aboutsummaryrefslogtreecommitdiffstats
path: root/lib/hipe/arm
diff options
context:
space:
mode:
Diffstat (limited to 'lib/hipe/arm')
-rw-r--r--lib/hipe/arm/hipe_arm.erl7
-rw-r--r--lib/hipe/arm/hipe_arm.hrl1
-rw-r--r--lib/hipe/arm/hipe_arm_cfg.erl21
-rw-r--r--lib/hipe/arm/hipe_arm_defuse.erl2
-rw-r--r--lib/hipe/arm/hipe_arm_frame.erl22
-rw-r--r--lib/hipe/arm/hipe_arm_ra_finalise.erl25
-rw-r--r--lib/hipe/arm/hipe_arm_ra_postconditions.erl24
-rw-r--r--lib/hipe/arm/hipe_arm_subst.erl24
8 files changed, 112 insertions, 14 deletions
diff --git a/lib/hipe/arm/hipe_arm.erl b/lib/hipe/arm/hipe_arm.erl
index e34a00f561..3b090b501a 100644
--- a/lib/hipe/arm/hipe_arm.erl
+++ b/lib/hipe/arm/hipe_arm.erl
@@ -79,6 +79,9 @@
pseudo_move_dst/1,
pseudo_move_src/1,
+ mk_pseudo_spill_move/3,
+ is_pseudo_spill_move/1,
+
mk_pseudo_switch/3,
mk_pseudo_tailcall/4,
@@ -250,6 +253,10 @@ is_pseudo_move(I) -> case I of #pseudo_move{} -> true; _ -> false end.
pseudo_move_dst(#pseudo_move{dst=Dst}) -> Dst.
pseudo_move_src(#pseudo_move{src=Src}) -> Src.
+mk_pseudo_spill_move(Dst, Temp, Src) ->
+ #pseudo_spill_move{dst=Dst, temp=Temp, src=Src}.
+is_pseudo_spill_move(I) -> is_record(I, pseudo_spill_move).
+
mk_pseudo_switch(JTab, Index, Labels) ->
#pseudo_switch{jtab=JTab, index=Index, labels=Labels}.
diff --git a/lib/hipe/arm/hipe_arm.hrl b/lib/hipe/arm/hipe_arm.hrl
index 67bc07634e..be06b1ebd7 100644
--- a/lib/hipe/arm/hipe_arm.hrl
+++ b/lib/hipe/arm/hipe_arm.hrl
@@ -101,6 +101,7 @@
-record(pseudo_call_prepare, {nrstkargs}).
-record(pseudo_li, {dst, imm, label}). % pre-generated label for use by the assembler
-record(pseudo_move, {dst, src}).
+-record(pseudo_spill_move, {dst, temp, src}).
-record(pseudo_switch, {jtab, index, labels}).
-record(pseudo_tailcall, {funv, arity, stkargs, linkage}).
-record(pseudo_tailcall_prepare, {}).
diff --git a/lib/hipe/arm/hipe_arm_cfg.erl b/lib/hipe/arm/hipe_arm_cfg.erl
index ea6da67317..0bc3df30b9 100644
--- a/lib/hipe/arm/hipe_arm_cfg.erl
+++ b/lib/hipe/arm/hipe_arm_cfg.erl
@@ -24,6 +24,7 @@
-export([params/1, reverse_postorder/1]).
-export([arity/1]). % for linear scan
%%-export([redirect_jmp/3]).
+-export([branch_preds/1]).
%%% these tell cfg.inc what to define (ugly as hell)
-define(BREADTH_ORDER,true). % for linear scan
@@ -75,6 +76,26 @@ branch_successors(Branch) ->
#pseudo_tailcall{} -> []
end.
+branch_preds(Branch) ->
+ case Branch of
+ #pseudo_bc{true_label=TrueLab,false_label=FalseLab,pred=Pred} ->
+ [{FalseLab, 1.0-Pred}, {TrueLab, Pred}];
+ #pseudo_call{contlab=ContLab, sdesc=#arm_sdesc{exnlab=[]}} ->
+ %% A function can still cause an exception, even if we won't catch it
+ [{ContLab, 1.0-hipe_bb_weights:call_exn_pred()}];
+ #pseudo_call{contlab=ContLab, sdesc=#arm_sdesc{exnlab=ExnLab}} ->
+ CallExnPred = hipe_bb_weights:call_exn_pred(),
+ [{ContLab, 1.0-CallExnPred}, {ExnLab, CallExnPred}];
+ #pseudo_switch{labels=Labels} ->
+ Prob = 1.0/length(Labels),
+ [{L, Prob} || L <- Labels];
+ _ ->
+ case branch_successors(Branch) of
+ [] -> [];
+ [Single] -> [{Single, 1.0}]
+ end
+ end.
