArgList, Relocs),
TmpDst = mk_temp(),
{CallArgs, I1} = trans_call_args(RtlCallArgList),
FixedRegs = fixed_registers(),
{LoadedFixedRegs, I2} = load_fixed_regs(FixedRegs),
FinalArgs = fix_reg_args(LoadedFixedRegs) ++ CallArgs,
{Name, I3, Relocs2} =
trans_call_name(RtlCallName, hipe_rtl:call_type(I), Relocs1, CallArgs, FinalArgs),
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
I4 =
case hipe_rtl:call_fail(I) of
%% Normal Call
[] ->
hipe_llvm:mk_call(T1, false, "cc 11", [], FunRetTy, Name, FinalArgs,
[]);
%% Call With Exception
FailLabelNum ->
TrueLabel = "L" ++ integer_to_list(hipe_rtl:call_normal(I)),
FailLabel = "%FL" ++ integer_to_list(FailLabelNum),
II1 =
hipe_llvm:mk_invoke(T1, "cc 11", [], FunRetTy, Name, FinalArgs, [],
"%" ++ TrueLabel, FailLabel),
II2 = hipe_llvm:mk_label(TrueLabel),
[II2, II1]
end,
I5 = store_fixed_regs(FixedRegs, T1),
I6 =
case hipe_rtl:call_dstlist(I) of
[] -> []; %% No return value
[Destination] ->
II3 =
hipe_llvm:mk_extractvalue(TmpDst, FunRetTy, T1,
integer_to_list(?NR_PINNED_REGS), []),
II4 = store_stack_dst(TmpDst, Destination),
[II4, II3]
end,
I7 =
case hipe_rtl:call_continuation(I) of
[] -> []; %% No continuation
CC ->
{II5, _} = trans_goto(hipe_rtl:mk_goto(CC), Relocs2),
II5
end,
{[I7, I6, I5, I4, I3, I2, I1, I0], Relocs2}.
%% In case of call to a register (closure call) with more than ?NR_ARG_REGS
%% arguments we must track the offset this call in the code, in order to
%% to correct the stack descriptor. So, we insert a new Label and add this label
%% to the "table_closures"
%% --------------------------------|--------------------------------------------
%% Old Code | New Code
%% --------------------------------|--------------------------------------------
%% | br %ClosureLabel
%% call %reg(Args) | ClosureLabel:
%% | call %reg(Args)
expose_closure(CallName, CallArgs, Relocs) ->
CallArgsNr = length(CallArgs),
case hipe_rtl:is_reg(CallName) andalso CallArgsNr > ?NR_ARG_REGS of
true ->
LabelNum = hipe_gensym:new_label(llvm),
ClosureLabel = hipe_llvm:mk_label(mk_label(LabelNum)),
JumpIns = hipe_llvm:mk_br(mk_jump_label(LabelNum)),
Relocs1 =
relocs_store({CallName, LabelNum},
{closure_label, LabelNum, CallArgsNr - ?NR_ARG_REGS},
Relocs),
{[ClosureLabel, JumpIns], Relocs1};
false ->
{[], Relocs}
end.
trans_call_name(RtlCallName, RtlCallType, Relocs, CallArgs, FinalArgs) ->
case RtlCallName of
PrimOp when is_atom(PrimOp) ->
LlvmName = trans_prim_op(PrimOp),
Relocs1 =
relocs_store(LlvmName, {call, not_remote, {bif, PrimOp, length(CallArgs)}}, Relocs),
{"@" ++ LlvmName, [], Relocs1};
{M, F, A} when is_atom(M), is_atom(F), is_integer(A) ->
LlvmName = trans_mfa_name({M, F, A}, RtlCallType),
Relocs1 =
relocs_store(LlvmName, {call, RtlCallType, {M, F, length(CallArgs)}}, Relocs),
{"@" ++ LlvmName, [], Relocs1};
Reg ->
case hipe_rtl:is_reg(Reg) of
true ->
%% In case of a closure call, the register holding the address
%% of the closure must be converted to function type in
%% order to make the call
TT1 = mk_temp(),
{RegName, II1} = trans_src(Reg),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
II2 =
hipe_llvm:mk_conversion(TT1, inttoptr, WordTy, RegName, WordTyPtr),
TT2 = mk_temp(),
ArgsTypeList = lists:duplicate(length(FinalArgs), WordTy),
FunRetTy =
hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
FunType = hipe_llvm:mk_fun(FunRetTy, ArgsTypeList),
FunTypeP = hipe_llvm:mk_pointer(FunType),
II3 = hipe_llvm:mk_conversion(TT2, bitcast, WordTyPtr, TT1, FunTypeP),
{TT2, [II3, II2, II1], Relocs};
false ->
exit({?MODULE, trans_call, {"Unimplemented call to", RtlCallName}})
end
end.
%%
trans_call_args(ArgList) ->
{Args, I} = lists:unzip(trans_args(ArgList)),
%% Reverse arguments that are passed to stack to match with the Erlang
%% calling convention. (Propably not needed in prim calls.)
ReversedArgs =
case erlang:length(Args) > ?NR_ARG_REGS of
false ->
Args;
true ->
{ArgsInRegs, ArgsInStack} = lists:split(?NR_ARG_REGS, Args),
ArgsInRegs ++ lists:reverse(ArgsInStack)
end,
%% Reverse I, because some of the arguments may go out of scope and
%% should be killed(store -5). When two or more arguments are they
%% same, then order matters!
{ReversedArgs, lists:reverse(I)}.
%%
%% trans_comment
%%
trans_comment(I, Relocs) ->
I1 = hipe_llvm:mk_comment(hipe_rtl:comment_text(I)),
{I1, Relocs}.
%%
%% enter
%%
trans_enter(I, Relocs) ->
{CallArgs, I0} = trans_call_args(hipe_rtl:enter_arglist(I)),
FixedRegs = fixed_registers(),
{LoadedFixedRegs, I1} = load_fixed_regs(FixedRegs),
FinalArgs = fix_reg_args(LoadedFixedRegs) ++ CallArgs,
{Name, I2, NewRelocs} =
trans_call_name(hipe_rtl:enter_fun(I), hipe_rtl:enter_type(I), Relocs, CallArgs, FinalArgs),
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
I3 = hipe_llvm:mk_call(T1, true, "cc 11", [], FunRetTy, Name, FinalArgs, []),
I4 = hipe_llvm:mk_ret([{FunRetTy, T1}]),
{[I4, I3, I2, I1, I0], NewRelocs}.
%%
%% fconv
%%
trans_fconv(I, Relocs) ->
%% XXX: Can a fconv destination be a precoloured reg?
