hipe_sparc: Add code rewrite RA callbacks

These will not only be useful for hipe_regalloc_prepass, but also, after
the introduction of a mk_move/2 (or similar) callback, for the purpose
of range splitting.

Since the substitution needed to case over all the instructions, a new
module, hipe_sparc_subst, was introduced to the sparc backend.

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/hipe/sparc/hipe_sparc_subst.erl b/lib/hipe/sparc/hipe_sparc_subst.erl
new file mode 100644
index 0000000000..e5cd244985
--- /dev/null
+++ b/lib/hipe/sparc/hipe_sparc_subst.erl
@@ -0,0 +1,85 @@
+%% -*- erlang-indent-level: 2 -*-
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2016. All Rights Reserved.
+%% 
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%% 
+%% %CopyrightEnd%
+%%
+
+-module(hipe_sparc_subst).
+-export([insn_temps/2]).
+-include("hipe_sparc.hrl").
+
+%% These should be moved to hipe_sparc and exported
+-type temp()    :: #sparc_temp{}.
+-type src2()    :: temp() | #sparc_simm13{}.
+-type src2b()   :: src2() | #sparc_uimm5{}.
+-type funv()    :: #sparc_mfa{} | #sparc_prim{} | temp().
+-type arg()     :: temp() | integer().
+-type insn()    :: tuple(). % for now
+
+-type subst_fun() :: fun((temp()) -> temp()).
+
+%% @doc Maps over the temporaries in an instruction
+-spec insn_temps(subst_fun(), insn()) -> insn().
+insn_temps(T, I) ->
+  S2 = fun(O) -> src2_temps(T, O) end,
+  S2B = fun(O) -> src2b_temps(T, O) end,
+  Arg = fun(O) -> arg_temps(T, O) end,
+  case I of
+      #alu{src1=L,src2=R,dst=D} -> I#alu{src1=T(L),src2=S2B(R),dst=T(D)};
+      #bp{} -> I;
+      #comment{} -> I;
+      #jmp{src1=L,src2=R} -> I#jmp{src1=T(L),src2=S2(R)};
+      #label{} -> I;
+      #pseudo_bp{} -> I;
+      #pseudo_call{funv=F} -> I#pseudo_call{funv=funv_temps(T,F)};
+      #pseudo_call_prepare{} -> I;
+      #pseudo_move{src=S,dst=D} -> I#pseudo_move{src=T(S),dst=T(D)};
+      #pseudo_ret{} -> I;
+      #pseudo_set{dst=D}-> I#pseudo_set{dst=T(D)};
+      #pseudo_tailcall{funv=F,stkargs=Stk} ->
+	  I#pseudo_tailcall{funv=funv_temps(T,F),stkargs=lists:map(Arg,Stk)};
+      #pseudo_tailcall_prepare{} -> I;
+      #rdy{dst=D} -> I#rdy{dst=T(D)};
+      #sethi{dst=D} -> I#sethi{dst=T(D)};
+      #store{src=S,base=B,disp=D} -> I#store{src=T(S),base=T(B),disp=S2(D)};
+      #fp_binary{src1=L,src2=R,dst=D} ->
+	  I#fp_binary{src1=T(L),src2=T(R),dst=T(D)};
+      #fp_unary{src=S,dst=D} -> I#fp_unary{src=T(S),dst=T(D)};
+      #pseudo_fload{base=B,disp=Di,dst=Ds} ->
+	  I#pseudo_fload{base=T(B),disp=S2(Di),dst=T(Ds)};
+      #pseudo_fmove{src=S,dst=D} -> I#pseudo_fmove{src=T(S),dst=T(D)};
+      #pseudo_fstore{src=S,base=B,disp=D} ->
+	  I#pseudo_fstore{src=T(S),base=T(B),disp=S2(D)}
+  end.
+
+-spec src2_temps(subst_fun(), src2()) -> src2().
+src2_temps(_SubstTemp, I=#sparc_simm13{}) -> I;
+src2_temps(SubstTemp,  T=#sparc_temp{}) -> SubstTemp(T).
+
+-spec src2b_temps(subst_fun(), src2b()) -> src2b().
+src2b_temps(_SubstTemp, I=#sparc_uimm5{}) -> I;
+src2b_temps(SubstTemp, Op) -> src2_temps(SubstTemp, Op).
+
+-spec funv_temps(subst_fun(), funv()) -> funv().
+funv_temps(_SubstTemp, M=#sparc_mfa{}) -> M;
+funv_temps(_SubstTemp, P=#sparc_prim{}) -> P;
+funv_temps(SubstTemp,  T=#sparc_temp{}) -> SubstTemp(T).
+
+-spec arg_temps(subst_fun(), arg()) -> arg().
+arg_temps(_SubstTemp, Imm) when is_integer(Imm) -> Imm;
+arg_temps(SubstTemp,  T=#sparc_temp{}) -> SubstTemp(T).