+
-ifdef(REMOVE_TRIVIAL_BBS_NEEDED).
fails_to(_Instr) -> [].
-endif.
diff --git a/lib/hipe/arm/hipe_arm_defuse.erl b/lib/hipe/arm/hipe_arm_defuse.erl
index 0e62070c6c..652299a514 100644
--- a/lib/hipe/arm/hipe_arm_defuse.erl
+++ b/lib/hipe/arm/hipe_arm_defuse.erl
@@ -40,6 +40,7 @@ insn_def_gpr(I) ->
#pseudo_call{} -> call_clobbered_gpr();
#pseudo_li{dst=Dst} -> [Dst];
#pseudo_move{dst=Dst} -> [Dst];
+ #pseudo_spill_move{dst=Dst, temp=Temp} -> [Dst, Temp];
#pseudo_tailcall_prepare{} -> tailcall_clobbered_gpr();
#smull{dstlo=DstLo,dsthi=DstHi,src1=Src1} ->
%% ARM requires DstLo, DstHi, and Src1 to be distinct.
@@ -83,6 +84,7 @@ insn_use_gpr(I) ->
#pseudo_call{funv=FunV,sdesc=#arm_sdesc{arity=Arity}} ->
funv_use(FunV, arity_use_gpr(Arity));
#pseudo_move{src=Src} -> [Src];
+ #pseudo_spill_move{src=Src} -> [Src];
#pseudo_switch{jtab=JTabR,index=IndexR} -> addtemp(JTabR, [IndexR]);
#pseudo_tailcall{funv=FunV,arity=Arity,stkargs=StkArgs} ->
addargs(StkArgs, addtemps(tailcall_clobbered_gpr(), funv_use(FunV, arity_use_gpr(Arity))));
diff --git a/lib/hipe/arm/hipe_arm_frame.erl b/lib/hipe/arm/hipe_arm_frame.erl
index e323907e31..a1004fb609 100644
--- a/lib/hipe/arm/hipe_arm_frame.erl
+++ b/lib/hipe/arm/hipe_arm_frame.erl
@@ -69,6 +69,8 @@ do_insn(I, LiveOut, Context, FPoff) ->
do_pseudo_call_prepare(I, FPoff);
#pseudo_move{} ->
{do_pseudo_move(I, Context, FPoff), FPoff};
+ #pseudo_spill_move{} ->
+ {do_pseudo_spill_move(I, Context, FPoff), FPoff};
#pseudo_tailcall{} ->
{do_pseudo_tailcall(I, Context), context_framesize(Context)};
_ ->
@@ -100,6 +102,26 @@ pseudo_offset(Temp, FPoff, Context) ->
FPoff + context_offset(Context, Temp).
%%%
+%%% Moves from one spill slot to another
+%%%
+
+do_pseudo_spill_move(I, Context, FPoff) ->
+ #pseudo_spill_move{dst=Dst, temp=Temp, src=Src} = I,
+ case temp_is_pseudo(Src) andalso temp_is_pseudo(Dst) of
+ false -> % Register allocator changed its mind, turn back to move
+ do_pseudo_move(hipe_arm:mk_pseudo_move(Dst, Src), Context, FPoff);
+ true ->
+ SrcOffset = pseudo_offset(Src, FPoff, Context),
+ DstOffset = pseudo_offset(Dst, FPoff, Context),
+ case SrcOffset =:= DstOffset of
+ true -> []; % omit move-to-self
+ false ->
+ mk_load('ldr', Temp, SrcOffset, mk_sp(),
+ mk_store('str', Temp, DstOffset, mk_sp(), []))
+ end
+ end.
+
+%%%
%%% Return - deallocate frame and emit 'ret $N' insn.
%%%
diff --git a/lib/hipe/arm/hipe_arm_ra_finalise.erl b/lib/hipe/arm/hipe_arm_ra_finalise.erl
index 9bfe0a9a83..80cd470708 100644
--- a/lib/hipe/arm/hipe_arm_ra_finalise.erl
+++ b/lib/hipe/arm/hipe_arm_ra_finalise.erl
@@ -25,11 +25,17 @@ ra_bb(BB, Map) ->
hipe_bb:code_update(BB, ra_code(hipe_bb:code(BB), Map, [])).
ra_code([I|Insns], Map, Accum) ->
- ra_code(Insns, Map, [ra_insn(I, Map) | Accum]);
+ ra_code(Insns, Map, ra_insn(I, Map, Accum));
ra_code([], _Map, Accum) ->
lists:reverse(Accum).