RtlDst = hipe_rtl:fconv_dst(I),
TmpDst = mk_temp(),
{Src, I1} = trans_float_src(hipe_rtl:fconv_src(I)),
FloatTy = hipe_llvm:mk_double(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I2 = hipe_llvm:mk_conversion(TmpDst, sitofp, WordTy, Src, FloatTy),
I3 = store_float_stack(TmpDst, RtlDst),
{[I3, I2, I1], Relocs}.
%% TODO: fload, fstore, fmove, and fp are almost the same with load, store, move
%% and alu. Maybe we should join them.
%%
%% fload
%%
trans_fload(I, Relocs) ->
RtlDst = hipe_rtl:fload_dst(I),
RtlSrc = hipe_rtl:fload_src(I),
_Offset = hipe_rtl:fload_offset(I),
TmpDst = mk_temp(),
{Src, I1} = trans_float_src(RtlSrc),
{Offset, I2} = trans_float_src(_Offset),
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FloatTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_double()),
I3 = hipe_llvm:mk_operation(T1, add, WordTy, Src, Offset, []),
T2 = mk_temp(),
I4 = hipe_llvm:mk_conversion(T2, inttoptr, WordTy, T1, FloatTyPtr),
I5 = hipe_llvm:mk_load(TmpDst, FloatTyPtr, T2, [], [], false),
I6 = store_float_stack(TmpDst, RtlDst),
{[I6, I5, I4, I3, I2, I1], Relocs}.
%%
%% fmove
%%
trans_fmove(I, Relocs) ->
RtlDst = hipe_rtl:fmove_dst(I),
RtlSrc = hipe_rtl:fmove_src(I),
{Src, I1} = trans_float_src(RtlSrc),
I2 = store_float_stack(Src, RtlDst),
{[I2, I1], Relocs}.
%%
%% fp
%%
trans_fp(I, Relocs) ->
%% XXX: Just copied trans_alu...think again..
RtlDst = hipe_rtl:fp_dst(I),
RtlSrc1 = hipe_rtl:fp_src1(I),
RtlSrc2 = hipe_rtl:fp_src2(I),
%% Destination cannot be a precoloured register
FloatTy = hipe_llvm:mk_double(),
FloatTyPtr = hipe_llvm:mk_pointer(FloatTy),
TmpDst = mk_temp(),
{Src1, I1} = trans_float_src(RtlSrc1),
{Src2, I2} = trans_float_src(RtlSrc2),
Op = trans_fp_op(hipe_rtl:fp_op(I)),
I3 = hipe_llvm:mk_operation(TmpDst, Op, FloatTy, Src1, Src2, []),
I4 = store_float_stack(TmpDst, RtlDst),
%% Synchronization for floating point exceptions
I5 = hipe_llvm:mk_store(FloatTy, TmpDst, FloatTyPtr, "%exception_sync", [],
[], true),
T1 = mk_temp(),
I6 = hipe_llvm:mk_load(T1, FloatTyPtr, "%exception_sync", [], [], true),
{[I6, I5, I4, I3, I2, I1], Relocs}.
%%
%% fp_unop
%%
trans_fp_unop(I, Relocs) ->
RtlDst = hipe_rtl:fp_unop_dst(I),
RtlSrc = hipe_rtl:fp_unop_src(I),
%% Destination cannot be a precoloured register
TmpDst = mk_temp(),
{Src, I1} = trans_float_src(RtlSrc),
Op = trans_fp_op(hipe_rtl:fp_unop_op(I)),
FloatTy = hipe_llvm:mk_double(),
I2 = hipe_llvm:mk_operation(TmpDst, Op, FloatTy, "0.0", Src, []),
I3 = store_float_stack(TmpDst, RtlDst),
{[I3, I2, I1], Relocs}.
%% TODO: Fix fp_unop in a way like the following. You must change trans_dest,
%% in order to call float_to_list in a case of float constant. Maybe the type
%% check is expensive...
%% Dst = hipe_rtl:fp_unop_dst(I),
%% Src = hipe_rtl:fp_unop_src(I),
%% Op = hipe_rtl:fp_unop_op(I),
%% Zero = hipe_rtl:mk_imm(0.0),
%% I1 = hipe_rtl:mk_fp(Dst, Zero, Op, Src),
%% trans_fp(I, Relocs1).
%%
%% fstore
%%
trans_fstore(I, Relocs) ->
Base = hipe_rtl:fstore_base(I),
case isPrecoloured(Base) of
true ->
trans_fstore_reg(I, Relocs);
false ->
exit({?MODULE, trans_fstore ,{"Not implemented yet", false}})
end.
trans_fstore_reg(I, Relocs) ->
{Base, I0} = trans_reg(hipe_rtl:fstore_base(I), dst),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
FloatTy = hipe_llvm:mk_double(),
FloatTyPtr = hipe_llvm:mk_pointer(FloatTy),
T1 = mk_temp(),
I1 = hipe_llvm:mk_load(T1, WordTyPtr, Base, [], [], false),
{Offset, I2} = trans_src(hipe_rtl:fstore_offset(I)),
T2 = mk_temp(),
I3 = hipe_llvm:mk_operation(T2, add, WordTy, T1, Offset, []),
T3 = mk_temp(),
I4 = hipe_llvm:mk_conversion(T3, inttoptr, WordTy, T2, FloatTyPtr),
{Value, I5} = trans_src(hipe_rtl:fstore_src(I)),
I6 = hipe_llvm:mk_store(FloatTy, Value, FloatTyPtr, T3, [], [], false),
{[I6, I5, I4, I3, I2, I1, I0], Relocs}.
%%
%% goto
%%
trans_goto(I, Relocs) ->
I1 = hipe_llvm:mk_br(mk_jump_label(hipe_rtl:goto_label(I))),
{I1, Relocs}.
%%
%% label
%%
trans_label(I, Relocs) ->
Label = mk_label(hipe_rtl:label_name(I)),
I1 = hipe_llvm:mk_label(Label),
{I1, Relocs}.
