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expr.c (expand_assignment): Add code to handle variable-sized BLKmode case. 

* expr.c (expand_assignment): Add code to handle variable-sized
	BLKmode case.

From-SVN: r32749
This commit is contained in:
Richard Kenner 2000-03-26 12:05:34 -05:00
parent 751312371e
commit a69beca121
1 changed files with 42 additions and 20 deletions
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62
gcc/expr.c
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@ -3447,27 +3447,49 @@ expand_assignment (to, from, want_value, suggest_reg)
TYPE_MODE (integer_type_node));
}
result = store_field (to_rtx, bitsize, bitpos, mode1, from,
(want_value
/* Spurious cast makes HPUX compiler happy. */
? (enum machine_mode) TYPE_MODE (TREE_TYPE (to))
: VOIDmode),
unsignedp,
/* Required alignment of containing datum. */
alignment,
int_size_in_bytes (TREE_TYPE (tem)),
get_alias_set (to));
preserve_temp_slots (result);
free_temp_slots ();
pop_temp_slots ();
/* If this is a varying-length object, we must get the address of
the source and do an explicit block move. */
if (bitsize < 0)
{
unsigned int from_align;
rtx from_rtx = expand_expr_unaligned (from, &from_align);
rtx inner_to_rtx
= change_address (to_rtx, VOIDmode,
plus_constant (XEXP (to_rtx, 0),
bitpos / BITS_PER_UNIT));
/* If the value is meaningful, convert RESULT to the proper mode.
Otherwise, return nothing. */
return (want_value ? convert_modes (TYPE_MODE (TREE_TYPE (to)),
TYPE_MODE (TREE_TYPE (from)),
result,
TREE_UNSIGNED (TREE_TYPE (to)))
: NULL_RTX);
emit_block_move (inner_to_rtx, from_rtx, expr_size (from),
MIN (alignment, from_align) / BITS_PER_UNIT);
free_temp_slots ();
pop_temp_slots ();
return to_rtx;
}
else
{
result = store_field (to_rtx, bitsize, bitpos, mode1, from,
(want_value
/* Spurious cast for HPUX compiler. */
? ((enum machine_mode)
TYPE_MODE (TREE_TYPE (to)))
: VOIDmode),
unsignedp,
/* Required alignment of containing datum. */
alignment,
int_size_in_bytes (TREE_TYPE (tem)),
get_alias_set (to));
preserve_temp_slots (result);
free_temp_slots ();
pop_temp_slots ();
/* If the value is meaningful, convert RESULT to the proper mode.
Otherwise, return nothing. */
return (want_value ? convert_modes (TYPE_MODE (TREE_TYPE (to)),
TYPE_MODE (TREE_TYPE (from)),
result,
TREE_UNSIGNED (TREE_TYPE (to)))
: NULL_RTX);
}
}
/* If the rhs is a function call and its value is not an aggregate,