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jlechner |
/* Definitions for PA_RISC with ELF format on 64-bit Linux
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Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC 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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GCC 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 GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#if 0 /* needs some work :-( */
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/* If defined, this macro specifies a table of register pairs used to
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eliminate unneeded registers that point into the stack frame. */
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#define ELIMINABLE_REGS \
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{ \
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{FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
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{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
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{ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
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}
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/* A C expression that returns nonzero if the compiler is allowed to try to
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replace register number FROM with register number TO. The frame pointer
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is automatically handled. */
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#define CAN_ELIMINATE(FROM, TO) 1
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/* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It
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specifies the initial difference between the specified pair of
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registers. This macro must be defined if `ELIMINABLE_REGS' is
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defined. */
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#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
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do \
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{ \
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int fsize; \
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\
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fsize = compute_frame_size (get_frame_size (), 0); \
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if ((TO) == FRAME_POINTER_REGNUM \
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&& (FROM) == ARG_POINTER_REGNUM) \
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{ \
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(OFFSET) = -16; \
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break; \
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} \
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\
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gcc_assert ((TO) == STACK_POINTER_REGNUM); \
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\
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switch (FROM) \
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{ \
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case FRAME_POINTER_REGNUM: \
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(OFFSET) = - fsize; \
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break; \
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\
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case ARG_POINTER_REGNUM: \
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(OFFSET) = - fsize - 16; \
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break; \
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\
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default: \
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gcc_unreachable (); \
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} \
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} while (0)
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#endif
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