%%
%% load
%%
trans_load(I, Relocs) ->
RtlDst = hipe_rtl:load_dst(I),
TmpDst = mk_temp(),
%% XXX: Why translate them independently? ------------------------
{Src, I1} = trans_src(hipe_rtl:load_src(I)),
{Offset, I2} = trans_src(hipe_rtl:load_offset(I)),
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
I3 = hipe_llvm:mk_operation(T1, add, WordTy, Src, Offset, []),
%%----------------------------------------------------------------
I4 = case hipe_rtl:load_size(I) of
word ->
T2 = mk_temp(),
II1 = hipe_llvm:mk_conversion(T2, inttoptr, WordTy, T1, WordTyPtr),
II2 = hipe_llvm:mk_load(TmpDst, WordTyPtr, T2, [], [], false),
[II2, II1];
Size ->
LoadType = llvm_type_from_size(Size),
LoadTypeP = hipe_llvm:mk_pointer(LoadType),
T2 = mk_temp(),
II1 = hipe_llvm:mk_conversion(T2, inttoptr, WordTy, T1, LoadTypeP),
T3 = mk_temp(),
LoadTypePointer = hipe_llvm:mk_pointer(LoadType),
II2 = hipe_llvm:mk_load(T3, LoadTypePointer, T2, [], [], false),
Conversion =
case hipe_rtl:load_sign(I) of
signed -> sext;
unsigned -> zext
end,
II3 =
hipe_llvm:mk_conversion(TmpDst, Conversion, LoadType, T3, WordTy),
[II3, II2, II1]
end,
I5 = store_stack_dst(TmpDst, RtlDst),
{[I5, I4, I3, I2, I1], Relocs}.
%%
%% load_address
%%
trans_load_address(I, Relocs) ->
RtlDst = hipe_rtl:load_address_dst(I),
RtlAddr = hipe_rtl:load_address_addr(I),
{Addr, NewRelocs} =
case hipe_rtl:load_address_type(I) of
constant ->
{"%DL" ++ integer_to_list(RtlAddr) ++ "_var", Relocs};
closure ->
{{_, ClosureName, _}, _, _} = RtlAddr,
FixedClosureName = fix_closure_name(ClosureName),
Relocs1 = relocs_store(FixedClosureName, {closure, RtlAddr}, Relocs),
{"%" ++ FixedClosureName ++ "_var", Relocs1};
type ->
exit({?MODULE, trans_load_address,
{"Type not implemented in load_address", RtlAddr}})
end,
I1 = store_stack_dst(Addr, RtlDst),
{[I1], NewRelocs}.
%%
%% load_atom
%%
trans_load_atom(I, Relocs) ->
RtlDst = hipe_rtl:load_atom_dst(I),
RtlAtom = hipe_rtl:load_atom_atom(I),
AtomName = "atom_" ++ make_llvm_id(atom_to_list(RtlAtom)),
AtomVar = "%" ++ AtomName ++ "_var",
NewRelocs = relocs_store(AtomName, {atom, RtlAtom}, Relocs),
I1 = store_stack_dst(AtomVar, RtlDst),
{[I1], NewRelocs}.
%%
%% move
%%
trans_move(I, Relocs) ->
RtlDst = hipe_rtl:move_dst(I),
RtlSrc = hipe_rtl:move_src(I),
{Src, I1} = trans_src(RtlSrc),
I2 = store_stack_dst(Src, RtlDst),
{[I2, I1], Relocs}.
%%
%% return
%%
trans_return(I, Relocs) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
{VarRet, I1} =
case hipe_rtl:return_varlist(I) of
[] ->
{[], []};
[A] ->
{Name, II1} = trans_src(A),
{[{WordTy, Name}], II1}
end,
FixedRegs = fixed_registers(),
{LoadedFixedRegs, I2} = load_fixed_regs(FixedRegs),
FixedRet = [{WordTy, X} || X <- LoadedFixedRegs],
Ret = FixedRet ++ VarRet,
{RetTypes, _RetNames} = lists:unzip(Ret),
Type = hipe_llvm:mk_struct(RetTypes),
{RetStruct, I3} = mk_return_struct(Ret, Type),
I4 = hipe_llvm:mk_ret([{Type, RetStruct}]),
{[I4, I3, I2, I1], Relocs}.
%% @doc Create a structure to hold the return value and the precoloured
%% registers.
mk_return_struct(RetValues, Type) ->
mk_return_struct(RetValues, Type, [], "undef", 0).
mk_return_struct([], _, Acc, StructName, _) ->
{StructName, Acc};
mk_return_struct([{ElemType, ElemName}|Rest], Type, Acc, StructName, Index) ->
T1 = mk_temp(),
I1 = hipe_llvm:mk_insertvalue(T1, Type, StructName, ElemType, ElemName,
integer_to_list(Index), []),
mk_return_struct(Rest, Type, [I1 | Acc], T1, Index+1).
%%
%% store
%%
trans_store(I, Relocs) ->
{Base, I1} = trans_src(hipe_rtl:store_base(I)),
{Offset, I2} = trans_src(hipe_rtl:store_offset(I)),
{Value, I3} = trans_src(hipe_rtl:store_src(I)),
T1 = mk_temp(),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
I4 = hipe_llvm:mk_operation(T1, add, WordTy, Base, Offset, []),
I5 =
case hipe_rtl:store_size(I) of
word ->
T2 = mk_temp(),
II1 = hipe_llvm:mk_conversion(T2, inttoptr, WordTy, T1, WordTyPtr),
II2 = hipe_llvm:mk_store(WordTy, Value, WordTyPtr, T2, [], [],
false),
[II2, II1];
Size ->
%% XXX: Is always trunc correct ?
LoadType = llvm_type_from_size(Size),
LoadTypePointer = hipe_llvm:mk_pointer(LoadType),
T2 = mk_temp(),
II1 = hipe_llvm:mk_conversion(T2, inttoptr, WordTy, T1, LoadTypePointer),
T3 = mk_temp(),
II2 = hipe_llvm:mk_conversion(T3, 'trunc', WordTy, Value, LoadType),
II3 = hipe_llvm:mk_store(LoadType, T3, LoadTypePointer, T2, [], [], false),
[II3, II2, II1]
end,
{[I5, I4, I3, I2, I1], Relocs}.
%%
%% switch
%%
trans_switch(I, Relocs, Data) ->
RtlSrc = hipe_rtl:switch_src(I),
{Src, I1} = trans_src(RtlSrc),
Labels = hipe_rtl:switch_labels(I),
JumpLabels = [mk_jump_label(L) || L <- Labels],
SortOrder = hipe_rtl:switch_sort_order(I),
NrLabels = length(Labels),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
TableType = hipe_llvm:mk_array(NrLabels, ByteTyPtr),
TableTypeP = hipe_llvm:mk_pointer(TableType),
TypedJumpLabels = [{hipe_llvm:mk_label_type(), X} || X <- JumpLabels],
T1 = mk_temp(),
{Src2, []} = trans_dst(RtlSrc),
TableName = "table_" ++ tl(Src2),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I2 = hipe_llvm:mk_getelementptr(T1, TableTypeP, "@"++TableName,
[{WordTy, "0"}, {WordTy, Src}], false),
T2 = mk_temp(),
BYTE_TYPE_PP = hipe_llvm:mk_pointer(ByteTyPtr),
I3 = hipe_llvm:mk_load(T2, BYTE_TYPE_PP, T1, [], [], false),
I4 = hipe_llvm:mk_indirectbr(ByteTyPtr, T2, TypedJumpLabels),
LMap = [{label, L} || L <- Labels],
%% Update data with the info for the jump table
{NewData, JTabLab} =
case hipe_rtl:switch_sort_order(I) of
[] ->
hipe_consttab:insert_block(Data, word, LMap);
SortOrder ->
hipe_consttab:insert_sorted_block(Data, word, LMap, SortOrder)
end,
Relocs2 = relocs_store(TableName, {switch, {TableType, Labels, NrLabels,
SortOrder}, JTabLab}, Relocs),
{[I4, I3, I2, I1], Relocs2, NewData}.