-ra_insn(I, Map) ->
+ra_insn(I, Map, Accum) ->
+ case I of
+ #pseudo_move{} -> ra_pseudo_move(I, Map, Accum);
+ _ -> [ra_insn_1(I, Map) | Accum]
+ end.
+
+ra_insn_1(I, Map) ->
case I of
#alu{} -> ra_alu(I, Map);
#cmp{} -> ra_cmp(I, Map);
@@ -38,7 +44,7 @@ ra_insn(I, Map) ->
#move{} -> ra_move(I, Map);
#pseudo_call{} -> ra_pseudo_call(I, Map);
#pseudo_li{} -> ra_pseudo_li(I, Map);
- #pseudo_move{} -> ra_pseudo_move(I, Map);
+ #pseudo_spill_move{} -> ra_pseudo_spill_move(I, Map);
#pseudo_switch{} -> ra_pseudo_switch(I, Map);
#pseudo_tailcall{} -> ra_pseudo_tailcall(I, Map);
#smull{} -> ra_smull(I, Map);
@@ -80,10 +86,19 @@ ra_pseudo_li(I=#pseudo_li{dst=Dst}, Map) ->
NewDst = ra_temp(Dst, Map),
I#pseudo_li{dst=NewDst}.
-ra_pseudo_move(I=#pseudo_move{dst=Dst,src=Src}, Map) ->
+ra_pseudo_move(I=#pseudo_move{dst=Dst,src=Src}, Map, Accum) ->
+ NewDst = ra_temp(Dst, Map),
+ NewSrc = ra_temp(Src, Map),
+ case NewSrc#arm_temp.reg =:= NewDst#arm_temp.reg of
+ true -> Accum;
+ false -> [I#pseudo_move{dst=NewDst,src=NewSrc} | Accum]
+ end.
+
+ra_pseudo_spill_move(I=#pseudo_spill_move{dst=Dst,temp=Temp,src=Src}, Map) ->
NewDst = ra_temp(Dst, Map),
+ NewTemp = ra_temp(Temp, Map),
NewSrc = ra_temp(Src, Map),
- I#pseudo_move{dst=NewDst,src=NewSrc}.
+ I#pseudo_spill_move{dst=NewDst, temp=NewTemp, src=NewSrc}.
ra_pseudo_switch(I=#pseudo_switch{jtab=JTab,index=Index}, Map) ->
NewJTab = ra_temp(JTab, Map),
diff --git a/lib/hipe/arm/hipe_arm_ra_postconditions.erl b/lib/hipe/arm/hipe_arm_ra_postconditions.erl
index 8d1ee1cb94..23c305511f 100644
--- a/lib/hipe/arm/hipe_arm_ra_postconditions.erl
+++ b/lib/hipe/arm/hipe_arm_ra_postconditions.erl
@@ -56,6 +56,7 @@ do_insn(I, TempMap, Strategy) ->
#pseudo_call{} -> do_pseudo_call(I, TempMap, Strategy);
#pseudo_li{} -> do_pseudo_li(I, TempMap, Strategy);
#pseudo_move{} -> do_pseudo_move(I, TempMap, Strategy);
+ #pseudo_spill_move{} -> do_pseudo_spill_move(I, TempMap, Strategy);
#pseudo_switch{} -> do_pseudo_switch(I, TempMap, Strategy);
#pseudo_tailcall{} -> do_pseudo_tailcall(I, TempMap, Strategy);
#smull{} -> do_smull(I, TempMap, Strategy);
@@ -108,18 +109,25 @@ do_pseudo_li(I=#pseudo_li{dst=Dst}, TempMap, Strategy) ->
do_pseudo_move(I=#pseudo_move{dst=Dst,src=Src}, TempMap, Strategy) ->
%% Either Dst or Src (but not both) may be a pseudo temp.
- %% pseudo_move and pseudo_tailcall are special cases: in
- %% all other instructions, all temps must be non-pseudos
- %% after register allocation.
