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-rw-r--r--lib/hipe/rtl/hipe_rtl.erl5
-rw-r--r--lib/hipe/rtl/hipe_rtl_arith.inc7
-rw-r--r--lib/hipe/rtl/hipe_rtl_ssa_const_prop.erl43
3 files changed, 29 insertions, 26 deletions
diff --git a/lib/hipe/rtl/hipe_rtl.erl b/lib/hipe/rtl/hipe_rtl.erl
index ef06b2abf8..d93f423f0c 100644
--- a/lib/hipe/rtl/hipe_rtl.erl
+++ b/lib/hipe/rtl/hipe_rtl.erl
@@ -354,6 +354,8 @@
phi_arglist_update/2,
phi_redirect_pred/3]).
+-export_type([alub_cond/0]).
+
%%
%% RTL
%%
@@ -590,6 +592,9 @@ branch_pred(#branch{p=P}) -> P.
%% alub
%%
+-type alub_cond() :: 'eq' | 'ne' | 'ge' | 'geu' | 'gt' | 'gtu' | 'le'
+ | 'leu' | 'lt' | 'ltu' | 'overflow' | 'not_overflow'.
+
mk_alub(Dst, Src1, Op, Src2, Cond, True, False) ->
mk_alub(Dst, Src1, Op, Src2, Cond, True, False, 0.5).
mk_alub(Dst, Src1, Op, Src2, Cond, True, False, P) ->
diff --git a/lib/hipe/rtl/hipe_rtl_arith.inc b/lib/hipe/rtl/hipe_rtl_arith.inc
index 31fedd927e..9e80fa5e13 100644
--- a/lib/hipe/rtl/hipe_rtl_arith.inc
+++ b/lib/hipe/rtl/hipe_rtl_arith.inc
@@ -119,7 +119,8 @@ eval_alu(Op, Arg1, Arg2) ->
%% there are cases where we can evaluate a subset of the bits, but can
%% not do a full eval-alub call (eg. a + 0 gives no carry)
%%
--spec eval_cond_bits(atom(), boolean(), boolean(), boolean(), boolean()) -> boolean().
+-spec eval_cond_bits(hipe_rtl:alub_cond(), boolean(),
+ boolean(), boolean(), boolean()) -> boolean().
eval_cond_bits(Cond, N, Z, V, C) ->
case Cond of
@@ -146,9 +147,7 @@ eval_cond_bits(Cond, N, Z, V, C) ->
'overflow' ->
V;
'not_overflow' ->
- not V;
- _ ->
- ?EXIT({'condition code not handled',Cond})
+ not V
end.
eval_alub(Op, Cond, Arg1, Arg2) ->
diff --git a/lib/hipe/rtl/hipe_rtl_ssa_const_prop.erl b/lib/hipe/rtl/hipe_rtl_ssa_const_prop.erl
index 76c0a88933..64d723d15d 100644
--- a/lib/hipe/rtl/hipe_rtl_ssa_const_prop.erl
+++ b/lib/hipe/rtl/hipe_rtl_ssa_const_prop.erl
@@ -93,8 +93,6 @@
-include("../ssa/hipe_ssa_const_prop.inc").
-type bool_lattice() :: 'true' | 'false' | 'top' | 'bottom'.
--type conditional() :: 'eq' | 'ne' | 'ge' | 'geu' | 'gt' | 'gtu' | 'le'
- | 'leu' | 'lt' | 'ltu' | 'overflow' | 'not_overflow'.
%%-----------------------------------------------------------------------------
%% Procedure : visit_expression/2
@@ -400,7 +398,7 @@ maybe_top_or_bottom([top | Rest], _) -> maybe_top_or_bottom(Rest, top);
maybe_top_or_bottom([bottom | _], _) -> bottom;
maybe_top_or_bottom([_ | Rest], TB) -> maybe_top_or_bottom(Rest, TB).
--spec partial_eval_branch(conditional(), bool_lattice(), bool_lattice(),
+-spec partial_eval_branch(hipe_rtl:alub_cond(), bool_lattice(), bool_lattice(),
bool_lattice() | 0, bool_lattice() | 0) ->
bool_lattice().
partial_eval_branch(Cond, N0, Z0, V0, C0) ->
@@ -441,14 +439,14 @@ visit_alub(Inst, Env) ->
hipe_rtl:alub_false_label(Inst)];
top -> [];
_ ->
- %if the partial branch cannot be evaluated we must execute the
- % instruction at runtime.