%% @doc Pass on RTL code in order to fix invoke and closure calls.
fix_code(Code) ->
fix_calls(Code).
%% @doc Fix invoke calls and closure calls with more than ?NR_ARG_REGS
%% arguments.
fix_calls(Code) ->
fix_calls(Code, [], []).
fix_calls([], Acc, FailLabels) ->
{lists:reverse(Acc), FailLabels};
fix_calls([I | Is], Acc, FailLabels) ->
case hipe_rtl:is_call(I) of
true ->
{NewCall, NewFailLabels} =
case hipe_rtl:call_fail(I) of
[] ->
{I, FailLabels};
FailLabel ->
fix_invoke_call(I, FailLabel, FailLabels)
end,
fix_calls(Is, [NewCall|Acc], NewFailLabels);
false ->
fix_calls(Is, [I|Acc], FailLabels)
end.
%% @doc When a call has a fail continuation label it must be extended with a
%% normal continuation label to go with the LLVM's invoke instruction.
%% FailLabels is the list of labels of all fail blocks, which are needed to
%% be declared as landing pads. Furtermore, we must add to fail labels a
%% call to hipe_bifs:llvm_fix_pinned_regs/0 in order to avoid reloading old
%% values of pinned registers. This may happen because the result of an
%% invoke instruction is not available at fail-labels, and, thus, we cannot
%% get the correct values of pinned registers. Finally, the stack needs to
%% be re-adjusted when there are stack arguments.
fix_invoke_call(I, FailLabel, FailLabels) ->
NewLabel = hipe_gensym:new_label(llvm),
NewCall1 = hipe_rtl:call_normal_update(I, NewLabel),
SpAdj = find_sp_adj(hipe_rtl:call_arglist(I)),
case lists:keyfind(FailLabel, 1, FailLabels) of
%% Same fail label with same Stack Pointer adjustment
{FailLabel, NewFailLabel, SpAdj} ->
NewCall2 = hipe_rtl:call_fail_update(NewCall1, NewFailLabel),
{NewCall2, FailLabels};
%% Same fail label but with different Stack Pointer adjustment
{_, _, _} ->
NewFailLabel = hipe_gensym:new_label(llvm),
NewCall2 = hipe_rtl:call_fail_update(NewCall1, NewFailLabel),
{NewCall2, [{FailLabel, NewFailLabel, SpAdj} | FailLabels]};
%% New Fail label
false ->
NewFailLabel = hipe_gensym:new_label(llvm),
NewCall2 = hipe_rtl:call_fail_update(NewCall1, NewFailLabel),
{NewCall2, [{FailLabel, NewFailLabel, SpAdj} | FailLabels]}
end.
find_sp_adj(ArgList) ->
NrArgs = length(ArgList),
case NrArgs > ?NR_ARG_REGS of
true ->
(NrArgs - ?NR_ARG_REGS) * hipe_rtl_arch:word_size();
false ->
0
end.
%% @doc Add landingpad instruction in Fail Blocks.
add_landingpads(LLVM_Code, FailLabels) ->
FailLabels2 = [convert_label(T) || T <- FailLabels],
add_landingpads(LLVM_Code, FailLabels2, []).
add_landingpads([], _, Acc) ->
lists:reverse(Acc);
add_landingpads([I | Is], FailLabels, Acc) ->
case hipe_llvm:is_label(I) of
true ->
Label = hipe_llvm:label_label(I),
Ins = create_fail_blocks(Label, FailLabels),
add_landingpads(Is, FailLabels, [I | Ins] ++ Acc);
false ->
add_landingpads(Is, FailLabels, [I | Acc])
end.
convert_label({X,Y,Z}) ->
{"L" ++ integer_to_list(X), "FL" ++ integer_to_list(Y), Z}.
%% @doc Create a fail block wich.
create_fail_blocks(_, []) -> [];
create_fail_blocks(Label, FailLabels) ->
create_fail_blocks(Label, FailLabels, []).
create_fail_blocks(Label, FailLabels, Acc) ->
case lists:keytake(Label, 1, FailLabels) of
false ->
Acc;
{value, {Label, FailLabel, SpAdj}, RestFailLabels} ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
I1 = hipe_llvm:mk_label(FailLabel),
LP = hipe_llvm:mk_landingpad(),
I2 =
case SpAdj > 0 of
true ->
StackPointer = ?ARCH_REGISTERS:reg_name(?ARCH_REGISTERS:sp()),
hipe_llvm:mk_adj_stack(integer_to_list(SpAdj), StackPointer,
WordTy);
false -> []
end,
T1 = mk_temp(),
FixedRegs = fixed_registers(),
FunRetTy =
hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
I3 = hipe_llvm:mk_call(T1, false, "cc 11", [], FunRetTy,
"@hipe_bifs.llvm_fix_pinned_regs.0", [], []),
I4 = store_fixed_regs(FixedRegs, T1),
I5 = hipe_llvm:mk_br("%" ++ Label),
Ins = lists:flatten([I5, I4, I3, I2, LP,I1]),
create_fail_blocks(Label, RestFailLabels, Ins ++ Acc)
end.
%%------------------------------------------------------------------------------
%% Miscellaneous Functions
%%------------------------------------------------------------------------------
%% @doc Convert RTL argument list to LLVM argument list.
trans_args(ArgList) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
MakeArg =
fun(A) ->
{Name, I1} = trans_src(A),
{{WordTy, Name}, I1}
end,
[MakeArg(A) || A <- ArgList].
%% @doc Convert a list of Precoloured registers to LLVM argument list.
fix_reg_args(ArgList) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
[{WordTy, A} || A <- ArgList].
%% @doc Load Precoloured registers.
load_fixed_regs(RegList) ->
Names = [mk_temp_reg(R) || R <- RegList],
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
Fun1 =
fun (X, Y) ->
hipe_llvm:mk_load(X, WordTyPtr, "%" ++ Y ++ "_reg_var", [], [], false)
end,
Ins = lists:zipwith(Fun1, Names, RegList),
{Names, Ins}.
