From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 lib/hipe/rtl/hipe_rtl_ssa.erl | 93 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 lib/hipe/rtl/hipe_rtl_ssa.erl

(limited to 'lib/hipe/rtl/hipe_rtl_ssa.erl')

diff --git a/lib/hipe/rtl/hipe_rtl_ssa.erl b/lib/hipe/rtl/hipe_rtl_ssa.erl
new file mode 100644
index 0000000000..f55cc0dd5c
--- /dev/null
+++ b/lib/hipe/rtl/hipe_rtl_ssa.erl
@@ -0,0 +1,93 @@
+%% -*- erlang-indent-level: 2 -*-
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+%%----------------------------------------------------------------------
+%% File    : hipe_rtl_ssa.erl
+%% Author  : Kostis Sagonas <kostis@it.uu.se>
+%% Created : 30 Jan 2004
+%% Purpose : Provides interface functions for converting RTL code into
+%%	     SSA form and back using the generic SSA converter.
+%%----------------------------------------------------------------------
+
+-module(hipe_rtl_ssa).
+
+-export([uses_to_rename/1]).	%% needed by hipe_rtl_ssa_const_prop
+
+%% The following defines are needed by the included file below
+-define(CODE, hipe_rtl).
+-define(CFG,  hipe_rtl_cfg).
+-define(LIVENESS, hipe_rtl_liveness).
+
+-include("hipe_rtl.hrl").
+-include("../ssa/hipe_ssa.inc").
+     
+%%----------------------------------------------------------------------
+%% Auxiliary operations which seriously differ between Icode and RTL.
+%%----------------------------------------------------------------------
+
+defs_to_rename(Statement) ->
+  Defs = hipe_rtl:defines(Statement),
+  [D || D <- Defs, not hipe_rtl_arch:is_precoloured(D)].
+
+uses_to_rename(Statement) ->
+  Uses = hipe_rtl:uses(Statement),
+  [U || U <- Uses, not hipe_rtl_arch:is_precoloured(U)].
+
+liveout_no_succ() ->
+  hipe_rtl_arch:live_at_return().
+
+%-----------------------------------------------------------------------
+
+reset_var_indx() ->
+  hipe_gensym:set_var(rtl, hipe_rtl_arch:first_virtual_reg()).
+
+%%----------------------------------------------------------------------
+
+is_fp_temp(Temp) ->
+  hipe_rtl:is_fpreg(Temp).
+
+mk_new_fp_temp() ->
+  hipe_rtl:mk_new_fpreg().
+
+%-----------------------------------------------------------------------
+%% Procedure : makePhiMove 
+%% Purpose   : Create an RTL-specific version of a move instruction
+%%             depending on the type of the arguments.
+%% Arguments : Dst, Src - the arguments of a Phi instruction that is
+%%                        to be moved up the predecessor block as part
+%%                        of the SSA un-convert phase.
+%% Returns   : Code
+%% Note      : ?CODE here is hipe_rtl
+%%----------------------------------------------------------------------
+
+makePhiMove(Dst, Src) ->
+  case hipe_rtl:is_fpreg(Dst) of
+    false ->
+      case hipe_rtl:is_fpreg(Src) of %% this test is just a sanity check
+	false ->
+	  hipe_rtl:mk_move(Dst, Src)
+      end;
+    true ->
+      case hipe_rtl:is_fpreg(Src) of %% this test is just a sanity check
+	true ->
+	  hipe_rtl:mk_fmove(Dst, Src)
+      end
+  end.
+
+%-----------------------------------------------------------------------
-- 
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