- case temp_is_spilled(Dst, TempMap) of
- true -> % Src must not be a pseudo
- {FixSrc,NewSrc,DidSpill} = fix_src1(Src, TempMap, Strategy),
- NewI = I#pseudo_move{src=NewSrc},
- {FixSrc ++ [NewI], DidSpill};
+ %% pseudo_move, pseudo_spill_move, and pseudo_tailcall
+ %% are special cases: in all other instructions, all
+ %% temps must be non-pseudos after register allocation.
+ case temp_is_spilled(Dst, TempMap)
+ andalso temp_is_spilled(Dst, TempMap)
+ of
+ true -> % Turn into pseudo_spill_move
+ Temp = clone(Src, temp1(Strategy)),
+ NewI = #pseudo_spill_move{dst=Dst, temp=Temp, src=Src},
+ {[NewI], true};
_ ->
{[I], false}
end.
+do_pseudo_spill_move(I = #pseudo_spill_move{temp=Temp}, TempMap, _Strategy) ->
+ %% Temp is above the low water mark and must not have been spilled
+ false = temp_is_spilled(Temp, TempMap),
+ {[I], false}. % nothing to do
+
do_pseudo_switch(I=#pseudo_switch{jtab=JTab,index=Index}, TempMap, Strategy) ->
{FixJTab,NewJTab,DidSpill1} = fix_src1(JTab, TempMap, Strategy),
{FixIndex,NewIndex,DidSpill2} = fix_src2(Index, TempMap, Strategy),
diff --git a/lib/hipe/arm/hipe_arm_subst.erl b/lib/hipe/arm/hipe_arm_subst.erl
index 7510c197bd..4ff245f414 100644
--- a/lib/hipe/arm/hipe_arm_subst.erl
+++ b/lib/hipe/arm/hipe_arm_subst.erl
@@ -13,7 +13,7 @@
%% limitations under the License.
-module(hipe_arm_subst).
--export([insn_temps/2]).
+-export([insn_temps/2, insn_lbls/2]).
-include("hipe_arm.hrl").
%% These should be moved to hipe_arm and exported
@@ -31,6 +31,7 @@
-type am3() :: #am3{}.
-type arg() :: temp() | integer().
-type funv() :: #arm_mfa{} | #arm_prim{} | temp().
+-type label() :: non_neg_integer().
-type insn() :: tuple(). % for now
-type subst_fun() :: fun((temp()) -> temp()).
@@ -58,6 +59,8 @@ insn_temps(T, I) ->
#pseudo_call{funv=F} -> I#pseudo_call{funv=funv_temps(T, F)};
#pseudo_call_prepare{} -> I;
#pseudo_li{dst=D} -> I#pseudo_li{dst=T(D)};
+ #pseudo_spill_move{dst=D,temp=U,src=S} ->
+ I#pseudo_spill_move{dst=T(D),temp=T(U),src=T(S)};
#pseudo_switch{jtab=J=#arm_temp{},index=Ix=#arm_temp{}} ->
I#pseudo_switch{jtab=T(J),index=T(Ix)};
#pseudo_tailcall{funv=F,stkargs=Stk} ->
@@ -103,3 +106,22 @@ funv_temps(SubstTemp, T=#arm_temp{}) -> SubstTemp(T).
-spec arg_temps(subst_fun(), arg()) -> arg().
arg_temps(_SubstTemp, Imm) when is_integer(Imm) -> Imm;
arg_temps(SubstTemp, T=#arm_temp{}) -> SubstTemp(T).
+
+-type lbl_subst_fun() :: fun((label()) -> label()).
+
+%% @doc Maps over the branch targets in an instruction
+-spec insn_lbls(lbl_subst_fun(), insn()) -> insn().
+insn_lbls(SubstLbl, I) ->
+ case I of
+ #b_label{label=Label} ->
+ I#b_label{label=SubstLbl(Label)};
+ #pseudo_bc{true_label=T, false_label=F} ->
+ I#pseudo_bc{true_label=SubstLbl(T), false_label=SubstLbl(F)};
+ #pseudo_call{sdesc=Sdesc, contlab=Contlab} ->
+ I#pseudo_call{sdesc=sdesc_lbls(SubstLbl, Sdesc),
+ contlab=SubstLbl(Contlab)}
+ end.
+
+sdesc_lbls(_SubstLbl, Sdesc=#arm_sdesc{exnlab=[]}) -> Sdesc;
+sdesc_lbls(SubstLbl, Sdesc=#arm_sdesc{exnlab=Exnlab}) ->
+ Sdesc#arm_sdesc{exnlab=SubstLbl(Exnlab)}.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 15:24:46 +0000