1992-02-21 16:46:21 -05:00
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/* OSF/rose half-pic support functions.
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Copyright (C) 1992 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* The OSF/rose half-pic model assumes that the non-library code does
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not need to have full PIC (position independent code), but rather,
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that pointers to external references are put into the data section
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and derefenced as normal pointers. References to static data does
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not need to be PIC-ized.
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Another optimization is to have the compiler know what symbols are
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in the shared libraries, and to only lay down the pointers to
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things which in the library proper. */
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#include "config.h"
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#ifdef HALF_PIC_INIT
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#include "tree.h"
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#include "rtl.h"
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#include <stdio.h>
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extern rtx eliminate_constant_term ();
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int flag_half_pic; /* Global half-pic flag. */
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/* Do any half-pic initializations. */
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void
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half_pic_init ()
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{
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flag_half_pic = TRUE;
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}
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/* Encode in a declaration whether or not it is half-pic. */
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void
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half_pic_encode (decl)
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tree decl;
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{
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#if 0
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fprintf (stderr, "\n========== Half_pic_encode\n");
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debug_tree (decl);
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#endif
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}
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/* Return whether an address is half-pic. */
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int
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half_pic_address_p (addr)
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rtx addr;
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{
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char *name;
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switch (GET_CODE (addr))
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{
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case CONST:
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1992-03-17 10:36:31 -05:00
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{
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rtx offset = const0_rtx;
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addr = eliminate_constant_term (addr, &offset);
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if (GET_CODE (addr) != SYMBOL_REF)
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return FALSE;
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}
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1992-02-21 16:46:21 -05:00
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/* fall through */
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case SYMBOL_REF:
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name = XSTR (addr, 0);
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/* If this is a label, it will have a '*' in front of it. */
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if (name[0] == '*')
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return FALSE;
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}
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return FALSE;
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}
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#endif /* HALF_PIC_INIT */
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