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/* Definitions for PA_RISC with ELF format on 64-bit Linux
Copyright (C) 1999-2017 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#if 0 /* needs some work :-( */
/* If defined, this macro specifies a table of register pairs used to
eliminate unneeded registers that point into the stack frame. */
#define ELIMINABLE_REGS \
{ \
{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
}
/* This macro returns the initial difference between the specified pair
of registers. */
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
do \
{ \
int fsize; \
\
fsize = pa_compute_frame_size (get_frame_size (), 0); \
if ((TO) == FRAME_POINTER_REGNUM \
&& (FROM) == ARG_POINTER_REGNUM) \
{ \
(OFFSET) = -16; \
break; \
} \
\
gcc_assert ((TO) == STACK_POINTER_REGNUM); \
\
switch (FROM) \
{ \
case FRAME_POINTER_REGNUM: \
(OFFSET) = - fsize; \
break; \
\
case ARG_POINTER_REGNUM: \
(OFFSET) = - fsize - 16; \
break; \
\
default: \
gcc_unreachable (); \
} \
} while (0)
#endif
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