+ %% if the partial branch cannot be evaluated we must execute the
+ %% instruction at runtime.
case partial_eval_branch(hipe_rtl:alub_cond(Inst), N, Z, C, V) of
bottom -> [hipe_rtl:alub_true_label(Inst),
hipe_rtl:alub_false_label(Inst)];
top -> [];
- true -> [hipe_rtl:alub_true_label(Inst) ];
- false -> [hipe_rtl:alub_false_label(Inst) ]
+ true -> [hipe_rtl:alub_true_label(Inst)];
+ false -> [hipe_rtl:alub_false_label(Inst)]
end
end,
{[], NewSSA, NewEnv} = set_to(hipe_rtl:alub_dst(Inst), NewVal, Env),
@@ -944,8 +942,8 @@ update_branch(Inst, Env) ->
%% some small helpers.
alub_to_move(Inst, Res, Lab) ->
- [ hipe_rtl:mk_move(hipe_rtl:alub_dst(Inst), Res),
- hipe_rtl:mk_goto(Lab) ].
+ [hipe_rtl:mk_move(hipe_rtl:alub_dst(Inst), Res),
+ hipe_rtl:mk_goto(Lab)].
make_alub_subst_list(bottom, _, Tail) -> Tail;
make_alub_subst_list(top, Src, _) ->
@@ -970,13 +968,13 @@ update_alub(Inst, Env) ->
%% move and the branch. We can however replace variable with constants:
S1 = make_alub_subst_list(Val1, Src1, []),
S2 = make_alub_subst_list(Val2, Src2, S1),
- [ hipe_rtl:subst_uses(S2, Inst) ];
- _ -> % we know where we will be going, let's find out what Dst should be.
- % knowing where we are going means that at most one of the values is
- % bottom, hence we can replace the alu-instr with a move.
- % remember, a = b + 0 can give us enough info to know what jump to
- % do without knowing the value of a. (I wonder if this will ever
- % actualy happen ;)
+ [hipe_rtl:subst_uses(S2, Inst)];
+ _ -> %% we know where we will be going, let's find out what Dst should be.
+ %% knowing where we are going means that at most one of the values is
+ %% bottom, hence we can replace the alu-instr with a move.
+ %% remember, a = b + 0 can give us enough info to know what jump to
+ %% do without knowing the value of a. (I wonder if this will ever
+ %% actualy happen ;)
Res = case ResVal of
bottom -> % something nonconstant.
if (Val1 =:= bottom) -> Src1;
@@ -985,11 +983,12 @@ update_alub(Inst, Env) ->
_ -> hipe_rtl:mk_imm(ResVal)
end,
case CondRes of
- top -> io:format("oops. something VERY bad: ~w ~w V1 & 2 ~w ~w\n",
- [Inst, {ResVal, N, Z, C, V} , Val1, Val2]),
- [Inst ];
- true -> alub_to_move(Inst, Res, hipe_rtl:alub_true_label(Inst));
- false -> alub_to_move(Inst, Res, hipe_rtl:alub_false_label(Inst))
+ top ->
+ io:format("oops. something VERY bad: ~w ~w V1 & 2 ~w ~w\n",
+ [Inst, {ResVal, N, Z, C, V} , Val1, Val2]),
+ [Inst];
+ true -> alub_to_move(Inst, Res, hipe_rtl:alub_true_label(Inst));
+ false -> alub_to_move(Inst, Res, hipe_rtl:alub_false_label(Inst))
end
end.
@@ -1050,7 +1049,7 @@ update_phi(Instruction, Environment) ->
%%-----------------------------------------------------------------------------
-%% make sure that all precoloured rgisters are taken out of the equation.
+%% make sure that all precoloured registers are taken out of the equation.
lookup_lattice_value(X, Environment) ->
case hipe_rtl_arch:is_precoloured(X) or hipe_rtl:is_const_label(X) of
true ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 16:12:59 +0000