%% @doc Store Precoloured registers.
store_fixed_regs(RegList, Name) ->
Names = [mk_temp_reg(R) || R <- RegList],
Indexes = lists:seq(0, erlang:length(RegList) - 1),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
Fun1 =
fun(X,Y) ->
hipe_llvm:mk_extractvalue(X, FunRetTy, Name, integer_to_list(Y), [])
end,
I1 = lists:zipwith(Fun1, Names, Indexes),
Fun2 =
fun (X, Y) ->
hipe_llvm:mk_store(WordTy, X, WordTyPtr, "%" ++ Y ++ "_reg_var", [], [],
false)
end,
I2 = lists:zipwith(Fun2, Names, RegList),
[I2, I1].
%%------------------------------------------------------------------------------
%% Translation of Names
%%------------------------------------------------------------------------------
%% @doc Fix F in MFA tuple to acceptable LLVM identifier (case of closure).
-spec fix_mfa_name(mfa()) -> mfa().
fix_mfa_name({Mod_Name, Closure_Name, Arity}) ->
Fun_Name = list_to_atom(fix_closure_name(Closure_Name)),
{Mod_Name, Fun_Name, Arity}.
%% @doc Make an acceptable LLVM identifier for a closure name.
fix_closure_name(ClosureName) ->
make_llvm_id(atom_to_list(ClosureName)).
%% @doc Create an acceptable LLVM identifier.
make_llvm_id(Name) ->
case Name of
"" -> "Empty";
Other -> lists:flatten([llvm_id(C) || C <- Other])
end.
llvm_id(C) when C=:=46; C>47 andalso C<58; C>64 andalso C<91; C=:=95;
C>96 andalso C<123 ->
C;
llvm_id(C) ->
io_lib:format("_~2.16.0B_",[C]).
%% @doc Create an acceptable LLVM identifier for an MFA.
trans_mfa_name({M,F,A}, Linkage) ->
N0 = atom_to_list(M) ++ "." ++ atom_to_list(F) ++ "." ++ integer_to_list(A),
N = case Linkage of
not_remote -> N0;
remote -> "rem." ++ N0
end,
make_llvm_id(N).
%%------------------------------------------------------------------------------
%% Creation of Labels and Temporaries
%%------------------------------------------------------------------------------
mk_label(N) ->
"L" ++ integer_to_list(N).
mk_jump_label(N) ->
"%L" ++ integer_to_list(N).
mk_temp() ->
"%t" ++ integer_to_list(hipe_gensym:new_var(llvm)).
mk_temp_reg(Name) ->
"%" ++ Name ++ integer_to_list(hipe_gensym:new_var(llvm)).
%%----------------------------------------------------------------------------
%% Translation of Operands
%%----------------------------------------------------------------------------
store_stack_dst(TempDst, Dst) ->
{Dst2, II1} = trans_dst(Dst),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
II2 = hipe_llvm:mk_store(WordTy, TempDst, WordTyPtr, Dst2, [], [], false),
[II2, II1].
store_float_stack(TempDst, Dst) ->
{Dst2, II1} = trans_dst(Dst),
FloatTy = hipe_llvm:mk_double(),
FloatTyPtr = hipe_llvm:mk_pointer(FloatTy),
II2 = hipe_llvm:mk_store(FloatTy, TempDst, FloatTyPtr, Dst2, [], [], false),
[II2, II1].
trans_float_src(Src) ->
case hipe_rtl:is_const_label(Src) of
true ->
Name = "@DL" ++ integer_to_list(hipe_rtl:const_label_label(Src)),
T1 = mk_temp(),
%% XXX: Hardcoded offset
ByteTy = hipe_llvm:mk_int(?BITS_IN_BYTE),
ByteTyPtr = hipe_llvm:mk_pointer(ByteTy),
I1 = hipe_llvm:mk_getelementptr(T1, ByteTyPtr, Name,
[{ByteTy, integer_to_list(?FLOAT_OFFSET)}], true),
T2 = mk_temp(),
FloatTy = hipe_llvm:mk_double(),
FloatTyPtr = hipe_llvm:mk_pointer(FloatTy),
I2 = hipe_llvm:mk_conversion(T2, bitcast, ByteTyPtr, T1, FloatTyPtr),
T3 = mk_temp(),
I3 = hipe_llvm:mk_load(T3, FloatTyPtr, T2, [], [], false),
{T3, [I3, I2, I1]};
false ->
trans_src(Src)
end.
trans_src(A) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
case hipe_rtl:is_imm(A) of
true ->
Value = integer_to_list(hipe_rtl:imm_value(A)),
{Value, []};
false ->
case hipe_rtl:is_reg(A) of
true ->
case isPrecoloured(A) of
true -> trans_reg(A, src);
false ->
{Name, []} = trans_reg(A, src),
T1 = mk_temp(),
I1 = hipe_llvm:mk_load(T1, WordTyPtr, Name, [], [], false),
{T1, [I1]}
end;
false ->
case hipe_rtl:is_var(A) of
true ->
RootName = "%vr" ++ integer_to_list(hipe_rtl:var_index(A)),
T1 = mk_temp(),
I1 = hipe_llvm:mk_load(T1, WordTyPtr, RootName, [], [], false),
I2 =
case hipe_rtl:var_liveness(A) of
live ->
[];
dead ->
NilValue = hipe_tagscheme:mk_nil(),
hipe_llvm:mk_store(WordTy, integer_to_list(NilValue), WordTyPtr, RootName,
[], [], false)
end,
{T1, [I2, I1]};
false ->
case hipe_rtl:is_fpreg(A) of
true ->
{Name, []} = trans_dst(A),
T1 = mk_temp(),
FloatTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_double()),
I1 = hipe_llvm:mk_load(T1, FloatTyPtr, Name, [], [], false),
{T1, [I1]};
false -> trans_dst(A)
end
end
end
end.
trans_dst(A) ->
case hipe_rtl:is_reg(A) of
true ->
trans_reg(A, dst);
false ->
Name = case hipe_rtl:is_var(A) of
true ->
"%vr" ++ integer_to_list(hipe_rtl:var_index(A));
false ->
case hipe_rtl:is_fpreg(A) of
true -> "%fr" ++ integer_to_list(hipe_rtl:fpreg_index(A));
false ->
case hipe_rtl:is_const_label(A) of
true ->
"%DL" ++ integer_to_list(hipe_rtl:const_label_label(A)) ++ "_var";
false ->
exit({?MODULE, trans_dst, {"Bad RTL argument",A}})
end
end
end,
{Name, []}
end.
