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sparc.c (sparc_va_arg): When the required alignment is more than that provided, copy to a temporary.

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* config/sparc/sparc.c (sparc_va_arg): When the required alignment
	is more than that provided, copy to a temporary.

From-SVN: r37344
This commit is contained in:
Geoffrey Keating 2000-11-09 17:38:20 +00:00 • committed by Geoffrey Keating
parent 1caa7aba31
commit 9a0662b4d5
2 changed files with 36 additions and 6 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2000-11-08 Geoffrey Keating <geoffk@redhat.com>
* config/sparc/sparc.c (sparc_va_arg): When the required alignment
is more than that provided, copy to a temporary.
2000-11-09 Alexandre Oliva <aoliva@redhat.com>
* mklibgcc.in (EXTRA_MULTILIB_PARTS): Prevent `make' from

37
gcc/config/sparc/sparc.c
View file

@ -4793,12 +4793,6 @@ sparc_va_arg (valist, type)
indirect = 1;
size = rsize = UNITS_PER_WORD;
}
else
{
/* ??? The old va-sparc.h implementation, for 8 byte objects
copied stuff to a temporary -- I don't see that that
provides any more alignment than the stack slot did. */
}
}
incr = valist;
@ -4825,6 +4819,37 @@ sparc_va_arg (valist, type)
addr_rtx = expand_expr (addr, NULL, Pmode, EXPAND_NORMAL);
/* If the address isn't aligned properly for the type,
we may need to copy to a temporary.
FIXME: This is inefficient. Usually we can do this
in registers. */
if (align == 0
&& TYPE_ALIGN (type) > BITS_PER_WORD
&& !indirect)
{
/* FIXME: We really need to specify that the temporary is live
for the whole function because expand_builtin_va_arg wants
the alias set to be get_varargs_alias_set (), but in this
case the alias set is that for TYPE and if the memory gets
reused it will be reused with alias set TYPE. */
rtx tmp = assign_temp (type, 0, 1, 0);
rtx dest_addr;
addr_rtx = force_reg (Pmode, addr_rtx);
addr_rtx = gen_rtx_MEM (BLKmode, addr_rtx);
MEM_ALIAS_SET (addr_rtx) = get_varargs_alias_set ();
tmp = shallow_copy_rtx (tmp);
PUT_MODE (tmp, BLKmode);
MEM_ALIAS_SET (tmp) = 0;
dest_addr = emit_block_move (tmp, addr_rtx, GEN_INT (rsize),
BITS_PER_WORD);
if (dest_addr != NULL_RTX)
addr_rtx = dest_addr;
else
addr_rtx = XCEXP (tmp, 0, MEM);
}
if (indirect)
{
addr_rtx = force_reg (Pmode, addr_rtx);