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vax.h (ELIMINABLE_REGS): Define.

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2016-09-20  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * config/var/vax.h (ELIMINABLE_REGS): Define.
        (INITIAL_ELIMINATION_OFFSET): Define.

From-SVN: r240269
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Bernd Edlinger 2016-09-20 15:28:02 +00:00 committed by Bernd Edlinger
parent f5bd4ad831
commit 978fc7d446
2 changed files with 15 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-09-20 Bernd Edlinger <bernd.edlinger@hotmail.de>
* config/var/vax.h (ELIMINABLE_REGS): Define.
(INITIAL_ELIMINATION_OFFSET): Define.
2016-09-20 Jakub Jelinek <jakub@redhat.com>
PR middle-end/77624

10
gcc/config/vax/vax.h
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@ -333,6 +333,16 @@ enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES };
} \
while (0)
/* 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}}
/* On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this
macro doesn't matter for register eliminations, but it should still
give realistic data for rtx_addr_can_trap_p. */
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
((OFFSET) = get_frame_size ())
/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
the stack pointer does not matter. The value is tested only in
functions that have frame pointers.