%% @doc Translate a register. If it is precoloured it must be mapped to the
%% correct stack slot that holds the precoloured register value.
trans_reg(Arg, Position) ->
Index = hipe_rtl:reg_index(Arg),
case isPrecoloured(Arg) of
true ->
Name = map_precoloured_reg(Index),
case Position of
src -> fix_reg_src(Name);
dst -> fix_reg_dst(Name)
end;
false ->
{hipe_rtl_arch:reg_name(Index), []}
end.
map_precoloured_reg(Index) ->
case hipe_rtl_arch:reg_name(Index) of
"%r15" -> "%hp_reg_var";
"%rbp" -> "%p_reg_var";
"%esi" -> "%hp_reg_var";
"%ebp" -> "%p_reg_var";
"%fcalls" ->
{"%p_reg_var", ?ARCH_REGISTERS:proc_offset(?ARCH_REGISTERS:fcalls())};
"%hplim" ->
{"%p_reg_var", ?ARCH_REGISTERS:proc_offset(?ARCH_REGISTERS:heap_limit())};
_ ->
exit({?MODULE, map_precoloured_reg, {"Register not mapped yet", Index}})
end.
%% @doc Load precoloured dst register.
fix_reg_dst(Register) ->
case Register of
{Name, Offset} -> %% Case of %fcalls, %hplim
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
pointer_from_reg(Name, WordTy, Offset);
Name -> %% Case of %p and %hp
{Name, []}
end.
%% @doc Load precoloured src register.
fix_reg_src(Register) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
case Register of
{Name, Offset} -> %% Case of %fcalls, %hplim
{T1, I1} = pointer_from_reg(Name, WordTy, Offset),
T2 = mk_temp(),
I2 = hipe_llvm:mk_load(T2, WordTyPtr, T1, [], [] , false),
{T2, [I2, I1]};
Name -> %% Case of %p and %hp
T1 = mk_temp(),
{T1, hipe_llvm:mk_load(T1, WordTyPtr, Name, [], [], false)}
end.
%% @doc Load %fcalls and %hplim.
pointer_from_reg(RegName, Type, Offset) ->
PointerType = hipe_llvm:mk_pointer(Type),
T1 = mk_temp(),
I1 = hipe_llvm:mk_load(T1, PointerType, RegName, [], [] ,false),
T2 = mk_temp(),
I2 = hipe_llvm:mk_conversion(T2, inttoptr, Type, T1, PointerType),
T3 = mk_temp(),
%% XXX: Offsets should be a power of 2.
I3 = hipe_llvm:mk_getelementptr(T3, PointerType, T2,
[{Type, integer_to_list(Offset div hipe_rtl_arch:word_size())}], true),
{T3, [I3, I2, I1]}.
isPrecoloured(X) ->
hipe_rtl_arch:is_precoloured(X).
%%------------------------------------------------------------------------------
%% Translation of operators
%%------------------------------------------------------------------------------
trans_op(Op) ->
case Op of
add -> add;
sub -> sub;
'or' -> 'or';
'and' -> 'and';
'xor' -> 'xor';
sll -> shl;
srl -> lshr;
sra -> ashr;
mul -> mul;
'fdiv' -> fdiv;
'sdiv' -> sdiv;
'srem' -> srem;
Other -> exit({?MODULE, trans_op, {"Unknown RTL operator", Other}})
end.
trans_rel_op(Op) ->
case Op of
eq -> eq;
ne -> ne;
gtu -> ugt;
geu -> uge;
ltu -> ult;
leu -> ule;
gt -> sgt;
ge -> sge;
lt -> slt;
le -> sle
end.
trans_prim_op(Op) ->
case Op of
'+' -> "bif_add";
'-' -> "bif_sub";
'*' -> "bif_mul";
'div' -> "bif_div";
'/' -> "bif_div";
Other -> atom_to_list(Other)
end.
trans_fp_op(Op) ->
case Op of
fadd -> fadd;
fsub -> fsub;
fdiv -> fdiv;
fmul -> fmul;
fchs -> fsub;
Other -> exit({?MODULE, trans_fp_op, {"Unknown RTL float operator",Other}})
end.
%% Misc.
insn_dst(I) ->
case I of
#alu{} ->
[hipe_rtl:alu_dst(I)];
#alub{} ->
[hipe_rtl:alub_dst(I)];
#call{} ->
case hipe_rtl:call_dstlist(I) of
[] -> [];
[Dst] -> [Dst]
end;
#load{} ->
[hipe_rtl:load_dst(I)];
#load_address{} ->
[hipe_rtl:load_address_dst(I)];
#load_atom{} ->
[hipe_rtl:load_atom_dst(I)];
#move{} ->
[hipe_rtl:move_dst(I)];
#phi{} ->
[hipe_rtl:phi_dst(I)];
#fconv{} ->
[hipe_rtl:fconv_dst(I)];
#fload{} ->
[hipe_rtl:fload_dst(I)];
#fmove{} ->
[hipe_rtl:fmove_dst(I)];
#fp{} ->
[hipe_rtl:fp_dst(I)];
#fp_unop{} ->
[hipe_rtl:fp_unop_dst(I)];
_ ->
[]
end.
llvm_type_from_size(Size) ->
case Size of
byte -> hipe_llvm:mk_int(?BITS_IN_BYTE);
int16 -> hipe_llvm:mk_int(16);
int32 -> hipe_llvm:mk_int(32);
word -> hipe_llvm:mk_int(?BITS_IN_WORD)
end.
%% @doc Create definition for the compiled function. The parameters that are
%% passed to the stack must be reversed to match with the CC. Also
%% precoloured registers that are passed as arguments must be stored to
%% the corresonding stack slots.
create_function_definition(Fun, Params, Code, LocalVars) ->
FunctionName = trans_mfa_name(Fun, not_remote),
FixedRegs = fixed_registers(),
%% Reverse parameters to match with the Erlang calling convention
ReversedParams =
case erlang:length(Params) > ?NR_ARG_REGS of
false ->
Params;
true ->
{ParamsInRegs, ParamsInStack} = lists:split(?NR_ARG_REGS, Params),
ParamsInRegs ++ lists:reverse(ParamsInStack)
end,
Args = header_regs(FixedRegs) ++ header_params(ReversedParams),
EntryLabel = hipe_llvm:mk_label("Entry"),
FloatTy = hipe_llvm:mk_double(),
ExceptionSync = hipe_llvm:mk_alloca("%exception_sync", FloatTy, [], []),
I2 = load_regs(FixedRegs),
I3 = hipe_llvm:mk_br(mk_jump_label(get(first_label))),
StoredParams = store_params(Params),
EntryBlock =
lists:flatten([EntryLabel, ExceptionSync, I2, LocalVars, StoredParams, I3]),
Final_Code = EntryBlock ++ Code,
FunctionOptions = [nounwind, noredzone, list_to_atom("gc \"erlang\"")],
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
hipe_llvm:mk_fun_def([], [], "cc 11", [], FunRetTy, FunctionName, Args,
FunctionOptions, [], Final_Code).
