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sparc.h (EXPAND_BUILTIN_VA_START): Define. 

* sparc.h (EXPAND_BUILTIN_VA_START): Define.
        (EXPAND_BUILTIN_VA_ARG): Define.
        * sparc.c (sparc_va_start): New.
        (sparc_va_arg): New.

From-SVN: r29115
This commit is contained in:
Richard Henderson 1999-09-04 17:16:18 -07:00 committed by Richard Henderson
parent 1b893504b3
commit a8b2c8a1ba
3 changed files with 105 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
Sat Sep 4 17:15:13 1999 Richard Henderson <rth@cygnus.com>
* sparc.h (EXPAND_BUILTIN_VA_START): Define.
(EXPAND_BUILTIN_VA_ARG): Define.
* sparc.c (sparc_va_start): New.
(sparc_va_arg): New.
Sun Sep 5 11:11:59 1999 Michael Hayes <m.hayes@elec.canterbury.ac.nz>
* config/c4x/c4x.h (DBR_OUTPUT_SEQEND): Use XVECEXP not XEXPs.

90
gcc/config/sparc/sparc.c
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@ -4280,6 +4280,96 @@ sparc_builtin_saveregs ()
return address;
}
/* Implement `va_start' for varargs and stdarg. */
void
sparc_va_start (stdarg_p, valist, nextarg)
int stdarg_p ATTRIBUTE_UNUSED;
tree valist;
rtx nextarg;
{
nextarg = expand_builtin_saveregs ();
std_expand_builtin_va_start (1, valist, nextarg);
}
/* Implement `va_arg'. */
rtx
sparc_va_arg (valist, type)
tree valist, type;
{
HOST_WIDE_INT size, rsize, align;
tree addr, incr, tmp;
rtx addr_rtx;
int indirect = 0;
/* Round up sizeof(type) to a word. */
size = int_size_in_bytes (type);
rsize = (size + UNITS_PER_WORD - 1) & -UNITS_PER_WORD;
align = 0;
if (TARGET_ARCH64)
{
if (TYPE_ALIGN (type) >= 2 * BITS_PER_WORD)
align = 2 * UNITS_PER_WORD;
if (AGGREGATE_TYPE_P (type) && size > 16)
{
indirect = 1;
size = rsize = UNITS_PER_WORD;
}
}
else
{
if (AGGREGATE_TYPE_P (type)
|| TYPE_MODE (type) == TFmode
|| TYPE_MODE (type) == TCmode)
{
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;
if (align)
{
incr = fold (build (PLUS_EXPR, ptr_type_node, incr,
build_int_2 (align - 1, 0)));
incr = fold (build (BIT_AND_EXPR, ptr_type_node, incr,
build_int_2 (-align, -1)));
}
addr = incr = save_expr (incr);
if (BYTES_BIG_ENDIAN && size < rsize)
{
addr = fold (build (PLUS_EXPR, ptr_type_node, incr,
build_int_2 (rsize - size, 0)));
}
incr = fold (build (PLUS_EXPR, ptr_type_node, incr,
build_int_2 (rsize, 0)));
incr = build (MODIFY_EXPR, ptr_type_node, valist, incr);
TREE_SIDE_EFFECTS (incr) = 1;
expand_expr (incr, const0_rtx, VOIDmode, EXPAND_NORMAL);
addr_rtx = expand_expr (addr, NULL, Pmode, EXPAND_NORMAL);
if (indirect)
{
addr_rtx = force_reg (Pmode, addr_rtx);
addr_rtx = gen_rtx_MEM (Pmode, addr_rtx);
MEM_ALIAS_SET (addr_rtx) = get_varargs_alias_set ();
}
return addr_rtx;
}
/* Return the string to output a conditional branch to LABEL, which is
the operand number of the label. OP is the conditional expression.

8
gcc/config/sparc/sparc.h
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@ -2046,6 +2046,14 @@ void sparc64_initialize_trampoline ();
extern struct rtx_def *sparc_builtin_saveregs ();
#define EXPAND_BUILTIN_SAVEREGS() sparc_builtin_saveregs ()
/* Implement `va_start' for varargs and stdarg. */
#define EXPAND_BUILTIN_VA_START(stdarg, valist, nextarg) \
sparc_va_start (stdarg, valist, nextarg)
/* Implement `va_arg'. */
#define EXPAND_BUILTIN_VA_ARG(valist, type) \
sparc_va_arg (valist, type)
/* Define this macro if the location where a function argument is passed
depends on whether or not it is a named argument.