header_params(Params) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
[{WordTy, "%v" ++ integer_to_list(hipe_rtl:var_index(P))} || P <- Params].
store_params(Params) ->
Fun1 =
fun(X) ->
Index = hipe_rtl:var_index(X),
{Name, _} = trans_dst(X),
ParamName = "%v" ++ integer_to_list(Index),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
hipe_llvm:mk_store(WordTy, ParamName, WordTyPtr, Name, [], [], false)
end,
lists:map(Fun1, Params).
fixed_registers() ->
case get(hipe_target_arch) of
x86 ->
["hp", "p"];
amd64 ->
["hp", "p"];
Other ->
exit({?MODULE, map_registers, {"Unknown architecture", Other}})
end.
header_regs(Registers) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
[{WordTy, "%" ++ X ++ "_in"} || X <- Registers].
load_regs(Registers) ->
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
WordTyPtr = hipe_llvm:mk_pointer(WordTy),
Fun1 =
fun(X) ->
I1 = hipe_llvm:mk_alloca("%" ++ X ++ "_reg_var", WordTy, [], []),
I2 = hipe_llvm:mk_store(WordTy, "%" ++ X ++ "_in", WordTyPtr,
"%" ++ X ++ "_reg_var", [], [], false),
[I1, I2]
end,
lists:map(Fun1, Registers).
%%------------------------------------------------------------------------------
%% Relocation-specific Stuff
%%------------------------------------------------------------------------------
relocs_store(Key, Value, Relocs) ->
dict:store(Key, Value, Relocs).
relocs_to_list(Relocs) ->
dict:to_list(Relocs).
%% @doc This function is responsible for the actions needed to handle
%% relocations:
%% 1) Updates relocations with constants and switch jump tables.
%% 2) Creates LLVM code to declare relocations as external
%% functions/constants.
%% 3) Creates LLVM code in order to create local variables for the external
%% constants/labels.
handle_relocations(Relocs, Data, Fun) ->
RelocsList = relocs_to_list(Relocs),
%% Seperate Relocations according to their type
{CallList, AtomList, ClosureList, ClosureLabels, SwitchList} =
seperate_relocs(RelocsList),
%% Create code to declare atoms
AtomDecl = [declare_atom(A) || A <- AtomList],
%% Create code to create local name for atoms
AtomLoad = [load_atom(A) || A <- AtomList],
%% Create code to declare closures
ClosureDecl = [declare_closure(C) || C <- ClosureList],
%% Create code to create local name for closures
ClosureLoad = [load_closure(C) || C <- ClosureList],
%% Find function calls
IsExternalCall = fun (X) -> is_external_call(X, Fun) end,
ExternalCallList = lists:filter(IsExternalCall, CallList),
%% Create code to declare external function
FunDecl = fixed_fun_decl() ++ [call_to_decl(C) || C <- ExternalCallList],
%% Extract constant labels from Constant Map (remove duplicates)
ConstLabels = hipe_consttab:labels(Data),
%% Create code to declare constants
ConstDecl = [declare_constant(C) || C <- ConstLabels],
%% Create code to create local name for constants
ConstLoad = [load_constant(C) || C <- ConstLabels],
%% Create code to create jump tables
SwitchDecl = declare_switches(SwitchList, Fun),
%% Create code to create a table with the labels of all closure calls
{ClosureLabelDecl, Relocs1} =
declare_closure_labels(ClosureLabels, Relocs, Fun),
%% Enter constants to relocations
Relocs2 = lists:foldl(fun const_to_dict/2, Relocs1, ConstLabels),
%% Temporary Store inc_stack and llvm_fix_pinned_regs to Dictionary
%% TODO: Remove this
Relocs3 = dict:store("inc_stack_0", {call, not_remote, {bif, inc_stack_0, 0}}, Relocs2),
Relocs4 = dict:store("hipe_bifs.llvm_fix_pinned_regs.0",
{call, remote, {hipe_bifs, llvm_fix_pinned_regs, 0}}, Relocs3),
BranchMetaData = [
hipe_llvm:mk_meta(?BRANCH_META_TAKEN, ["branch_weights", 99, 1])
, hipe_llvm:mk_meta(?BRANCH_META_NOT_TAKEN, ["branch_weights", 1, 99])
],
ExternalDeclarations = AtomDecl ++ ClosureDecl ++ ConstDecl ++ FunDecl ++
ClosureLabelDecl ++ SwitchDecl ++ BranchMetaData,
LocalVariables = AtomLoad ++ ClosureLoad ++ ConstLoad,
{Relocs4, ExternalDeclarations, LocalVariables}.
%% @doc Seperate relocations according to their type.
seperate_relocs(Relocs) ->
seperate_relocs(Relocs, [], [], [], [], []).
seperate_relocs([], CallAcc, AtomAcc, ClosureAcc, LabelAcc, JmpTableAcc) ->
{CallAcc, AtomAcc, ClosureAcc, LabelAcc, JmpTableAcc};
seperate_relocs([R|Rs], CallAcc, AtomAcc, ClosureAcc, LabelAcc, JmpTableAcc) ->
case R of
{_, {call, _, _}} ->
seperate_relocs(Rs, [R | CallAcc], AtomAcc, ClosureAcc, LabelAcc,
JmpTableAcc);
{_, {atom, _}} ->
seperate_relocs(Rs, CallAcc, [R | AtomAcc], ClosureAcc, LabelAcc,
JmpTableAcc);
{_, {closure, _}} ->
seperate_relocs(Rs, CallAcc, AtomAcc, [R | ClosureAcc], LabelAcc,
JmpTableAcc);
{_, {switch, _, _}} ->
seperate_relocs(Rs, CallAcc, AtomAcc, ClosureAcc, LabelAcc,
[R | JmpTableAcc]);
{_, {closure_label, _, _}} ->
seperate_relocs(Rs, CallAcc, AtomAcc, ClosureAcc, [R | LabelAcc],
JmpTableAcc)
end.
%% @doc External declaration of an atom.
declare_atom({AtomName, _}) ->
%% The type has to be byte, or a backend might assume the constant is aligned
%% and incorrectly optimise away type tests
ByteTy = hipe_llvm:mk_int(?BITS_IN_BYTE),
hipe_llvm:mk_const_decl("@" ++ AtomName, "external constant", ByteTy, "").
%% @doc Creation of local variable for an atom.
load_atom({AtomName, _}) ->
Dst = "%" ++ AtomName ++ "_var",
Name = "@" ++ AtomName,
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
hipe_llvm:mk_conversion(Dst, ptrtoint, ByteTyPtr, Name, WordTy).
%% @doc External declaration of a closure.
declare_closure({ClosureName, _})->
ByteTy = hipe_llvm:mk_int(?BITS_IN_BYTE),
hipe_llvm:mk_const_decl("@" ++ ClosureName, "external constant", ByteTy, "").
%% @doc Creation of local variable for a closure.
load_closure({ClosureName, _})->
Dst = "%" ++ ClosureName ++ "_var",
Name = "@" ++ ClosureName,
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
hipe_llvm:mk_conversion(Dst, ptrtoint, ByteTyPtr, Name, WordTy).
%% @doc Declaration of a local variable for a switch jump table.
declare_switches(JumpTableList, Fun) ->
FunName = trans_mfa_name(Fun, not_remote),
[declare_switch_table(X, FunName) || X <- JumpTableList].
declare_switch_table({Name, {switch, {TableType, Labels, _, _}, _}}, FunName) ->
LabelList = [mk_jump_label(L) || L <- Labels],
Fun1 = fun(X) -> "i8* blockaddress(@" ++ FunName ++ ", " ++ X ++ ")" end,
List2 = lists:map(Fun1, LabelList),
List3 = string:join(List2, ",\n"),
List4 = "[\n" ++ List3 ++ "\n]\n",
hipe_llvm:mk_const_decl("@" ++ Name, "constant", TableType, List4).
%% @doc Declaration of a variable for a table with the labels of all closure
%% calls in the code.
declare_closure_labels([], Relocs, _Fun) ->
{[], Relocs};
declare_closure_labels(ClosureLabels, Relocs, Fun) ->
FunName = trans_mfa_name(Fun, not_remote),
{LabelList, ArityList} =
lists:unzip([{mk_jump_label(Label), A} ||
{_, {closure_label, Label, A}} <- ClosureLabels]),
Relocs1 = relocs_store("table_closures", {table_closures, ArityList}, Relocs),
List2 =
["i8* blockaddress(@" ++ FunName ++ ", " ++ L ++ ")" || L <- LabelList],
List3 = string:join(List2, ",\n"),
List4 = "[\n" ++ List3 ++ "\n]\n",
NrLabels = length(LabelList),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
TableType = hipe_llvm:mk_array(NrLabels, ByteTyPtr),
ConstDecl =
hipe_llvm:mk_const_decl("@table_closures", "constant", TableType, List4),
{[ConstDecl], Relocs1}.
%% @doc A call is treated as non external only in a case of a local recursive
%% function.
is_external_call({_, {call, not_remote, MFA}}, MFA) -> false;
is_external_call(_, _) -> true.
%% @doc External declaration of a function.
call_to_decl({Name, {call, _, MFA}}) ->
{M, _F, A} = MFA,
CConv = "cc 11",
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
{Type, Args} =
case M of
llvm ->
{hipe_llvm:mk_struct([WordTy, hipe_llvm:mk_int(1)]), [1, 2]};
%% +precoloured regs
_ ->
{FunRetTy, lists:seq(1, A + ?NR_PINNED_REGS)}
end,
ArgsTypes = lists:duplicate(length(Args), WordTy),
hipe_llvm:mk_fun_decl([], [], CConv, [], Type, "@" ++ Name, ArgsTypes, []).
%% @doc These functions are always declared, even if not used.
fixed_fun_decl() ->
ByteTy = hipe_llvm:mk_int(?BITS_IN_BYTE),
ByteTyPtr = hipe_llvm:mk_pointer(ByteTy),
LandPad = hipe_llvm:mk_fun_decl([], [], [], [], hipe_llvm:mk_int(32),
"@__gcc_personality_v0", [hipe_llvm:mk_int(32), hipe_llvm:mk_int(64),
ByteTyPtr, ByteTyPtr], []),
GCROOTDecl = hipe_llvm:mk_fun_decl([], [], [], [], hipe_llvm:mk_void(),
"@llvm.gcroot", [hipe_llvm:mk_pointer(ByteTyPtr), ByteTyPtr], []),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
FunRetTy = hipe_llvm:mk_struct(lists:duplicate(?NR_PINNED_REGS + 1, WordTy)),
FixPinnedRegs = hipe_llvm:mk_fun_decl([], [], [], [], FunRetTy,
"@hipe_bifs.llvm_fix_pinned_regs.0", [], []),
GcMetadata = hipe_llvm:mk_const_decl("@gc_metadata", "external constant",
ByteTy, ""),
[LandPad, GCROOTDecl, FixPinnedRegs, GcMetadata].
%% @doc Declare an External Consant. We declare all constants as i8 in order to
%% be able to calcucate pointers of the form DL+6, with the getelementptr
%% instruction. Otherwise we have to convert constants form pointers to
%% values, add the offset and convert them again to pointers.
declare_constant(Label) ->
Name = "@DL" ++ integer_to_list(Label),
ByteTy = hipe_llvm:mk_int(?BITS_IN_BYTE),
hipe_llvm:mk_const_decl(Name, "external constant", ByteTy, "").
%% @doc Load a constant is achieved by converting a pointer to an integer of
%% the correct width.
load_constant(Label) ->
Dst = "%DL" ++ integer_to_list(Label) ++ "_var",
Name = "@DL" ++ integer_to_list(Label),
WordTy = hipe_llvm:mk_int(?BITS_IN_WORD),
ByteTyPtr = hipe_llvm:mk_pointer(hipe_llvm:mk_int(?BITS_IN_BYTE)),
hipe_llvm:mk_conversion(Dst, ptrtoint, ByteTyPtr, Name, WordTy).
%% @doc Store external constants and calls to dictionary.
const_to_dict(Elem, Dict) ->
Name = "DL" ++ integer_to_list(Elem),
dict:store(Name, {'constant', Elem}, Dict).
%% @doc Export the hipe literals that LLVM needs to generate the prologue as
%% metadata.
add_literals_metadata(ExternalDecls) ->
Pairs = [hipe_llvm:mk_meta(integer_to_list(?FIRST_FREE_META_NO),
["P_NSP_LIMIT", ?P_NSP_LIMIT])
,hipe_llvm:mk_meta(integer_to_list(?FIRST_FREE_META_NO + 1),
["X86_LEAF_WORDS", ?X86_LEAF_WORDS])
,hipe_llvm:mk_meta(integer_to_list(?FIRST_FREE_META_NO + 2),
["AMD64_LEAF_WORDS", ?AMD64_LEAF_WORDS])
],
[hipe_llvm:mk_meta(?HIPE_LITERALS_META, Pairs) |
Pairs ++ ExternalDecls].
